A Skylight Energy Balance Analysis Procedure

Abstract

This paper provides a systematic method for calculating the total, net differential energy balance observed when sections of the roof of a building are replaced with skylights. Numerous mathematical models have been developed to approximate the heat transfers and illumination energy gains associated with the installation of skylights. The procedure described herein is especially well suited for implementation on a relatively inexpensive class of microcomputers. Among the topics discussed are the effect of solar gains, dome and curb conduction heat transfers, equivalent roof area heat transfers, infiltration heat transfers, artificial lighting energy requirements, and illumination savings from skylights. The paper also provides much of the supplementary information (data) needed to complete these energy calculations. This information appears in the form of appendices, tables, and graphs, found at the end of the paper.