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변속 펌프의 에너지 효율 제어를 통한 HVAC 수배관 시스템의 에너지 절감
김서훈(Kim Seo-Hoon),곽노열(Kwak Ro-Yeul) 대한건축학회 2012 대한건축학회논문집 Vol.28 No.2
This paper presents the optimal control strategies for variable speed control systems in office building HVAC hydronic systems to improve their energy efficiencies. It is necessary to prepare a method for reducing energy through efficient energy management on such equipments. In case of regular building, a problem of wasting energy is caused as there is no control on disutility due to degradation of chiller’s performance by applying a constant water volume control system of a constant speed pump to HVAC hydronic system, pump power is wasted under part load operating condition, and there is no change of flow according to load variation. This study applied two strategies for controling energy efficiency through optimal control and operation of pumps of flow according to load variation by applying variable speed control to circulating pumps of the HVAC hydronic system. The first strategy for energy efficiency control is to reduce energy used in circulation part of the HVAC hydronic system through pump sequence control and operating number control by applying wire-to-water efficiency control of pumps. And the second one is an energy efficiency control strategy which controls speed of pumps which circulates and provide flow responding to the load through pressure different setpoint optimal control by using open signals of flow control valves with factors for operating optimal control of HVAC circulation pump system. The results showed that about 6.7?11.9% of heat source energy and 24.4?44.2% of pump energy could be saved by using these optimal control strategies.
노후 도서관 건물의 제로에너지 인증을 위한 진단 및 리모델링
이정훈(Lee, Jung-Hun),김서훈(Kim, Seo-Hoon),김종훈(Kim, Jong-Hun),류승환(Yoo, Seung-Hwan),송두삼(Song, Doo-Sam),정학근(Jeong, Hak-Geun) 한국건축친환경설비학회 2018 한국건축친환경설비학회 논문집 Vol.12 No.4
Most of domestic buildings have been over 15 years since their construction. The aged buildings tend to deteriorate thermal performance of envelopes and increase energy use. Therefore, green remodeling is carried out to improve the thermal performance of the aged buildings. There were a number of cases conducted remodeling of an existing building to improve a building performance. However, it is rare to remodel an existing building to zero energy level. In addition, there is no analysis on effects and considerations for remodeling to zero energy building level, neither standard remodeling manual for references. Therefore, it is currently being remodeled based on the knowledge and experience of the contractor. This study reviewed diagnostic and remodeling plans to remodel buildings to zero energy levels and tried to assist in the production of standard remodeling manuals. A target building constructed in 2000 was selected, and this study implemented several energy-efficiency measures: passive, active, and renewable. As a result, this study achieved 1 ++ level of the “Building Energy Saving Design Standard” and achieved zero energy building level.
유치원 건물에서 다중 히트펌프 시스템의 적용에 관한 실험적 연구
한설이(Seol-Yee Han),김서훈(Seo-Hoon Kim),장향인(Hyang-In Jang),이상혁(Sang-Hyeok Lee),서승직(Seung-Jik Suh) 대한설비공학회 2013 설비공학 논문집 Vol.25 No.10
We experimented with the energy saving effect of applying a multiplex heat pump system and suggests a dissemination plan for new and existing educational facilities. The development and dissemination of a new system could reduce energy consumption by up to 57%, and help solve environmental issues. Experimental performance evaluated in the kindergarten to analyze the energy saving effect of the cooling and heating system. The average daily COP of the cooling and heating period in the field test was 3.79. Our results showed that the annual energy consumption was reduced, and proved that the multiplex heat pump system is effective in reducing energy consumption.
소규모 사무소 건물의 단열강화에 따른 지역별 냉난방요구량 분석
이호진(Ho Jin Lee),반재희(Jea Hee Ban),김서훈(Seo Hoon Kim),박효순(Hyo-Soon Park),송규동(Kyoo Dong Song) 대한설비공학회 2012 대한설비공학회 학술발표대회논문집 Vol.2012 No.6
Being used energy in Korea, more than 22% are for building and it will expected to increase. The government is strengthening standards of insulation for reducing energy in building. This study targets the small office building, an analysis of local heating and cooling demand according to enhanced insulation using a ECO2(that is efficiency evaluation program of building energy)