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Thermal management of high concentrator photovoltaic system using a novel double-layer tree-shaped fractal microchannel heat sink

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  • Peng, Hao
  • Du, Yanlian
  • Hu, Fenfen
  • Tian, Zhen
  • Shen, Yijun

Abstract

With the aim to overcome the excessive temperature and uneven temperature distribution on cells in high concentrator photovoltaic (HCPV) system, a novel cooling method based on double-layer tree-shaped fractal microchannel heat sink (FMCHS) is proposed. A three-dimensional heat transfer and flow model is established. The effects of four different flow modes and inlet velocity on thermal-hydraulic performance, cell surface temperature and electrical efficiency are investigated. The results show that compared with single-layer FMCHS, under unilateral, bilateral, inner and cross flow modes, the average temperature of cell surface (Tcell) are decreased by 2.14%, 1.65%, 1.61% and 1.41%, respectively; while the temperature difference of cell surface (ΔT) are decreased by 84.9%, 82.6%, 70.9% and 72.8%, respectively. For double-layer FMCHS, ΔT under four flow modes are all less than 3 K; the inner flow has the best cooling effect, which can minimize Tcell and ΔT to 339.2 and 2.1 K respectively, and maximize electrical efficiency (ηcell) to 41.68%. With increasing inlet velocity from 0.5 to 2 m s−1, for double-layer FMCHS under inner flow, Tcell is decreased by 11.7 K. The designed double-layer FMCHS has higher cooling performance than single-layer FMCHS, and can ensure the efficient and safe operation of HCPV system.

Suggested Citation

  • Peng, Hao & Du, Yanlian & Hu, Fenfen & Tian, Zhen & Shen, Yijun, 2023. "Thermal management of high concentrator photovoltaic system using a novel double-layer tree-shaped fractal microchannel heat sink," Renewable Energy, Elsevier, vol. 204(C), pages 77-93.
    • Handle: RePEc:eee:renene:v:204:y:2023:i:c:p:77-93
    DOI: 10.1016/j.renene.2023.01.001
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    1. Marzouk, S.A. & Abou Al-Sood, M.M. & M.S. El-Said, Emad & Younes, M.M. & K. El-Fakharany, Magda, 2023. "Evaluating the effects of bifurcation angle on the performance of a novel heat exchanger based on contractual theory," Renewable Energy, Elsevier, vol. 219(P1).

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