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실내조명환경의 불쾌글레어 평가식에서 배경휘도의 지수 변화
신인중(In-Joong Shin),전봉구(Bong Ku Jeon),김원우(Wonwoo Kim) 한국생활환경학회 2009 한국생활환경학회지 Vol.16 No.1
The objective of this study is to propose the exponent of background luminance in the evaluation formula of discomfort glare from interior lighting. In the experiment, the degree of discomfort glare from luminous body was measured in three different conditions of background luminance. From the results of the experiments, it is known that the exponent of background luminance varies according to the luminance of the glare source. The size of the glare source has little effect on the variation of the exponent of background luminance. Based on the results of the experiment, a formula to obtain the exponent of background luminance was proposed considering the luminance of glare source. The validation of the proposed exponent of background luminance was conducted using the experimental conditions and the evaluation values. Through the validation, it is confirmed that the proposed exponent of background luminance can be adopted in the evaluation formula of discomfort glare when the size of glare source is 0.12 from to 0.68 sr.
김원우(Won-Woo Kim),신인중(In-Joong Shin) 한국생활환경학회 2005 한국생활환경학회지 Vol.12 No.4
GRW (Glare Rating for Windows) formula is forwarded for evaluating discomfort glare from a large glare source. The formula has 3 parameters, luminance of the source, size of the source and background luminance. The experiment was conducted on a model window to determine the exponents of the parameters. Discomfort glare from the model window is evaluated by 32 subjects. From the results, the exponent of source luminance is decided by 2.4, the exponent of source size is by 1 and the exponent of background luminance is by 0.1. The proposed formula is distinct from other formulas, in that it has simple form and background luminance affects little to the degree of discomfort glare. It is expected that discomfort glare from real windows can be appraised by the GRW formula.
실내조명의 불쾌글레어평가시의 대광원과 소광원의 분류 기준
김원우(Won-Woo Kim),신인중(In-Joong Shin) 한국생활환경학회 2005 한국생활환경학회지 Vol.12 No.2
The objective of this study work is to propose the standard size of glare source for classifying glare sources into two groups, large and small. The experiment was conducted on the self made glare meter. The luminances of glare sources causing discomfort were measured during the source sizes were changed. the results of the experiment show that the luminance of discomfort glare is down when the source size become larger, and the ratio of the luminance of discomfort glare and the source size has the highest value when the source size is 0.03sr. Base on the results, the size 0.03sr is proposed as the standard size for classifying glare sources into large sources and small sources.
채광창의 평균휘도가 불쾌글레어의 주관평가에 미치는 영향
김원우(Won-Woo Kim),신인중(In-Joong Shin) 한국생활환경학회 2004 한국생활환경학회지 Vol.11 No.2
Discomfort glare from a real daylight window is appraised to examine the effect of the average luminance of the window on discomfort glare. The window is divided into 6 parts. Discomfort glare from each part of the window and from the whole window is evaluated by 32 subjects. The degree of discomfort glare is an increasing linear function of luminance of each part, but the average luminance of the whole window is not related to the degree of discomfort glare. It is concluded that the average luminance of the entire window is unlikely to be a factor in the genesis of discomfort glare.
불균일한 휘도분포를 갖는 대광원으로부터의 불쾌글레어 평가
김원우(Won-Woo Kim),신인중(In-Joong Shin) 한국생활환경학회 2007 한국생활환경학회지 Vol.14 No.1
This work aims to propose a practical system of evaluating discomfort glare from daylight. The degree of discomfort glare was examined using the luminous body of nonuniform surface luminance. It is found that the degree of discomfort glare is decreased when the ratio of lower luminance to higher luminance is decreased. The degree of discomfort glare was estimated for each experimental condition, and compared to the observations. The estimation was made using two methods: one used the average luminance of the whole luminous body in the evaluation formula, and the other summed the glare sensation for each section. No significant differences among the observations and the two kinds of estimates were found. Consequently, the use of the average luminance was proposed for evaluation of discomfort glare from nonuniform large glare sources as a simple and practical method.
박정하(Park Jung-ha),김원우(Kim Won-woo),신인중(Shin In-joong),황정하(Hwang Jung-ha) 한국건축친환경설비학회 2009 한국건축친환경설비학회 논문집 Vol.3 No.4
The present study is primarily aimed at the method reducing light pollution. Light pollution is one of the negative side-effects of artificial lighting. The function of outdoor lighting is to enhance the visibility or the aesthetics in the nighttime environment. When the light did not come where it is needed, it is spilled, causing economic and environmental losses as well as disturbance and discomfort. This study is organised in two parts. the first part cover outdoor lighting recommendations of CIE, Korea and other countries. The second part deals with a field survey conducted at the business area in Seoul. Finally, some recommendations were proposed for reducing lighting pollution in Korea.
창으로부터의 불쾌글레어를 평가하기 위한 DGI평가법의 한계성 검토
김원우,신인중 대한건축학회 2004 대한건축학회논문집 Vol.20 No.11
The limitation of DGI is examined by the subjective experiment. Discomfort glare from a real daylight window is appraised. The window is divided into 6 parts. Discomfort glare from each part of the window and from the whole window is evaluated by thirty-two subjects. The degree of discomfort glare is an increasing linear function of luminance of each part, but the average luminance of the whole window is not related to the degree of discomfort glare. It is concluded that the average luminance of the entire window is unlikely to be a factor in the genesis of discomfort glare. In the DGI formula, the source luminance is calculated by the average luminance of the entire window, so that DGI method can not assess accurately discomfort glare from windows.