期刊
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
卷 60, 期 8, 页码 1168-1174出版社
SCIENCE PRESS
DOI: 10.1007/s11431-017-9079-6
关键词
thermoelectric generation; graphene-water nanofluid; power generation
资金
- National Natural Science Foundation of China [51590902, 51476095]
- Natural Science Foundation of Shanghai [14ZR1417000]
- Key Subject of Shanghai Polytechnic University (Material Science and Engineering) [XXKZD1601]
- Program for Professor of Special Appointment (Young Eastern Scholar) at Shanghai Institutions of Higher Learning [QD2015052]
Improvement of the heat transfer effect of cold side of a thermoelectric generator (TEG) is one of the approaches to enhance the performance of the TEG systems. As a new type of heat transfer media, nanofluids can enhance the heat transfer performance of working liquid significantly. In this study, the performance of a commercial TEG with graphene-water (GW) nanofluid as coolants in a minichannel heat exchanger is investigated experimentally at low temperatures. The results show that the output power of TEG increases with the flow rate under 950 mL/min. However, the fluid flow rate has no influence on the output power of TEG with higher flow rate (larger than 950 mL/min) when the heat transfer dynamic balance state of the system is reached. The optimal concentration and flow rate of nanofluid are 0.1 wt% and 950 mL/min, respectively. At the optimal conditions, the improved voltage, output power and conversion efficiency with GW nanofluid applied in the cooling system are increased by 11.29%, 21.55% and 3.5% in comparison with those with only water applied, respectively.
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