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title高温条件におけるSi-Ge型熱電変換素子の性能評価
Other TitlePerformance evaluation of Si-Ge thermoelectric conversion elements on high temperature condition
Author(jpn)岩田, 直子; 小川, 博之
Author(eng)Iwata, Naoko; Ogawa, Hiroyuki
Author Affiliation(jpn)宇宙航空研究開発機構宇宙科学研究本部; 宇宙航空研究開発機構宇宙科学研究本部
Author Affiliation(eng)Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS); Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)
Issue Date2009-06
PublisherInstitute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)
宇宙航空研究開発機構宇宙科学研究本部
Publication titleSpace Energy Symposium
宇宙エネルギーシンポジウム
Volume28
Publication date2009-06
Languagejpn
eng
AbstractRadio Isotope (RI) power generation is useful for deep space explorers. Thermoelectric conversion elements have been used as thermoelectric converter in the U.S. and Russia, known as radioisotope thermoelectric generator (RTG). Thermoelectric conversion elements for general use have been developed in Japan, but there are no examples of their application for RTG. Thermoelectric conversion elements for RTG must be operated on much higher temperature conditions than one for general use. Experiments were conducted to evaluate the conversion efficiency of Si-Ge thermoelectric conversion elements on high temperature condition (over 550 deg). We set a Si-Ge thermoelectric conversion module with a ceramic heater as a heat source instead of RI in our thermal vacuum chamber to imitate space environment. A radiator is equipped at low temperature side of module to dissipate heat. Generated module power was measured and conversion efficiency was calculated by power and heat that passed the module. Increasing the temperature difference between high and low temperature sides of module, both power and conversion efficiency increase. Conversion efficiency is about 0.015 % when temperature difference is 400 deg, that is much smaller than others. One of its reasons is large contact thermal resistances between heater and module and module and radiator. We plan to conduct additional thermal vacuum test after improve it. Besides, we'll conduct thermal design of whole RTG system.
Description会議情報: 第28回宇宙エネルギーシンポジウム(2009年3月9日, 宇宙航空研究開発機構宇宙科学研究本部相模原キャンパス)
Meeting Information: The twenty-eight Space Energy Symposium (March 9, 2009. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara)
KeywordsThermoelectric Conversion Elements, Space Environment, Conversion Efficiency
Document TypeConference Paper
JAXA Categoryシンポジウム・研究会
NCIDAN10324356
SHI-NOAA0064295006
URIhttps://repository.exst.jaxa.jp/dspace/handle/a-is/14158


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