Gas Compressor Essay Example for Free

Gas Compressor Essay A gas compressor is a mechanical device that increases the pressure of a gas by reducing its volume. Compressors are similar to pumps: both increase the pressure on a fluid and both can transport the fluid through a pipe. As gases are compressible, the compressor also reduces the volume of a gas. Liquids are relatively incompressible, so the main action of a pump is to pressurize and transport liquids. Types of Compressors Centrifugal compressors Centrifugal compressors use a rotating disk or impeller in a shaped housing to force the gas to the rim of the impeller, increasing the velocity of the gas. A diffuser (divergent duct) section converts the velocity energy to pressure energy. They are primarily used for continuous, stationary service in industries such as oil refineries, chemical and petrochemical plants and natural gas processing plants.[1][2][3] Their application can be from 100 horse power (75 kW) to thousands of horsepower. With multiple staging, they can achieve extremely high output pressures greater than 10,000 psi (69 MPa). Many large snow-making operations (like ski resorts) use this type of compressor. They are also used in internal combustion engines as superchargers and turbochargers. Centrifugal compressors are used in small gas turbine engines or as the final compression stage of medium sized gas Diagonal or mixed-flow compressors Diagonal or mixed-flow compressors are similar to centrifugal compressors, but have a radial and axial velocity component at the exit from the rotor. The diffuser is often used to turn diagonal flow to the axial direction. The diagonal compressor has a lower diameter diffuser than the equivalent centrifugal compressor. Axial-flow compressors Axial-flow compressors are dynamic rotating compressors that use arrays of fan-like airfoils to progressively compress the working fluid. They are used where there is a requirement for a high flow rate or a compact design. The arrays of airfoils are set in rows, usually as pairs: one rotating and one stationary. The rotating airfoils, also known as blades or rotors, accelerate the fluid. The stationary airfoils, also known as stators or vanes, decelerate and redirect the flow direction of the fluid, preparing it for the rotor blades of the next stage.[1] Axial compressors are almost always multi-staged, with the cross-sectional area of the gas passage diminishing along the compressor to maintain an optimum axial Mach number. Beyond about 5 stages or a 4:1 design pressure ratio, variable geometry is normally used to improve operation. Axial compressors can have high efficiencies; around 90% polytropic at their design conditions. However, they are relatively expensive, requiring a large number of components, tight tolerances and high quality materials. Axial-flow compressors can be found in medium to large gas turbine engines, in natural gas pumping stations, and within certain chemical plants. Reciprocating compressors Reciprocating compressors use pistons driven by a crankshaft. They can be either stationary or portable, can be single or multi-staged, and can be driven by electric motors or internal combustion engines.[1][4][5] Small reciprocating compressors from 5 to 30 horsepower (hp) are commonly seen in automotive applications and are typically for intermittent duty. Larger reciprocating compressors well over 1,000 hp (750 kW) are commonly found in large industrial and petroleum applications. Discharge pressures can range from low pressure to very high pressure (18000 psi or 180 MPa). In certain applications, such as air compression, multi-stage double-acting compressors are said to be the most efficient compressors available, and are typically larger, and more costly than comparable rotary units. [6] Another type of reciprocating compressor is the swash plate compressor, which uses pistons which are moved by a swash plate mounted on a shaft.

My Philosophy of Education Essay -- Educational Educating teaching Ess

My philosophy of education Throughout our school years we are told to decide what we want to do with our lives. I have had a hard time deciding on the right career choice for myself. During my field placement I learned that I really want to make a difference in children’s lives. The enjoyment that one gets out of seeing the looks on their students faces is rewarding. I enjoyed working with the students and now I know that becoming a teacher is for me. The purpose of education is to teach children that learning is valuable and that the mind wants and needs to grow by learning. All children can learn if they put their mind to it. Not everyone learns the same way, but we are all capable of learning. I have a cousin who is down-syndrome, he is the same age as my brother and graduated the same year I did. He graduated 4 years after he was supposed to, but he did it. His graduating class gave him a standing ovation, they were proud that he made it through. For this reason I believe that everyone can learn. He is just like a young child but he went to school and learned all that he could. Education is very important in life. Learning develops your mind and makes every person unique. As a teacher I hope to teach my students about everyday life, teach them math in a way that keeps their interests, and teach them to respect others. I want my students to respect me and look up to me and in turn I will respect them. My classroom is going to be an energetic room with students enjoying themselves, not unhappy because they have to do more math work. I hope that when my students leave my classroom they will have learned everything that I taught them. I once had a Math teacher whom all of her students loved. Sh... ...better understand. Bringing everyday activities into the classroom will be a part of my curriculum. After finishing school I would like to stay in Beckley. If there is a need for a math teacher some where else then that is where my plans will take me. After teaching for a little while my plans are to go back to school and receive a masters’ degree. One day I would like to teach college students, it would be an excellent experience in life. Teachers make a big difference in their students’ lives. One teacher could change the outlook of a student forever. Being able to make a difference is rewarding. Education shapes the world today. In any field that a person may choose there is some type of education behind it. A mechanic goes to a technical school for training, and a lawyer goes to law school. Every career available needs some form of education.

Answers Case of Abdala and Korman Essay

1. With whom do you agree here-Abdala or Korman? I don’t agree with any of them because both made mistakes that created the situation. 2. What mistakes do you think each party made? One of the mistakes made by both of them was the fact that both could not refrain from insulting one another. If one or the other would have simply been the bigger person and stopped responding, the situation may have not gotten out of hand. But if we focused on each of their mistakes firstly Abdala’s Mistakes: -She should have used any other channel of communication for delivering her decision to not accept the job offer. For instance, she could have scheduled a day to go by and tell Korman in person. Personal face to face conversations make the world a lot easier and closes the door for any misunderstandings. And if we looked into Korman’s Mistakes: -He could have accepted her offer in rejection respectfully instead of going as far insulting her and her method of delivery. – What happened between he and Abdala should have stayed between them. -Not having a job offer contract in writing for future credibility, which is basically the abc method in each job. 3. Do think this exchange will damage Abdala’s career? Korman’s Firm? Yes, it will definitely damage her career because it is never a good idea to burn bridges with people. Especially that Korman has his own firm and experience in prosecutions, Abdala may have ruined all of her chances at even having him being her counselor. And about Korman’s firm, his unprofessionalism may gain him a reputation, but not as much damage will be done to his firm. If he is responding to offer rejections the way he did with Abdala, he could miss out on an opportunity to later hire†¦ 4. What does this exchange tell you about the limitations of e-mail? Email conversations in general are formal way of communicating when used in business, so we can never mix a friendly email with formal business one or else there will be huge misunderstandings in the process, the email limits us to be more professional while working so it is beneficial if used in the right manner.

The Mill on the Floss - Role of Victorian Women - 2492 Words

George Eliot was an English novelist, journalist, and translator, and one of the leading writers of her life-time period. Although she would use a number of spelling variations of her name over the years, she was born Mary Anne Evans on 22 November 1819, into a middle-class family, in Warwickshire, England, and was the youngest of five children in her family. George Eliot, actually, was the masculine pen name of the writer Mary Anne Evans, one of Victorian England’s influential novelists. She changed her name 1819-1880 because writing by women’s name, especially which was of a vague nature, was not accepted in the Victorian society in which she lived. Eliot†¦show more content†¦But despite this, her world of â€Å"unimaginative, unsympathetic minds† (Book III: 59 p.) sees her as constantly doing harm. Not only does she infuriate her mother by refusing to behave like a real lady, and provoke her brother, Tom, by forgetting to feed his rabbits, by thoughtlessly eating her larger jam puff without sharing it with him, by unintentionally knocking over his card-house, and spilling his wine; but, when criticized, she takes revenge by silly and even naà ¯ve actions, such as hiding in the attic, dunking her head in water, cutting off her hair, pushing cousin Lucy into the mud, and running away to live with gypsies. Furthermore, almost all members of her family perceive her as unnatural. For her conventional mother, Mrs. Tulliver, she, whose absent-mindedness makes her seem â€Å"half an idiot in some things† and whose cleverness â€Å"runs to naughtiness,† which is â€Å"more natural for a boy,† is a à ¢â‚¬Å"mistake of nature† (Book I: 13 p.; 72 p.; 14 p.). Even Maggie’s fond father, Mr. Tulliver, who appreciates her gifts and mind, judges her unnatural on account of them; moreover, he thinks that for â€Å"a woman is no business with being so clever† (Book I: 22 p.). However, particularly around the time of Mr. Tulliver’s illness this clumsy, awkward child grows to a stately, sharp girl. But in a world which will restrict and control her choices most of the time Maggie has learnt to follow some of its external codes: she proves herself as a greatShow MoreRelatedAnalysis Of Mill On The Floss By George Eliot2199 Words   |  9 PagesThis research report reviews scholarly criticism on the much debated character MAGGIE TULLIVER from the book Mill on the floss written by George Eliot. The project I propose analyses Maggie’s character as a whole. The report will begin by discussing the critics point of view of various reasons responsible for the death of Maggie Tulliver. The report then focuses on how society and how her relationships lead to her downfall from the point of view of various critics. A part of my report also criticallyRead MoreMorality in Victorian and Neo-Victorian Novels Essay4239 Words   |  17 PagesMorality in Victor ian and Neo-Victorian Novels An essay on Jane Eyre, The Mill on the Floss, The French Lieutenants Woman, Possession and The Dress Lodger The Victorian era is one bound to morality. Morality is also defined through the traditional and religious standards that structure the way of life for many Victorians. Morality is defined as the proper principles and standards, in respect to right and wrong, which are to be practiced by all humanity. Ideally, these include obtaining