Liquefied Petroleum Gas Lpg Engineering Essay

Liquefied Petroleum Gas Lpg Engineering Essay Liquefied Petroleum Gas is an important source of energy for millions of people around the world. LPG consists mainly of gases at atmospheric temperature and pressure (propane and butane), which when subjected to modest pressure or refrigeration can liquefy. This makes it possible to transport and store as liquid in pressurized cylinders and containers, which must be safely and carefully handled. Definition: Liquefied Petroleum Gas (LPG) can be simply described as hydrocarbons that exist as vapours under ambient conditions of temperature and pressure, but can be liquefied by the application of moderate pressure. When gas is liquefied, the volume occupied by the vapour considerably decreases, thus the liquid formed requires less storage space. The material is therefore stored and distributed in the liquid phase in pressurized containers and systems and is finally allowed to return to the vapour phase at the point of eventual utilization. Sources of LPG: LPG as the name suggests, consists mainly of a mixture of hydrocarbons (Propane and Butane) with a little proportion of unsaturates (Propylene and Butylene). These hydrocarbons and unsaturates (LPG) can be produced through two main sources which are: Wet Natural Gas, which consists entirely of saturated hydrocarbons (Propane and Butane) and can be found in oil or gas fields, being removed as condensable products from natural gas and also extracts from crude oil during the stabilization process applied in order to reduce the vapour pressure prior to shipment; Refining process to remove impurities like moisture and sulphur compounds (hydrogen sulphide and mercaptans), which may lead to clogging of valves and corrosion. However, due to the odourless nature of LPG, ethyl mercaptan which has a unique odour, is added to alert the user of LPG incase a leak takes place. The product of crude oil refining fall into three main categories: The permanent gases, Methane and Ethane which remain gaseous regardless of pressure, unless refrigerated. Hydrocarbons having five or more carbon atoms per molecule. They are liquid or solid at atmospheric temperature and pressure and account for most of the crude oil refined. Propane, Butane and Isobutane, together with Propylene, Butylene and Isobutylene have three or four carbon atoms per molecule. All have the special property of becoming liquid at atmospheric temperature if moderately compressed and reverting to gases when the pressure is sufficiently reduced. C:UsersMr TDesktopIMAG0168.jpg Properties of Liquefied Petroleum Gas (LPG) Vapour Pressure Vapour pressure is a measure of the volatility of the gas and where vapour exists in conjunction with the liquid phase is referred to as the saturation vapour pressure. At the boiling point it is equal to atmospheric pressure and increases as the temperature rises to the critical. Propane with its lower boiling point thus exerts a greater vapour pressure under identical conditions than butane. Knowledge of the vapour pressure of a gas is thus essential in order to be able to specify the design conditions for the pressurized system. It is also required to enable the gas offtake rates by natural vapourization to be calculated. In practical terms, systems are often specifically designed to be suitable for either butane or propane which thus precludes a butane system from being used for propane, but enables the propane system to be classed as dual purpose. G:DCIM100MEDIAIMAG0198.jpg Boiling Points of LPG The constituent gases found in a commercial LPG mixture all have very low boiling points and will thus normally exist in the vapour phase, under atmospheric conditions, unless they have been liquefied or refrigerated. Where the gases are held at a temperature at or below their boiling point, the vapour pressure will be equal to or less than atmospheric. This property has led to the development of large scale storage at marine terminals where the product is held in refrigerated form in what is essentially a non-pressurized system. Above ambient temperature, the gases exert an increasing vapour pressure, thus increasing the pressure required for liquefaction. This pressure continues to increase until the critical temperature is reached, (96.67oC for propane; 152.03oC for n-butane), above which temperature of the gases cease to exist in the liquid phase even if further pressure is applied. Latent Heat of LPG The latent heat of a liquid product is the quantity of heat absorbed to enable vapourization to occur. In the event of liquid LPG being allowed to vapourize naturally, the latent heat required is taken from itself and its immediate surroundings at the same time, causing a drop in temperature. The process is known as auto-refrigeration. Very low temperatures can be achieved with propane under such conditions; therefore in order to avoid operators receiving severe cold burns, protective clothing is required. Specific Volume, Relative Density LPGs exist as heavy gases approximately 1.5 2.0 times the density of air in vapour phase. They reduce in volume considerably on liquefaction (ratio of gas volume to liquid volume at 15.6oC/1016mbar is 233 for butane and 274 for propane) to exist as a clear liquid which is approximately half the weight of water (Propane 0.50 0.51, Butane 0.57 0.58). It can thus be seen that LPG vapours heavier than air will tend to cling to the ground seeking to enter trenches, drains and other low areas, which could make it take considerably longer time to disperse. Leaking liquid phase LPG will rapidly expand to around 250 times its own volume, therefore creating a greater risk than would occur with a similar sized vapour leakage. Where temperature conditions permit the existence of free liquid from a leakage, the product will float on any water present. This normally occurs with butane in freezing conditions and a typical scenario would occur during firefighting operations. Coefficient of Cubical Expansion of Liquid Liquid phase LPG expands considerably when its temperature increases. The coefficients of cubical expansion at 15oC are approximately 0.0016 per oC for propane and 0.0011 per oC for butane. These values are around 4 times the equivalent for fuel oil, 10 times that for water and 100 times that for steel. This high rate of expansion has to be taken into consideration when specifying the maximum quantity of LPG permitted to be filled into any pressure vessel, ie the filling ratio defined by codes of practice for different specification of LPGs under different ambient conditions. Because the filling ratio precautions taken to prevent the hydraulic filling of storage systems cannot be extended to the connecting liquid phase pipework, these parts of the system are protected by the provision of small hydrostatic relief valves situated in all areas where the liquid LPG can be trapped between closed valves. Limits of Flammability Gaseous fuels will only burn when mixed with air in proportions which lie between two well defined limits, known as the lower and upper limits of flammability. The lower limit being the smallest quantity of combustible gas which, when mixed with a given quantity of air (or O2) will support self-propagating flame. A leak of 1m3 of liquefied propane will produce 274m3 of propane vapour, which will cause immediate entrainment of air and progressive dilution of the concentration. When the upper limit of 10% is reached, the propane/air mixture becomes flammable (ie when the propane entrains, 274 10 = 2740m3 of air). The mixture only becomes flammable when the lower limit of 2% is reached (ie when the propane entrains 274 50 = 13,700m3) of air. Therefore, should a leak of propane occur, the propane/air mixture will be flammable and hence extremely dangerous until it has been diluted with more than 13,700m3 air per m3 of propane leakage. The following are the limits of flammability of LPG and some other fuels: Gas Lower Limit Upper Limit Commercial Propane 2.0 10.0 Commercial Butane 1.8 9.0 Natural Gas 5.0 15.0 Coal Gas 5.0 40.0 C:UsersMr TDesktopIMAG0189.jpg

Destiny, Fate, Free Will and Free Choice in Oedipus the King - Defining

Fate in Oedipus Rex      Ã‚  Ã‚   During ancient times, the Greeks believed very strongly in a concept called "fate".   What is "fate"?   Fate can be defined as a cause beyond human control that determines events.   It can also be defined as the outcome or end of some sort.   In "Oedipus Rex", King Oedipus is a character that lived by fate and died by fate.   This element of fate truly impacted the storyline and the plot, while allowing for some interesting developments that may have been unforeseen by the viewing audience.      Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   In Sophocles' "Oedipus Rex", fate truly is a huge factor in many scenes and events.   According to ancient Greek belief, the word of God was fate, and fate was the word of God.   Therefore, every event that ever happened was predetermined and unchangeable.  ... ...d the legend itself.   Due to the ancient Greeks' wholehearted acceptance of fate as the word of God himself, many ironic events occurred due to the twists of fate.   Sophocles masterfully weaves pieces of a legend together to create a dramatic tale of fate and irony called "Oedipus Rex".    Works Cited Elsom, John.   "Fate and the Imperial Dream."   World & I.   February 2000.   82-90.   

Andrew Carnegie: One of the Pioneers of the Big Business

Big Business Report University of Phoenix Ursula Murgado Introduction One of the pioneers of the Big Business I chose to research is Andrew Carnegie. In this paper I will include how was his business and how did Mr. Carnegie started his business. I will also talk about how his business grew to the level it did. The good and bad effects of the business in the 19th century, How Mr. Carnegie business affected society today, what were the pros and cons of this business, if this cons and pros still exist. Andrew Carnegie was an industrialist and philanthropist.Andrew Carnegie was born in November 25, 1835 in Dunfermline, Scotland. He was the son of a handloom weaver. Andrew’s Carnegie parents decide to move to North America in 1848 because of the conditions that they were living. Andrew’s father settled his family in Allegheny, Pennsylvania. Carnegie starting working at an early age in a factory getting pay $1. 20 a week. Then at the following year he found a job as a telegr aph messenger. By the year 1851 Carnegie became a telegraph operator because of his efforts to get ahead in life.After two years working as a telegraph messenger Carnegie decides to work at the Pennsylvania Railroad, he was the assistant and telegrapher of Thomas Scott, one of the railroad’s main officials. This job help Carnegie to learn about the railroad industry and also in business. After three years he was promoted to superintendent. Carnegie business was the steel company but he started his investment before he open his own steel company. He started investing in the years 1863 or 1864 and during the war years too. His profits were very high.First, his share of he† Woodruff Sleeping Car Company , he also invested in the Western Union Telegraph Company, The Iron City Forge, The Columbia Oil Company and the Third National Bank of Pittsburgh†. He also made other investments, that helped him own shares in more than twelve different companies. He was making aroun d $39,000 in investments plus his salary of $2400 dollars a year. He left the Pennsylvania Railroad before the Civil war started. His determination in investing during tough times help him grow his business to the level it did.Carnegie business in his Steel Industry help him revolutionize the production of steel in the United States. Carnegie was able to construct many steel plants around the United States with the a technology that made the manufacture of steel faster, easier and more productive. Carnegie owned everything he needed in order to become the â€Å"King of Steelâ€Å". Some of the negative effects of big business in the 19th century was the atmosphere and working conditions of the workers at the time repeatedly change. Technology is another negative effect because the products were not being complete made by an individual.Immigration was another effect. The positive effect was that more money for this country. A positive effect that Carnegie’s business had on s ociety were his donations to build libraries in the United States and in other English speaking countries. Carnegie funded about 3,000 libraries in 47 US states and other countries. In 1901 he gave two million dollars to create the Carnegie Institute of Technology in Pittsburg and the following year he donated the same amount to Washington D. C to found the Carnegie Institution. In my opinion Carnegie did a lot positive things for society.He was able to accomplish the American dream, as we know he was an Scotland immigrant. One of the negative things was the Homestead Mill strike because it â€Å"broke his reputation as a friend of the workers†. The pros of the big business in the 19th century were the benefits that industrialization gave to the people, like how the life of Americans improve and how their wages climbed. The cons was that everything comes with a price. The fact the workers bargain for better wages and better conditions at work was one of them. In my opinion th ese pros and cons do still exist in some way at this time.   Maybe not at the extent of the 19th century but they still exist .References Kent, Zachary. Andrew Carnegie, Steel King and Friend to Libraries, Historical America Biographies, 1999. Davidson-Gienapp-Heyrman-Lytle-Stoff:, Nation of Nations: A Concise Narrative of the American Republic, Fourth Edition IV. Global Essay: The United States in an Industrial Age19. The New Industrial Order (1870? 1900) The McGraw-Hill Companies, 2005. American Experience, The Richest Man in the World Andrew Carnegie. The film and more. http://www. pbs. org/wgbh/amex/carnegie/peopleevents/index. html

Web Communication and Advertising

Web Communication and Advertising The development of online technologies has transformed marketing strategies of many companies; in fact, nowadays it is difficult to find a product that is not advertised via Internet. Advertising We will write a custom essay sample on Web Communication and Advertising specifically for you for only $16.05 $11/page Learn More However, many organizations still underestimate the benefits offered by the World Wide Web. This paper aims to develop an Internet marketing strategy for such a product as mineral water. It is normally advertised through television, radio, and billboards but online channels are seldom used. There are several objectives which have to be attained: 1) to raise the customers’ awareness about the product; 2) to allow the customers make online purchase; 3) to increase the customer base of the company. This internet advertisement will target two types of clients: Individual customers who may be willing to learn more about different compa nies selling mineral water. Private companies: restaurants, hotels, snack bars, fast food chains that will make wholesale purchase. At this point we can discuss several aspects of online advertising and their importance. One of them is direct e-mail. We are going to use in order to inform our returned customers, most likely, they will be wholesalers, restaurants, hotels about new products, benefits and discounts. It is also necessary to compile a list of prospective companies that may require this kind of product and send them newsletters. One should note that customers should be contacted via e-mail no more than two times per month; otherwise these mails can be regarded as spam. The major benefit of this approach is that it enables the company to raise awareness about the products and about other offerings. Additionally, direct e-mail enables companies to maintain long-term relations with returned customers. Cross-media advertising is another aspect of Internet advertisement that one should utilize. Overall, this approach can be regarded as combined use of television, radio, print and video (Chaffey et al, 2009). The distributers of mineral water can successfully adopt this strategy with the help of Internet since nowadays there are many online radio stations or online newspapers; furthermore, one should not forget about online television. Additionally, there are also many video-sharing websites where companies can post their commercials. The producers of mineral water can promote their products through each of these media. Cross-media advertisement is important for the attraction of new customers. By adopting this approach, the companies can reach a wide target audience (Chaffey et al, 2009, p 180).Advertising Looking for essay on business economics? Let's see if we can help you! Get your first paper with 15% OFF Learn More The companies, which produce and sell mineral water, can also rely on banner advertising. These banners shoul d be placed at the websites of online newspapers and Internet forums. The banners should emphasize some distinguishing properties of the product such as the benefits for health of the consumers, its taste and certainly the price. In this case, the main objective of this strategy is to attract the customer’s attention to the product (Belch Belch, 2009). Furthermore, the banners must provide links to the website of the company. It will be particularly relevant for private companies that may be searching for the information about different producers of mineral water. In this way, they will be able to make online wholesale purchases. Banner advertising is important to that extent that it serves different purposes at a time: first, it enables the company to increase people awareness about the company and most importantly form the customers’ initial perception of the product. Prior to launching an Internet marketing campaign, the company should accurately determine the ta rget market. As it has been mentioned before, the producers of mineral water should address the needs of individual clients and profit organizations like restaurants, hotels. The potential consumers of this product can be of different age, sex, income level, values or occupation. Therefore, one should not give preference to only one type of websites. Thus, the advertisements should be placed at forums, social networks, web directories, website of different newspapers, etc. The identification of target market is crucial for a company because one has to understand the purchasing habits of the customers. The key advantage of Internet marketing is that it can allow us to target different groups of customers, depending on their age or occupation. We need to mention some other elements of an Internet marketing strategy; they are public relations (PR) and promotions. The manufacturers of mineral water should maintain their public image by providing information about themselves at their w ebsites. They need to focus on such issues the technology that they use, the quality standards, health benefits that they offer to the customers.Advertising We will write a custom essay sample on Web Communication and Advertising specifically for you for only $16.05 $11/page Learn More In the age corporate social responsibility PR management can play the most crucial role. Its purpose is to ensure that customers take positive attitude to the firm. PR campaign has to convince them that the company cares not only about profit-making but also about the community. At the beginners companies producing mineral water should choose above the line promotion which means that they need to pay a specific agency (online newspaper, forum, social network, video-sharing website) for the placement of the commercial (Jones, 2007). At this particular stage, they need to attract the customers’ attention to the brand. The selection of promotion strategy is crucial for t he formation of brand identity; in other words, they aim to make the name of the company as well as its products recognizable. The enterprises which intend to sell mineral water have to conduct Internet marketing research. In particular it is necessary to conduct survey among the customers and ask them about those qualities which they value most in this type of product or why they select a specific product among many others. Secondly, it is vital to learn what kind of websites they regularly visit. Internet marketing research can shape the outcome of a marketing campaign because it will give the company insights into the values and habits of customers. Finally, one has to speak about the search engine registration. The producers of mineral waters create official websites that would be accessible through different search engines like Google, Yahoo, AltaVista, MSN etc. Search engine can improve the visibility of the company and its products. This is why one should not disregard them. Therefore, in this paper we have demonstrate how producers of mineral water can benefit from Internet marketing and its various aspects. The key advantage of this approach is that it allows to target a wide audience. Moreover, it is less expensive than traditional marketing.Advertising Looking for essay on business economics? Let's see if we can help you! Get your first paper with 15% OFF Learn More Reference List Belch, G. and Belch, M. (2009). Advertising and Promotion. (8th ed.). NY: McGraw-Hill Irwin. Chaffey D. Chadwick F. Mayer R. Johnston. K. (2009). Internet marketing: strategy, implementation and practice. NY: Pearson Education. Jones M. (2007). Customer Communications. Oxford: Butterworth-Heinemann.

Free Essays on The Gift Of Jews

The book I'm reading is called "The Gift of the Jews", written by Thomas. Basically, his writing style is such that both the believer and non-believer can be satisfied with his prose, without becoming unduly offended. He brings out points and events that most archeologists and/or biblical scholars agree on, but he does so in a way that tends not to offend. This includes the Reed Sea vs. the Red Sea, Hebrew as a written language was not developed until around 1000-800 BCE, Abraham and his descendants believed in other, less powerful Gods other than Jehovah, etc. He often puts himself in a given era and tries to portray what the people of that time probably thought and believed. For me, it was not an easy read, but a good way to better understand the Old Testament, the beginning of the Jewish, and how Jewish philosophy evolved over 2000 years, and became the basis for much of the Western World's philosophy about the human condition. When I say that, I'm not talking about Socrates or Ar istotle or the other Greek and Roman scholars. I think that they gave us the basis for rational, logical thinking. The Jewish culture, on the other hand, gave us the idea that life is a journey, not a cyclical repetition of past events, that we are all individuals, that we can all experience fullness of life, that justice is for all that humans have certain inalienable rights, and that we can all have a personal relationship with God. All of these concepts were completely foreign to the civilized world before the Jews came to be. When I think of the Tanach, the Jewish Bible, I think of it mostly as the source of guidance and identity for the Jewish people. The Bible is full of mitzvoth, commandments, both ethical and ritual, and also of the recounting of the events which created us as a Jewish people. The Bible is part of what holds us together as Jews of different nationalities and religious persuasions. It is the source of our common referents and our sens... Free Essays on The Gift Of Jews Free Essays on The Gift Of Jews The book I'm reading is called "The Gift of the Jews", written by Thomas. Basically, his writing style is such that both the believer and non-believer can be satisfied with his prose, without becoming unduly offended. He brings out points and events that most archeologists and/or biblical scholars agree on, but he does so in a way that tends not to offend. This includes the Reed Sea vs. the Red Sea, Hebrew as a written language was not developed until around 1000-800 BCE, Abraham and his descendants believed in other, less powerful Gods other than Jehovah, etc. He often puts himself in a given era and tries to portray what the people of that time probably thought and believed. For me, it was not an easy read, but a good way to better understand the Old Testament, the beginning of the Jewish, and how Jewish philosophy evolved over 2000 years, and became the basis for much of the Western World's philosophy about the human condition. When I say that, I'm not talking about Socrates or Ar istotle or the other Greek and Roman scholars. I think that they gave us the basis for rational, logical thinking. The Jewish culture, on the other hand, gave us the idea that life is a journey, not a cyclical repetition of past events, that we are all individuals, that we can all experience fullness of life, that justice is for all that humans have certain inalienable rights, and that we can all have a personal relationship with God. All of these concepts were completely foreign to the civilized world before the Jews came to be. When I think of the Tanach, the Jewish Bible, I think of it mostly as the source of guidance and identity for the Jewish people. The Bible is full of mitzvoth, commandments, both ethical and ritual, and also of the recounting of the events which created us as a Jewish people. The Bible is part of what holds us together as Jews of different nationalities and religious persuasions. It is the source of our common referents and our sens...

Stock market Essay Example | Topics and Well Written Essays - 2500 words

Stock market - Essay Example Gross Domestic Product is the total market value of all the final goods and services produced within a nation's borders in a given time period. Each goods and services produced and brought in the market have a price. The price of the total output is called as GDP. It can be measured by either cumulating all the income earned in the economy or all the spending in the economy and both measures should roughly equate to the same total. GDP is the basic measure of an economy's size. With the GDP used as a key indicator of economic activity and future economic prospects, any significant change in the GDP, either up or down, can have a major effect on stock market investors' sentiment. If investors believe that the economy is improving, and corporate earnings improving along with it, then they are more likely to bid stock prices to higher levels. Conversely, an actual or expected decline in GDP is very likely to run in parallel or in advance to a declining stock market. There is an alternat ive view to the interplay between GDP and the stock market. The stock market itself may exert a reverse effect on subsequent economic activity: a fall in the market may erode personal wealth, real or perceived, such that individuals will stop spending. With consumer spending representing around two-thirds of GDP, even a small change in consumption can exert significant negative effects on GDP. This is referred to as the "wealth effect", where if investors feel poorer, they will stop spending, thereby decreasing GDP and further exacerbating an already declining market. The Housing Market: The housing market is one of 10 leading economic indicators and a good measurement of discretionary spending by the general public making up 5% of the value of the overall economy. When the economy is up, people have a tendency to spend more and housing permits and sales are good indicators of this trend. When the economy slows people spend and building and buying will have a tendency to decline. The concern in the current housing market is with the recent surge in defaults with sub-prime loans. This trend is a major factor in the current decline of the housing market which can act as a deterrent to growth and can cause a ripple effect in the rest of the economy.

Global Business Environment - the Banking Sector of Pakistan vs Essay

Global Business Environment - the Banking Sector of Pakistan vs. Uk&Greece - Essay Example 1.2 The Crisis Chain The global financial crisis brought about a tremendous and dramatic turn around in the banking sector across the world and there were hardly any economies that remained unaffected by the same. Not just the banking sector, but the sub-prime mortgage crisis brought about a chain of crisis causing a high velocity downfall in real estate, stock exchanges, and insurance companies as well – many big names fell apart, bail out packages were developed in order to reduce the impact, inflation went sky rocketing, and at the end of the chain, consumers lost loads and loads of money. Krugman (2009) states that a situation came where economists describe that there were empty houses in the US, and homeless people outside the same – showing the reduced purchasing power, and high prices of land and mortgage. Economists call the year 2008 as the ‘Global Financial Earthquake’. This era was known as the most depressive economic scenario since after the Gr eat Depression of the early 30s. This assignment aims at discussing and comparing how the environmental and macroeconomic variables in countries like UK, Greece, and Pakistan have affected the banking sector in these respective regions. ... It shows the linkage of financial markets with government, the employment (or unemployment), organizations and corporate, households, and the commodities markets. There is strong co-relation between these entities and any jolt, can lead to a drastic effect on all the others. 2. Analysis of Banking Sector in UK 2.1 PLEST Analysis Paulson (2011) states that the global financial earthquake of 2008 ripped apart the exceptionally high growth of the previous years, closing the huge names of the financial sector close to bankruptcy. In terms of the banking sector in the UK, the banks are rather politically and legally secured – as UK is recognized as the pioneer of financial system globally. The banking sector is also technologically fairly sound. The 2008 decline was primarily witnessed due to the drastic changes in the economic and social habits and norms of the population. Primarily a sub-set of the sub-prime mortgage crisis that initiated the panic, UK’s economy took a dow nturn. The primary cause of this being the over -spending habits that had embedded in the norms of the society, which was in turn, was caused by the easy presence and availability of the credit cards. Lewis (2011) states that most of the consumers had over spent their budgets in expectation of their future cash flows, which did not happen as bankruptcy became a common feature, employees were laid off in one go, salary, were reduced, and big names like JP Morgan, Lehman Brothers, etc. went off the hook. Government ultimately intervened with bail out packages to assist in the survival of the financial backbone of the economy. 2.2 Macroeconomic Indicators There are three primary macroeconomic