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Cooling benefit of implementing radiative cooling on a city-scale

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  • Li, Haoran
  • Zhang, Kai
  • Shi, Zijie
  • Jiang, Kaiyu
  • Wu, Bingyang
  • Ye, Peiliang

Abstract

The map of radiative cooling potential shows that the radiative cooling power can reach up to 100 W/m2 for its application in different climatic zones. However, the effect of building deployment on the city-scale application of radiative cooling is generally ignored in majority of existing studies, which overestimates the cooling benefit. This paper investigates the cooling benefit of implementing radiative cooling on a city-scale by considering building deployment. To determine the effect of building deployment on the radiative cooling potential, the city of Xi'an in China is modeled using COMSOL and verified with real weather data. Then, the thermal response of buildings with radiative cooling envelopes is discussed in detail. Finally, carbon emission reduction is derived at the city-scale by applying radiative cooling considering building deployment. The results show that the estimated radiative cooling power is approximately decreased by 14.7% for the ideal broadband surface and 47.1% for the ideal selective surface on the selected day by considering building deployment on a city-scale. Furthermore, carbon emission reductions of 0.52 gCO2/(m2⋅h) and 0.16 gCO2/(m2⋅h) can be achieved from the roof and walls on the selected day by applying radiative cooling material on both the roof and walls. This study can provide guiding significance for the large-scale application of radiative cooling in cities.

Suggested Citation

  • Li, Haoran & Zhang, Kai & Shi, Zijie & Jiang, Kaiyu & Wu, Bingyang & Ye, Peiliang, 2023. "Cooling benefit of implementing radiative cooling on a city-scale," Renewable Energy, Elsevier, vol. 212(C), pages 372-381.
    • Handle: RePEc:eee:renene:v:212:y:2023:i:c:p:372-381
    DOI: 10.1016/j.renene.2023.05.079
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    References listed on IDEAS

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