Abstract
The energy consumption of artificial lighting and its impacts on health have stimulated research into natural lighting systems. However, natural lighting system designs are mainly custom, making them costly and difficult to replicate. This study took an office space as a testing field in order to develop a highly adaptable and adjustable modular natural light illumination system. We divided the system into multiple module designs, demonstrated the use of simple development and fabrication processes and integrated a freeform reflector into the system. In creating a freeform mirror, the optical simulation results of the tested field were regressed (through polynomial regression) to achieve a uniformly illuminated plane, and a high-efficiency light-emitting system was produced. Finally, an active heliostat was used to collect sunlight, combined with actual manufacturing verification and measurement results, in order to create an excellent indoor lighting system. As a result, we presented a low-cost and easy-to-design natural light illumination system for the assisted lighting of office areas.
Highlights
Introduction published maps and institutional affilGlobal development and population growth have led to increases in the use of energy in various fields [1]
The optical efficiency provided by the active heliostat system and the freeform reflector was used as the lightemitting device to satisfy the illuminance requirements, such as the uniformity and the illuminated range
This article provides a method for designing a modular natural-light lighting system under a limited budget, through the development of a new auxiliary lighting system that maintains light collection efficiency through the use of a dynamic sun-tracing method
Summary
Global development and population growth have led to increases in the use of energy in various fields [1]. Among them, lighting has witnessed significant energy consumption, reaching a nearly 20% in demand [2] a few years ago. Its impact on health and energy consumption has received little attention from the public. Modern lighting systems have a significant effect on health [2,3]. The generation of light accompanied by heating increases carbon dioxide emissions [4]. We should reduce energy consumption in lighting and provide healthy lighting. As most people in employment spend most of their daily time at work [7], public lighting system need to consider the preference of occupants as the primary iations
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