Sterling Engines :: physics sterling engine

The Sterling heat engine was invented by Robert Stirling in 1816. He was a reverend in the Scotland who built heat engines in his home workshop. His Heat Economiser was patented in 1816. The engine incorporates ideas of reduced fuel consumption compared with the current steam engines. Further development to the engine happened when his younger brother suggested using pressurized gas as the working fluid. Additional patents in 1827 and 1840 were for improvement to the design. A closed cycle with external heating engine that has a power piston, a displacer to move the enclosed air between the hot and cold ends a regenerator in now called a Stirling Cycle Engine. Air in the engine is cyclically heated (by an alcohol burner) and expands to push the power piston (shown in blue) to the right. As the power piston moves to the right, the yellow linkage forces the loose-fitting, red "piston" (on the left half of the machine) to displace air to the cooler side of the engine. The air on the cool side loses heat to the outside world and contracts, pulling the blue piston to the left. The air is again displaced, sending it back to the hotter region of the engine, and the cycle repeats. Stirling Engines work on a temperature difference between the hot end and the cooling fins. Any source of heat could be used. Refrigerant on the cold end may be needed for long term use or if the barrier conducts too much heat. On a finely machined Stirling engine, the temperature difference can be as low a just a few degrees- the heat from your hand can be enough to power the flywheel. Stirling Engines are most commonly found in waste heat recovery systems. Power plants that generate hot water could be used to power several heat engines for no additional cost after setup. However, the power generated by these engines would be only a fraction of what the steam turbine is putting out. Set up costs are high enough that waste heat recovery systems are not too common. Interests in heat engines may increase because they minimize the cost per unit energy being produced. For large scale power production, Stirling Engines are too expense to make. Given current energy shortages and rising environmental concerns, heat engines may become more attractive. The most common application of Stirling Engines is water pumping. Even Robert Stirling modified his engine to pump water from a stone quarry.

Surrealism and Salvador Dali Essay -- Salvador Dali Artists Painters P

Surrealism and Salvador Dali Salvador Dali, was born Salvador Felipe Jacinto Dali i Domenech on Monday, 11 May 1904, in the small Spanish town of Figueres, in the foothills of the Pyrenees, approximately sixteen miles from the French border in a region known as Catalonia. His parents supported his talent and built him his first studio while he was still a child in their summer home at Cadaques. Dali went on to attend the San Fernando Academy of Fine Arts in Madrid, Spain. He was married to Gala Eluard in 1934 and died on 23 January 1989 in a hospital in Figueres (Etherington-Smith, 12). Dali never limited himself to one style or particular medium. Beginning with his early impressionistic works, greatest inspiration. Surrealism emerged from what was left of Dada (a European movement categorized by its irrationality and lack of traditional values, sometimes referred to as nihilistic) in the mid 1920’s and unlike Dada, Surrealism held a promising and more positive view of art and because of this it won many converts. Surrealism actually got its beginnings as a literary, not artistic, trend in Parisian publications (Stangos, 122). What Surrealism and Dadaism held in common was their belief in the importance of the unconscious mind and its manifestations, as was stressed by Freud. They both believed that through the unconscious mind a plethora of artistic imagery would be unveiled. Both of these , called automatism. The Surrealists also wanted to answer the ques...

On the Quai

â€Å"On the Quai at Smyrna† As a collection of stories that take the reader through the confusing and disorienting journey of America soldiers in World War I, the introduction, â€Å"On the Quai at Smyrna,† is no exception. Hemmingway begins his introduction without any explanation of who is reminiscing and provides only details to create an image in the reader’s mind. Hemmingway creates no context for which to frame the events, and by doing this, Hemmingway throws the reader into the story, not unlike the soldiers who were thrown into a war.Throughout the introduction Hemmingway creates an image of suffering and despair, however the narrator is never introduced. Using this confusing and disturbing prose as an introduction, Hemmingway sets the reader up for the perplexing and horrible stories that the soldiers are telling throughout In Our Time. â€Å"On the Quai at Smyrna† describes a world where gruesome stories are so commonplace that a telling is rece ived with less shock and awe and more indifference. Hemmingway sets up the story by explaining, â€Å"he said† (Hemmingway) as a frame.There is no more background given; no other details are displayed to help the reader understand the situation. The reader has to work through what â€Å"he said† to find out the setting, the characters, and the entire situation. This use of framing is atypical and causes the reader pause when relating to the protagonist. By structuring the story this way, Hemmingway draws the readers’ attention to the fact that it is not a first person account of the war, but of someone’s retelling. The story is told by the officer, it seems, to someone who has had a similar experience with the war and would understand.The story includes obscure references and specific things of which a reader might not have sense. The anonymous narrator is a British officer at Smyrna and is relaying his stories to possibly an old war friend saying,  "You remember the harbor,† (Hemmingway) leading the reader to believe these two have shared similar experiences. Hemmingway uses this confusion to show have the soldiers in the war might have felt confused about a number of issues. At this point, the narrator is telling the story so matter-of-factly that he might have destroyed all emotions linked to the horrifying events of the war.Because this officer has seen such terrible things, such as a mother holding her dead babies, he has become immune to the emotions that the reader feels from these situations. This set up the rest of the stories of In Our Time with a tone of horror that becomes more developed throughout the rest of the novel. â€Å"On the Quai at Smyrna† starts with the narrator, an officer, talking about â€Å"them,† screaming at midnight. Although â€Å"they† are never identified, the officer makes a point to explain that he does not know why â€Å"they† are screaming.This is just the beginning of the numerous ways that the soldiers in World War I are confused about the happenings in the war. Not only is the reader disoriented, but the so is the narrator. The officer begins a conversation with Turkish officer on the pier. The narrator explains that a Turkish officer wants the narrator to discuss one of the narrator’s sailors who had been insulting to the Turkish officer. Hemmingway does not use quotations to explain this conversation between the Turkish officer and the narrator hoverer, a Hemmingway switches to dialogue as the narrator talks to his sailor.The reader is told exactly what the sailor responds, as if what the Turkish officer’s dialogue was less important. By switching the style of storytelling, Hemmingway ensures that the reader will more so identify the narrator of the story. The speaker is unable to find the words he needs to use to describe his environment. While telling the story, the narrator struggles with holding in his feelings about the situation and giving an accurate portrayal to his companion. There were plenty of nice things floating around in it. That was the only time in my life I got so I dreamed about things.Hemmingway has the reader speak with a limited vocabulary in order to show his inability to find the appropriate words. The speaker doesn’t describe what was floating in the harbor or about what he was dreaming. By creating the rhetoric of the speaker to be so barren, Hemmingway shows the emotional detachment the speaker had to the horrifying truths of war. The reader sees that the dreams had by the speaker were most likely nightmares of terrible things he had seen at the pier, and is using his lack of language to control his emotions.The officer then tells about the women who are unwilling to give up their dead babies bodies. The way the narrator tells this story, in short choppy phrases and sentences, is parallel to his emotions. Hemmingway writes in this way so that although the read er knows and is even disturbed by these stories, the speaker is unattached. The narrator has seen so many traumas in the war that he is unable to display emotions that someone who is not privy to that world would display.By creating this cognitive dissonance in the reader, Hemmingway emphasizes the harsh realities of a war-laden environment. The narrator seems to talk as if he as seen too much, and what he has seen was not easy to swallow with the mindset he previously had before coming to war. After seeing all of these terrible situations, he has become overly withdrawn and able to tell a story full of facts including the gory details. The denial of his emotions proves that he is powerless to discuss his feelings during this time.As the English officer begins to speak about the strange death of an old woman, the reader sees no change of emotion within him. He interrupts him self while explaining, â€Å"We were clearing them off the pier, had to clean off the dead ones, and this ol d woman was lying on a sort of litter. † (Hemmingway) The speaker is remembering himself as he tells the story, and nonchalantly adds that it was the dead bodies that he was cleaning. Explaining something that could already be assumed, the narrator is emphasizing what his job entailed.Although he links no emotional memory to this responsibility, the fact that he adds that his chore was to remove the dead bodies, shows that he was uncomfortable with it. By reminding himself of the terrible things he was asked to do, the speaker shifts in his emotional restraint for just a quick second. There is no reasoning behind the facts. The speaker talks about the way things were, but never explain why the babies were not given away, or why the animals were crippled before going into the water. As the reader, it is impossible to assume why these things happened.Hemmingway puts the reader in the same mindset as the narrator, as if the narrator also has no knowledge of the motives of these p eople. The confusing atmosphere during wartime is mimicked in the speaker’s retelling of the story. A terrible, horrible scene is created not by the speaker, or by Hemmingway, but by Hemmingway to allow the reader to think of the worst possible â€Å"things. † But putting the control of the surroundings into the mind of the reader, Hemmingway is able to propel the reader to reach the outskirts of his or her own fears.The sarcastic irony the speaker uses, saying things like â€Å"nice things,† â€Å"nice chaps,† â€Å"a most pleasant business. † (Hemmingway) Shows that he is unable to come up with the words to display his feelings properly in the telling of his experiences. Whoever is listening to the story knows that the speaker was greatly affected by tragedies, but the speaker is not willing to admit it. By using irony, the narrator shields himself from having to relive memories that were already painful enough the first time.The speaker knows th at a large percentage of what he did was inhumane, and wrong, and by saying that it was â€Å"nice† or â€Å"pleasant† he creates a barrier for himself and his feelings of guilt. Because he had no power to control the happenings in the war, but does feel responsible for treating people without respect, he used ironic language to display those feelings, rather than look weak. Hemmingway creates a man that is devoid of his emotions, rather stereotypically, to tell the horrors of war in a factual way. Works Cited Hemingway, Ernest. In Our Time. New York: Scribner Paperback Fiction, 1996. AZW.

American Airlines Flight Essay

Through his 1997 Airframe novel, Michael Crichton describes Casey Singleton’s response after a plane that was manufactured by Norton Aircraft experiences an accident while in flight. Singleton is a quality assurance officer at Norton Aircraft. Does the story accurately portray an aircraft manufacturer’s response to an accident? By demonstrating that following the accident, Norton Aircraft works hard to ensure that it (Norton Aircraft) does not only ascertain the genesis of the accident, but also to try to exonerate itself from any culpability, Crichton presents an accurate picture of aircraft manufacturers’ reaction to plane accidents. To illustrate, Singleton puts forth great efforts to investigate the facts behind the accident (Crichton, 1996). It is notable that a Singleton is not interested in the numerous aspects that usually surround pane mishaps. Rather, she seeks to establish who erred with regard to the accident. This is the typical reaction of aircraft manufacturers after plane accidents; they seek to apportion blame rather than solve the problem. Does the story accurately portray the media’s response to an aircraft accident? Crichton also presents a credible description of how the news-hungry media usually responds after plane accidents. It is undisputable that media houses jostle to present that so-called ‘exclusive’ story to the public after air accidents. This trend is clearly exhibited by the plans by a local media house to air a sensational news program that has somewhat maliciously dubbed the ill-fated plane a ‘deathtrap’. The author thus describes and critiques the sensational attitude that the media shows towards plane accidents. What was your overall impression of the story? After studying Crichton’s story, I was pleased with the author’s description of events that closely resemble real-life aviation accidents. For example, in describing the circumstances as well as the cause of the accident, Crichton draws parallels with the American Airlines Flight 191 fatal crash. In addition, Singleton’s investigations reveal that the accident was partly caused by the captain’s error of allowing his inexperienced son to take charge of the aircraft. Similarly, the Aeroflot flight 593 mishap in 1994 originated from the pilot’s mistake of permitting his inexperienced son to man the flight. Discerning such parallels to real-life events makes me to like the novel owing to its seeming applicability in contemporary mishaps. On the other hand, after closely examining Crichton’s plot, I have deduced several themes which make the author’s text very significant. For example, the author describes events that seek to show that air accidents are usually blamed on the wrong parties. In this case, John Marder and his associates try to place the blame for the accident squarely on Singleton. After her investigations, Singleton however detects that the fault was in the person who was operating the aircraft, particularity the pilot. The author thus demonstrates that innocent and vulnerable parties usually unjustly carry the blame for plane accidents. This candid portrayal of the blame games that accompany plane accidents is an aspect that makes the author’s work worthy of praise. In addition, I marveled at Crichton’s demonstration that humans, as opposed to mechanical failures, are the main cause of plane accidents. The author thus eradicates the popular notion that machine failure is normally the major culprit behind plane accidents. To illustrate, the aircraft is functional as per Singleton’s investigations. Human error, in form of improper maintenance coupled with operational errors; make the plane to have the accident. Crichton thus debunks a popular myth related to aircraft accidents through the novel’s events. This aspect makes me to really like the author’s bluntness and originality. References Crichton, M. (1996). Airframe. New York: Knopf.

History of My Surviving in Math Classes Essay Example | Topics and Well Written Essays - 500 words - 1

History of My Surviving in Math Classes - Essay Example Second grade, third grade and fourth grade passed and I struggled to at least survive in math class. I felt isolated from the rest of the class by just the mere sight of them participating in recitations, taking a look at each other's satisfactory score, whilst I hardly pass any quiz or seatwork at all. Whenever I get a grade that was barely passing, I felt happy while my classmates frown upon looking at theirs, despite the wide gap their scores possess over mine. I thought I was never meant to go to college if my math malady was not going to be resolved. I was a bright student in other subjects and my classmates sounded upset whenever I told them my math problems. I thought I was the only one who had it - excellence in other subjects and a loser at math. I approached my Math teacher and told her that I feared to flunk the subject and that it would not be unfair if she were not to give me any consideration; I deserved a failing grade. She had that look on her face that looked as if she understood my situation right away, as though she had also been through a struggle exactly like mine. "In the first place, why did you not come earlier I was more than willing to boost your spirits up.  When I saw you, I saw myself.†   Right there and then, she had told me her story; she not only hated math when she was my age but failed a number of times, then got encouraged by her teacher.

MD4 Assgmnt 2 Essay Example | Topics and Well Written Essays - 250 words

MD4 Assgmnt 2 - Essay Example Our monthly meeting used to be sheer waste of time. He would never come equipped with necessary information or knowledge regarding the issues that were to be discussed. He would also often digress from the main agenda and go on talking to the white board, which were never actually required. His evasive tactics showed his poor capabilities and each of us would be looking at the clock to strike 5 so that we could all leave. The two cases of public speakers have been good examples from whom I have taken good tips. As a good public speaker, one should come equipped with knowledge as well as understanding of the audience. This way one not only earns respect of the people but is also able to inform the audience about the concerned topic. The eye contact with people is important because it inculcates personal bonding and trust. The occasional witty remarks and use of humor greatly strengthens the connection with the

What Customer Service Means to ME Term Paper Example | Topics and Well Written Essays - 2250 words

What Customer Service Means to ME - Term Paper Example I immediately logged into my checking account to see what it was referring to, and to my shocking surprise, there was a check scheduled to be sent to PSE&G for $19,589.00 for Novembers billing statement. So I immediately tried to edit the error to the correct amount of $195.89, but the online bill pay would not allow me to correct the error. So I then contacted the customer service at Bank of America to assist me in correcting this error or cancel it. After speaking to several customer service reps, I still got the same answer from each one, â€Å"sorry you had plenty of time all week to correct it, and it is now in the system and will be processed†. So then I called the customer service dep’t at PSE&G to explain what’s happening and see if they can help stop this train wreck. Well, guess what, I practically got the same responses from their customer service reps, but with even a bigger attitude. They told me â€Å"well when we get the check, we’ll going to process it because it’s our money†. Now this is after they’ve confirmed that the bill was only for $195.89. So after being on the phone with both companies for about 3 hours total on a Friday night, I immediately stopped all of my current transactions for the rest of the month with the online bill pay system. ... But he did tell me â€Å"don’t worry about it, I can see it’s an simple error, and it’ll be rejected because you didn’t have enough funds to cover it - it’ll just bounce back to them for insufficient funds. You should keep an eye on the account to inform us when it was submitted for payment†. Well I did just that, I kept my eye on my account every day the following week to see when it get submitted for payment. The check was schedule to be sent out that following Monday December 3rd, and the check was submitted by PSE&G that same day. So I called the branch manager concerning the check, and he informed me that he already bounced the check back to PSE&G for insufficient funds. He also told me to look for it again for the 2nd submission for payment, so he can do the same. That Wednesday, PSE&G submitted it again for the payment, and the branch manager did what he promised to me would do - send it back for insufficient funds. So now I’m r elaxing the train wreck has been avoided, but was it? Come Friday, I get a call from the central office of Bank of America, that they have started proceedings to collect on an outstanding balance of insufficient funds for a check that was deposited and processed a 3rd time by PSE&G, and they demand payment or else. Now I’m in shock, amazed and very pissed off with what was just said to me by some numskull who doesn’t have any common sense to review what’s been going on. So I gave him a few choice words and told what I think of him and the bank because it’s obvious that one hand doesn’t know what the other hand is doing, and that there weren’t any note, warnings or flags posted to my account for these Moran’s to stop