Advertisement

Building Simulation

, Volume 6, Issue 4, pp 379–383 | Cite as

A simple model for the derivation of illuminance values from global solar radiation data

  • Sokol Dervishi
  • Ardeshir Mahdavi
Research Article Building Thermal, Lighting, and Acoustics Modeling

Abstract

This paper presents a new simple luminous efficacy model for global horizontal irradiance. The objective is to derive values of outdoor global horizontal illuminance data from typical local weather station data including global horizontal irradiance and Humidity Ratio of outdoor air. The proposed luminous efficacy model incorporates, as the main influencing variable, the Clearness Factor, which is an original derivative from the Clearness Index. Two further variables are included in the model formulation. These are the Humidity Ratio and the solar altitude. Moreover, the model includes a location-dependent variable, which may be derived from the latitude information. The paper includes the result of the statistical analysis of the relationship between the model predictions and the measured data. The results of this analysis display a good agreement between predictions and measurements.

Keywords

daylight irradiance illuminance luminous efficacy simulation 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Aydinli S, Krochman J (1983). Data on daylight and solar radiation: Guide on daylight. Draft for CIE TC, 4.2.Google Scholar
  2. Chung TM (1992). A study of luminous efficacy of daylight in Hong Kong. Energy and Buildings, 19: 45–50.CrossRefGoogle Scholar
  3. Littlefair PJ (1988). Measurements of the luminous efficacy of daylight. Lighting Research and Technology, 20: 177–188.CrossRefGoogle Scholar
  4. Mahdavi A, Dervishi S (2011). A comparison of luminous efficacy models based on data from Vienna, Austria. Building Simulation, 4: 183–188.CrossRefGoogle Scholar
  5. Mahdavi A (2012). A relationship between luminous efficacy and a derivative function of sky clearness index. Internal Report, Department of Building Physics and Building Ecology, Vienna, Austria.Google Scholar
  6. MATLAB (2010). MATLAB Release 2010a. The MathWorks, Inc., Available: http://www.mathworks.com.Google Scholar
  7. Muneer T, Kinghorn D (1997). Luminous efficacy of solar irradiance: Improved models. Lighting Research and Technology, 29: 185–191.CrossRefGoogle Scholar
  8. Perez R, Ineichen P, Seals R, Michalsky J, Stewart R (1990). Modeling daylight availability and irradiance components from direct and global irradiance. Solar Energy, 44: 271–289.CrossRefGoogle Scholar
  9. Reindl DT, Beckam WA, Duffie JA (1990). Diffuse fraction correlations. Solar Energy, 45: 1–7.CrossRefGoogle Scholar
  10. Robledo L, Soler A (2001). On the luminous efficacy of diffuse solar radiation. Energy Convers Management, 42: 1181–1190.CrossRefGoogle Scholar
  11. Ruiz E, Soler A, Robledo L (2001). Assessments of Muneer’s Luminous Efficacy Models in Madrid and a proposal for new models based on his approach. Journal of Solar Energy Engineering, 123: 220–224.CrossRefGoogle Scholar

Copyright information

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.Department of Building Physics and Building EcologyVienna University of TechnologyViennaAustria
  2. 2.Department of ArchitectureEpoka UniversityTiranaAlbania

Personalised recommendations