Humor as a Form of Cultural Expression Essay -- Culture

Humor as a Form of Cultural Expression How can one look at a culture and understand its origins, its values, its accomplishments and failures? Through art, poetry, or other literary, or scientific advances? Maybe even in its political standpoints? All of these methods are acceptable. There is one I did not mention in the above list however. It can be considered trivial by some, but I think it is also important. Perhaps we can understand a culture by its humor. Even on the surface the jokes of a country generally reflect its habitat, attitude, and its people. In the US for instance, most jokes you hear on late-night television would probably be political ones, bashing this political figure or the next. Why is this so? Perhaps because Americans have strong feelings about the politics in their country, and have the right of free speech. Because of the former the jokes come about, and because of the latter they are aired on national television. As for reflecting the environment, another popular collection of American jokes usually starts with the words â€Å"A guy walks into a bar ...† Just by looking at this â€Å"prefix† we can see that many Americans spend a lot of time in bars. Thus we see the usual â€Å"environment† of all important occurrences in the daily life of an American. In the USSR, most jokes would take place in a store or marketplace, because that is where people spent most of their time -- waiting in line s. A joke is as much of a national expression as folk stories, tales and legends. Except those three talk about past times, and the joke is current. I originally come from the former Soviet Union, and there the joke was an even more popular media than television, art or books. It was not censored by the government, whi... ...es in both cultures. For example : â€Å"In the meat department of a supermarket, a customer is asking : ‘Don’t you have any fish?’ The reply is : ‘No. We don’t have any meat. They don’t have fish in aisle 7’.† This type of joke would not travel very far in the US because not many people would understand it. It was much more effective when there actually was no fish or meat in the stores at the time I heard it. You wouldn’t have this problem in the US (unless there was some terrible war or another such calamity). This joke never came about in the US. It (hopefully) never will. What’s more, it doesn’t catch on, because it takes special conditions to understand this type of sarcasm. They are funny. At times also sad. But jokes have to get credit for the benefit, and insight they can provide. We cannot overlook them. But on the other hand, don’t take it too seriously.

What I Have Learned in This Course

I have learned a great deal in this course in relation to writing argumentative essays. There is much research involved, as well as objectivity to the position taken on a particular subject. These are, what I have learned, to be the two most important factors in the preparation for a paper. A writer must look at all possible arguments to support his or her position and make this very concise in the thesis statement in the first paragraph of the work. Similarly, one must look at any counterarguments that could arise from the thesis and explore these, as well. All of this research must be done before the paper is written and woven in the supporting paragraphs in the piece. Of equal importance is taking a professional stance on the position/thesis and not an emotionally-driven stance. Using â€Å"I† statements is unacceptable, such as stating â€Å"I think that this is the best policy†¦ †, for instance. Conclusions must come from extensive data review and demonstrate an extremely objective, yet clear stance on the subject from beginning to end. All supporting paragraphs, after the introductory paragraph, that includes the thesis and main points that support it, should be filled with explanatory data to provide cause for the writer’s position. After these arguments (supported by other research) are presented, then counterarguments should be noted. Having not only an literature review before beginning a paper, but, also, an outline with supporting arguments for the position and counter claims to the position with a response to them will make this portion of the argumentative paper easier and is extremely beneficial to the first draft of the work. It is standard in a shorter essay to use four supporting paragraphs that all flow consistently from paragraph to paragraph and a conclusion that does not introduce new facts, but highlights the importance of the writer’s previous information in this final paragraph. This final paragraph should not simply reiterate everything that is already written, but restate the main points and help further support the important stance taken on an issue. This â€Å"wrap-up† of the paper should leave no doubt in the reader’s mind as to exactly what the writer intends the reader to absorb and the importance of the issue to that reader. If further writing and research on the subject is planned, the final paragraph should indicate this. As many times, a short argumentative essay may evolve into a larger research project. After compiling the research, the outline, and then the first draft of the essay, a writer must then review the work and make any needed changes to the paper. Grammatical errors should be corrected, as well as any language that is unclear and may confuse the reader. These essays must be very precise and to the point, so they may involve more than one revision to make a great final paper. I have, also, learned to ask for help involving feedback and constructive criticism, to help understand how another person views my essay. I have learned so much in this class involving this topic and realize that if I follow these â€Å"rules† of writing I can create a great paper. It was hard for me personally, to ask for help, but learned that that is one of the best ways to learn more about how to be a better writer, listener, and student.

Five 600 Word Essays On Business (Property) Skills - Free Essay Example

Sample details Pages: 13 Words: 3923 Downloads: 1 Date added: 2017/06/26 Category Law Essay Type Essay any type Level High school Did you like this example? Five 600 word essays on business (Property) skills 1. A Short essay (600 words) on commercial property leases explaining: â€Å"The most important points to note in a commercial lease†. (this is designed to develop your understanding of commercial property leases). The first quality which should be present in any commercial property lease is synergy between the purposes permitted under the terms of the lease, (or that for which it has been used for ten years), and the planning permission which pertains to the property. Don’t waste time! Our writers will create an original "Five 600 Word Essays On Business (Property) Skills" essay for you Create order The landlord should be able to prove the appropriate planning permission exists, whilst the tenant will be liable for bringing the premises into a state compliant with any contingent planning requirements, i.e. those introduced during the lifetime of the lease. (Freedman and Steele 1998: p.119) Considering the contemporary trends towards environmental control and improvement, this is no small consideration. The differences between a new lease and an existing lease should also be considered: generally speaking, a completely new lease is likely to generate less costs, fewer complications, and be contingent upon a shorter timeframe than an existing one. Further to this, the issues arising out of Security of Tenure must be carefully weighed: basically, this will determine whether or not the tenant will have the automatic right to a new lease when the existing one expires. The 1954 Landlord and Tenant Act prescribes protection for the tenant on satisfaction of the relevant conditio ns, i.e., à ¢Ã¢â€š ¬Ã‚ ¢ There must be a tenancy in the legally defined sense of that status à ¢Ã¢â€š ¬Ã¢â‚¬Å" not a licence. à ¢Ã¢â€š ¬Ã‚ ¢ The tenant must occupy at least part of the leased premises. à ¢Ã¢â€š ¬Ã‚ ¢ Any such occupation must be, at least in part, for the purposes of the tenants business, as prescribed by the lease. However, if such occupation is only partial, the effect of this will be to limit the tenants new tenancy rights to those specific parts of the premises. (Lamont et al. 2005: p.4). The tenant also has to consider the intensity, i.e. the continuity of their use of the premises: if the latter is not constant, they may be obliged to prove unbroken use through a prescribed legal test. (Lamont et al., 2005: p.14). The conventional commercial issues will also need to be considered, i.e. the length of the lease, the rent, whether or not a rent bond or guarantor is required, and whether or not Value Added Tax is chargeable on it. This will depend up on whether or not the landlord has elected to waive VAT exemption, in agreement with HMRC. (Freedman and Steele 1998: p.33) Other key issues include responsibility for insurance(s), the presence of a break clause allowing the landlord an early cessation of the lease, whether or not the premises may be underlet, and the intervals of any integral rent reviews. All of these sub-considerations need to be weighed carefully against the tenants future plans: for example, a clause permitting the user the assignation or subletting the premises does not completely absolve them from reference to the landlord. They may still be entitled to withhold their consent, even if the core purpose of the sub-lessee is in keeping with the original terms of the lease. (Freedman and Steele 1998: p.116) The prospective tenant may need to pursue incorporation of the appropriate Schedule of Condition, taking into consideration any existing issues with the maintenance of the property: this is the mea ns of avoiding the responsibilities contingent upon a full repairing lease. This is, in itself, insufficient to ensure that all future maintenance liabilities are avoided, as they may also be incorporate into service charge clauses. It should also be borne in mind that, as long as they have complied with the regulations on the preconditions of liability, a landlord may be able to commute service charges into additional rent, and pursue recovery in the usual manner, i.e. through the courts. (Freedman and Steele 1998: p.50) As a tenant, you must also establish if the property provides you with everything you require in its unaltered state, or allow you the facility of making such changes as you may consider necessary, i.e. through variations or licenses to alter within the lease? Yielding Up covenants may require that anything added to the premises during the lease is either left in place, or removed: either contingency may involve additional losses for the tenant. (Freedman and Steele 1998: p.103). 2. A Short essay (600 words) outlining the various approaches to Alternative Dispute Resolution and a reflection on its advantages in todays UK market. (This is designed to assess your understanding of the range of methods available for resolving property disputes). In discussing the various approaches possible within Alternative Dispute Resolution in the UK, it is first necessary to recognise the framework and developments which have informed the contemporary arrangements. The market for ADR services was prompted by the desire for or necessity of avoiding formal litigation. As such, the associated frameworks were given additional definition by the Civil Procedure Rules of 1998, as a result of which, à ¢Ã¢â€š ¬Ã‚ ¦ADR was specifically recognised for the first time at the heart of civil justice procedure, as a tool of active case managementà ¢Ã¢â€š ¬Ã‚ ¦ (Mackie et al 2007: p.4). Through this means, ADR accrued much of its value to end users, in terms of cost reduction, flexibility, and timescale of operation. However, it should also be borne in mind that this same flexibility is reflected in the diffuse, protean, and comparatively informal or unstructured nature of many of the available ADR options: as Mackie et al. express it, there are à ¢Ã¢â€š ¬Ã‚ ¦many ways of defining ADR. (2007: p.8). The more prominent may be identified asà ¢Ã¢â€š ¬Ã‚ ¦ à ¢Ã¢â€š ¬Ã‚ ¢ Mediation, or a structured dispute resolution procedure, incorporating third parties, without a legally binding resolution, i.e. (Mackie et al. 2007: p.8). à ¢Ã¢â€š ¬Ã‚ ¢ Evaluative Processes, such as Early Neutral Evaluation (ENE), Judicial Appraisal, or Expert Opinion: all of these are designed to clarify the issues involved at an early stage, and, if they cannot provide resolution, offer initial indication(s) of the likely outcome(s) of any further processes. (Mackie et al. 2007: p.13). à ¢Ã¢â€š ¬Ã‚ ¢ Adjudicative Processes, ranging from the non-binding judgments of third parties, the use of applicable Ombudsman schemes, (to which both parties in the dispute agree), through to actual litigation. à ¢Ã¢â€š ¬Ã‚ ¢ Hybrid Processes, i.e., Executive Tribunals, Mini-Trials, and Med-Arb. As Mackie et al. explain, à ¢Ã¢â€š ¬Ã‚ ¦Arb-Med may also be attempted, where the third party makes an arbitral decision but keeps it in a sealed envelope while switching to mediation, only revealing the decision if the mediation does not result in settlement. (Mackie 2007: p.14). The nature of ADR with specific regard to property continues to evolve in proportion to the demands of the market, and the established precedents. For example, the repetition of similar kinds of disputes under Mobile Homes Act 1983 has led to their transfer to the Residential Property Tribunals as of April 2010. The intermediate status of the latter is illustrated by the fact that its decisions imply no enforcement powers: instead, possible contingent actions through the County Courts are at the discretion of the plaintiff party. As the convening Tribunal Service itself explains regarding its sub-committees, à ¢Ã¢â€š ¬Ã‚ ¦they are quasi-judicial bodies, which means that housing legislation has given them the powers to settle some disputes which wou ld otherwise have to be dealt with by the Courts. They provide an easier and generally cheaper alternative to the Court system. (Residential Property Tribunal Service 2009). In conclusion then, the advantages of ADR in the contemporary market may be regarded as those ofà ¢Ã¢â€š ¬Ã‚ ¦ à ¢Ã¢â€š ¬Ã‚ ¢ Cost: considerably lower, in comparative terms, than those of litigation. à ¢Ã¢â€š ¬Ã‚ ¢ Timeframe: shorter and considerably more flexible than those implied by involvement with the courts. This may be a major issue for parties involved in commercial, i.e. income-contingent outcomes. à ¢Ã¢â€š ¬Ã‚ ¢ Control: in ADR, both parties have the facility of involvement and intervention in the process, rather than being locked into the pre-defined procedures à ¢Ã¢â€š ¬Ã¢â‚¬Å" and outcomes à ¢Ã¢â€š ¬Ã¢â‚¬Å" of formal court proceedings. à ¢Ã¢â€š ¬Ã‚ ¢ Damage Limitation: the adversarial nature of litigation may permanently destroy relationships between parties which might otherwise b een of commercial value in the future. à ¢Ã¢â€š ¬Ã‚ ¢ Self-Determination: both parties have the possibility of helping to construct creative and flexible solutions. à ¢Ã¢â€š ¬Ã‚ ¢ Confidentiality: the proceedings of a court hearing are a matter of public record, so sensitive commercial details cannot be protected. 3. A Short essay (600 words) identifying the nature of professional ethics together with examples of instances where these might be compromised. Include comment on problems outlined by speaker. Include a reflection as to how standards and attitudes have changed over the past 50 years. (This is designed to test your IT skills and to develop a sense of ethical standards and consumer protection). Any reflection upon professional ethics undertaken at present, it is fair to argue, has to take account of two intersecting and conflicting pressures. In the first instance, there are the growing pressures for commercial organisations to act within the boundaries of corporate social responsibility and sustainability. In the second instance, there are the more recent developments to consider, i.e. the pressure for organisations and individuals to return to older protocols of profit maximization in the face of a recessionary downturn. When these two factors are combined, it becomes apparent that there are no simple answers as to what constitutes an appropriate system of professional ethics; in fact, it is likely that the definition would vary widely, depending on who was asked to provide it. There can be no question about the fact that the bar has been raised immeasurably in terms of ethical expectations over the last fifty years. The number of FTSE 100 companies who publish their own standalone corporate responsibility reports continues to rise, indicating that professional ethics must not only be exercised à ¢Ã¢â€š ¬Ã¢â‚¬Å" but be seen to be exercised. (Brewster 2007). In addition, organisations in sectors tinged by ethical lapses have begun to appoint ethics officers, both as a source of in-house expertise, and stakeholder reassurance. (Arnold 2007). Unfortunately, it is also the case that catastrophic ethical failures remain a feature of the corporate landscape, and in fact have become even more damaging. As Rosenthal indicates, these frequently extend to agencies who are responsible for the maintenance of standards. (Rosenthal 2007). However, if the history of ethical attitudes tells us anything of which we may be certain, it is that such attitudes are subject to constant change. As Conroy and Emerson point out, ethical attitudes have followed cyclical patterns, varying slightly from longer term trends, in a manner similar to the economy it self. Within this, attitudes are alternately decreasing, increasing, or changing in terms of their tolerance of un-ethical behaviour. (Conroy and Emerson 2008: p.907). In the present environment, it remains to be seen which side of the ethical equation dominant attitudes will support, i.e., the continual raising of standards, or a return to earlier protocols, such as caveat emptor. As Vickers has argued, it is likely that any new thesis will be followed, inevitably, by an antithesis, in ethical terms. (Vickers 2005). It remains the case that professionals themselves, operating within real organisations and real business pressures, must themselves deliberate between all of the theoretical ethical models available to them. Altman, for example, is clear on the fact that, in terms of Kantian ethics, a corporation, or its officers, should have no other responsibilities than the raising of shareholder value. (Altman 2007: p.261). Fisher and Lovell meanwhile remind us that there a re two basic categories of ethics: the Consequentialist, and the Non-Consequentialist. In the former, the ethical quality of any action is judged through its outcome; in the latter, the action is judged on its own virtues or merits. (Fisher and Lovell, 2006: p.101). If a Consequentialist position is taken, then the individual must decide whether to pursue the general good, such as the best median outcome for the whole of society, or simply a good, such as the best business outcome for their organisation, regardless of the wider societal repercussions. (Fisher and Lovell 2006: p.131) However, if a Non-Consequentialist position is adopted, then the professional must act according to whatever Virtue ethics demands, i.e., judge what is right or wrong from à ¢Ã¢â€š ¬Ã‚ ¦predetermined principles and standardsà ¢Ã¢â€š ¬Ã‚ ¦, regardless of the outcome. (Fisher and Lovell 2006: p.101). Ultimately, each professional practitioner and organisation must balance their own priorities and p erspectives somewhere within this nexus of possibilities, judging what is right for their businesses and society as a whole. 4. A short essay (600 words) titled The Current Property Market in the UK and Europe. Although it can justly claim to be the victim of forces beyond its control, the property industry in the UK and Europe is not entirely blameless with regard to the current malaise of the market. Before the collapse of the US sub-prime market, the European market for mortgage backed securities à ¢Ã¢â€š ¬Ã¢â‚¬Å" dominated by the UK, was starting to see issues with securitisations amongst non-prime creditors, for example in the buy-to-let sector. (Davies 2006). Halifax Bank of Scotland alone successfully marketed  £500 million worth of mortgage-backed bonds during 2008. (Davies and Croft 2008). More realistic lending practices and revenue expectations now appear prevalent: as Johnson reports, the average gross loan-to-value ratio was 24.1 per cent during 2009, down from 29.8 per cent in the previous year. (Johnson 2010). It remains debatable, however, whether property values or industry practices yet reflect a more sustainable outlook across the sector. As many analyst s have indicated, current property prices are being maintained by two intersecting factors: a low rate of supply, and commensurately low interest rates. However, upward adjustments of the latter will, in all probability, place downward pressure on overall prices. (Leunig et al. 2010). Predicting the final trajectory of asking prices in the immediate future will also depend upon what happens to real disposable incomes, and in this respect, the portents are less than healthy. Although asking prices may begin to rise, it may also be the case that, with less money in general circulation, there will be a flattening out of historical trends in price-earnings ratios, and the cost of property will actually fall in real terms. The lenders preferred solution to this kind of impasse, i.e. the offering of ever higher loan to earnings ratios, may no longer be available: even though some banks are again offering six times salary advances, a return to the days of eight-multiple products appe ars unlikely. (Leunig et al. 2010). Meanwhile, large property companies, such as Great Portland Estates, are seeing the effects of a UK recovery gradually appearing on their balance sheets: the latters  £1.2 billion portfolio saw an 8.7 per cent rise during the final three months of 2009, the best quarterly return for the company in three years. This has facilitated an 11.6 per cent growth in net asset value per share to 251 pence, whilst new purchases in the final quarter of 2009 have already accrued a 14.4 per cent increase in value, or 9.5 per cent net of costs. (Thomas 2010). Despite such successes notably in the capital and other select, higher value enclaves, the overall picture is a more complex one, with divergent trends and contrasting future prospects. For example, according to the IPD monthly property index, the UK commercial property market realized total returns of 22.2 per cent during 2009. (Thomas 2010) However, this encouraging statistic masks sig nificant regional and sectoral differences in fortunes, of which the situation in retail property furnishes but one example. According to DTZ, one fifth of all UK shopping developments, with a combined tag of  £10.1 billion, is currently at risk of defaulting on credit agreements, due to a combination of falling earnings and values. (Thomas 2010). In fact, DTZs Mark Williams asserts that a mere one hundred of the UKs eight hundred and forty retail developments could currently be regarded as prime in real estate terms: he attributes this to a huge overhang of poorer quality centres à ¢Ã¢â€š ¬Ã¢â‚¬Å" a legacy of the 1980s boom in development. With their twenty year leases nearing expiry, and outdated facilities becoming less attractive to hard-pressed retailers, their prospects are diminishing. (Thomas 2010) This situation exemplifies a number of similar situations in sub-sectors of the property market, where value and demand differ wildly: as Thomas expresses it in the Financial Times. à ¢Ã¢â€š ¬Ã‚ ¦There is a large and growing gap between the so-called secondary or tertiary real estate that fills the towns and urban areas of the UK, and the prime stock of well-located modern property producing income on a long lease that is the exception, rather than the norm. (Thomas 2010). 5. A short essay (600 words) explaining the basic principles of negotiation à ¢Ã¢â€š ¬Ã¢â‚¬Å" getting to yes. (IT skills again à ¢Ã¢â€š ¬Ã¢â‚¬Å" otherwise hopefully self-explanatory). The idea that there are principles which may be aggregated together to form a best practice within negotiation is one forwarded by commentators such as Fisher, Ury, and Patton in Getting to Yes: Negotiating Agreement without Giving in, (1983). This in turn is predicated upon the ideas of principled negotiation as developed by the Harvard Negotiation Project. (Fisher et al. 1983: p.xii). The collective trope which draws the principles together lays in the idea that purely positional negotiation, i.e. that conducted through the definition and defence of ones own position, is ultimately a poor negotiating technique, and one likely to be counterproductive: à ¢Ã¢â€š ¬Ã‚ ¦As more attention is paid to positions, less attention is devoted to meeting the underlying concerns of the partiesà ¢Ã¢â€š ¬Ã‚ ¦, and consequently, à ¢Ã¢â€š ¬Ã‚ ¦Any agreement reached may reflect a mechanical splitting of the difference between final positions rather than a solution carefully crafted to meet t he legitimate interests of the parties. ((Fisher et al. 1983: p.5). The subsequent principles set out the means to avoid such a scenario throughà ¢Ã¢â€š ¬Ã‚ ¦ à ¢Ã¢â€š ¬Ã‚ ¢ Separating the people from the problem. à ¢Ã¢â€š ¬Ã‚ ¢ Focusing on interests rather than positions. à ¢Ã¢â€š ¬Ã‚ ¢ The invention of options for mutual gain. à ¢Ã¢â€š ¬Ã‚ ¢ The establishment of objective criteria. The separation of the people from the problem does not quite equate to the depersonalizing of the negotiating process: rather, it implies application of the appropriate relationship management skills. In simple terms, à ¢Ã¢â€š ¬Ã‚ ¦If negotiators view themselves as adversaries in a personal face-to-face confrontation, it is difficult to separate their relationship from the substantive problem. (Fisher et al. 1983: p.39). However, the exclusion of personal animosity is only part of this principle. The rest is composed of consciously maintaining the appropriate emotional responses, of und erstanding all of the related perceptions, the development of a relationship, and above all, the establishment of some degree of trust. As J.S. Mill proposed, somebody who knows only their own side of any debate or negotiation, knows little enough of that. (Mill 1843 Ch.2) In other words, achieving a negotiated solution relies upon the understanding of why and how the others position was established. This leads into the next principle of negotiation, i.e. the need to focus on interests, rather than positions. Once the elements which are constructive of the other partys position are understood and disaggregated, it is far more feasible to reach point of mutual agreement. As Fisher et al. point out, à ¢Ã¢â€š ¬Ã‚ ¦Fighting hard on the substantive issues increases the pressure for an effective solution; giving support to the human beings on the other side tends to improve your relationship and to increase the likelihood of reaching agreement. (Fisher et al. 1983: p.57). It is also the case that the clarification of issues is supportive of the next stage in the process, i.e. the invention of options for mutual gain. This involves considering the issues holistically and creatively, assembling all of the objective third party perspectives which might have some bearing, and, where expedient, involving a detached intermediary to assist in the facilitation of the negotiating process. The fruition of these cumulative stages lays in the establishment of objective criteria through which agreement can be reached. By this stage, any emotional stand-off should have been neutralized, so that the participants know they are discussing issues, rather than their respective personalities: moreover, the real issues have been identified, and unhelpful or generalized positions have been deconstructed. Any unnecessary pressure or compulsion should also have been qualified out of the scenario, leaving only the most desirable and achievable solutions to suggest themsel ves. As Fisher et al. conclude, à ¢Ã¢â€š ¬Ã‚ ¦Shifting discussion in a negotiation from the question of what the other side is willing to do to the question of how the matter ought to be decided does not end the argument, nor does it guarantee a favourable result. It does, however, provide a strategy you can vigorously pursue without the high costs of positional bargaining. (Fisher et al. 1983: p.96). Bibliography ADR Now Website, (2009), [online]. Available at https://www.adrnow.org.uk/go/Section_1.html [Accessed 2nd February 2010] Altman, M.C., (2007), The Decomposition of the Corporate Body, Journal of Business Ethics, Vol.74, No.3, pp.253-266, Springer, USA. Arnold, M., Private equity chief in warning on code. , Financial Times, November 18 2007, [online] (Updated 18 Nov 2007). Available at https://www.ft.com/cms/s/0/067ae5a2-9605-11dc-b7ec-0000779fd2ac.html , [Accessed 2nd February 2010]. Brewster, D., Sustainability Report Seeks the Facts, Financial Times, à ¢Ã¢â€š ¬Ã‚ ¨Published: Dec 09, 2007, [online] (Updated 9 Dec 2007) Available at https://search.ft.com/ftArticle?queryText=sustainabilityy=4aje=truex=13id=071209000018ct=0page=2, [Accessed 2nd February 2010]. Conroy, S.J., and Emerson, T.L.N., (2008), Ethical Cycles and Trends: Evidence and Implications, Journal of Business Ethics, vol.81, pp.905-911. Davies, P.J., Traders refuse to be spooked as spreads on mortga ge backed bonds hold steady, Financial Times, 27 Sept 2006, [online], (Updated 27 Sept 2006] Available at https://www.ft.com/cms/s/0/2da00a4e-4e4f-11db-bcbc-0000779e2340.html [Accessed 30th January 2010] Davies, P.J., and Croft, J., HBOS returns to mortgage-backed bond market, Financial Times, 21 May 2008, [online] (Updated 21 May 2008] available at https://www.ft.com/cms/s/0/80a77a04-26b8-11dd-9c95-000077b07658.html Accessed 30th Jan 2010] Fisher, C., and Lovell, A., (2006), Business Ethics and Values: Individual Corporate and International Perspectives, 2nd Edition, FT/ Prentice Hall, London. Fisher R., and Ury, W., and Patton, B., (1983), Getting to Yes: Negotiating Agreement without Giving in, Hutchinson, London. Freedman, P., and Steele, K., (1998), Interpreting and Enforcing Commercial Leases, Jordan, Bristol. Johnson, S., UK property funds up 10 per cent, Financial Times, 24 Jan 2010, [online] (Updated 24 Jan 2010] Available at https://financial-times.org/ [Accessed 30th January 2010] Lamont, C., Seifert, A., and Stacey, M., (2005), Lease Renewal, RICS Books, Coventry. Leunig, et al., Property: Are residential property prices now fairly valued? Financial Times, 4 Jan 2010, [online] (Updated 4 Jan 2010) Available at https://financial-times.org/ [Accessed 30th January 2010] Mackie K., Miles, D., Marsh, W., and Allen, T., (2007), The ADR practice guide: commercial dispute resolution Tottel, Haywards Heath. Mill, J.S., (1843), On Liberty, Penguin, London. Mintzberg, H., Ahlstrand, B., and Lampel, J., (1998), Strategy Safari: The Complete Guide Through the Wilds of Strategic Management, Prentice Hall, London. Residential Property Tribunal Service Website, (2009), [online]. Available at https://www.rpts.gov.uk/our_services/services.htm [Accessed 30th January 2010] Rosenthal, L., LETTER TO THE EDITOR, Ratings agencies need to learn lessons from Enron, Financial Times 27 Jun 2007, [online]. (Updated 27 Jun 2007) Availab le at https://search.ft.com/ftArticle?queryText=enrony=2aje=truex=10id=070627000938ct=0page=3 [Accessed 3rd February 2010] Roubini, N., Light at the end of the tunnel after a year of stagnation, Financial Times, 23rd Dec 2008, [online]. (Updated 23 Dec 2008) Available at https://www.ft.com/cms/s/0/745b4f46-d090-11dd-ae00-000077b07658.html [Accessed 2nd February 2010] Thomas, D., Great Portland underlines property market recovery, Financial Times, 21 Jan 2010, [online]. (Updated 21 Jan 2010) Available at https://financial-times.org/ [viewed 2nd February 2010] Thomas, D., Failing properties pose danger for market, Financial Times, 25 Jan 2010, [online]. (Updated 25 Jan 2010). Available at https://financial-times.org/ [Accessed 2nd February 2010]. Vickers, M.A., (2005), Business Ethics and the HR Role: Past, Present, and Future, in Human Resource Planning, vol. 28, [online]. Available at https://www.questia.com/googleScholar.qst?docId=5009356449, [Accessed 2nd February 2010]

Red King Crab Facts and Identification

They are the biggest and most sought-after shellfish in Alaska. What are they? Red king crab. Red king crab (Paralithodes camtschaticus)  is one of several king crab species. They entice fishers and seafood consumers with their snow-white (edged by red), flavorful meat. If youre a fan of reality TV, you might be familiar with red king crab, as they are one of two species (along with snow, or opilio crab) fished on Deadliest Catch. What Do King Crabs Look Like? As youd probably guess from the name, red king crab have a reddish carapace that can vary from brownish to dark red or burgundy. They are covered in sharp spines. These are the largest crab in Alaska. Since they dont expend as much energy in reproduction, males can grow much larger than females. Females can weigh up to about 10.5 pounds. The largest male on record weighed 24 pounds and had a leg span of about 5 feet.   These crabs have three pairs of legs used for walking and two claws. One claw is larger than the other and is used for crushing prey.   While it may not be apparent, these crabs are descended from hermit crab ancestors. Like hermit crabs, a red king crabs back end is twisted to one side (more drastically in hermit crabs, so they can fit into the gastropod shells that provide their shelter), they have one claw larger than the other, and their walking legs all point backward.   How Do You Distinguish Male King Crabs from Females? How do you tell males from females? There is one easy way: To keep crab populations healthy, only male red king crabs can be harvested, so if youre eating a king crab, it is most likely a male. In addition to size differences, males can be distinguished from females by the flap on their underside, which is triangular in males and rounded in females (this flap is larger in females because it is used to carry eggs).   Classification Kingdom: AnimaliaPhylum: ArthropodaSubphylum: CrustaceaClass: MalacostracaOrder: DecapodaFamily: LithodidaeGenus: ParalithodesSpecies: P. camtschaticus Where Do Red King Crabs Live? Red king crabs are a cold water species native to the Pacific Ocean, although they were also intentionally introduced into the Barents Sea 200. In the Pacific Ocean, they are found from Alaska to British Columbia and Russia to Japan. They are usually found in waters less than 650 feet deep.   What Do Red King Crabs Eat? Red king crabs feed on a variety of organisms, including algae, worms, bivalves (e.g., clams and mussels), barnacles, fish, echinoderms (sea stars, brittle stars, sand dollars) and even other crabs.   How Do Red King Crabs Reproduce? Red king crabs reproduce sexually, with internal fertilization. Mating occurs in shallow water. Depending upon their size, females can produce between 50,000 and 500,000 eggs. During mating, males grasp the female and fertilize the eggs, which she carries on her abdominal flap for 11-12 months before they hatch. Once they hatch, the red king crab larvae look similar to shrimp.  They can swim, but are largely at the mercy of tides and currents. They go through several molts over 2-3 months and then metamorphose into a glaucothoe, which settles to the ocean bottom and metamorphoses into a crab that spends the rest of its life on the ocean bottom. As they grow, red king crabs molt, which means they lose their old shell and form a new one.  During its first year, a red king crab will molt up to five times.  These crabs are sexually mature at about 7 years old. These crabs are estimated to live up to 20-30 years.   Conservation, Human Uses, and the Famous Crab Fishery After sockeye salmon, red king crab is the most valuable fishery in Alaska.  The crab meat is eaten as crab legs (e.g., with drawn butter), sushi, or in a variety of other dishes.   Red king  crabs are caught in heavy metal pots in a fishery that is famous for its dangerous seas and weather. To read more about red king crab fishing, click here.   Deadliest Catch—a crustacean lovers favorite reality series—tells the harrowing at-sea adventures of the captains and crew on  6 boats. But there were 63 boats in the Bristol Bay red king crab fishery in 2014. These boats caught the 9 million pound quota of crab in about  four weeks. Much of that crab is shipped to Japan.   As for the U.S., it is likely the red king crab you eat isnt caught by the fishermen on the Deadliest Catch  boats. According to  FishChoice.com, in 2013, 80 percent  of the red king crab sold in the U.S. was caught in Russia.   Threats to Red King Crab Populations Although catches of red king crab are steady at the moment,  recent reports  show they are vulnerable to  ocean acidification, a lowering of the oceans pH, which makes it difficult for crabs and other organisms to form their exoskeleton.   Sources Ahyong, S. 2014.  Ã‚  (Tilesius, 1815)Paralithodes camtschaticus. Accessed through: World Register of Marine Species.Alaska Department of Fish and Game.  Red King Crab  (). Accessed January 30, 2015.  Paralithodes camtschaticusAlaskan King Crab Company. How to Cook and Prepare Alaskan King Crab Legs. Accessed January 30, 2015.  Carroll, S. B. 2011. A Lesson of Genealogy: Looks Can Be Deceiving. New York Times. Accessed January 30, 2015.  Christie, L. 2012. Deadliest Catch Not So Deadly Anymore. CNN Money. Accessed January 30, 2015.NOAA FishWatch. Red King Crab.  Accessed January 30, 2015.  Soley, S. 2013.  From Ocean to Plate: The Life of the Red King Crab. EarthZine. Accessed January 30, 2015.Stevens, B. J. Adaptations of Crabs to Life in the Deep Sea. NOAA Ocean Explorer. Accessed January 30, 2015.  Welch, L.  Fish Factor: Strong 2015 forecasts for pollock, Bristol Bay salmon. Alaska Journal of Commerce. Accessed January 30, 2015.

Gay Marriage Is The Black Lives Matter Essay - 2087 Words

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Crude Distillation Unit Free Essays

string(39) " and requires a temperature of 354 oC\." A REPORT ON CDU: HEAT EXCHANGE INTEGRATION BY Mudit 2010A1PS349P Amanpreet Singh 2010B4A1356P Rishu Gupta 2010A1PS401P AT IOCL REFINERY, GUWAHATI A Practice School-I station of BIRLA INSTITUTE OF TECHNOLOGY SCIENCE, PILANI July, 2012 PREFACE We feel immense pleasure in presenting before you this final report on our PS-1 program IOCL Guwahati refinery. This report encompasses a comprehensive discussion of what we learnt on this program. The report starts with a brief introduction about the organization i. We will write a custom essay sample on Crude Distillation Unit or any similar topic only for you Order Now e. IOCL Guwahati refinery. We have kept discussion in this section brief to focus more on our Project ‘Heat exchange and integration in CDU ’. The main report is divided into 4 sections. To start with, the first Section is a basic introduction to Crude distillation unit, its process and products. Heat exchange is among the most important activity for crude distillation units. The 2nd part of the report focuses on this heat exchange process occurring in the crude distillation unit of Guwahati refinery. Necessary data regarding all the heat exchangers has been provided in a tabular manner to make understanding easier. The concept of critical heat exchanger is introduced subsequently in the 3rd section along with the case study of some important heat exchangers of the process. Heat duty other calculations presented in this section for heat exchangers are clearly explained in step by step manner along with formulas used. Through these calculations we have tried to analyze whether these exchangers are working efficiently. In the Last part of the report we have given an introduction to ‘heat integration’ one of the most important tool for increasing energy efficiency of a process. Points discussed about heat integration in this section are: Meaning, Importance, its need in CDU, Tools. We have concluded this part with an example of heat integration done in 2010 in pre-heat train of CDU, showing how it helped saving energy increasing efficiency. A final conclusion and glossary are provided to sum up the report. We hope you have a good time reading this report and find it informative and useful. Mudit, Amanpreet Rishu Birla Institute of Technology Science Pilani 333031 2 ACKOWLEDGEMENT A comprehensive report always requires the goodwill, encouragement, guidance and support of many people so we would like to start by thanking our college BITS pilani for initiating program like ps-1 thereby giving us the opportunities to visit real time industries and learn by working on hand in organizations as big as IOCL. Our sincere thanks to Mr. B K Das, CPNM and Mr. P S Sonowal for assigning us this important project on heat integration in refinery and getting us in contact with the required person in each unit. Without their help this whole program would not have been possible. We are indebted by the constant support and mentoring provided by Mr. Vijay Kumar, TS for the preparation of this report. Also, we take this opportunity to thank all the chief engineers, and workers we have met in different units who have received us with open hearts and helped us in learning the vast array of knowledge that a refinery holds. Mr. E Edmund of CDU, Mr. A. Bairagi of OMS are just the few of these names with whom we shared numerous informative talks which finally went into the preparation of this report. We also express our deep sense of gratitude to IOCL administration for providing us with necessary data nd making our stay a pleasant one. Thanks to our families friends for their constant support and encouragement throughout the period of preparation of this report. It goes without saying that we are sincerely grateful to our instructor, Mr. Prasantha G for coordinating this ps-1 program and giving us opportunity to present before him this report. Thank you all Birla I nstitute of Technology Science Pilani 333031 3 TABLE OF CONTENTS S No. Topic Page No. Preface Acknowledgement List of Illustrations Abstract 2 3 5 1. 1 1. 2 1. 3 Introduction IOCL Guwahati refinery Production Units of Guwahati refinery 6 7 8 9 2. 1 Crude Distillation Unit CDU : Process Description 11 3. 1 3. 2 3. 3 CDU Pre-heat Train (Heat exchange Process) Introduction Shell tube Heat exchanger Pre-heat train : Description 15 16 17 Heat Exchanger Performance Calculation Critical heat exchangers Performance analysis: Examples ? S-25A/B ? S-11C ? S-23A/B 22 23 23 25 27 Heat Integration Heat Integration : Introduction Heat Integration in CDU ? Need for heat integration in CDU ? Heat integration in Guwahati Refinery ? Example from pre-heat train 30 32 32 32 33 Conclusions References Bibliography Glossary 35 36 37 38 4. 1 4. 2 5. 1 5. 2 Birla Institute of Technology Science Pilani 333031 4 LIST OF ILLUSTRATIONS ILLUSTRATION NO. DESCRIPTION 1. 2. 1 1. 3. 1 IOCL Indian market share Table showing Production units 2. 1. 1 2. 1. 2 CDU flow diagram Table Showing CDU product properties 3. 2. 1 3. 3. 1 3. 3. 2 Types of Shell Tube heat exchanger Pre-heat train flow diagram Table Showing cold section heat exchangers Table Showing mid section heat exchangers Table Showing hot section heat exchangers 3. 3. 3 3. 3. 4 4. 2. 1 – 4. 2. 3 4. 2. 4 – 4. 2. 6 4. 2. 7 – 4. 2. 7 5. 1. 1 5. 2. 1 5. 2. 2 Properties, Design data, Practical data of S-25A/B Properties, Design data, Practical data of S-11C Properties, Design data, Practical data of S-23A/B Steps of Heat Integration Heat integration in Pre-heat train S-11/c before after heat integration Birla Institute of Technology Science Pilani 333031 5 ABSTRACT Title of the Project: CDU: HEAT EXCHANGE INTEGRATION Key Words: Crude distillation, Heat exchange, Heat integration, CDU-Pre heat train Project Areas: Heat exchange, Process design optimization, Energy Abstract: In this work is on Crude distillation unit in a refinery discusses the heat exchange process in it and introduction of the concept of heat integration which is of wide importance in CDU. CDU is used for crude fractionation and requires a temperature of 354 oC. You read "Crude Distillation Unit" in category "Papers" To increase the temperature of crude 2 step process is used; heat exchange with product streams furnace. In the shell tube type heat exchangers of Guwahati refinery Low temperature crude exchanges heat with high temperature streams of SRGO, RCO etc. in 3 stages(cold , mid, hot). The performance of some of these heat exchangers have a major impact on production and are classified as ‘Critical’ on the basis of different criteria like frequent fouling, Large surface area. Calculation of heat duty, LMTD of some of these heat exchangers(s/15, S/23a-b,s-24) is done using design practical data to check whether they are working efficiently as compared to design. Heat integration is an important concept to increase energy efficiency of process through heat recovery. Tools like pinch analysis are used in high energy demanding units like CDU to optimize the Heat Exchanger Network for maximum efficiency. Analysis of past heat integration done in Pre heat train of CDU is taken as an example for analysis. Signature(s) of Students(s) Date Signature of PS Faculty Date Birla Institute of Technology Science Pilani 333031 6 1. 1 INTRODUCTION This Report is an analysis of the one of the most key elements of any crude distillation unit i. e. ‘Heat Exchange’ ‘Heat integration’. The report is based on Work in CDU of Guwahati refinery. Crude distillation units are used for the fractionation of crude into more valuable products using their difference in boiling points. Increase in temp for distillation us achieved in 2 steps; first step is the heat exchange of crude with product streams at high temperatures. In the next step a furnace is used to further elevate the temperature. Our main point of discussion in this report is the first step of heat exchange called the Pre-heat train. The pre-heat train consists of 3 sections: Cold, Mid hot. The purpose of each section is to recover heat from hot product stream of RCO, SRGO etc and supply it to crude through a shell-tube type heat exchanger. The details about various heat exchanger used in process are presented in the report. Performance of some heat exchanger is more critical on overall heat exchange than others; these heat exchangers are classified as ‘Critical heat exchangers’. Constant monitoring of efficiency of these heat exchangers needs to be done. As Example calculations like heat duty, LMTD is done in this report for some of these critical heat exchangers (S-11C, S-23A/B) to check their efficiency. Crude distillation is an energy intensive process. With increasing oil costs, the focus is to maximize energy recovery. One way to do this is ‘heat integration’ which is a technique to design a process to minimise energy consumption. Tools like pinch analysis are used for obtain an optimized heat exchanger network for heat integration in CDU. The retrofitting of the HEN in CDU is taken as case study in report to realize importance of heat integration. Meaning of all the key terms used in the report can be found in the Glossary. Necessary data used in the report has been obtained through manuals officials of Guwahati refinery. Birla Institute of Technology Science Pilani 333031 7 1. 2 IOCL GUWAHATI REFINERY ? IOCL Indian Oil Corporation limited is largest state owned company in terms of revenue having ‘Maharatna’ status. It is ranked 98th in the Fortune global 500 listing. It’s biggest player in Indian downstream oil Gas sector and operates10 of India’s 21 refineries with refining capacity of 65. 7 MMTPA. Major ones are Panipat, Mathura, Guwahati, Gujrat, Haldia etc. Its products are Petrol, Diesel, LPG (Indane), ATF, lubricants, Naphtha, Kerosene etc. (1. 2. 1) Sector (India) IOCL Share Petroleum products 49% Refining capacity 37% Downstream pipelines 67% ? Guwahati Refinery Guwahati refinery is the first public sector refinery of India commissioned in 1962. It had an initial capacity of 0. 75 MMTPA which was extended to 1 MMTPA in 1986. Guwahati Refinery receives the raw crude from Oil India Limited has a product line to Siliguri. Final products of Guwahati Refinery are Motor spirit (MS), ATF, Kerosene, LPG, Diesels, Petroleum Coke Sulphur. It’s an environmentally Conscious refinery with modern effluent treatment facilities, Stack gas monitoring, Products with strict environmental specifications like BS-3 BS-4. Birla Institute of Technology Science Pilani 333031 8 1. 3 PRODUCTION UNITS ? Shown below in the table are the various production units of Guwahati refinery along with their use, feed products(1. 3. 1): Unit Purpose Feed Output CDU Separation of Crude into useful products by distillation. Raw Crude LPG , Naphtha, RCO, Kero-1 2 DCU Thermal Cracking to obtain useful products from higher ends RCO CK, CGO, CFO, RFO and RPC HGU Production of hydrogen Light Naphtha (LN) Hydrogen INDMAX FCC unit for maximizing LPG production from residual stocks. CFO, CK, RCO LPG Gasoline Quality improvement of Diesel, ATF by removing sulphur. SRGO, KERO 1 2 BS 3 Diesel, ATF, SKO HDT Improving Octane No. of MS by Hydrotreating Isomerization LN Isomerate (MS) HDT off gases Elemental Sulphur _ _ Waste water Effluent free water MSQU Recovering Sulphur SRU OM ETP Crude product storage, Pumping blending Treatment of waste water to remove oil and suspended solids Birla Institute of Technology Science Pilani 333031 9 CRUDE DISTILLATION UNIT Birla Institute of Technology Science Pilani 333031 10 2 CDU: Process Description INTRODUCTION Crude distillation unit or CDU in short is first most important unit for any refinery. It’s called the ‘Mother unit’ as its products forms the feed of other units. CDU receives its crude from OM (oil movement and supply section) where it is supplied by Oil India Ltd from upper Assam oil fields. Incoming crude has following properties (2. 1. 1): Property Density at 15 oC Water content Salt content(ppm) Sulphur content(ppm) Value 0. 8735 2. 05% 8. 7 0. 29 CDU then stripes the crude into various products like kero1, kero2, reduced crude oil, LPG, heavy gasoline and light gasoline using the distillation principle of difference in boiling points. KEY FACTS ? ? ? Installed in 1962. Revamped and modernized in 1986 2000. Capacity of 1MMTPA but currently processing 1. 3 MMTPA It’s an Atmospheric distillation unit (ATU) PROCESS DESCRIPTION A brief description of the different processes taking place in CDU is given on next page (2. 1. 2): 1. Pre heating train before Desalter: Crude is pumped by pumps P1/1A at a pressure of 15 kg/cm2 through a series of heat exchangers where its temperature is elevated to 130o C. Crude is gaining heat in these exchangers from pre fractionated overhead vapours(in s-26), RCO( in s-29), SR Kero1 etc. Birla Institute of Technology Science Pilani 333031 11 2. Desalter: Demulsifier mixed crude is fed at 130 o C to Desalter (v-101) where it is mixed with water through a mixing valve. The salt in crude dissolves in water and separated from the oil. Salt free crude on the other hand is pumped to Pre-topping column (CL-1) though 2 safety valves. 3. Pre-topping Column (CL-1): The average temperature of crude before entering pretopping column is 238 oC (achieved through heat exchange). The purpose of this column is to remove the straight run (SR) light gasoline and LPG from overhead and reduce the load on the main fractionating column. Shown below is the Flow diagram of CDU(2. 1. 1): 4. Atmospheric furnace (C 1 A): the crude coming from CL-1 bottom at 246 oC is fed to furnace. Furnace is fired by fuel oil (FO), Fuel gas (FG) or a mix of both supplied by DCU. The crude coming out of the furnace has a temperature of around 354 oC and goes to the flash zone of main fractionators’ column. 5. Main Fractionators column (CL-2): It’s the most important part of CDU. Cl-2 is where the actual distillation is taking place crude is separated into different products of different cut. Stripping stream enters at the bottom. The various subsystems of CL-1 are: Birla Institute of Technology Science Pilani 333031 12 a) Overhead system: The overhead of the column of the water and the Straight rum Heavy Gasoline (SRHG) are separated. b) Stripper column: A stripping column (CL-3) is attached to the main fractionating column . Its function is to strip apart (separate) kero1, kero 2 and straight run gas oil coming from main fractionating column. ) CL-2 Bottom Section: The remaining crude oil called as the reduced crude oil (RCO) comes out of the bottom of CL-2. RCO forms the feed of DCU 6. Light Gasoline /Heavy Gasoline Processing System: Un-stabilized light gasoline from CDU pre-toping column is stabilized in the stabilizer where LPG is recovered from it while heavy gasoline is spl it in the two naphtha splitter to separate LN (Light Naphtha), RN (Reformer Naphtha) and HN (Heavy Naphtha). The table below shows properties of the Products formed in the CDU(2. 1. 2): LN TBP cut HN Kero 1 Kero 2 SRGO RCO 65-135 135-165 165-190 190-300 300-370 370+ 11. 27 4. 90 8. 16 12. 11 22. 16 9. 7 0. 731 0. 786 0. 806 0. 866 0. 866 0. 9542 range Yield (% of crude) Density Birla Institute of Technology Science Pilani 333031 13 CDU PRE-HEAT TRAIN (HEAT EXCHANGE IN CDU) Birla Institute of Technology Science Pilani 333031 14 3. 1 INTRODUCTION As we have seen the temperature of the Crude oil needs to increase to 354 oC in CDU. This section is a discussion on how this is achieved. Why Crude needs to be heated in CDU? The various components of crude oil have different sizes, weights and boiling temperatures. Crude Distillation Unit is used to strip this crude into various products using the difference in their boiling points. Therefore for distillation to take place the temperature of the Crude has to be elevated to around 354 oC so that all the fractions of crude oil can vaporize and get separated. How Temperature of Crude is increased in CDU? The Temperature increase of Crude oil consists of 2 major steps: 1. A 3 Stage Heat exchange (called CDU pre-heat train) of crude with product streams at high temperatures using shell tube type heat exchangers. This step results in crude being supplied at 246 oC (elevated from ambient) to the next step ‘The atmospheric Furnace’. 2. The atmospheric furnace (C-1A) is then used to further elevate the temperature. Modes of heat transfer in furnace are both convective and radiative the crude coming out of the furnace has a temperature of around 354 oC and goes to the flash zone of main distillation column (CL-2). Furnace alone is not used because it would to too expensive and Energy consuming. By exchanging heat with products, the pre-heat train is serving twin purpose; The Crude is being heated at the same the temperatures of product streams of SRGO, RCO, KERO is brought down which was needed for their storage. This heat would have otherwise been wasted. Our point of discussion in this report is the First step i. e. The Heat exchanger Network’ which we will now study in detail. Birla Institute of Technology Science Pilani 333031 15 3. 2 SHELL TUBE HEAT EXCHANGER The Pre heat train uses shell tube type heat exchager for heat transfer. ? It consist of two main things as its name implies Shell Tubes ? The shell is a large vessel with a number of tubes inside it. ? The principle of oper ation: Two fluids of different temperatures are brought into close contact but they are not mixing with each other. One fluid runs through the tubes, and another fluid flows over the tubes (through the shell) to transfer heat between the two fluids. The temperature of the two fluids will tend to equalize. The heat is simply exchanged from one fluid to the other and vice versa. No energy is added or removed. Common types of shell and tube exchangers: Birla Institute of Technology Science Pilani 333031 16 3. 3 PRE-HEAT TRAIN: Description Our point of discussion in this report is first step of the 2 stages used for raising the temperature of crude i. e. the Heat exchanger network in which heat transfer occurs between crude and product streams of RCO, SRGO, and Kero 1. This network is also called the CDU pre-heat train. In this process the temperature of the crude is elevated form ambient conditions at which it is supplied from OM to 246oC. The heat needed for this is coming from the product streams which are at high temperatures. Dual purpose is served in this way: heating of crude as well as the cooling of product streams (needed for their storage). The pre-heat train is divided into three sections on the basis of temperature of crude flowing through them: 1. COLD section 2. MID section 3. HOT Section Shown below is the flow diagram of the CDU pre heat train (3. 3. 1): Birla Institute of Technology Science Pilani 333031 17 1. Cold Section (before Desalter): The crude from battery limit is pumped by pumps P-1/1A at about 15. 8 Kg/cm2 through a preheat train where it is heated to a temperature of 130 ? C before entering the Desalter (V-101). The following table shows the shell side tube side streams of all exchanger in this section along with their inlet-outlet temperatures (3. 3. 2):Exchanger Service Shell Tube Total Surface area Heat Duty Temperature shell tube I O I O S-26 Gasoline Crude 300 x 1 2. 11 107 90 40 65 S-29 RCO Crude 171 x 1 0. 47 116 100 54 60. 3 S-12A Crude Kero 2 148 x 1 0. 92 60. 3 72. 6 130 82 S-27A/B Crude SRGO 183 x 2 1. 39 72. 5 0. 3 173 85 S-7 Kero 2 Crude 93 x1 1. 48 199 130 90. 3 109 S-11A/B RCO Crude 134 x 3 1. 49 165 115 109 122 2. Mid Section (Between Desalter and pre-topping column): The crude from the Desalter is pumped by pump P-21 A/B and divided equally into 2 streams (Train A B) for further heating before entering the Pre-topping column. P-21A/B? Train â€Å"A†: S -24, S-9A, S-23A/B, S-9B/C, S-22 CL-1 Train â€Å"B†: S-4A/B, S-12B, S-25A/B The crude in train A is preheated by hot-streams of SR Gas Oil (in S-24), RCO (in S-9A, S-23A/B), SR Gas Oil (in S-9B/C), RCO (in S-22) to about 236 ? C. While the crude in Birla Institute of Technology Science Pilani 333031 18 train B is preheated by SR kero circulating Reflux (CR) (in S-4A/B, S-12B) and RCO (in S-25A/B) to about 240 ? C. Desalted crude from both Train A and Train B streams are combined before entering the pre-topping column. Mixed preheat temperature achievable is around 238 ? C at which it is fed to pre-topping Column. Below is the table showing heat exchangers of mid section (3. 3. 3) Exchanger Shell Service Tube Total area Surface Heat Duty Temperature oC Shell Tube I S-9A Desalted Crude RCO S-23A/B RCO S-9B/C SRGO S-22 RCO S-4A/B Desalted Crude Desalted Crude RCO S-24 S-12B S-25A/B O I O SRGO – 0. 0 122 138 214 173 Desalted Crude Desalted Crude Desalted Crude Desalted Crude Kero CR 149 x 1 0. 61 184 195 138 152 148 x 2 1. 93 241 184 153 195 82 x 2 0. 54 272 214 195 218 149 x 1 0. 91 320 296 218 236 148 x 2 1. 67 122 161 190 164 Kero CR 148 x 2 1. 8 161 198 216 190 Desalted Crude 113. 15 x 2 2. 0 297 283 228 223 3. Hot Section (At CL-1 Bottom): The topped crude from CL-1 bottoms is pumped by pumps P-2/2A to exchangers S16/S-9D in series, where it is heated by SR Gas Oil Circulatory reflux. It then passes to exchanger number S-11C and further to S-21 where it is heated by Reduced Crude Oil (RCO) to about 246? C. At this Temperature pre topped crude enters Atmospheric furnace (C-1A). The table on next page gives details about every heat exchanger in this section (3. 3. 4). Birla Institute of Technology Science Pilani 333031 19 Exchanger Service Shell Total area Surface Heat Duty Tube Temperature oC Shell Tube I S-16/9D SRGO CR S-21 RCO S-11C RCO Skimmed crude Skimmed crude Skimmed crude O I O 186 x 2 2. 16 291 250 197 257 175 x 1 0. 61 336 320 239 246 134 x 3 1. 49 336 320 239 246 Birla Institute of Technology Science Pilani 333031 20 HEAT EXCHANGER PERFORMANCE CALCULATION Birla Institute of Technology Science Pilani 333031 21 4. 1 CRITICAL HEAT EXCHANGER The critical heat exchangers are identified as the ones whose performance has a major impact on heat exchange rate, Production rate, product quality or environmental and health issues. Problem or inefficiency in any of the critical exchanger has a severe effect on overall heat exchange process occurring in the crude distillation unit. The engineers need to see that these exchangers are working efficiently for smooth running of the process (Though efficiency monitoring is important for every exchanger but the most attention has to be paid for Critical heat exchangers). Criteria for Classification: 1. Fouling: is accumulation of unwanted material of heat exchanger surface is called fouling. Fouling is inevitable in heat exchanger but certain heat exchangers are more prone to fouling than others. These exchangers foul in short intervals and need to be cleaned frequently. Their regular maintenance is very necessary for the heat exchange process. E. g. is S-11/C in hot section is prone to frequent fouling. 2. Large surface area: Some heat exchanger have a very large heat transfer area which means they have a large contribution in total heat exchange taking place. Their inefficiency or by-passing them would have a vital effect of final crude temperature. For example S-23 A/B in the mid section of heat exchanger trains. 3. Single heat exchanger in line: If a heat exchanger is single heat exchanger in the line like the one used in circulating reflux then it cannot be stopped or by-passed. For any maintenance work on them the whole unit has to shut down. Example is S16/9D. In next section the basic performance measurement calculations like heat, Duty, LMTD, Heat transfer coefficient is done for some of these critical heat exchangers. Birla Institute of Technology Science Pilani 333031 22 4. 2 PERFORMANCE ANALYSIS: Examples This section analyzes the performances of some main heat exchangers of pre-heat train through calculation of simple performance measurement tools like Heat duty, LMTD Heat transfer coefficient. The definitions formulas for these tools can be found in glossary at the end of the report. 1) S-25 A/B ? Type: Shell tube ? Section: Mid ? Properties: Exchanger no. S-25A/B Service Shell No. of passes Shell Tube Tube RCO Desalted Crude 1 2 Total Surface area Heat Sq. M x no. of Duty element 113. 15 x 2 2. 0 (4. 2. 1) ? Design Data: Shell 54554 55454 296 241 (I) (O) 49. (uncorrected) Total flow (Kg/h) Operating temperature (? C) LMTD (? C) Tube 77586 77586 197. 7 240. 5 (I) (O) 47. 1 (corrected) (4. 2. 2) ? Practical data: Mass flow rate (RCO) = 59187. 5 Kg/hr S-25A/B Service Temperature,  °C Shell Tube Post M Shell side I 297. 5 O 283. 7 Tube side I O 231. 9 245 Nov 11 Exchanger No. 263 253 198 RCO crude 203 (4. 2. 3) ? Calculations: 1 . Heat Duty (design): M*Cp*(Ti –To) = 2002813. 7 Kcal/hr Birla Institute of Technology Science Pilani 333031 23 2. Heat Duty (practical): 559336 Kcal/hr 3. Correction factor for LMTD (practical): 1. 01 4. LMTD (practical): 52. 12 (uncorrected), 51. 7(corrected) ? Observation The practical heat transfer of 559336 Kcal/hr is much lower than the design heat duty of 2002813. 7 Kcal/hr. ? Conclusions 1. The exchanger is not working efficiently 2. Due to fouling the temperature difference across the crude side is low which is reducing the total heat exchange in the exchanger. Birla Institute of Technology Science Pilani 333031 24 2) S-11/C ? Type: Shell tube ? Section: Hot ? Properties: It’s a critical heat exchanger because of the frequent fouling Service Exchanger no. Shell Tube S-11C RCO PreDesalter No. of passes Shell Tube 1 2 Total Surface area Sq. m x no. of lement 134 x 3 Heat Duty 1. 49 (4. 2. 4) ? Design data: Shell Tube Total flow (Kg/h) 54554 55454 155171 Opera ting temperature (? C) 336 (I) 320 (O) 239 (I) LMTD (? C) _ 1551 71 246 (O) _ (4. 2. 5) ? Practical data: Mass flow rate: 59871. 5 Exchanger No. S-11C Service Shell Tube RCO Skimmed Crude Post M Nov ‘11 Temperature,  °C Shell side Tube side I O I O 327 315 257. 8 263 330. 2 275 231 255 (4. 2. 6) Birla Institute of Technology Science Pilani 333031 25 ? Calculations: 1. Heat Duty (design): M*Cp*(Ti –To) = 6295320 Kcal/hr 2. Heat Duty (practical): 597382. 7 Kcal/hr 3. Correction factor for LMTD(practical) = 0. 75 4. LMTD (practical): 82. 84 (uncorrected), 80. 79(corrected) ? Observations: Heat transfer at present is 597382. 7 Kcal/hr which is satisfactory as compared to design heat transfer of 6295320. ? Conclusions: The present performance of the heat exchanger is satisfactory as compared to design. This little variation in the design heat duty and practical heat duty is due to variation in value of Cp of RCO with temperature. Birla Institute of Technology Science Pil ani 333031 26 3) S-23A/B ? Type : Shell Tube ? Section: Mid (Train A) ? Properties: It is an critical heat exchager becase of its large heat transfer area Service Total Surface area No. of passes Shell Tube Shell Tube (Sq. m x no. of element) RCO Desalted Crude 1 2 148 x 2 Heat Duty 1. 93 (4. 2. 7) ? Design Data: Property Shell Tube Total Flow (Kg/h) Temperature (? C) I 54554 241. 0 O 54554 184. 0 I 77585 152. 70 O 77585 195. 0 Specific Heat (Kcal/kg-? C) 0. 646 0. 597 0. 566 0. 617 LMTD (? C) 38. 21 35. 6 (4. 2. 8) ? Practical data: Mass flow rate (RCO) = 59187. 5 Kg/hr Temperature  °C Service Shell RCO Tube crude Shell side Post M Nov ‘11 Tube side I 260. 2 O 230 I 145. 7 O 178. 8 253 230 142 160 (4. 2. 9) Birla Institute of Technology Science Pilani 333031 27 Calculations: 1. Heat Duty (design): M*Cp*(Ti –To) = 1932602. 7 Kcal/hr 2. Heat Duty (practical): 1161000. 7 Kcal/hr 3. Correction factor: 4. LMTD (practical): (uncorrected), (corrected) ? Observations The practical heat transfer of 1161000. 7 Kcal/hr is much lower than the design heat duty of 1932602. 7. The value of LMTD on the other hand is actually higher in case of practical situation ? Conclusions The heat exchanger is not working efficiently. Due to fouling the temperature difference across the crude side is low which is reducing the total heat exchange in the exchanger even after having a high LMTD value. Birla Institute of Technology Science Pilani 333031 28 HEAT INTEGRATION Birla Institute of Technology Science Pilani 333031 29 4. 1 HEAT INTEGRATION: Introduction In Today’s process industries like Guwahati refinery increasing energy efficiency is of prime importance. With the rising costs of input like crude, power the process has to be designed to have maximum energy recovery so as to reduce the costs. Heat integration is one of the ways to achieve this. 1. MEANING Heat integration is technique for designing a process to minimise energy consumption and maximise heat recovery. Its part of the broader term ‘Process integration’ which is a holistic approach to process design which emphasizes the unity of the process and considers the interactions between different unit operations from the outset, rather than optimising them separately. 2. NEED FOR HEAT INTEGRATION Heat integration can lead to substantial reduction in the energy requirements of a process thus saving costs. It’s the answer to following questions: ? Are the existing processes as energy efficient as they should be? ? What changes can be made to increase energy efficiency without incurring any costs? What is the most important utility mix for the process? What investments can be made to increase energy efficiency? ? How to put energy efficiency other targets like emission reduction, increasing plant capacity into one coherent strategic plan? 3. TOOLS FOR HEAT INTEGRATION ? Pinch Analysis The term pinch technology was introduced by Linnhoff to represent a set of thermodynamics based tools that that guarantee minimum energy levels in design of heat exchanger networks. Pinch Technology provides a systematic methodology for energy saving in processes total sites. Its prime objective is to provide energy saving by better process heat integration. Here are some of its key features: Birla Institute of Technology Science Pilani 333031 30 1. Based on the first and second law of thermodynamics. 2. Pinch analysis is applicable for both new design as well as the retrofit systems. 3. It was developed for crude distillation systems but is now applicable to large number of process industries. 4. In addition to energy conservation Pinch technology provides general improvements 5. Some famous Pinch softwares are Pinch ExpressTM, Aspen PinchTM SuperTargetTM ? Retrofit analysis Retrofit analysis is done to in old process processes to see what modifications suggested by pinch analysis are most suitable for the project. It looks into the optimization of the process through energy capital trade off. In oil refining, retrofit designs are far more common than grass root applications. The retrofit targets are preferably achieved by re-using existing equipment more efficiently rather than installing new equipments and incurring new costs. 4. STEPS IN HEAT INTEGRATION Shown below are the different steps of heat integration (5. 1. 1) Birla Institute of Technology Science Pilani 333031 31 5. 2 HEAT INTEGRATION IN CDU 1. IMPORTANCE OF HEAT INTEGRATION IN CDU Distillation is the largest single energy consumer in the Refinery. Large section of oil is spent in fuelling the CDU itself. It is energy intensive process as the temperature of the crude has to be elevated to a high temperature of 354 oC. This increase in temperature is achieved by exchanging heat in various heat exchangers between crude and streams of RCO, SR Gasoline, Kero 2 etc which are at high temperature. Heat integration focuses on achieving maximum energy recovery from these streams through an optimized HEN so that the crude can be supplied at highest possible temperature to the furnace, thus saving energy. A recent development in distillation technology has shown potential savings of up to 15-40 % through the heat? integrated exchanger network (pre-heat train) distillation column. 2. HEAT INTEGRATION AT CDU GUWAHTI REFINEY What has been done? 1. The basis of heat integration in heat exchange process is putting process hot streams in thermal contact with process cold streams. We have already seen how product hot streams of RCO, SRGO etc at high temperature are used to exchange heat with the crude oil at low temperature. 2. Designing of an Optimized Heat Exchanger Network in pre-heat train using heat integration tools like pinch analysis retrofit analysis in July 2010. This design allows maximum energy heat recovery. What can be done? 1. Using heat integrated distillation columns. HIDC can save energy by recovering excess heat from the rectifying section for usage in the stripping section. Birla Institute of Technology Science Pilani 333031 32 2. Seeing the interactions of HEN and distillation column and applying combined heat integration for whole unit. How to cite Crude Distillation Unit, Papers

Mobile Phones and the Internet free essay sample

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