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KS C 9306 기준 BIN 데이터 기반의 TAC를 반영한 지열 히트펌프 시스템 용량 선정에 관한 연구
강은철(Eun Chul Kang),이광섭(Kwang Seob Lee),이의준(Euy Joon Lee) 대한설비공학회 2017 대한설비공학회 학술발표대회논문집 Vol.2017 No.6
국내에서는 KS C 9306에서 BIN 데이터 선정 기준을 제시하고 있으며, BIN 데이터에서 제공하는 최고 및 최저 온도를 이용하면 건물에서의 냉난방 부하를 쉽게 산정할 수 있다. 냉난방 부하는 건물의 설정온도와 외기온도와의 관계식에 의해 구해지며, 설계된 값에 따라 건물에 적용되는 냉난방 설비의 용량이 선정된다. 본 연구에서는 KS C 9306에서 제시하는 방법을 이용하여 기상청에서 제공하는 최근 10년간(2005~2014) 서울 지역의 외기온도를 분석하였고, 이를 기반으로 서울 지역의 BIN 데이터를 만들었다. 또한 이를 이용하여 최고/최저온도 대비 건물 냉난방 설계온도 기준 TAC를 1.0%, 2.5%, 5.0%를 반영한 건물에서 의 냉난방 부하를 도출하였다. 그 결과 건물의 부하 설계시 TAC 반영에 따라 설비용량이 크게 바뀌는 것을 알 수 있었고, 지열 히트펌프 시스템을 적용할 경우 설비용량 및 비용 감소 효과가 기대됨을 알 수 있었다.
강은철(Kang Eun-Chul),최용전(Choi Yong-Jun),이의준(Lee Euy-Joon) 한국태양에너지학회 2010 한국태양에너지학회 학술대회논문집 Vol.2010 No.11
This study aims to evaluate of POF daylighting system performance. In this study, POF daylighting system has developed and applied to KIER test buildings. POF daylighting system consists of three parts: light collector, light transmitter and light diffuser. The light collector includes a circular Fresnel lens which gathering and focusing solar direct illuminance by sun tracking. The light transmitter contains the POF(Plastic optical fiber) cable which has light transmission loss of 4.5% per meter. The light diffuser has about 80% diffuser efficiency. At the results of POF system performance evaluation, theoretical POF system efficiency was 41.9% and actual POF system efficiency at the KIER test building was 38.2%. Moreover, system efficiency distribution almost uniformed at the actual test, except 16:00.
강은철(Kang Eun-Chul),아메드 나비드(Ahmed T Naveed),김용환(Kim Yong-Hwan),조일식(Cho Yil-Sik),이의준(Lee Euy-Joon) 한국태양에너지학회 2006 한국태양에너지학회 학술대회논문집 Vol.- No.-
Relatively higher electricity generation costs of PV due to the use of expensive PV raw materials is one of the barrier to its wide spread utilization as a clean and environmental friendly electricity source. One option to overcome this cost barrier is the use of concentrating photovoltaic(CPV) system. A CPV system with a linear Fresnel film collector has been proposed to make a focal line over PV module which can be rotated manually along two axes to track the sun and the measurement system. The experiments to analyze outdoor current and voltage on the CPV module were made on January 23, 2006 in Daejeon. As results, the electrical power output of the CPV module was 4 times higher than the PV module during the measurement duration. The power at the maximum point at the PV module was 15.3W at the 25℃. The fill factor and efficiency were 0.7 and 19.46% respectively. While the measurement temperature was 55℃ under concentration of 3.2 sun. The fill factor of the CPV module due to concentration and higher operating temperature was deteriorated as evident from the shape of the I-V curve. The efficiency and fill factor were 12.8% and 0.5 respectively. The power, current and voltage at the maximum power point concentration were 32.2W, 3.8A and 8.6V.
원형 프레넬 집광형 POF 주광 조명시스템 성능 평가 연구
강은철(kang Eun-Chul),최용전(Choi Yong-Jun),윤광식(Yoon Kwang-Sik),이의준(Lee Euy-Joon) 한국태양에너지학회 2011 한국태양에너지학회 논문집 Vol.31 No.1
CF(Circular Fresnel) POF(Plastic Optical Fiber) daylighting system is a beam daylighting system utilizing solar direct beam radiation. In this study, a CF POF daylighting system has been introduced, developed and applied to KIER test buildings. The CF POF daylighting system consists of three parts: light collector, light transmitter and light diffuser. The light collector includes a Circular Fresnel lens focusing solar direct illuminance by sun tracking. The light transmitter contains the POF cable which has light transmission loss of 4.5% per meter. The light diffuser has about 80% diffuser efficiency. This study aims to evaluate of POF daylighting system performance. At the results of a CF POF system performance evaluation, the theoretical CF POF system efficiency was 41.9% and the actual CF POF system efficiency at the KIER test building was 37.5%. The difference was due partly to the connecting efficiency.
태양열 신선 외기 난방 단위 모듈 에너지 성능 평가 monitoring에 관한 연구
강은철(Eun-Chul Kang),현명택(Myung-Taek Hyun),이의준(Euy-Joon Lee) 대한기계학회 2001 대한기계학회 춘추학술대회 Vol.2001 No.9
Solar Air Systems(SAS) have unique advantages for space heating and tempering ventilation air. Air, unlike water, needs no protection against freezing nor are leaks damaging to the building structure or its contents. In contrast to glazed collector, unglazed steel solar collector may have higher efficiencies over glazed flat collector due to the absence of the glass. Therefore, the monitoring of SAS is so important to evaluate a dual performance of SAS for right applications. This study is to provide a testing method with a movable test cell developed in KIER to evaluate the thermal performance of SAS based on international standard method ASHRAE 93-86, Method of Testing to Determine the Thermal Performance of Solar Collectors. The monitoring tool used advanced technique LabVIEW with portable notebook computer. A sample set of results has been obtained to access the performance of a reference and a target SAS sample.