• 제목/요약/키워드: Air source heat pump

검색결과 286건 처리시간 0.023초

축열수조를 이용하는 열펌프식 난방의 특성에 관한 연구 (A Study on The Characteristics of Heat Pump Heating System Utilizing Heat Storage Tank)

  • 김효경;이기영;박문수;황인수
    • 대한설비공학회지:설비저널
    • /
    • 제16권4호
    • /
    • pp.392-405
    • /
    • 1987
  • A study of appling solar assisted heat pump heating system to Korean climatic charac-teritics has been undertaken through computer simulation using TRNSYS (A Transient System Simulation Program). It is insufficient for heating system composed of each of solar and heat pump system to supply heat met with heating load. So SAHP (Solar Assisted Heat Pump) heating systems which combined solar system with heat pump system are analized using the standard weather data of Korea. And SAHP heating systems are categorized into the series system in which the solar storage is used as the source for the heat pump, the parallel system in which ambient air is used as the source for the heat pump, and the dual source system in which the storage or ambient is used as the source depending on which source yields the lowest work input. These combined system are better than each of solar and heat pump heating system in view of thermal performance, and parallel system is most effective among these combined systems.

  • PDF

숙박업소 건물의 히트펌프 냉난방 시스템 적용을 위한 시뮬레이션 연구 (Study on the Simulation of Heat Pump Heating and Cooling Systems to Resident Building)

  • 최영돈;한성호;조성환;김주성;엄철준
    • 대한설비공학회:학술대회논문집
    • /
    • 대한설비공학회 2006년도 하계학술발표대회 논문집
    • /
    • pp.915-920
    • /
    • 2006
  • Recently available heat pump system by using air heat-source is not efficient. Because the mean temperature of korean winter season is low, economy of air heat-source heat pump descend, and COP is below 3.0. This paper was practiced the simulation on evaluation criteria for heat pump heating and cooling systems to resident building. As a result, heating and cooling composition heat pump system apply to the building needed to be provided heat source for 24 hours.

  • PDF

지열원 시스템 히트펌프의 냉방 성능 특성에 관한 실증 연구 (Verification experiment of a ground source multi-heat pump at cooling mode)

  • 임효재;강신형;최재호;최종민;문제명;권영석;권형진;김록희
    • 대한설비공학회:학술대회논문집
    • /
    • 대한설비공학회 2008년도 동계학술발표대회 논문집
    • /
    • pp.21-26
    • /
    • 2008
  • Recently, small and medium-sized buildings have employed a multi-heat pump. The major benefits of the multi-heat pump over a conventional system are that it is easier system to maintain along with a diversification of facility use, and high comfortability. The performance of multi-heat pump systems can be enhanced by using geothermal energy instead of air source energy. This paper describes the multi-heat pumps applied in an ground source heat pump system for an actual building. The performance of a ground source multi-heat pump installed in the field was investigated in cooling mode. The maximum COP of the systems with single U-tube and double tube ground loop heat exchangers were 6.6 and 6.0, respectively. It is suggested that the new algorithms to control the flow rate of secondary fluid for ground loop heat exchanger have to be developed in order to enhance the performance of the system.

  • PDF

대형 Community 건물의 연료전지 구동 복합열원 하이브리드 히트펌프 냉.난방 시스템 성능 해석 (The Study on the Performance of the Fuel Cell Driven Compound Source Hybrid Heat Pump Heating and Cooling System to Large Community Building)

  • 변재기;정동화;최영돈
    • 대한설비공학회:학술대회논문집
    • /
    • 대한설비공학회 2007년도 동계학술발표대회 논문집
    • /
    • pp.82-87
    • /
    • 2007
  • In the present study, the simulation on the annual performance evaluation of a renewable energy systems with fuel cell driven compound source hybrid heat pump systems is applied to the heating and cooling of large community building. The large community building has the economical advantage to apply heat pump cooling and heating systems the long period operation. If air and ground source hybrid heat pump systems are combined, COP of the system can be increased largely. Fuel cell driven compound source hybrid heat pump system can reduced the fuel cost as well as thermal storage tank sharply.

  • PDF

VRF 응용 Hybrid 공조시스템 Case Study (Case Study of Hybrid HVAC system Applied VRF)

  • 김성실;박완규;허인구
    • 대한설비공학회:학술대회논문집
    • /
    • 대한설비공학회 2008년도 하계학술발표대회 논문집
    • /
    • pp.357-362
    • /
    • 2008
  • The present study has been conducted variable refrigerant flow system applied building. Multi air-conditioning system has some benefits : easier building management and maintenance and energy saving. Recently, the system heat pump has been employed in medium-sized and tall buildings. However, the performance data and design method for system heat pump are limited in literature due to complicated system parameters and operating conditions. In the present study, case study of a system heat pump applied various building. The aim of this paper is to application multi air-conditioners and to inform the benefits of multi air-conditioners.

  • PDF

대형 Community 건물의 지열원 복합 하이브리드 히트펌프 시스템 성능에 관한 해석적 연구 (Analytical Study on the Performance of Ground Source Compound Hybrid Heat Pump System for Large Community Building)

  • 변재기;정동화;이종길;홍성호;최영돈;조성환
    • 한국신재생에너지학회:학술대회논문집
    • /
    • 한국신재생에너지학회 2008년도 춘계학술대회 논문집
    • /
    • pp.634-637
    • /
    • 2008
  • Ground source heat pumps are clean, energy-efficient and environment-friendly systems cooling and heating. Although the initial cost of ground source heat pump system is higher than that of air source heat pump, it is now widely accepted as an economical system since the installation cost can be returned within an short period of time due to its high efficiency. In the present study, performances of ground source compound hybrid heat pump system applied to a large community building are simulated. The system design and operation process appropriate for the surrounding circumstance guarantee the high benefit of the heat pump system applied to a large community building. If among several renewable energy sources, ground, river, sea, waste water source are chosen as available alternative energies are combined, COP of the system can be increased largely and hybrid heat pump system can reduced the fuel cost.

  • PDF

하천수 열원 이용 열펌프 시스템의 LCC 분석 (LCC Analysis of a Heat Pump System Using River Water)

  • 한상수;박차식;김용찬
    • 대한설비공학회:학술대회논문집
    • /
    • 대한설비공학회 2009년도 하계학술발표대회 논문집
    • /
    • pp.1424-1428
    • /
    • 2009
  • The performance of a heat pump using river water as a heat source was compared with that of a conventional air-conditioner for cooling and a boiler system for heating. The heat pump system using river water considered the 1-stage cycle for cooling and the 2-stage cycle for heating. The COPs of the river water source heat pump were $0.5{\sim}1.1$ higher than those of the conventional system in the cooling season. The LCC of the river water source heat pump system was lower 13.5% and 32.4% than that of the conventional system I and II. In addition, when the initial cost ratios of the river water source heat pump system to the conventional system I and II were less than 1.2 and 1.4, respectively, an acceptable payback was found to be less than 5 years.

  • PDF

지열히트펌프시스템의 냉방운전에 따른 성능연구 (Cooling Performance of a Ground Source Heat Pump System)

  • 이재근;정영만;구경민;황유진;장세용;김인규;진심원;이동혁
    • 대한설비공학회:학술대회논문집
    • /
    • 대한설비공학회 2007년도 동계학술발표대회 논문집
    • /
    • pp.441-446
    • /
    • 2007
  • This present study is to evaluate the cooling performance of a water-to-refrigerant ground source heat pump system(GSHP) under actually operating condition. 1 unit is selected among 10 units of the GSHP in the building to analyze the performance. The average cooling COP of the GSHP at the part load of 64% is 8.2, overall system COP is 6.19. In the GSHP system, the cooling temperature of the condenser is lower compared to the air source heat pump system. Conclusively, the cooling performance of the GSHP is higher than the air source heat pump system by 80%.

  • PDF

지역 기후 특성에 따른 지열시스템의 도입경제성 차이에 관한 연구 (Feasibility study of ground source heat pump system according to the local climate condition)

  • 남유진
    • KIEAE Journal
    • /
    • 제14권4호
    • /
    • pp.127-131
    • /
    • 2014
  • The ground source heat pump (GSHP) system is a kind of the temperature differential energy system using relatively stable underground temperature as heat source of space heating and cooling. This system can achieve higher performance of system than it of conventional air source heat pump systems. However, its superiority of the system performance is different according to installation location or local climate, because the system performance depends on the underground condition which is decided by annual average air temperature. In this study, in order to estimate the feasibility of the ground source heat pump system according to the local climate, numerical simulation was conducted using the ground heat transfer model and the surface heat balance model. The case study was conducted in the condition of Seoul, Daejeon, and Busan, In the result, the heat exchange rate of Busan was 34.33 W/m as the largest in heating season and it of Seoul was 40.61 W/m as the largest in cooling.

섬유벨트 열재생 시스템을 부착한 공기 열원 열펌프의 난방 성능 특성 (Performance of Air Source Heat Pump with a Fiber Belt Heat Regeneration System)

  • 유영선;장진택;김영중;강금춘;윤진하;이건중
    • Journal of Biosystems Engineering
    • /
    • 제25권5호
    • /
    • pp.385-390
    • /
    • 2000
  • The heat pump is one of heating and cooling systems driven by electricity using natural energy as a heat source. The heat pump system was mainly adopted to a cooling system or a refrigeration system. In regions with a large amount of electricity, it is used as a heating system or a heating and cooling system of houses, buildings and agricultural facilities. During cold weather, air source heat pumps do not work well because of some technical problems, such as frosting on evaporator coil when outside air temperature is below -5$^{\circ}C$. In this research, the heat regenerative technology was employed to eliminate the frosting on evaporator coil and improve the COP of the heat pump system. This fiber belt heat regeneration system(FBHRS) has very simple structure consisting of a geared motor and a porous fiber belt passing through alternatively between cold and warm air duct. The laboratory test showed that the heat pump system with a FBHRS yielded an impressive COP higher than 3.5 at the outside air temperature of -7$^{\circ}C$ in heating mode.

  • PDF