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Experimental and theoretical investigation of a nocturnal radiator for space cooling

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  • Bagiorgas, H.S.
  • Mihalakakou, G.

Abstract

An aluminium nocturnal radiator, painted with an appropriate white paint, was established on the roof of the Department of Environmental and Natural Resources Management in Agrinio, Western Greece. The lightweight metallic radiator was used for cooling the ambient air below its initial temperature. The dynamic thermal performance of the system during summer months was calculated using an accurate mathematical model, based on the heat transferred from the air circulating inside the radiator to the ambient air. Furthermore, an extensive validation process was carried out. Thus, the experimental air temperature values at the radiator's outlet were compared with the theoretical ones and a very good agreement was achieved. The validation process was extended for two radiator's paints with different emissivities, in order to investigate the impact of different materials’ optical parameters on the system's efficiency.

Suggested Citation

  • Bagiorgas, H.S. & Mihalakakou, G., 2008. "Experimental and theoretical investigation of a nocturnal radiator for space cooling," Renewable Energy, Elsevier, vol. 33(6), pages 1220-1227.
    • Handle: RePEc:eee:renene:v:33:y:2008:i:6:p:1220-1227
    DOI: 10.1016/j.renene.2007.04.015
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    References listed on IDEAS

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    1. Assimakopoulos, M.N. & Mihalakakou, G. & Flocas, H.A., 2007. "Simulating the thermal behaviour of a building during summer period in the urban environment," Renewable Energy, Elsevier, vol. 32(11), pages 1805-1816.
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