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Power generation characteristics of a sandwich-type self-heating thermoelectric generator with spatially varying embedded heat source

Title
Power generation characteristics of a sandwich-type self-heating thermoelectric generator with spatially varying embedded heat source
Authors
Shin S.Bang S.Choi J.Son H.-J.Yoon H.Yun H.Choi J.-H.Wee D.
Ewha Authors
최정현위대현
SCOPUS Author ID
최정현scopus; 위대현scopus
Issue Date
2015
Journal Title
International Journal of Energy Research
ISSN
0363-907XJCR Link
Citation
vol. 39, no. 6, pp. 851 - 859
Keywords
EfficiencyHeat transferPower densityRadioactive isotopesSpatial variationThermoelectric generators
Publisher
John Wiley and Sons Ltd
Indexed
SCIE; SCOPUS WOS scopus
Abstract
Summary: Power generation characteristics of a sandwich-type thermoelectric generator in which the heat source is embedded into thermoelectric elements are investigated. Our previous work on a similar concept only considered a uniform heat source distribution inside thermoelectric elements. In this work, the effect of the spatial distribution of a heat source is examined. In particular, the effect of the concentration of heat source near the one end, that is, the hot end, is intensively studied as a potential means of improving the efficiency of the device. Although the effects of heat source concentration in impractical cases without heat transfer limitations on the cold side remain ambiguous, it become clear that heat source concentration indeed has positive effects in more realistic cases with finite heat transfer coefficients imposed on the cold side. Because of the relatively low efficiency of typical thermoelectric generation, a significant amount of heat must be dissipated from the cold end of the thermoelectric element. Greater heat source concentration near the hot end leads to more effective utilization of available heat source, reduces the amount of heat rejected at the cold end, and lowers the hot end temperature of the thermoelectric element. Overall, it is suggested that heat source concentration can be used as a method to achieve more efficient operation and better structural integrity of the system. © 2015 John Wiley & Sons, Ltd.
DOI
10.1002/er.3285
Appears in Collections:
엘텍공과대학 > 환경공학전공 > Journal papers
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