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外文翻译温差发电技术的研究进展及现状.doc
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1、Thermoelectric power generation, also called thermoelectric power generation, is a kind of green environmental protection. The thermoelectric power generation technology has the advantages of simple structure, strong and durable, no moving parts, no noise, long service life, etc. Can make reasonable
2、 use of solar energy, geothermal energy, industrial waste heat and low grade energy into electricity. The research of thermoelectric power generation technology began in 1940s. Because of its significant advantages, thermoelectric power generation in aviation, military and other fields has been wide
3、ly used, the United States, former Soviet Union has developed a thousands of radioisotope or nuclear reactor temperature difference generator used as empty asked, marine equipment of power supply. With the increasing depletion of fossil energy, the United States, Japan, the European Union and other
4、developed countries pay more attention to the research of thermoelectric power generation technology in the civil field, and has made considerable progress. Research in domestic thermal power generation, mainly in electrical theory and thermoelectric materials by research, aimed at temperature hair
5、appliances optimization and provide theoretical guidance for the preparation of thermoelectric materials with excellent properties, although China is the world largest semiconductor thermoelectric device output country, but in the temperature difference hair appliances integrated design and applicat
6、ion research is still very lack. Therefore, the study of thermoelectric power generation has a very realistic significance. Is introduced in this paper principle of thermoelectric technology, reviews the research progress and status quo of domestic and foreign, to common commercial thermoelectric mo
7、dule as an example, the power generation efficiency of thermoelectric power generation in the presence of low, thermoelectricity component and short service life, reliability are analyzed, and countermeasures are put forward. With the improvement of the performance of thermoelectric materials and th
8、e increase of the reliability of thermoelectric components, the application of thermoelectric power generation has a broad prospect.1 working principle Complete the temperature difference, so that high temperature thermoelectric power is based on thermoelectric material Seebeck effect developed a po
9、wer generation technology, the P type and N type two kind of different types of thermoelectric materials (P type hole rich materials, N type is electron rich material) is connected to the formation of a PN junction, is placed in a high temperature state, and the other end is formed at low temperatur
10、e, due to the thermal excitation, p if there exists a locally connected) type material end hole (electron) concentration is higher than that of the low temperature end, so in this concentration gradient driven Bu, holes and electrons to the low temperature side diffusion, resulting in the formation
11、of electric potential thermoelectric materials through the low temperature end of the high temperature end of the input of heat energy directly into electrical energy. A PN junction alone, electromotive force can be formed is very small, and if so many series of PN junctionCome, can get enough high
12、voltage, become a thermoelectric power plant 2 domestic and international thermoelectric power generation technology research progress2.1 research progress in foreign countries Since the discovery of the Seebeck effect since 1821 Seebeck, foreign the thermoelectric generation of a large number of st
13、udies, in 1947, first the thermoelectric generator available, efficiency is only 1.5%. In 1953, Loffe academician research team successfully developed the use of coal oil lamps, tractor heat as a heat source of thermoelectric power plant, in the use of electricity difficult areas for small power sup
14、ply. In the sixties of the 20th century, some materials with good thermoelectric properties, the research upsurge of thermoelectric power generation reached a peak, especially the former Soviet Union and the United States, due to the promotion of national defense, military and other special industry
15、, application and development of thermoelectric generation technology rapidly. By the end of 1960s, the former Soviet Union has made more than 1000 radioactive isotope thermoelectric generator (RTG), which is widely used in satellite power supply, beacon and navigation mark, and its average service
16、life is more than 10 years. The United States is also unwilling to lag behind, and its development of the longest RTG workQuestion has been over 30 years. June 1961 U.S. SNAP-3A energy systems put into use, the output power of 2.7 W, power generation efficiency of 5.1%. The RTG output power, which w
17、as used on the launch of Jupiter and Saturn in 1977, has reached 155 W. In early 1980s, the United States completed the development of the 500-1 000 W military thermoelectric generator, and in the late 80s to enter the army equipment. With the energy crisis and environmental pollution, people began
18、to pay attention to the value of thermoelectric power generation in waste heat utilization, many countries have developed thermoelectric technology as a medium and long-term energy development plan. Japan launched a series of to solid waste combustion energy recovery research program in the title of
19、 the government plan is studied for the solid waste incineration furnace waste heat power generation technology, combining the turbines and thermoelectric generator, to achieve maximum utilization of the heat of the different scale garbage incineration. 2003 November U. S. Department of Energy annou
20、nced funded Pacific Northwest National Laboratory, Michigan Technology University and other units, focusing on their research in high performance thermoelectric materials and application technology, especially the use of industrial waste heat. In recent years, the utilization of the low grade heat s
21、ource has become the main direction of the research on the technology of thermal power generation. Maneewan, such as the use of steel plate placed on the roof of the solar collector to absorb the heat and the environment of the temperature difference between power generation, to drive the axial flow
22、 wind) L to guide the natural convection of the roof air, so as to cool the roof. Rida and so on, the thermal side of the thermoelectric generator is connected with the outer wall of the cooking stove in the country, and the cold end is arranged in the air, and the temperature of the furnace wall an
23、d the environment are used to generate electricity, and the output power is 4.2W. HASEBE et al. The summer high temperature surface as the heat source, heat exchange tube for the collector. By 19 groups of thermoelectric components. In the heat pipe liquid flow rate is 0.7 L / min, output power of 3
24、.6 w thacher, funded by the U. S. Department of energy and New York State Energy Research and development authority in the development of vehicle exhaust waste heat power generation system, the use of the group of 20 hz-20 thermoelectric module, thermoelectric materials for Bi te based materials, ve
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