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지열원 및 수열원 비율에 따른 복합열원 히트펌프시스템 성능 평가 연구
박시훈(Sihun Park),고유진(Yujin Ko),민준기(Joonki Min) 한국지열·수열에너지학회 2021 한국지열에너지학회논문집 Vol.17 No.2
In this study, combined heat source heat pump system was implemented with 4 single heat source heat pumps each applied with a geothermal source and a water source. Five cases (Case1~Case5) were configured to conduct a performance comparison and analysis of the combined heat source heat pump system. First of all, as a result of analyzing the heat source, the case when 4 ground heat sources were applied (Case1) showed a uniform EST(Entering Source Temperature) distribution throughout the year since it is less affected by outside air compared to the case when 4 water heat sources were applied (Case5). In both winter and summer, the ground heat source maintained higher EST than the water heat source. Therefore, the system with high ratio of geothermal sources is advantageous for heating, and with high ratio of water heat sources is advantageous for cooling.
스마트팜에서 지열원과 수열원으로 구성된 복합열원 히트펌프 시스템의 에너지 성능 평가 연구
박시훈(Sihun Park),한혜린(Hyerin Han),홍희기(Hiki Hong),민준기(Joonki Min) 대한설비공학회 2021 설비공학 논문집 Vol.33 No.11
This study conducted an energy performance evaluation by applying a composite heat source heat pump system to artificial light-type smart farms, simulating a total of five cases (Cases 1 to Case 5) including a heat pump system with Ground heat source and Water heat source, respectively. In Case 2, the average COP in May for cooling was 5.23 and the energy consumption was 19.69 MWh. This resulted in a 9.75% lower COP compared to Case 4 and a 9.14% higher energy requirement. In Case 2, the average December COP for heating was 2.37 and the monthly average minimum energy consumption was 34.66 MWh. This resulted in a 4.22% higher COP compared to Case 4 and a 4.52% lower energy requirement. Artificial light-type smart farms require cooling even in winter due to lighting loads. Underground temperature rises due to their relatively high cooling loads compared to heating loads. Therefore, it is necessary to construct a system in a way that can suppress the increase in underground temperature.
복합열원 히트펌프 최적 제어를 위한 열원에 따른 히트펌프 성능 및 에너지 소요량 패턴 비교
고유진(Yujin Ko),박시훈(Sihun Park),민준기(Joonki Min) 한국지열·수열에너지학회 2020 한국지열에너지학회논문집 Vol.16 No.4
The investment in the technology of using a combined heat source is insufficient, which utilizes the advantages of various heat sources to maximize the potential energy and at the same time increases the performance of the heat pump. In this study, as basic data for the development of a high-efficiency hybrid heat pump system that actively connects and uses various heat sources, simulations were conducted for the heat pumps in two cases where geothermal and hydrothermal heat were applied respectively. In May, COP increased by about 27.3% compared to geothermal heat. In February, the COP percentage decrease of hydrothermal heat compared to geothermal heat is –6.9%. In May, total energy consumption can be reduced by 21.1% when hydrothermal is applied compared to geothermal heat. In February, the total energy consumption increases by 3.4%.