DocumentCode :
3164227
Title :
Feasibility study on applying thermoelectric SiC ceramics for supersonic aerodynamic heat recovery
Author :
Xiaoyi Han ; Haifeng Cheng ; Jun Wang
Author_Institution :
Nat. Key Lab. of Sci. & Technol. on Adv. Ceramic Fibers & Composites, Nat. Univ. of Defense Technol., Changsha, China
Volume :
2
fYear :
2014
fDate :
19-21 Aug. 2014
Firstpage :
485
Lastpage :
489
Abstract :
SiC ceramics are widely serving as ceramic composites matrix materials of high-velocity vehicles structures against extremely heating and oxidation for their sustainability at high temperature, and are also high temperature thermoelectric materials, which can transfer heat to electricity by temperature difference. Both of these advantages brought out an idea of generating electricity from aerodynamic heat by thermoelectric SiC structures on supersonic vehicles. A simple nose-tip thermoelectric module is set up, in this work, to predict the thermoelectric performance of SiC ceramics in a supersonic air flow environment (Mach number 3). The flow field parameters, temperature difference and temperature distributions of the module have been simulated by computational fluid dynamics methods. The thermoelectric performance and effect of Thomson heat were discussed. The maximum power output and energy efficiency reaches 0.0027 W and 0.0036 %, respectively, at 230 K temperature difference and a current of 0.122 A. The Thomson heat increases directly with the output current, and at a current above 0.15 A, over 50 % of the generated power has been turned back to thermal heat, resulting in the effective output power as well as energy efficiency decrease rapidly. The thermoelectric efficiency would be increased on higher-speed vehicles by enlarged temperature difference.
Keywords :
Thomson effect; aircraft; ceramic insulation; computational fluid dynamics; heat recovery; silicon compounds; supersonic flow; temperature distribution; thermoelectric conversion; SiC; SiC ceramics; Thomson heat; ceramic composites matrix materials; computational fluid dynamics methods; current 0.122 A; efficiency 0.0036 percent; flow field parameters; high temperature thermoelectric materials; nose-tip thermoelectric module; power 0.0027 W; supersonic aerodynamic heat recovery; supersonic air flow environment; supersonic vehicles; temperature 230 K; temperature difference; temperature distributions; thermoelectric SiC structures; thermoelectric efficiency; thermoelectric performance; Ceramics; Heating; Power generation; Resistance; Silicon carbide; Temperature distribution; Vehicles; SiC composites; heat recovery; supersonic vehicles; thermoelectric conversion;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Materials for Renewable Energy and Environment (ICMREE), 2013 International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4799-3335-8
Type :
conf
DOI :
10.1109/ICMREE.2013.6893716
Filename :
6893716
Link To Document :
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