Corrections for minimizing solar profile prediction errors and methods for preventing direct glare on the workplane in blind control

Abstract

As a means of improvement of environmental comfort in buildings with blind control, the objective of this study is to minimize solar profile prediction error for the purpose of preventing direct glare caused by the sunlight inlet in blind control. During the process of solar profile prediction, the main variables that cause prediction error of the solar profile were defined and problems from the prediction error were analysed. Surface orientation and time are significant factors that may cause error and glare during blind control. This research proposes and evaluates the correction methods and control strategy to minimize prediction error. In this research, the proposed correction methods and control strategy, which considers the surface orientation based on True North and potential time errors, could solve problems of direct glare caused by daylight inlet on the workplane, according to prediction errors of the solar profile. These methods could also be used to maximize daylight and solar heat gain, because the blocked area on windows could be minimized.