Journal
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
Volume 114, Issue -, Pages 656-663Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijheatmasstransfer.2017.06.102
Keywords
Two-stage thermoelectric cooler; Transient supercooling; Separate current pulse; Cold end temperature; Holding time
Categories
Funding
- National Science Fund for Distinguished Young Scholars of China [51525602]
- Fundamental Research Funds for the Central Universities [2017ZZD006]
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As compared with single-stage thermoelectric coolers (TECs), two-stage TECs can achieve a larger temperature drop when TECs operate at steady state conditions. In this work, pulse currents are respectively supplied to the hot and the cold stage of a two-stage cascaded TEC to seek further increase in temperature drop across the TEC. The results show that the two-stage TEC yields a lower cold end temperature and a longer holding time of supercooling state than the single-stage counterpart. The minimum cold end temperature, T-c,T-min, can be further improved by the matching between the pulse amplitude and width on the cold stage (P-c and tau(c)) and the pulse amplitude and width on the hot stage (P-h and tau(h)). When P-c and tau(c) are specified, the same P-h (=P-c) and a shorter tau(h) (
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