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초고층 공동주택 외기전담 시스템 기반 중앙 공급식 환기시스템의 적정 급기조건 설정
김민휘(Kim Min-Hwi),김진효(Kim Jin-Hyo),권오현(Kwon Oh-Hyun),정재원(Jeong Jae-Weon) 한국태양에너지학회 2009 한국태양에너지학회 학술대회논문집 Vol.2009 No.11월
The main thrust of this paper is to investigate acceptable supply air conditions of a dedicated outdoor air system (DOAS) for highrise apartment buildings. As for a typical 132-㎡ apartment unit, it was assumed that centralized DOAS-Ceiling Radiant Cooling Panel was installed. Transient behavior and control characteristics of each system were modeled numerically using a commercial equation solver program. The optimized dew point temperature of the DOAS was discussed on the basis of the ASHRAE standard 62.1-2007 and the current Korean ventilation standard for apartments. It was found that the optimized dew point temperature of the DOAS supply air accommodating total latent load of a space is 11-12℃ and the appropriate supply air temperature of the DOAS is 11-12℃ in cooling period and neutral temperature of 18-20℃ in intermediate period.
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.
복수의 열에너지 프로슈머가 존재하는 열 네트워크에서의 양방향 열공급 실증운전 결과
김민휘(Min-Hwi Kim),김득원(Deuk-won Kim),이동원(Dong-Won Lee),허재혁(Jaehyoek Heo) 대한설비공학회 2021 설비공학 논문집 Vol.33 No.9
In this study, a small-scale thermal network with multiple thermal energy prosumers was configured and a bi-directional heat supply operation for thermal energy sharing or heat trading was experimentally investigated. The conventional centralized thermal network was remodeled to bi-directional thermal network and two buildings, among the seven buildings, were retrofitted to the heat prosumer buildings. The heat prosumer buildings, including an absorption heat pump system and a geothermal heat pump system, were connected to four buildings devoid of heat production facility under the cooling and heating and hot water supply thermal network. Through this research work, it was proved that the bi-directional heat supply could be performed during five weeks cooling and heating operation in summer and winter. It was also found that the proposed bi-directional heat supply network construction method could be used to implement heat transactions between buildings on a heat network with multiple heat energy prosumers.