Open AccessA sensor-less LED dimming system based on daylight harvesting with BIPV systems
Author(s) -
SeungHwan Yoo,
Jonghun Kim,
Cheol-Yong Jang,
Hakgeun Jeong
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.00a132
Subject(s) - daylight , photovoltaic system , building integrated photovoltaics , daylighting , electric light , led lamp , energy consumption , electric energy consumption , environmental science , automotive engineering , computer science , sunlight , smart lighting , light emitting diode , dimmer , power (physics) , electrical engineering , electric energy , optics , engineering , voltage , architectural engineering , physics , quantum mechanics
Artificial lighting in office buildings typically requires 30% of the total energy consumption of the building, providing a substantial opportunity for energy savings. To reduce the energy consumed by indoor lighting, we propose a sensor-less light-emitting diode (LED) dimming system using daylight harvesting. In this study, we used light simulation software to quantify and visualize daylight, and analyzed the correlation between photovoltaic (PV) power generation and indoor illumination in an office with an integrated PV system. In addition, we calculated the distribution of daylight illumination into the office and dimming ratios for the individual control of LED lights. Also, we were able directly to use the electric power generated by PV system. As a result, power consumption for electric lighting was reduced by 40 - 70% depending on the season and the weather conditions. Thus, the dimming system proposed in this study can be used to control electric lighting to reduce energy use cost-effectively and simply.