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고광수(G. S. Ko),김지영(J. Y. Kim),박윤철(Y. C. Park) 한국동력기계공학회 2005 한국동력기계공학회 학술대회 논문집 Vol.- No.-
The people, who working for research area, interest is being directed at the renewable energy. In this study, a heat pump system with multi heat source analyzed by experimentally. The heat sources of the study are solar energy and air. The principal advantage of employing solar as a heat source of the heat pump system is that the solar provides heat at high temperature level compare with the other heat source such as river, ground etc. and provides higher COP to a heat pump. Another advantage in multi heat source heat pump system is on stability of the system compare with a heating system using only solar as heat source. As results, the developed system in this study shows high efficiency with stabile operation for heating of domestic house.
태양광열 복합 모듈을 활용한 공기열원 히트펌프 실외기 가열 시스템 개발
주홍진(Joo Hong-Jin),안영섭(An Young-Sub),이경호(Lee Kyoung-Ho) 한국태양에너지학회 2023 한국태양에너지학회 논문집 Vol.43 No.6
In this study, a convergence technology that can be linked with photovoltaic thermal (PVT) modules was derived to increase the performance and efficiency of air source heat pumps that are currently most widely used as cooling, heating, and domestic hot water supply equipment in public buildings. The solar energy and air source heat pump convergence technology developed through this study was an indirect supply type outdoor unit heating system that supplied heat energy acquired through a PVT module by increasing the temperature of the air flowing into the outdoor unit when the heat pump heating mode was operating. A bench-scale test device was designed and manufactured to verify the performance of the outdoor unit heating system of an air source heat pump using a PVT module. The performance evaluation confirmed that the heating performance of the air source heat pump was improved compared with that of the conventional air source heat pump without the heating system under the same test conditions. In addition, the heating demonstration was performed by applying the air source heat pump outdoor unit heating system using a PVT module to the air source heat pump installed at the Seodaemun Fire Station Hongeun 119 Safety Center, where an actual public building was remodeled. Consequently, the air source heat pump was heated. The analysis revealed that COP increased by more than 0.5.
한창호(Changho Han),김진영(Jinyoung Kim),조원희(Wonhee Cho),김용찬(Yongchan Kim) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
In this study, solar-assisted raw-water source heat pumps(SA–RWSHPs) are investigated to prevent performance degradation owing to low water source temperature during the heating season. Solar collectors in the SA–RWSHPs are used to increase the heat source temperature in winter. The water source temperature and performance of the SA–RWSHP are analyzed according to flow rate of water source, solar sources and source side of heat pumps in detail. Furthermore, the unit and system COP of heat pumps are analyzed through the dynamic simulation. The raw-water source temperature and the unit COP of the SA–RWSHPs in winter were on average of 7.5℃ and approximately 24% higher, respectively, than those of the conventional RWSHPs. Additionally, the system COP of the SA-RWSHPs was approximately 21% higher than that of the RWSHPs owing to the solar collectors that were used to heat the domestic hot water, reducing the energy consumption of the auxiliary heater of hot water storage tank. The proposed SA–RWSHPs showed a good performance throughout the year, resulting in reducing the energy consumption of buildings.
태양열 및 지열 이용 히트펌프 시스템의 성능예측 시뮬레이션에 관한 연구
남유진(Nam Yu-Jin),까오신양(Gao Xin-Yang) 한국태양에너지학회 2014 한국태양에너지학회 논문집 Vol.34 No.3
Recently, the use of renewable energy has been attracted due to the interest in energy-saving and the reduction of CO2 emission. In order to reduce the energy consumption of the cooling and the heating in the field of the architectural engineering, heat pump systems using renewable energy have been developed and used in various applications. In many researches, integrated heat pump systems are suggested which use solar and geothermal heat as the heat source for cooling and heating. However, it is still difficult to predict the performance of the systems, because the characteristic of heat exchange in each system is complicated and various. In this system, the performance prediction simulation of the heat pump was developed using a dynamic simulation model. This paper describes the summary of the suggested systems and the result of the simulation. The average temperature of the heat source, heating loads and COP were calculated with the cases of different local conditions, different system composition and different operation time by TRNSYS 17.
태양열 지열 통합 시스템의 설계 수법에 관한 해석적 연구
까오신양(Gao Xin-Yang),남유진(Nam Yu-Jin) 한국태양에너지학회 2013 한국태양에너지학회 학술대회논문집 Vol.2013 No.11
Recently, the interest on the research of heat pump system using solar and geothermal heat has been growing according to increasing interest in the reduction of building energy consumption and CO2 emission. However, the wide-spread of the system is not going along due to the incomplete of design method, the complexity of design and installation, so on. In this study in order to establish the optimum design method of the system, simulation was developed using a building load medol and individual system modules. Further more, the system performance has been calculated by case studies.
해수 열원 히트펌프와 태양광 발전을 이용한 순환여과식 양식장의 에너지 절감 효과 분석
류종혁,정현석,정석권 한국수산해양기술학회 2024 수산해양기술연구 Vol.60 No.2
본 연구에서는 해수 열원 히트펌프를 이용한 순환여과식 양식 시스템과 태양광 발전의 에너지 절감 효과를 분석하는데 초점을 두고 있다. 동적 시뮬레이션을 통한 열부하 분석을 바탕으로 순환여과식 양식 시스템의 연간 에너지 사용량을 분석하고 태양광 발전 시스템 활용에 따른 에너지 절감 효과를 평가하였다. 열부하 분석 시 양식장이 위치한 해역, 사육조의 종류, 사육수의 순환율 등을 고려하였다. 또한 정전 시 사육수의 수온을 유지하기 위해 요구되는 비상전원으로서 기존 디젤 발전기 대신 에너지 저장장치를 적용할 때 운전 시간별 적정 용량 결정 방법을 살펴보았다. 이 결과는 4개의 해역 중 제주가 약 45%의 에너지 절감 효과로, 태양광 발전을 이용하여 가장 높은 에너지 절감 성능을 달성하였음을 시사한다. This study focuses on analyzing the energy-saving effects of the recirculation aquaculture system using seawater source heat pumps and solar power generation. Based on the thermal load analysis conducted using the transient system simulation tool, the annual energy consumption of the recirculation aquaculture system was analyzed and the energy-saving effects of utilizing the photovoltaic system was evaluated. When analyzing the heat load, the sea areas where the fish farms are located, the type of breeding tank, and the circulation rate of breeding water were taken into consideration. In addition, a method for determining the appropriate capacity for each operation time was examined when applying the energy storage system instead of the existing diesel generator as an emergency power, which is required to maintain the water temperature of breeding water during power outage. The results suggest that, among the four seas considered, Jeju should be estimated to achieve the highest energy-saving performance using the solar power generation, with approximately 45% energy savings.