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PERFORMANCE PREDICTION OF MICRO THERMOELECTRIC GENERATOR USING RECTANGULAR-FIN ELEMENTS BY QUASI 3-D SIMULATIONS BASED ON POROUS MEDIUM MODEL

DOI: 10.1615/IHTC13.p22.280
12 pages

Yutaka Oda
Kansai University, 3-3-35, Yamate-cho, Suita, Osaka 564-8680, Japan

H. Yoshida
Kyoto University, Japan

Hiroshi Iwai
Department of Mechanical Engineering, Department of Aeronautics and Astronautics, Kyoto University, Nishikyo-ku, Kyoto 615-8540, Japan

M. Saito
Kyoto University, Japan

Sinopsis

A complete performance prediction was carried out for a micro thermoelectric power generator that employs rectangular-fin elements and regenerative combustion, which means that the combustion gas is utilized to preheat the working gas. In the analysis, an array of rectangular-fin elements and hot- and cold-side gases were modeled as a fluid-saturated porous medium bounded by a solid wall. After the validation of the porous medium model, quasi three-dimensional simulations were conducted by considering the heat and electric current flow along the flow direction. For an element thickness t of 0.5 mm, it was found that the overall conversion efficiency from total heat input to electrical energy exceeds 3% as a target at an electrical power to pumping power ratio of more than three and a volumetric power density of more than 30 mW/cm3.

IHTC-13 Digital Library

Measurement of fluid temperature with an arrangement of three thermocouples FLOW BOILING OF A HIGHLY VISCOUS POLYMER SOLUTION