Daylight calculations using constant luminance curves

BETMAN, ERNESTO

RENEWABLE ENERGY

PERGAMON-ELSEVIER SCIENCE LTD

Lugar: Amsterdam; Año: 2005 vol. 30 p. 241 - 257

0960-1481

Abstract This paper presents a simple method to manually estimate daylight availability and to make daylight calculations using constant luminance curves calculated with local illuminance and irradiance data and the all-weather model for sky luminance distribution developed in the Atmospheric Science Research Center of the University of New York(ARSC) by Richard Perez et al. Workwith constant luminance curves has the advantage that daylight calculations include the problem?s directionality and preserve the information of the luminous climate of the place. This permits accurate knowledge of the resource and a strong basis to establish conclusions concerning topics related to the energy efficiency and comfort in buildings. The characteristics of the proposed method are compared with the method that uses the coefficient: daylight factor. # 2004 Elsevier Ltd. All rights reserved.