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International Heat Transfer Conference 13
Graham de Vahl Davis (open in a new tab) School of Mechanical and Manufacturing Engineering, University of New South Wales, Kensington, NSW, Australia
Eddie Leonardi (open in a new tab) Computational Fluid Dynamics Research Laboratory, School of Mechanical and Manufacturing Engineering, The University of New South Wales, Sydney, Australia 2052

ISSN Online: 2377-424X

ISBN CD: 1-56700-226-9

ISBN Online: 1-56700-225-0

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

page 12
DOI: 10.1615/IHTC13.p22.280
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要約

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.

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