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Title: 海洋温度差発電の熱力学的考察
Other Titles: Thermodynamic Consideration of Electrical Power Generated by Temperature Difference of Ocean Water
Authors: 濱田, 圭之助
Authors (alternative): Hamada, Keinosuke / 浜田, 圭之助
Issue Date: 28-Feb-1989
Publisher: 長崎大学教育学部
Citation: 長崎大学教育学部自然科学研究報告. vol.40, p.25-32; 1989
Abstract: Japan produces less natural resoures, so it is the most important problem for Japan to develop a perennial natural energy. One of them, an electrical power generated by temperature difference of a ocean wather (EPTD) has been exploited for practical use. The EPTD is generated by expansion of liquefied ammonia, but electrical power produced by wather vapor (EPWV) is generated by thermal expansion of water vapor. Therefore, the EPTD system has an extra equipment for liquefaction of ammonia, comparing with the EPWV system, because an ammonia of b. p. -33.5℃ can not be liquefied by only cooling the ammonia gas which is vaporized from the liquid ammonia, using the bottom water (~4.5℃) of deep ocean. The thermodynamics says that the thermal engine can not obtain 100% efficiency with every efforts, because of the energy loss which is inevitable to the thermal engine. The thermodynamic calculation of the thermal energy which is necessary for obtaining some electrical energy shows that the ratio of the energy for the EPWV system to the energy of the EPTD is 1:17. It means that the EPTD system wastes more fossil fuels than the obtained perennial natural energy.
URI: http://hdl.handle.net/10069/32444
ISSN: 0386443X
Type: Departmental Bulletin Paper
Text Version: publisher
Appears in Collections:No. 40

Citable URI : http://hdl.handle.net/10069/32444

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