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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.
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.
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.
우리나라 지역별 청명도 예측 모델을 이용한 월평균 수평면 일사량 산출
김진효(Kim Jin-Hyo),김민휘(Kim Min-Hwi),권오현(Kwon Oh-Hyun),석윤진(Seok Yoon-Jin),정재원(Jeong,Jae-Weon) 한국태양에너지학회 2010 한국태양에너지학회 논문집 Vol.30 No.2
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. The MBE(Mean Bias Error) and RMSE (Root Mean Squares for Error) between the predicted values and the measured data were near zero. It means that the suggested third-order polynomials for K<SUB>T</SUB> and C<SUB>N</SUB> have good applicability to Liu and Jordan's model and ASHRAE Clear Sky model.
현행 공동주택 필요 환기량 기준의 수요기반 환기량 조절법(DCV)에 대한 적용방안
김진효(Kim Jin-Hyo),김민휘(Kim Min-Hwi),권오현(Kwon Oh-Hyun),석윤진(Seok Yoon-Jin),정재원(Jeong Jae-Weon) 한국건축친환경설비학회 2009 한국건축친환경설비학회 논문집 Vol.3 No.4
The objective of this paper is to show the possibility of demand-controlled ventilation(DCV) using the Korean ventilation standard for apartment houses. A numerical model for predicting realtime occupant number and CO2 concentration under given conditions is developed using a commercial equation solver program. It was found that the current ventilation standard causes unstable ventilation system control in DCV application under CO2-DCV. It is because the ventilation rate(per person) used in Korea is the sum of the outdoor air required to remove or dilute air contaminants generated by both occupant and building itself. It was also found that current Korean ventilation standard modified as a form of ASHRAE standard enhances applicability of the current ventilation standard to the DCV approach.
에너지자립형 외기전담시스템 설계를 위한 필요 PV array 면적 예측 모델개발
김진효(Kim Jin-Hyo),권오현(Kwon Oh-Hyun),김민휘(Kim Min-Hwi),석윤진(Seok Yoon-Jin),정재원(Jeong Jae-Weon) 대한건축학회 2011 대한건축학회논문집 Vol.27 No.1
The main thrust of this paper is to develop a photovoltaic(PV) array area estimation model applicable to energy independent dedicated outdoor air system(DOAS) design. The proposed model was derived as a function of electrical load required to DOAS operation, tilt and azimuth angle of PV array and total incident solar radiation on a horizontal surface at a given location. The electrical loads of DOAS serving a high-rise apartment building with various unit sizes and numbers were estimated and a numrical model returning daily electrical energy consumption of a DOAS was derived. Total incident solar radiation on a horizontal surface at any given location were also estimated using an existing solar radiation prediction model. By comparing the results acquired from the proposed PV array area estimation model with an actual case found from open literature, applicability of the proposed model was verified. The predicated PV array area was very similar to that of the real case and would be used at the design phase of the energy independent DOAS.
외기전담시스템의 소요 전력 공급을 위한 PV array 면적 산정 프로그램 개발
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.11
The main thrust of this paper is to develop photovoltaic(PV) array area and electricity to delivered estimation program applicable to dedicated outdoor air system(DOAS) design. The proposed program was derived as a function of electrical load required to DOAS operation, tilt and azimuth angle of PV array and total incident solar radiation on a horizontal surface at a given location. The electrical loads of DOAS serving a high-rise apartment building were estimated and a numerical model returning daily electrical energy consumption of a DOAS was derived. Total incident solar radiation on a horizontal surface at any given location were also estimated using an existing solar radiation prediction model. The predicated PV array area and electricity to delivered were very similar to that of the real case and would be used at the design phase of the DOAS.
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.