Performance of a Composite Thermoelectric Generator with Different Arrangements of SiGe, BiTe and PbTe under Different ConfigurationsReportar como inadecuado




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1

Departamento de Termofluidos, Facultad de Ingenieria, Universidad Nacional Autónoma de México, Mexico 04510, Mexico

2

Instituto Politecnico Nacional, SEPI ESIME-CUL, Av. Santa Ana 1000, Culhuacan, Coyoacan 04430, Mexico



These authors contributed equally to this work.





*

Author to whom correspondence should be addressed.



Academic Editor: Kevin H. Knuth

Abstract In this study, we analyze the role of the thermoelectric TE properties, namely Seebeck coefficient α, thermal conductivity κ and electrical resistivity ρ, of three different materials in a composite thermoelectric generator CTEG under different configurations. The CTEG is composed of three thermoelectric modules TEMs: 1 two TEMs thermally and electrically connected in series SC; 2 two branches of TEMs thermally and electrically connected in parallel PSC; and 3 three TEMs thermally and electrically connected in parallel TEP. In general, each of the TEMs have different thermoelectric parameters, namely a Seebeck coefficient α, a thermal conductance K and an electrical resistance R. Following the framework proposed recently, we show the effect of: 1 the configuration; and 2 the arrangements of TE materials on the corresponding equivalent figure of merit Zeq and consequently on the maximum power Pmax and efficiency η of the CTEG. Firstly, we consider that the whole system is formed of the same thermoelectric material α1,K1,R1 = α2,K2,R2 = α3,K3,R3 and, secondly, that the whole system is constituted by only two different thermoelectric materials Entropy 2015, 17 7388 αi,Ki,Ri ≠ αj ,Kj ,Rj 6= αl,Kl,Rl, where i, j, l can be 1, 2 or 3. In this work, we propose arrangements of TEMs, which clearly have the advantage of a higher thermoelectric figure of merit value compared to a conventional thermoelectric module. A corollary about the Zeq-max for CTEG is obtained as a result of these considerations. We suggest an optimum configuration. View Full-Text

Keywords: thermoelectric module; thermoelectric properties; figure of merit thermoelectric module; thermoelectric properties; figure of merit





Autor: Alexander Vargas-Almeida 1,†, Miguel Angel Olivares-Robles 2,†,* and Federico Méndez Lavielle 1

Fuente: http://mdpi.com/



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