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Theoretical and experimental investigations of thermoelectric heating system with multiple ventilation channels

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  • Liu, Di
  • Zhao, Fu-Yun
  • Yang, Hongxing
  • Tang, Guang-Fa

Abstract

In the present work, an open-type thermoelectric heating system with multiple channels was developed. A mathematical model of heat transfer, based on one-dimensional treatment of thermal and electric power, is conducted. The heating coefficient and production are both correlated in terms of temperature difference, thermal conductivity, electric resistance and electric current. The looped air circulation was designed to simultaneously recycle heat and enhance heater system performance. Experimental investigations were conducted to identify thermal performance of the thermoelectric heater. Effects of airflow rates through the heating side and cooling side, temperatures of heating side and cooling side on the performance were investigated. The heating coefficient was calculated upon that surface temperatures of hot and cold sides were recorded. The results show that the average heating coefficient of the thermoelectric heating system could reach to 1.3, which is greater than that of a typical electric heater with heating coefficient of less than one. The optimal isolation thickness for this thermoelectric heater, i.e., 14mm, is confirmed by the experimental rig system. Generally, heating coefficient was found to increase first and decrease afterwards when the current was continuously increasing. Analytical and experimental results demonstrate that the optimum performance of the thermoelectric heat recovery heater strongly depends on the intensities of these operating parameters.

Suggested Citation

  • Liu, Di & Zhao, Fu-Yun & Yang, Hongxing & Tang, Guang-Fa, 2015. "Theoretical and experimental investigations of thermoelectric heating system with multiple ventilation channels," Applied Energy, Elsevier, vol. 159(C), pages 458-468.
    • Handle: RePEc:eee:appene:v:159:y:2015:i:c:p:458-468
    DOI: 10.1016/j.apenergy.2015.08.125
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    References listed on IDEAS

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    Cited by:

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    5. Lv, Hao & Wang, Xiao-Dong & Wang, Tian-Hu & Cheng, Chin-Hsiang, 2016. "Improvement of transient supercooling of thermoelectric coolers through variable semiconductor cross-section," Applied Energy, Elsevier, vol. 164(C), pages 501-508.
    6. Lan, Yuncheng & Lu, Junhui & Li, Junming & Wang, Suilin, 2022. "Effects of temperature-dependent thermal properties and the side leg heat dissipation on the performance of the thermoelectric generator," Energy, Elsevier, vol. 243(C).
    7. Irshad, Kashif & Habib, Khairul & Basrawi, Firdaus & Saha, Bidyut Baran, 2017. "Study of a thermoelectric air duct system assisted by photovoltaic wall for space cooling in tropical climate," Energy, Elsevier, vol. 119(C), pages 504-522.
    8. Daniarta, S. & Sowa, D. & Błasiak, P. & Imre, A.R. & Kolasiński, P., 2024. "Techno-economic survey of enhancing Power-to-Methane efficiency via waste heat recovery from electrolysis and biomethanation," Renewable and Sustainable Energy Reviews, Elsevier, vol. 194(C).
    9. Kwan, T.H. & Shen, Y. & Pei, G., 2021. "Recycling fuel cell waste heat to the thermoelectric cooler for enhanced combined heat, power and water production," Energy, Elsevier, vol. 223(C).
    10. Cai, Yang & Zhang, Dong-Dong & Liu, Di & Zhao, Fu-Yun & Wang, Han-Qing, 2019. "Air source thermoelectric heat pump for simultaneous cold air delivery and hot water supply: Full modeling and performance evaluation," Renewable Energy, Elsevier, vol. 130(C), pages 968-981.
    11. Sadighi Dizaji, Hamed & Jafarmadar, Samad & Khalilarya, Shahram & Moosavi, Amin, 2016. "An exhaustive experimental study of a novel air-water based thermoelectric cooling unit," Applied Energy, Elsevier, vol. 181(C), pages 357-366.
    12. Luo, Yongqiang & Zhang, Ling & Liu, Zhongbing & Wu, Jing & Zhang, Yelin & Wu, Zhenghong & He, Xihua, 2017. "Performance analysis of a self-adaptive building integrated photovoltaic thermoelectric wall system in hot summer and cold winter zone of China," Energy, Elsevier, vol. 140(P1), pages 584-600.
    13. Chen, Lingen & Lorenzini, Giulio, 2023. "Heating load, COP and exergetic efficiency optimizations for TEG-TEH combined thermoelectric device with Thomson effect and external heat transfer," Energy, Elsevier, vol. 270(C).
    14. Lan, Song & Smith, Andy & Stobart, Richard & Chen, Rui, 2019. "Feasibility study on a vehicular thermoelectric generator for both waste heat recovery and engine oil warm-up," Applied Energy, Elsevier, vol. 242(C), pages 273-284.
    15. Ramakrishnan Iyer & Aritra Ghosh, 2023. "Investigation of Integrated and Non-Integrated Thermoelectric Systems for Buildings—A Review," Energies, MDPI, vol. 16(19), pages 1-17, October.

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