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Experimental Investigation on the Heat Transfer Characteristics of Multi-Point Heating Microchannels for Simulating Solar Cell Cooling

Author

Listed:
  • Qi Yang

    (Beijing Key Laboratory of Space Thermal Control Technology, Beijing Institute of Spacecraft System Engineering, China Academy of Space Technology, Beijing 100094, China
    These authors contributed equally to this work.)

  • Yanpei Huang

    (Beijing Key Laboratory of Space Thermal Control Technology, Beijing Institute of Spacecraft System Engineering, China Academy of Space Technology, Beijing 100094, China
    Laboratory of Fundamental Science on Ergonomics and Environmental Control, School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China
    These authors contributed equally to this work.)

  • Zitian Niu

    (Beijing Key Laboratory of Space Thermal Control Technology, Beijing Institute of Spacecraft System Engineering, China Academy of Space Technology, Beijing 100094, China)

  • Yuandong Guo

    (Laboratory of Fundamental Science on Ergonomics and Environmental Control, School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China)

  • Qi Wu

    (Beijing Key Laboratory of Space Thermal Control Technology, Beijing Institute of Spacecraft System Engineering, China Academy of Space Technology, Beijing 100094, China)

  • Jianyin Miao

    (Beijing Key Laboratory of Space Thermal Control Technology, Beijing Institute of Spacecraft System Engineering, China Academy of Space Technology, Beijing 100094, China)

Abstract

Concentrating photovoltaic power generation technology is a highly efficient way of utilizing solar energy resources with the efficiency limited by cell cooling conditions. For the heat dissipation problem from multi-point solar cell cooling, a microchannel heat sink is used to resolve the issue. Ammonia is chosen as the working fluid and two diamond microchannel heat sinks in series for the 16 simulated solar cells cooling with typical size. The heat sink consists of 31 triangular microchannels, each with a hydraulic diameter of 237 μm and a flow path length of 40 mm. It is experimentally verified that the diamond microchannel heat sink has excellent multi-point heat source heat dissipation capability. The surface temperature of the heat source can be controlled below 65.9 °C under the heat flux of 351.5 W/cm 2 , and the maximum temperature difference between the multi-point heat sources is only 1.4 °C. The effects of heat flux, mass flux and inlet state on the flow boiling heat transfer capacity within the series heat sinks were investigated and the ranges of the operating conditions are as follows: heat flux 90.8–351.5 W/cm 2 , mass flux 108–611 kg/(m 2 s), saturation temperature 15–23 °C and inlet temperature 15–21 °C. The results show that within the range of experimental conditions, the flow boiling heat transfer capacity of the series heat sink increases with the increase of heat flux and is less influenced by the mass flux, showing the typical two-phase heat transfer characteristics dominated by the nucleation boiling mechanism. Between the upstream and downstream heat sinks, the thermal resistance of the upstream heat sink is larger and the temperature uniformity of the downstream heat sink is poor because of the difference of the inlet state.

Suggested Citation

  • Qi Yang & Yanpei Huang & Zitian Niu & Yuandong Guo & Qi Wu & Jianyin Miao, 2022. "Experimental Investigation on the Heat Transfer Characteristics of Multi-Point Heating Microchannels for Simulating Solar Cell Cooling," Energies, MDPI, vol. 15(15), pages 1-14, July.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:15:p:5315-:d:868684
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    References listed on IDEAS

    as
    1. Daneshazarian, Reza & Cuce, Erdem & Cuce, Pinar Mert & Sher, Farooq, 2018. "Concentrating photovoltaic thermal (CPVT) collectors and systems: Theory, performance assessment and applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 81(P1), pages 473-492.
    2. Piero Bevilacqua & Stefania Perrella & Daniela Cirone & Roberto Bruno & Natale Arcuri, 2021. "Efficiency Improvement of Photovoltaic Modules via Back Surface Cooling," Energies, MDPI, vol. 14(4), pages 1-18, February.
    3. Sato, Daisuke & Yamada, Noboru, 2019. "Review of photovoltaic module cooling methods and performance evaluation of the radiative cooling method," Renewable and Sustainable Energy Reviews, Elsevier, vol. 104(C), pages 151-166.
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