• 조명전기설비학회논문지
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• 제20권5호
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• pp.1-8
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• 2006

일반적으로 공동주택의 조도를 측정하여 공간의 평균조도를 분석할 때 KS 5점법과 IES 4점법의 조도측정 및 평균조도 산출방법을 적용한다. 이 측정 방법들은 각각 측정점이 달라 평균값에 차이가 발생하기 때문에 정확한 분석을 위하여 공간의 특성과 재실자들의 활동을 고려하여 선택적으로 적용되어야 한다. 그래서 본 연구에서는 측정된 조도값과 시뮬레이션값을 비교함으로써 평균조도 산출법을 객관적으로 평가하였다. KS 5점법은 조명기구의 직하부 조도를 최대한으로 고려한 측정법으로 국부조도 평가에 적합하며, IES 4점법은 공간의 최대 및 최소 조도값의 배제를 통해 평균적 개념에 더욱 접근한 방법이라 할 수 있다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1997년도 하계학술대회 논문집 E
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• pp.1764-1766
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• 1997

In this paper, the illuminance distribution of blackboards on classroom in elementary, junior, and senior high school was measured and analyzed. Generally, average illuminance and uniformity of illuminance was 519[lx] and 0.543 (elementary: 389[lx], 0.387; junior: 632[lx], 0.570; senior: 527[lx], 0.608) respectively. When all lighting fixtures in each classroom were turned on, average illuminance was higher about 65% than lights-out, and, in case that local lighting fixtures exist, was higher 27% than absence, but uniformity of illuminance turned bad on the contrary ($0.462{\rightarrow}0.676$). According to classification into direction of windows on classroom. facing north, both were bad. In case of classroom to slant to east or west, the difference of illuminance at the forenoon and afternoon was big, and uniformity of illuminance was also bad.

• 한국태양에너지학회 논문집
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• 제40권1호
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• pp.35-47
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• 2020

Due to the large window area, the lighting environment of the educational space between the window and deep part of the room is not uniformly illuminated, and the phenomenon of glare is severe. For this reason, the daylight performance of DSC-BIPV windows was analyzed in order to improve the natural lighting in the educational sector. The method derives the correlation with natural lighting by measurement and simulation. Dynamic simulation confirmed that the average illuminance of the target space was higher at later than the early afternoon. The performance of natural lighting at 40% and 30% transmission of DSC has the effect of significantly reducing the amount of excess light in existing windows. Nevertheless, the actual average illuminance in all seasons corresponds to the standard illuminance of the educational facility, 300 Lux. In addition, the uniformity is also seen through the skylight illuminance ratio.

• 한국산업융합학회 논문집
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• 제4권1호
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• pp.71-75
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• 2001

This study investigates the relationship between size of cosmetic shops, size of showcases, sorts and arrangement of light source, floor plan, and illuminance measured of interior space. From this result, the average space size of cosmetic shops were $623.2{\times}512.9{\times}258.1cm$(width, length, height), the average space size of showcases were $273.3{\times}53.8{\times}89.5cm$ (width, depth, height). The light source was most frequently used fluorescent lamp, and illuminance was the most highest nearby main showcase, and average illuminance were 722[Ix], uniformity were 0.3.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 1999년도 학술대회논문집-국제 전기방전 및 플라즈마 심포지엄 Proceedings of 1999 KIIEE Annual Conference-International Symposium of Electrical Discharge and Plasma
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• pp.175-180
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• 1999

This paper presents the effective design of the change of average illuminance and the arrangement of lamps by changing the form of working area and adjusting the distance between the wall and light. This study is intended to simplify the complex calculation of illuminance through the development of application program. It's plan to study application programs that can attain the value of advanced uniformly-distributed illuminance and average illuminance by changing the distance between the horizontal/vertical wall and lamp and between the horizontal/vertical lamp and lamp.

• 한국정보통신학회논문지
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• 제23권7호
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• pp.771-778
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• 2019

기존 단일 조도센서를 이용한 조도검출 방식은 좁은 FOV (Field of View) 특성 상 측정 위치에 따라 검출 조도의 균일도가 저하된다. 다수개의 조도센서를 통해 평균 조도값을 검출하는 방법은 복잡도 증가 및 계산과정에서 오류가 증가하는 문제점을 가지고 있다. 본 논문에서는 넓은 FOV를 가지는 하나의 이미지센서를 기반으로 한 조도검출 방법을 제안하였으며, 제안된 방법은 기존 조도센서가 가지는 시스템 복잡도, 오류 증가 등의 문제점이 해결 가능하다. 실내 환경에서의 성능평가 결과는 색차조도계 (CL-200A)를 이용한 기준값 대비 조도센서가 1개인 경우 평균 12%, 조도센서가 5개인 경우 평균 10.7%, 이미지센서의 경우 평균 6.2% 차이가 발생하는 것을 확인하였으며, 이를 통해 이미지센서를 기반으로 한 제안된 검출방법은 균일성이 향상된 공간조도를 간단하고 정확하게 검출할 수 있음을 확인하였다.

• 한국태양에너지학회 논문집
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• 제36권6호
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• pp.37-46
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• 2016

In this study, long-term global illuminance data for 19 selected cities are calculated from modeled solar radiation data, AEER's TMY2. Perez model in Daysim daylight simulation tool is used for the solar radiation to illuminance conversion. And then, daylight availability in an unit office space is evaluated for the 19 cities. For this evaluation, various daylight performance indices are reviewed since static daylight performance index such as daylight factor (DF) and annual average global illuminance value is not suitable for actual performance evaluation in terms of visual comfort and light energy saving of a space. This study evaluated daylighting performance of prototypical office space module by introducing DA (daylight autonomy) and UDI (Useful Daylight Illuminance) index for major cities of Korea. Result shows that there is upto 18% of illuminance level difference with annual average global illuminance data, but if we consider useful daylight in a space the illuminance level difference among the cities are only within 5%. This means that for sustainable building design especially in daylight design, amount of annual global illuminance is not important factor even in cloudy cities. Daylight design and daylight harvesting system would return similar energy saving impact regardless of building location.

• KIEAE Journal
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• 제14권1호
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• pp.15-22
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• 2014

Among the various building envelope elements, the glass area takes up the largest portion in the office building design. However, a large area of glass can cause problems such as excessive solar radiation, thermal comfort, and glare. Thus it is important to install the glass area to an appropriate level, and control solar radiation and inflow of daylight with blind devices. This study aims to improve the visual performance of the work plane through the automatic control of the venetian blinds. A total of eight kinds of control strategies were chosen; Case 1 does not control the blinds, Case 2 with the blind slats fixed at the angle of 0 degree, Case 3 to 6 using the existing blind control programs, and Case 7 and 8 with improved blind control. Case 3 with 90 degrees had the best energy performance, but the average indoor illuminance was 113lux, which is below the standards. Cases 4 and 5 showed higher levels of interior daylight illuminance with the average of 281lux and 403lux respectively. However, the fixed angles may have difficulties controlling excessive direct sunlight coming into the room and may cause glare. Cases 6 and 7 used sun tracking angle control and cut-off angle control, and the average interior illuminance was measured 250lux and 385lux respectively. Case 8 used the cut-off angle control in an hourly manner, satisfying the standard illuminance of 400lux with an average interior illuminance of 561lux. It was evaluated to be the best method to control direct solar radiation and to guarantee proper level of interior illumination.

• 한국조명전기설비학회지:조명전기설비
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• 제13권2호
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• pp.133-133
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• 1999

Average illuminance and luminance can be calculated by graphical methods to a certain extent but to calculate for a wide place a suitable software is needed. Softwares suitable for this purpose have been already developed in foreign nations, but the appropriate softwares for domestic use have not been developed. Therefore a program is developed which is executable in Hangul Windows. The softwares LAPRoad, is developed to calculate luminance and illuminance distribution of road surface, as well as average luminance and illuminance, overall uniformity, longitudinal uniformity, threshold increment veilling luminance and glare. And an apparatus that measures road surface reflection properties is developed. Because the road surface reflection properties is very important in luminance calculation, then concrete road surface reflection properties were measured.

• 한국조명전기설비학회지:조명전기설비
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• 제10권6호
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• pp.48-53
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• 1996

본 연구는 인천시에 소재한 초·중·고등학교의 야간 조명환경(교실, 과학실, 실험실)을 조사하기 위하여 개교된지 10년이내, 20년, 30년 경과 등으로 나누어 각 4개 학교 이상을 추출하여 조도를 측정, 분석하였다. 교실 평균조도는 235.5[lx](고등학교 ; 260[lx], 중학교; 208[lx], 초등학교 ; 203[lx]), 과학실과 실험실의 경우에는 233.7[lx](고등학교 ; 248.8[lx], 중학교; 216.4[lx], 초등학교 ; 207.8[lx])로서 양적인 면에서는 매우 향상되었으나, 균제도(평균값이 교실은 0.95, 과학실이나 실험실은 1.08)에 있어서는 권장값을 매우 초과하고 있으며, 조도구배에서도 최대조도와 최소조도의 비(교실;7.9, 과학실이나 실험실;6.8)가 크게 나타나며, 건축된지 오래된 학교일수록 크게 나타나 조도의 질적인 개선을 위한 많은 노력이 필요한 것으로 나타났다.