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Global luminous efficacies on vertical surfaces for all sky types

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  • Soler, A.
  • Robledo, L.

Abstract

Luminous efficacies are determined at Madrid for North, South, East, West facing surfaces in two ways: by taking into account all the global illuminance and irradiance values available, and by considering data for each of three sky categories as defined from values of the sky clearness index ε′ and the sky brighteness index Δ. Both methods are compared, and for ε′<1.23 (overcast skies) the second method is found to be more accuarate than the first.

Suggested Citation

  • Soler, A. & Robledo, L., 2000. "Global luminous efficacies on vertical surfaces for all sky types," Renewable Energy, Elsevier, vol. 19(1), pages 61-64.
    • Handle: RePEc:eee:renene:v:19:y:2000:i:1:p:61-64
    DOI: 10.1016/S0960-1481(99)00016-6
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    References listed on IDEAS

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    1. Robledo, Luis & Soler, Alfonso, 1997. "Modelling daylight on inclined surfaces for applications to daylight conscious architecture," Renewable Energy, Elsevier, vol. 11(2), pages 149-152.
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    1. Soler, A & Gopinathan, K.K & Claros, S.T, 2001. "A study on zenith luminance on Madrid overcast skies," Renewable Energy, Elsevier, vol. 23(1), pages 49-55.
    2. Robledo, Luis & Soler, Alfonso, 2000. "Luminous efficacy of direct solar radiation for clear skies," Energy, Elsevier, vol. 25(8), pages 689-701.
    3. Janjai, S & Jantarach, T & Laksanaboonsong, J, 2003. "A model for calculating global illuminance from satellite data," Renewable Energy, Elsevier, vol. 28(15), pages 2355-2365.
    4. De Rosa, A. & Ferraro, V. & Kaliakatsos, D. & Marinelli, V., 2008. "Calculating diffuse illuminance on vertical surfaces in different sky conditions," Energy, Elsevier, vol. 33(11), pages 1703-1710.
    5. Robledo, L. & Soler, A., 2002. "A simple clear skies model for the luminous efficacy of diffuse solar radiation on inclined surfaces," Renewable Energy, Elsevier, vol. 26(2), pages 169-176.
    6. Soler, A & Gopinathan, K.K, 2001. "Analysis of zenith luminance data for all sky conditions," Renewable Energy, Elsevier, vol. 24(2), pages 185-196.

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