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에너지 자립형 증발냉각기반 전외기 공조시스템 적용 UFAD 시스템 구현을 위한 최적 PV array 면적 예측
석윤진(Seok,yoon-Jin),김민휘(Kim Min-Hwi),권오현(Kwon Oh-Hyun),정재원(Jeong Jae-Weon) 한국건축친환경설비학회 2011 한국건축친환경설비학회 학술발표대회 논문집 Vol.2011 No.10
The purpose of this study is to calculate optimum PV array area according to conditioning room size in case the energy conservational UFAD system integrated with IDECOAS, founded in a precedent study, is operated and PV system is using for the UFAD system integrated with IDECOAS energy consumptions. For calculation of energy consumptions of the system, the system is simulated using commercial equation solver program EES, and economical anaysis for the calculating optimum PV array area is conducted using RETScreen program. The results show that the 60~100% installation area of PV system compared with maximum area of worst day have economic validity and the 70~100% installation area of PV system compared with maximum area of worst day is suited for self-sufficient energy system.
태양광을 이용한 증발냉각기반 전외기 공조시스템 적용 UFAD 시스템 설계를 위한 Design Tool 개발
석윤진(Seok, Youn-Jin),김민휘(Kim, Min-Hwi),진정탁(Jin, Jeong-Tak),조홍재(Cho, Hong-Jae),정재원(Jeong, Jae-Weon) 한국건축친환경설비학회 2011 한국건축친환경설비학회 논문집 Vol.5 No.4
The purpose of this study is to develop a design tool which can estimate the Indirect and Direct Evaporative Cooling assisted 100% Outdoor Air System (IDECOAS) integrated with Underfloor Air Distribution system (UFAD system) capacity approximately, the required PV array area and monthly power and evaluate the design tool compared with a installation case. For this, the simulation is conducted in the same condition of input parameters with case study on real building in Mokpo. The results show difference because solar radiation data and monthly PV module efficiency in real case have differences compared with simulation. But since monthly PV efficiencies in simulation have been corrected in the same condition of real case, the results show very similarity.
태양광을 적용한 증발냉각기반 전외기 공조시스템 기반 UFAD 시스템 설계를 위한 Design tool 개발 연구
석윤진(Seok yoon-Jin),김민휘(Kim Min-Hwi),권오현(Kwon Oh-Hyun),정재원(Jeong Jae-Weo) 대한건축학회 2011 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.31 No.2(계획계)
The purpose of this study is to develop a design tool which can estimate the IDECOAS integrated with UFAD capacity approximately, the required PV array area and monthly power and evaluate the design tool compared with a installation case. For this, the simulation is conducted in the same condition of input parameters with case study on real building in Mokpo. The results show difference because solar radiation data and monthly PV module efficiency in real case have differences compared with simulation. But since monthly PV efficiencies in simulation have been corrected in the same condition of real case, the results show very similar.
증발냉각시스템을 적용한 바닥급기시스템의 에너지 성능 평가
석윤진(Seok yoon-Jin),김민휘(Kim Min-Hwi),권오현(Kwon Oh-Hyun),진정탁(Jin Jeong-Tak),정재원(Jeong Jae-Weon) 한국건축친환경설비학회 2011 한국건축친환경설비학회 학술발표대회 논문집 Vol.2011 No.3
The purpose of this paper is to evaluate the energy performance of a Underfloor Air Distribution(UFAD) System integrated with an Indirect Evaporative Cooler(IEC) in hot and humid climate. It is assumed that office space is served during summer days by different HVAC system; a conventional overhead system, a UFAD system with reheat coil, a UFAD system with return air bypass, a convenational overhead system with IEC and a UFAD system integrated with IEC. Each system is simlated using commercial equation solver program EES. And the operating enegy consumption of each system is compared. The results show that the UFAD system integrated with IEC is be able to reduce the total operating energy consumption over 26.97% compared with a UFAD system and 27% compared with a conventional overhead system through the energy simulation.
서울, 경기 지역 월평균 수평면 일사량 산출을 통한 청명도 예측 모델 타당성 검증
김진효(Kim Jin-Hyo),김민휘(Kim Min-Hwi),권오현(Kwon Oh-Hyun),석윤진(Seok Yoon-Jin),정재원(Jeong Jae-Weon) 한국태양에너지학회 2010 한국태양에너지학회 학술대회논문집 Vol.2010 No.4
The main thrust of this paper is to investigate a practical way of generating the monthly averaged daily horizontal solar radiation in Korea. For estimating the horizontal solar radiation, the clearness index(K<SUB>T</SUB>) and the clearness number(C<SUB>N</SUB>) which are required for the use of Liu and Jordan's model and ASHRAE Clear Sky model were derived based on the measured weather data. Third-order polynomials returning K<SUB>T</SUB> and C<SUB>N</SUB>for a given location were derived as a function of cloud amount, month, date, latitude and longitude. The predicted monthly averaged daily horizontal solar radiation values were compared with those acquired from the established design weather data. Consequently, the predicted monthly averaged daily horizontal solar radiation values is similar to the measured weather data.
간접식 및 직접식 증발냉각기를 이용한 100% 외기 공조시스템의 에너지 절감효과 분석
김민휘(Kim Min-Hwi),김진효(Kim Jin-Hyo),권오현(Kwon Oh-Hyun),석윤진(Seok Yoon-Jin),정재원(Jeong Jae-Weon) 대한건축학회 2010 대한건축학회논문집 Vol.26 No.4
The main thrust of this paper is to investigate the energy saving potentials of an 100% outdoor air (OA) system integrated with indirect (IEC) and direct evaporative coolers (DEC). For estimating the energy performance of the proposed system, it was assumed that four typical 60m2 classrooms were served by two different HVAC systems; the 100% outdoor air system and the conventional variable air volume (VAV) system. Transient behavior and control characteristics of each system were modeled numerically using a commercial equation solver program. Annual air conditioning and fan energy consumptions were estimated and then the energy saving potentials of the proposed 100% OA system were predicted. It was found that 100% OA system integrated with IEC and DEC would be able to reduce the annual cooling coil load about 16-25% and the annual heating coil load around 80-87% with respect to the conventional VAV system. Consequently, the overall operating energy saving potentials of the proposed system is 21-51%, while it depends highly on the effectiveness of the IEC unit.