Radiative cooling-assisted thermoelectric refrigeration and power systems: Coupling properties and parametric optimization

Tianjun Liao, Qidong Xu, Yawen Dai, Chun Cheng, Qijiao He and Meng Ni

Energy, 2022, vol. 242, issue C

Abstract: A CP2–127–06 Melcor module is incorporated into a radiative cooling (RC) system to work as a thermoelectric refrigerator (TER) at daytime and a thermoelectric generator (TEG) in nighttime. Through analysis of the single RC system, only a small temperature span between environment and building can be achieved. However, the temperature span can be significantly improved by combining RC and TER. The TER's input electrical current is optimized to obtain the maximum coefficient of performance (COP) 4.85 and the maximum cooling power density (CPD) 9.64 × 103 W m−2. Making trade-off between COP and CPD, the optimal regions of the COP, CPD, temperatures of cold side and hot side, and electrical current are determined. Further, the RC-TEG system's maximum power density 5.10 W m−2 and maximum efficiency 0.369% and the corresponding optimal conditions are obtained. With increasing the area ratio of emitter to TER or TEG, the performances of the systems are firstly improved and then remain almost unchanged. This work may provide guidance for building's thermal management at daytime and power generation in nighttime.

Keywords: Radiative cooling; Thermoelectric refrigerator (TER); Thermoelectric generator (TEG); Thermal-electrical properties; Atmospheric window (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:242:y:2022:i:c:s036054422102795x

DOI: 10.1016/j.energy.2021.122546

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