Ocean Thermal Energy Conversion Otec Environmental Sciences Essay

Ocean Thermal Energy Conversion Otec Environmental Sciences Essay The oceans cover a little more than 70 percent of the earth surface. This makes it the worlds largest solar energy collector and energy storage system. On an average day, 60 million square kilometers if tropical seas absorb and amount of solar radiation equal in heat content to about 250 million barrels of oil. The history of mankind, have depended upon its ability to conquer the forces of nature, and to utilize these forces to serve its needs. Energy technology is certainly one of the most important factors in the emergence of mankind as the dominant species of this plant. The invention of the practical steam engine by James watt, brought about development of large factories, steam ships and the steam locomotive. First wood was used, then coal. About the same time, the use of coal instigated advances in metallurgy .petroleum from natural seepage has been used since ancient times for lighting, lubrication and waterproofing. The introduction of drilling for oil greatly increased the s upply of oil. The industrial revolution switches in to high gear. One problem is that the natural seepage is limited and in a few years the elements will be used. The development of nuclear power was touted as the answers to all mankinds energy woes. It not turned out that way. The elimination of government subsidies for nuclear power plants has made them quite unaffordable. When it went so bad no insure in the world will write disaster for nuclear power plant The concept of OTEC (ocean thermal energy conversion) has existed for over a century as fantasised by Jules Verne in 1870 and conceptualised by French physicist, Jacques arsene d arsonval in 1881. Despite this an operating OTEC power facility was not developed until the 1920s. 2.2 WHAT IS OTEC OTEC, ocean thermal energy conversion is an energy technology that converts solar radiation to electric power. OTEC systems use the oceans natural thermal gradient, consequently the temperature difference between the warm surface water and the cold deep water below 600 metres by about 20c, an OTEC system can produce, a significantly amount of power. The oceans are thus a vast renewable resource; with the potential to help us in the OTEC process is also rich in nutrients and it can be used to culture both marine organism and plant life near the shore or on land The total influx of solar energy into earth is of thousands of time as a great as mankind total energy use. All of our coal, oil and natural gas are the result of the capture of solar energy by life of the past. There have been, any projects for harnessing solar energy, but most have not been successful because they attempt to capture the energy directly. The idea behind OTEC is the use of all a natural collectors, the se, instead of artificial collector. 2.3 HOW OTEC WORKS Warm water is collected on the surface of the tropical ocean and pumped by a warm water pump. The water is pumped through the boiler, where some of the water is used to heat the working fluid, usually propane or some similar material. The propane vapour expands through a turbine which is coupled to a generator that generating electric power. Cold water from the bottom is pumped through the condenser, where the vapour returns to the liquid state. The fluid is pumped back into the boiler. Some small fraction of the power from the turbine is used to pump the water through the system and to power other internal operations, but most of it is available as net power. There are two different kinds of OTEC power plants, the land based and the floating plant. First, land based power plants, the land based pilot plant will consist of a building. This building will contain the heat exchangers, turbines, generators and controls. It will be connected to the ocean via several pipes, and an enormous fish farm (100 football areas) by other pipes. Warm water is collected through a screened enclosure close to the store. A long pipe laid on the slope collects cold water. Power and fresh water are generated in the building by the equipment. Used water if first circulated in to the marine culture pond (fish farm) and then discharges by the third pipe in to the ocean, downstream from the warm water inlet. This is done so that the outflow does not reenter the plan, since re use of warm water would lower the available temperature difference. While, the other OTEC power plants is floating power plants, the floating power plant works in the same way as the land base d the apparent different is that the floating plant is floating. Where actually OTEC can be used, OTEC can be sited anywhere across about 60 million squares kilometres of tropical oceans anywhere there is deep cold water lying under warm surface water this generally means between the tropic of cancer and the tropic of Capricorn. Surface water is these regions, warmed by the sun, generally stys at 25 degrees Celsius or above. Ocean water more than 1000 meters below the surface is generally at about 4 degrees C. 2.4 TYPES OF OTEC There are three types of OTEC designs: open cycle, closed cycle and hybrid cycle. Closed cycle Closed cycle systems use fluid with a low boiling point, such as ammonia, to rotate a turbine to generate electricity. Here how it works. Warm surface sea water is pumped through a heat exchanger where the low boiling water point is vaporized. The expanding vapour turns the turbo generator, then clod, deep seawater pumped through a second heat exchanger condenses the vapour back into a liquid, which is then recycle through the system Open cycle Open cycle OTEC uses the tropical oceans warm surface water to make electricity. When warm seawater is placed in a low pressure container, it boils. The expanding steam drives a low pressure turbine attached to an electrical generator. The steam, which has left its slat behind in the low pressure container, is almost pure fresh water. It is condensed back into a liquid by exposure to cold temperature from deep oceans water Hybrid cycle Hybrid system combines the feature of both the closed cycle an open cycle system. In a hybrid system, warm seawater enters a vacuum chamber where it is flash evaporated into steam, similar to the open cycle evaporation process. The steam vaporizes a low boiling point fluid that drives a turbine to produce electricity 2.5 ADVANTAGES AND DISADVANTAGES OF OTEC The advantages of OTEC is the uses OF OTEC is clean, renewable, its natural resource. Warm surface seawater and cold water from the ocean depths replace fossil fuels to produce electricity. Second, its suitably designed OTEC plants will produce little or no carbon dioxide or other pollutant chemical Third, OTEC system can produce fresh water as well as electricity. This is a significant adapted in island areas where fresh water is limited, other there is enough solar energy received and stored in the warm tropical oceans surface layer to provide most, if not all, of present human energy needs and last the use of OTEC as a source of electricity will help reduce the state almost complete dependence on imported fossil fuels. The disadvantages of OTEC is produced electric at present would cost more than electricity generated from fossil fuels at theirs current costs. Second, OTEC plants must be located were a difference of about 20;c occurs year round. Ocean depths must be available fairly close to shore based facilities for economics operation. Floating plant ships could provide more flexibility. Third, there is no energy company will put money in this project because it only has been tested in very smell scale and last, the construction of OTEC plants and lying of pipes in coastal water may cause localised damage to reefs and near shore marine ecosystems. 2.6 ENVIRONMENTAL IMPACTS OF OTEC OTEC systems are, for the most part, environmentally benign. Although accidental leakage of closed cycle working fluids can pose a hazard, under normal conditions, the only effluents are the mixed seawater discharges and dissolved gases that come out of solution when sea water is depressurized. Although the quantities of outgassed species may be significant for large OTEC systems, with the exception of carbon dioxide, these species are benign. Carbon dioxide is a greenhouse gas and can impact global climate; however, OTEC systems release one or two orders of magnitude less carbon dioxide than comparable fossil fuel power plants and those emissions may be sequestered easily in the ocean or used to stimulate marine biomass production. OTEC mixed seawater discharges will be at lower temperatures than sea water at the ocean surface. The discharges will also contain high concentrations of nutrients brought up with the deep sea water and may have a different salinity. It is important; ther efore, that release back into the ocean is conducted in a manner that minimizes unintended changes to the ocean mixed layer biota and avoids inducing long-term surface temperature anomalies. Analyses of OTEC effluent plumes suggest that discharge at depths of 50-100 m should be sufficient to ensure minimal impact on the ocean environment. Conversely, the nutrient-rich OTEC discharges could be exploited to sustain open-ocean Mari culture

Criteria for Performance Evaluation Essay -- Human Resource Management

Introduction Human resource policies and procedures are the most important aspects of developing acceptable organizational behavior in an organization. This is because mutual well-being, confidence, trust, and intelligence of all members of the organization determines the success of the organization hence the need to pay critical attention to it. The mid-sized manufacturing plant’s engineer hired for the modification of the plant had positive job performance credentials but poor interpersonal relations and tidiness at work place. This situation put the plant manager in a difficult position when it came to developing a well outline assessment of the engineer. Criteria for Performance Evaluation The three sets of performance evaluation mechanisms that brought concerns for the manager and the employee in the current evaluation structure included poor relationships with co-workers, personal characteristics, and behavior. These points of concern were particularly causing friction between the manager since the employee maintained that his performance was above reproach and produced results. However, despite the engineer’s concerns, the three most commonly used assessment criteria are behavior, performance standards, and skills and competency (Mayhew, 2010). Skills and competency refer to the solid technical knowledge an employee applies in accomplishing tasks. The ability to perform tasks for which one was hired and to meet organizational objectives set for him is fundamental in performance evaluation. Performance standards refer to what an employee must do to meet the manager’s expectations and normally include how proactive an employee is in handling his wo rk (Mayhew, 2010). The behavior of an employee is crucial bec... ...the use of external mechanisms on specific roles played by different employees. External evaluators minimize the impact of biases; promote strict professionalism and promotion of assessment by members of a similar profession, as well as the promotion of employee confidence in the organizations intentions. Works Cited Anonymous. (2009). Performance Appraisal Biases. Retrieved May 30, 2012, from Management Study Guide: http://managementstudyguide.com/performance-appraisal-bias.htm Kelchner, L., & Media, D. (2011). Three Common Performance Evaluation Methods. Retrieved May 30, 2012, from Small Business: http://smallbusiness.chron.com/three-common-performance-evaluation-methods-23608.html Mayhew, R. (2010). Job Performance Evaluation Criteria. Retrieved May 30, 2012, from e-How Money: http://www.ehow.com/info_8083608_job-performance-evaluation-criteria.html Criteria for Performance Evaluation Essay -- Human Resource Management Introduction Human resource policies and procedures are the most important aspects of developing acceptable organizational behavior in an organization. This is because mutual well-being, confidence, trust, and intelligence of all members of the organization determines the success of the organization hence the need to pay critical attention to it. The mid-sized manufacturing plant’s engineer hired for the modification of the plant had positive job performance credentials but poor interpersonal relations and tidiness at work place. This situation put the plant manager in a difficult position when it came to developing a well outline assessment of the engineer. Criteria for Performance Evaluation The three sets of performance evaluation mechanisms that brought concerns for the manager and the employee in the current evaluation structure included poor relationships with co-workers, personal characteristics, and behavior. These points of concern were particularly causing friction between the manager since the employee maintained that his performance was above reproach and produced results. However, despite the engineer’s concerns, the three most commonly used assessment criteria are behavior, performance standards, and skills and competency (Mayhew, 2010). Skills and competency refer to the solid technical knowledge an employee applies in accomplishing tasks. The ability to perform tasks for which one was hired and to meet organizational objectives set for him is fundamental in performance evaluation. Performance standards refer to what an employee must do to meet the manager’s expectations and normally include how proactive an employee is in handling his wo rk (Mayhew, 2010). The behavior of an employee is crucial bec... ...the use of external mechanisms on specific roles played by different employees. External evaluators minimize the impact of biases; promote strict professionalism and promotion of assessment by members of a similar profession, as well as the promotion of employee confidence in the organizations intentions. Works Cited Anonymous. (2009). Performance Appraisal Biases. Retrieved May 30, 2012, from Management Study Guide: http://managementstudyguide.com/performance-appraisal-bias.htm Kelchner, L., & Media, D. (2011). Three Common Performance Evaluation Methods. Retrieved May 30, 2012, from Small Business: http://smallbusiness.chron.com/three-common-performance-evaluation-methods-23608.html Mayhew, R. (2010). Job Performance Evaluation Criteria. Retrieved May 30, 2012, from e-How Money: http://www.ehow.com/info_8083608_job-performance-evaluation-criteria.html

Romeo: Static Character

Throughout the play we see that Romeo’s impulsive decisions land him in onerous situations. His capricious behavior is demonstrated through his rash love when he immediately moves on, without remorse or second thoughts, from Rosaline to Juliet whom he falls in love with instantly after laying eyes on her. Prior to seeing Juliet, Romeo talks about his infatuation with Rosaline, and the torment he suffers when he finds she does not love him back. Upon searching for her at the Capulet’s party, sees Juliet, when he says, â€Å"Did my heart love till now?Forswear it, sight! For I ne’er saw true beauty till this night,† (i. V. 51). His immediate transition between lovers proves that his love for Juliet was impulsive and irrational. When Romeo hears of Juliet’s death, he says to himself, â€Å"Well Juliet, I will lie with thee tonight. Let’s see for means. † (V. i. 34). His first thought is that if Juliet is dead, he must dies too. Without co nsidering any other options or going to Friar Laurence for further details, he acts on a whim and kills himself, when in reality Juliet isn’t actually dead.These actions prove Romeo as a static character because throughout the course of the play, when his love for Juliet ignites, comes to an end, and in other situations, Romeo does not think his decisions through and acts on impulse. Romeo is in love with the idea of being in love. Instead of using his head, Romeo only defines love with his eyes and heart. When it comes to emotions, Romeo is ardent about being in love. Because he unconditionally loves many characters throughout the play, it causes major conflicts.This makes him static because during the play he always lets love, and other emotions, get in the way and never learns from his mistakes. When Tybalt wants a duel Romeo says, â€Å"To such a greeting. Villain am I none,† (III. i. 63) and backs down. After Tybalt starts to insult Romeo, Mercutio gets in between them and is then killed by Tybalt. â€Å"Now, Tybalt, take the ‘villain’ back again that late thou gav’st me; for Mercutio’s soul,† (III. i. 125) Romeo bellows before he stabs Tybalt.Because Romeo loves his friend, he lets his emotions take over and without thinking through his actions, carries them out no matter the consequences. To further prove that this is a static behavior, when Romeo goes to see the Friar and tells him about his love for Juliet the Friar says, â€Å"Women may fall, when there’s no strength in men. † (II. iii. 76) By this the Friar means that *women can be excused for being weak, since mean are not stronger. * This has happened to Romeo many times, and this makes him weak and irresponsible when it comes to love.

Perception or how one is perceived gives an impression of...

Perception or how one is perceived gives an impression of influential characteristics to share empowerment, mentorship, trustworthiness and consistency. On the other hand, false assumptions can be made determining the body language or mood swing of an individual. The facts are that no one person’s emotions are the same every day, all day. Through actions, body language, and manner of speaking, individuals attempt to influence the perceptions that others have of them. The attempt to influence others’ perceptions of oneself has been called impression management. Managers manage impressions of themselves by how they talk their overall style, their office location and furniture and even by the individuals they select as employees (Bethel†¦show more content†¦63). The editor in this case study had a chance to speak with Bill on another occasion. Bill was more relaxed this time; he was at ease with his conversation. Instead of him sitting behind his desk in a more dominant role, Bill decided to speak with the editor in a face to face conversation while sitting in the other visitor’s chair. It appeared that Bill was not always in a take charge mind set, however, he knew how to differentiate between being serious and supportive. As we began to accept people for who they are it creates an environment of creativeness, trust, respect and openness. An individual’s experiences values, beliefs, through habits and interests shape our worldview and create our own unique set of filters (Bethel, 2011). For instance, the editor was able to add value to his own office by rearranging his furniture to modify his management style. What works for one, can work for another individual. The case writer pays close attention to detail, he is willing to be of service, and he was patient and a good listener. The moral of the story is that each individual person mood elevator travels depending on the occurrence. An individual can modify th eir behavior by listening, talking, asking questions, and learning from others. Attributes of others can influence our behavior; it can either be good or bad. Other type ofShow MoreRelatedWhat Is The Story Of A Short Story807 Words   |  4 Pages This story is significant because it shows how the african tribes choose their own over all the money and or power they could have, but would prefer to protect their own. This is a story about a boy who gets hit by a very venomous snake and this snake shoots the venom into the eyes of the little white boy. This snake will blind you and there was no cure for it. But this little black boy who had grown up with the white boy. There are many messages in this short story but the three main ones areRead MoreZita Story1431 Words   |  6 PagesRotor‟s  Zita, to simply put, is a  story about young girl who falls in love with  her teacher while he teaches  her how be a lady. Zita, the story‟s namesake, comes home to tell  her father, Don Eliodoro, about the new teacher who comes to herschool. This event takes place after the  speaker narrates the scene where Francisco B.  Reteche, the teacher, is taken toAnayat by a fisherman named, Turong. Mr.  Reteche is though t to be a strange  person by the villagers who have  becomeaware of his presence because  ofRead MoreThe Danger of a Single Story804 Words   |  4 PagesRanda ElFouly The Danger of a Single Story - A speech that was said by Chimamanda Adichie that inspired me to write this report. Chimamanda Adichie began talking about this thing she liked to call â€Å"a single story.† The Danger of a Single Story is about having a one sided perspective on different cultures and countries. She explains that she originally had a single story of writing because as a kid, all she had read were children’s books from America or England and all the characters in theseRead MoreA Story Of An Hour1289 Words   |  6 PagesMost stories have more than one conflict, some bigger than others, but all important as a story progressives to the very moment everything clicks and comes together. After that point, the story starts to wind down, lose ends are tied, and the reader gets the satisfying feeling of a happy ending. The Story of an Hour is not your typical short story; but is similar to others in the way that conflicts are the leading force behind a short story. This story starts with Mrs. Mallard finding out any wife’sRead MoreThe Story Within the Story: Who Moved My Cheese Essay1082 Words   |  5 PagesSpencer Johnson uses a story within a story to attempt t o catch the reader off-guard and ready for a teachable moment. In the context of a class reunion discussion, the friends begin to catch up and share what has happened in their lives over the years. Some have had success and others have had frustration in their lives. One Character had found the story of Who Moved My Cheese and credited that story as a rich source of help and guidance in navigating the changes of life. From the setting of revealedRead MoreHow Theme Shapes a Story632 Words   |  3 Pages How Theme Shapes a Story By Trina Carr English 125 Instructor: Clifton Edwards Running Head: Theme page 1 Like many people who haven’t studied literature, if someone asked me what the theme of a story was, I would have given a synopsis of the story detailing the actions and characters in it. As I have come to learn, theme is much more than a distilled retelling of a story. Theme gives a story a deeper meaning. TheRead MoreAnalysis Of The Story The Story Of An Hour Essay1554 Words   |  7 Pages T/R 5:40PM TO 9:00PM WOLFSON CAMP ANALYSIS OF FEMALE CHARACTERS IN â€Å"THE STORY OF AN HOUR† â€Å"HILLS LIKE WHITE ELEPHANTS† AND â€Å"THE CHRYSANTHEMUMS† JUAN FELIX CASTILLO BATISTA PROFESOR JOSEPH FALLAD This essay is an attempt to describe the females’ characters between three of the most powerful short stories I ever read. My goal is to describe and compare three different women, in their different circumstances and environments. IRead MoreThe Danger Of A Single Story By Chimamanda Adichie1442 Words   |  6 PagesI think it is safe to say that many, if not all of us can think of at least one and have maybe even gone to believe it. In the article â€Å"The Danger of a Single Story† by Chimamanda Adichie, she explains that untrue and incomplete stereotypes are formed when hear only one side of a story. Adichie further supports her idea that single stories create untrue and incomplete stereotypes by providing us with multiple examples and experiences from her own life. She begins her article talking about her firstRead MoreThe Story of the Aged Mother Japanese Folktales1554 Words   |  7 PagesTHE STORY OF THE AGED MOTHER A Japanese Folktale by MATSUO BASHOLong, long ago there lived at the foot of the mountain a poor farmer and his aged, widowedmother. They owned a bit of land which supplied them with food, and their humble werepeaceful and happy.Shining was governed by a despotic leader who though a warrior, had a great and cowardlyshrinking from anything suggestive of failing health and strength. This caused him to send out acruel proclamation. The entire province was given strict ordersRead MoreStory of an Hour619 Words   |  3 PagesAmanuel Tekle English 102 3/2/2014 â€Å"The story of an hour† is a short story written by Kate Chopin. According to Wikipedia, she was born Katherine O’Flaherty on February 8, 1850, in St. Louis, Missouri. She was an American author of short stories and novels. She is now considered by some to have been a forerunner of feminist authors of the 20th century. â€Å"The story of an hour† was written on April 19, 1894 but was originally published in Vogue on December