CORRELATIONS FOR SOLAR IRRADIANCE AND DAYLIGHT ILLUMINANCE FOR BUILDING ENERGY ANALYSIS.

Gary L. Gillette, Stephen James Treado

Research output: Contribution to journalConference articlepeer-review

15 Scopus citations

Abstract

The concept of luminous efficacy, the ratio of daylight illuminance to solar irradiance, is investigated for use in building energy analyses. Horizontal and vertical luminous efficacies are evaluated as functions of solar altitude, cloud condition, atmospheric extinction coefficient, turbidity, and season. Based on sky measurements made at the National Bureau of Standards, values of luminous efficacy for total, diffuse, and direct beam radiation are presented.

Original languageEnglish (US)
Pages (from-to)180-192
Number of pages13
JournalASHRAE Transactions
Volume91
Issue numberpt 1A
StatePublished - Dec 1 1985

All Science Journal Classification (ASJC) codes

  • Building and Construction
  • Mechanical Engineering

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