TY - JOUR
T1 - Radiative cooling-assisted thermoelectric refrigeration and power systems
T2 - Coupling properties and parametric optimization
AU - Liao, Tianjun
AU - Xu, Qidong
AU - Dai, Yawen
AU - Cheng, Chun
AU - He, Qijiao
AU - Ni, Meng
N1 - Funding Information:
This work has been supported by the Scientific Research Foundation (Grant No. 2019ZD22 ) and the Teaching Reform and Practice Project (Grant No. 2020YB29 ) of Chongqing University of Technology , the Science and Technology Research Program of Chongqing Municipal Education Commission (Grant No. KJQN201901144 ), the Innovation Program for Overseas Researchers Returning Home support by Chongqing Human Resources and Social Security Bureau (Grant No. cx2021127 ), Innovation program for Overseas Students Returning to China support by Chongqing Human Resources and Social Security Bureau (Grant No. 2019ZD22 ), and the Chongqing Research Program of Basic Research and Frontier Technology ( cstc2020jcyjmsxmX0001 ), People's Republic of China. M. NI also thanks the financial support by Hong Kong Polytechnic University (Project ID: P0014036 , account: G-YW3T).
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021
Y1 - 2021
N2 - 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.
AB - 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.
KW - Atmospheric window
KW - Radiative cooling
KW - Thermal-electrical properties
KW - Thermoelectric generator (TEG)
KW - Thermoelectric refrigerator (TER)
UR - http://www.scopus.com/inward/record.url?scp=85119042063&partnerID=8YFLogxK
U2 - 10.1016/j.energy.2021.122546
DO - 10.1016/j.energy.2021.122546
M3 - Journal article
AN - SCOPUS:85119042063
SN - 0360-5442
JO - Energy
JF - Energy
M1 - 122546
ER -
