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사무공간에서 하절기 블라인드 설치 위치에 따른 에너지성능 평가에 대한 연구
윤갑천(Yoon, Kap-Chun),김강수(Kim, Kang-Soo) 대한건축학회 2012 대한건축학회논문집 Vol.28 No.1
The objective of this study is to evaluate the influence of the blind position on the energy performance with a double-skin facade system. First, we measured indoor and intermediate space temperature from 4th of June to 10th of July. And EnergyPlus simulation was performed during the same period. After that, MBE & Cv(RMSE) were analyzed to validate the measurement and simulation results. As a results, the cooling load derived by EnergyPlus program with exterior blind is 54.9%(peak load 39.8%) smaller than that of no blind. And the cooling load derived by EnergyPlus with interior blind is 28.2%(peak load 18.1%) smaller than that of no blind. So, we can see that exterior blind has better thermal performance than interior blind.
건물의 일사에너지 예측을 위한 경사면 일사량 측정과 예측모델과의 비교분석 연구
윤갑천(Yoon, Kap-chun),전종욱(Jeon,Jong-Ug),김강수(Kim, Kang-Soo) 한국태양에너지학회 2012 한국태양에너지학회 논문집 Vol.32 No.6
In all building‘s energy simulation applications, solar radiation must be calculated on inclined surfaces. Various solar radiation models based on measured data of specific region were used in building simulation programs. Therefore, we should choose the appropriate solar radiation model for Seoul.The purpose of this study is to compare four solar radiation models on inclined surfaces that are widely used in building energy simulations. In this case, it can be said the appropriate model in Seoul is the Isotropic model.
일사의 발광효율을 이용한 수직면 주광조도 예측에 관한 연구
윤갑천(Yoon Kap-Chun),김강수(Kim Kang-Soo) 한국태양에너지학회 2014 한국태양에너지학회 논문집 Vol.34 No.1
Exterior vertical illuminance is an important factor for lighting control. But, there are not many researches about the exterior illuminance on a vertical surface. In this study, we predicted the exterior illuminance on a vertical surface using vertical luminous efficacy. First, we calculated the vertical luminous efficacy according to the sky clearness category. And we performed the statistical analysis of the measured and the calculated illuminance with luminous efficacy. The MBE and RMSE of the predicted exterior illuminance were-1.2% and 15.5%, respectively. Second, the annual illuminance on a vertical surface calculated with the luminous efficacy and the short-term measured solar irradiance was suggested in this study.
실내 주광조도 간이 예측식을 활용한 담천공 시의 자연 채광 성능 평가
윤갑천(Yoon Kap-Chun),윤수인(Yun Su-In),김성식(Kim Seong-Sik),김강수(Kim Kang-Soo) 한국태양에너지학회 2014 한국태양에너지학회 논문집 Vol.34 No.5
Daylight is very useful to control the indoor environment, and can save energy in buildings. So it is necessary to evaluate the daylighting performance of buildings. We proposed a simplified equation that can be used in the early stages of design. And we verified the equation by using the measured illuminance data from the 1/5 scale model. We compared the calculated indoor illuminances and measured illuminance including Daylight Factors of scale model in order to verify the applicability of the simplified equation, and proved the analyzed values are acceptable. When we have a target value of the Daylight Factor, we just have to determine the window area, transmittance of the glazing system, and indoor surface reflectance, then can achieve it with this simplified equation.
보일러 대수제어에 따른 사무소건물 난방에너지 절감에 대한 연구
윤갑천(Yoon Kap-Chun),박두용(Park Doo-Yong),윤경(Yun Gyeong),김영민(Kim Young-Min),김영섭(Kim Young-Sup),김강수(Kim Kang-Soo) 한국건축친환경설비학회 2013 한국건축친환경설비학회 논문집 Vol.7 No.2
We proposed the operating number control of hot water boiler to save the heating energy consumption in office building. First, we split the existing boiler into two same capacity(500KW). As a result, the heating energy saving rate was 21%. And, we split the existing boiler into two capacity of 700KW and 300KW according to the heating load. In this case, the heating energy saving rate was 33%. These results presents the higher saving rates of heating energy consumption about 11% than that of the case of improving the existing boiler efficiency from 80% to 90%. Therefore, it can be said that the operating number control is more efficient way to reduce heating energy consumption than the improvement of existing boiler efficiency.
EnergyPlus와 eQUEST를 이용한 공동주택의 난방에너지소비량 비교분석에 관한 연구
박두용(Park, Doo-Yong),윤갑천(Yoon, Kap-Chun),김강수(Kim, Kang-Soo) 한국태양에너지학회 2013 한국태양에너지학회 논문집 Vol.33 No.1
Energy consumption analysis of multi-family apartment is an important area of research for the design of energy-saving housing. In this study, we selected a universal type of Flat-type apartments and analyzed the heating energy consumption of variables such as U-value, G-value, infiltration rate, heating setpoint and boiler efficiency with EnergyPlus and eQUEST. With these results, we identify the characteristics of EnergyPlus and eQUEST and provided base data for the design of energy-saving housing. The results indicate that infiltration rate is the most important factors to consider. And eQUEST heating energy consumption is approximately 10% higher compared to the EnergyPlus under same condition.
외피 투과체 변화에 따른 G-value 평가에 관한 연구
김동균(Kim Dong-Kyun),윤갑천(Yoon Kap-Chun),최경석(Choi Gyeong-Seok),김강수(Kim Kang-Soo) 한국건축친환경설비학회 2010 한국건축친환경설비학회 학술발표대회 논문집 Vol.2010 No.10
The purpose of this paper is to calculate monthly G-value when changing the glazing and shading device. For this study, e-Quest which is developed by Department of Energy in U.S.A performed the simulation for vertical solar radiation, transmitted solar radiation through windows and the secondary heat flow. Among the design factors of a building skin, high performance glazing, overhangs, venetian blind, and roller blind were used in the simulation. In addition, venetian blind, and roller blind were located at the inner side of the window. In light of the result, monthly G-value was the highest in July in summer for the reason of the rainy season. However, monthly G-value has increased in winter because of low incident angle.
이중외피에서 창문 개폐 및 블라인드 설치에 따른 하절기 실내 열환경 특성 변화 실험 연구
김동균(Kim Dong-Kyun),윤갑천(Yoon Kap-chun),강재식(Kang Jae-Sik),김강수(Kim Kang-Soo) 한국태양에너지학회 2011 한국태양에너지학회 논문집 Vol.31 No.1
This paper is focused on the effect of indoor temperature rise according to the use of windows and blinds in double skin facade in summer. For the experiment, we set up the mock-up of double skin facede and measuring temperature and solar radiation. Total 7 cases were used for measuring solar transmittance and indoor temperature rise. When the venetian blind was not installed, solar transmittance was 44.5%, and solar transmittance for the case that installed the venetian blind (angle 0) was 22.5%. Cases that opened inner and outdoor windows for ventilation showed lower indoor temperature rise than cases with closed windows. In addition, Case5 (opened inner and outdoor windows with the venetian blind (angle 0) to reduce solar transmittance) indicated lower in door temperature rise than Case3 (opened inner and outdoor windows). Consequently, Case5 which uses inner and outdoor window for ventilation and venetian blind to reduce solar transmittance is the most effective way to reduce indoor temperature rise among all cases tested in this research.