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Experimental Study on the Performance of a Space Radiation Cooling System under Different Environmental Factors

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  • Zhaoyi Zhuang

    (College of Thermal Energy Engineering, Shandong Jianzhu University, Jinan 250101, China)

  • Yanbiao Xu

    (College of Thermal Energy Engineering, Shandong Jianzhu University, Jinan 250101, China)

  • Qian Wu

    (Shandong Superego Ground Source Heat Pump Technology Co., Ltd., Binzhou 256600, China)

  • Bing Liu

    (Shandong Superego Ground Source Heat Pump Technology Co., Ltd., Binzhou 256600, China)

  • Bowen Li

    (College of Thermal Energy Engineering, Shandong Jianzhu University, Jinan 250101, China)

  • Jin Zhao

    (College of Thermal Energy Engineering, Shandong Jianzhu University, Jinan 250101, China)

  • Xuebin Yang

    (College of Thermal Energy Engineering, Shandong Jianzhu University, Jinan 250101, China)

Abstract

As a new passive cooling technology, space radiation cooling has great potential for development because the cooling itself has no energy consumption, and the radiation heat exchanger does not affect the appearance, with low noise and low cost. Several rectangular stainless steel plates coated with RLHY-2 material are used as the transmitter for the field test. The experimental results show that, in the case of no windscreen, the increase of outdoor humidity will reduce the cooling effect, and the greater the humidity, the more pronounced the reduction effect. Significantly when the humidity increases from 78% to 90%, the cooling power of the cooler reduces from 102 to 67 W/m 2 . The thickness of the cloud layer also affects the cooling effect of the space radiative cooler. Compared with the clear weather, the cooling power of the cooler is reduced by 11.65 W/m 2 on average under foggy weather conditions. Compared with the force-1 wind and the force-3 wind, the cooling effect of the cooler is the worst under the condition of the force-2 wind, and the average cooling power is only 49.76 W/m 2 . In addition, laying polyethylene (PE) film as a windscreen is beneficial to improving the radiative cooling effect, and the difference in surface temperature between the two is up to 3 °C. This research provides a theoretical basis and practical reference for applying radiative cooling technology in different regions and seasons and adjusting and improving its effects.

Suggested Citation

  • Zhaoyi Zhuang & Yanbiao Xu & Qian Wu & Bing Liu & Bowen Li & Jin Zhao & Xuebin Yang, 2022. "Experimental Study on the Performance of a Space Radiation Cooling System under Different Environmental Factors," Energies, MDPI, vol. 15(19), pages 1-18, October.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:19:p:7404-:d:937174
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    References listed on IDEAS

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    1. Liu, Jie & Xu, Chengfeng & Ao, Xianze & Lu, Kegui & Zhao, Bin & Pei, Gang, 2022. "A dual-layer polymer-based film for all-day sub-ambient radiative sky cooling," Energy, Elsevier, vol. 254(PA).
    2. Aaswath P. Raman & Marc Abou Anoma & Linxiao Zhu & Eden Rephaeli & Shanhui Fan, 2014. "Passive radiative cooling below ambient air temperature under direct sunlight," Nature, Nature, vol. 515(7528), pages 540-544, November.
    3. Tso, C.Y. & Chan, K.C. & Chao, Christopher Y.H., 2017. "A field investigation of passive radiative cooling under Hong Kong’s climate," Renewable Energy, Elsevier, vol. 106(C), pages 52-61.
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    Cited by:

    1. Alexandr Tsoy & Alexandr Granovskiy & Dmitriy Koretskiy & Diana Tsoy-Davis & Nikita Veselskiy & Mikhail Alechshenko & Alexandr Minayev & Inara Kim & Rita Jamasheva, 2023. "Experimental Study of the Heat Flow and Energy Consumption during Liquid Cooling Due to Radiative Heat Transfer in Winter," Energies, MDPI, vol. 16(13), pages 1-18, June.

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