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Solar optical properties of windows
Author(s) -
Rubin Michael
Publication year - 1982
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.4440060204
Subject(s) - transmittance , solar gain , optics , absorptance , materials science , solar energy , coating , optoelectronics , window (computing) , reflection (computer programming) , optical coating , solar mirror , thermal , layer (electronics) , reflectivity , photovoltaic thermal hybrid solar collector , computer science , composite material , physics , engineering , electrical engineering , programming language , meteorology , operating system
To properly calculate dynamic solar gain in buildings, one must know the optical properties of the window in detail. In this paper, we develop a complete set of calculation procedures for determining the solar transmittance, reflectance, and absorptance of a window composed of an arbitrary number of partially transparent layers. Any layer may have a thin‐film multilayer coating, such as an anti‐reflection coating for increasing solar transmittance, a solar control film for reducing solar heat gain, or a transparent heat‐reflecting mirror for improving thermal resistance. The results of sample calculations are given over the range of incidence angles for conventional and advanced energy conserving window designs.