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학교 건물에 적용된 지열 히트펌프 시스템의 냉난방 성능 시뮬레이션
손병후(Byonghu Soh),김광수(Kwng Soo Kim),임효재(Hyo Jae Lim) 대한설비공학회 2019 대한설비공학회 학술발표대회논문집 Vol.2019 No.-
Ground-source heat pump(GSHP) systems have become an efficient alternative to conventional cooling and heating methods due to their higher energy using efficiency. These systems use the ground as a heat source in heating and a heat sink in cooling mode operation. The purpose of this simulation study is to evaluate the performance of a hypothetical GSHP system in an school building. We collected various data of building specifications and construction materials for an actual school building(10,432 ㎡) in Seoul and then modeled to calculate the hourly building loads with SketchuUp and TRNSYS V17. In addition, we used GLD(Ground Loop Design) V2016, a GSHP system design and simulation software tool, to evaluate hourly and monthly performance of the GSHP system. The energy consumption for the GSHP system based on the hourly simulation results were estimated to be 76.6 MWh/year for cooling and 187.0 MWh/year for heating. The seasonal performance factor(SPF) of the GSHP system was also calculated to be in the range of 3.2∼5.0.
하이브리드 지중열교환기 적용 지열 히트펌프 시스템의 난방 성능
손병후(Byonghu Sohn),김광수(Kwng-Soo Kim),강성재(Sungjae Kang),임효재(Hyojae Lim) 대한설비공학회 2020 대한설비공학회 학술발표대회논문집 Vol.2020 No.6
This paper presents the measurement and analysis results of the heating performance of a ground-source heat pump(GSHP) system using vertical ground heat exchanger(VGHE) and surface water heat exchanger(SWHE). In order to measure the heating performance of the system, we installed monitoring equipment including sensors for measuring temperature and power consumption, and then measured operation parameters. From measurement results, we analyzed the effect of combination ratios of the HGHE on the performance of the system. The average heating coefficient of performance(COPh) of the heat pump was 3.86, while the entire system was 2.78 over the measurement period. In steady state, COPh was slightly decreased with an decrease of entering source temperature. In addition, the application of HGHE was beneficial to the system performance; however, further research are needed to optimize the design data.