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Transient behavior of concentrated solar oxide thermoelectric generator

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  • Mahmoudinezhad, S.
  • Rezania, A.
  • Cotfas, P.A.
  • Cotfas, D.T.
  • Rosendahl, L.A.

Abstract

Solar thermoelectric generators (STEGs) can directly harness solar energy for power generation. Experimental and numerical studies on the transient response of an oxide thermoelectric generator (TEG) to variation of solar radiation in semi-cloudy weather are carried out. In the first phase, performance of a STEG is investigated under variable solar radiation. Furthermore, effect of a self-adhesive graphite sheet attached to the hot surface of the STEG on enhancement of thermal and electrical performance is studied. In order to evaluate the system performance at high solar concentrations and high operation temperatures, numerical simulation is performed using finite volume method (FVM). I-V-P curves for both STEG systems, with and without the graphite sheet, are obtained. Variation of the hot and cold side temperatures of the TEG and maximum output power variations versus the time are presented and discussed. The results show that, the graphite absorber has a substantial effect on the power generation by the TEG by enhancement of absorbed radiation. This impact is more noticeable at higher solar concentrations and higher temperatures.

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  • Mahmoudinezhad, S. & Rezania, A. & Cotfas, P.A. & Cotfas, D.T. & Rosendahl, L.A., 2019. "Transient behavior of concentrated solar oxide thermoelectric generator," Energy, Elsevier, vol. 168(C), pages 823-832.
    • Handle: RePEc:eee:energy:v:168:y:2019:i:c:p:823-832
    DOI: 10.1016/j.energy.2018.12.001
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    References listed on IDEAS

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    1. Kossyvakis, D.N. & Vossou, C.G. & Provatidis, C.G. & Hristoforou, E.V., 2015. "Computational analysis and performance optimization of a solar thermoelectric generator," Renewable Energy, Elsevier, vol. 81(C), pages 150-161.
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    1. Mahmoudinezhad, S. & Cotfas, D.T. & Cotfas, P.A. & Skjølstrup, Enok J.H. & Pedersen, K. & Rosendahl, L. & Rezania, A., 2022. "Experimental investigation on spectrum beam splitting photovoltaic–thermoelectric generator under moderate solar concentrations," Energy, Elsevier, vol. 238(PC).
    2. Cotfas, D.T. & Enesca, A. & Cotfas, P.A., 2024. "Enhancing the performance of the solar thermoelectric generator in unconcentrated and concentrated light," Renewable Energy, Elsevier, vol. 221(C).
    3. Petru Adrian Cotfas & Daniel Tudor Cotfas, 2020. "Comprehensive Review of Methods and Instruments for Photovoltaic–Thermoelectric Generator Hybrid System Characterization," Energies, MDPI, vol. 13(22), pages 1-32, November.

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