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Influences of external heat transfer and Thomson effect on the performance of TEG-TEC combined thermoelectric device

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Abstract

A thermodynamic model of a thermoelectric generator (TEG)-driven thermoelectric cooler (TEC) device considering Thomson effect and external heat transfer (HT) is established based on the combination of non-equilibrium and finite time thermodynamic theories. The expressions of cooling capacity and coefficient of performance (COP) are obtained. Performances are compared with and without considering Thomson effect using numerical optimization method. The influences of Thomson effect on the optimal performances, optimum allocations of thermoelectric (TE) element number and HT surface area are discussed. The results indicate that Thomson effect decreases the maximum cooling capacity and COP. More TE elements should be allocated to TEG, and more HT area should be allocated to the heat exchanger (HEX) of TEG, the hot-side HEX of TEG and the cold-side HEX of TEC in the design of the device considering Thomson effect. The results obtained can be used to help design TEG-TEC devices.

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Authors and Affiliations

  1. Institute of Thermal Science and Power Engineering, Naval University of Engineering, Wuhan, 430033, China

    YuanLi Feng, LinGen Chen, FanKai Meng & FengRui Sun

  2. Military Key Laboratory for Naval Ship Power Engineering, Naval University of Engineering, Wuhan, 430033, China

    YuanLi Feng, LinGen Chen, FanKai Meng & FengRui Sun

  3. College of Power Engineering, Naval University of Engineering, Wuhan, 430033, China

    YuanLi Feng, LinGen Chen, FanKai Meng & FengRui Sun

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  1. YuanLi Feng
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Feng, Y., Chen, L., Meng, F. et al. Influences of external heat transfer and Thomson effect on the performance of TEG-TEC combined thermoelectric device. Sci. China Technol. Sci. 61, 1600–1610 (2018). https://doi.org/10.1007/s11431-017-9223-5

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