• Title/Summary/Keyword: 히트펌프

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A Study on Horizontal Ground Source Heat Pump Systems (수평형 지열원 히트펌프 시스템에 관한 연구)

  • Park, Yong-Jung;Kim, Kyoung-Hoon
    • Journal of Energy Engineering
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    • v.15 no.3 s.47
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    • pp.160-165
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    • 2006
  • Ground source heat pump (GSHP) or geothermal heat pump systems (GHPs) are recognized to be outstanding heating and cooling systems. Most of GSHP systems installed and studied in korea are vertical GSHP systems. A horizontal GSHP system was installed in greenhouse and investigated for the performance characteristics. The results of the study showed that the heating coefficient of performance of the heat pump was 3.64 and the overall heating coefficient of performance of the system was 3.31. The pumping power was obtained as 28.0 W/kW and the required ground heat exchanger length was 53.3 m/kW of rejection heat of condenser. The heat extraction rate was, on average, 14.58 W/m of ground heat exchanger length and trench length is 27.7 m/kW of rejection heat of condenser.

Analysis of Internal Temperature Change according to the Application of Thermal Insulation Paint and Heat Pump in Broilers (육계사의 차열 페인트 및 히트펌프 적용에 따른 내부 기온 변화 분석)

  • Jun-Seop Mun;Rack-Woo Kim;Seung-Hun Lee;Sang Min Lee;Sang Kyu Choi
    • Journal of Bio-Environment Control
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    • v.32 no.3
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    • pp.197-204
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    • 2023
  • Heat stress causes a decrease in immunity and disease occurrence in livestock, increasing mortality and impairing productivity. In particular, chickens are very vulnerable to high temperatures compared to other livestock species because their entire body is covered with feathers and sweat glands are not developed. Currently, air conditioning systems are essential in broiler houses to prevent high-air temperature damage to broilers, but conventional cooling facilities are greatly affected by the external environment, so there are limits to their use. In this study, to propose a cooling method, thermal insulation paint and a heat pump were apply in the broiler houses to evaluate the temperature reduction effect. The heat pump experiment was to analyze the cooling effect according to the change in ventilation rate and propose an appropriate. As a result of the experiment, the heat-insulating paint reduced the temperature of the broiler houses by maximum 1-2℃, and in the broiler houses where the heat pump was operated, the temperature decrease was the largest when the ventilation rate was the lowest. When the air temperature in the house is similar to or lower than the outside air temperature, it is considered to be most effective to use a heat pump while maintaining only the minimum ventilation rate.

Time Series Analysis of the Effect of Ground-source Heat Pumps on Groundwater Characteristics (시계열 분석을 이용한 지열히트펌프 가동에 따른 지하수특성변화 해석)

  • Mok, Jong-Gu;Lim, Hong-Gyun;Jang, Bum-Ju;Park, Yu-Chul;Lee, Jin-Yong
    • The Journal of Engineering Geology
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    • v.21 no.1
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    • pp.35-43
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    • 2011
  • Time series analysis was applied to groundwater level, water temperature, and electrical conductivity data obtained from monitoring wells around ground-source heat pumps at Sangji University of Wonju (standing column well type) and at Jungwon University of Goesan (closed loop type), from 21 May to 12 October 2010. We found large temporal variations in the characteristics of groundwater at Wonju, but only minor variations at Goesan. These results may improve our understanding of the effects of ground-source heat pumps on the characteristics of surrounding groundwater, according to the installation method for the pumps.

빙축열 및 히트펌프시스템 전문회사 '그들에게는 뭔가 특별한 것이 있다.'

  • 에너지절약전문기업협회
    • The Magazine for Energy Service Companies
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    • s.23
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    • pp.28-29
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    • 2003
  • 폐열을 이용한 히트펌프시스템은 에너지절감효과는 냉방시 $45\%$, 난방시 $75\%$, 급탕부하시 $67\%$정도이어서 가히 타의추종을 불허한다. 한국적 상황을 고려한 국내 최초의 폐열이용 히트펌프시스템이 될 이 사업의 투자비회수기간은 2.5년에 불과해 향후 휴양 및 숙박시설 등지에 큰 관심을 끌 것으로 최사장은 기대하고 있다.

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해외전력 - 유럽의 히트 펌프 시장의 동향

  • 일본 전기협회보
    • JOURNAL OF ELECTRICAL WORLD
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    • s.385
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    • pp.60-61
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    • 2009
  • 히트 펌프란, 공기, 지중, 지하수 등에서 얼마 안되는 동력으로 효율 있게 열에너지를 끌어올려 장소나 어떤 대상물을 덥게 하거나 차게 하는 에너지절약 기술이다. 일본 등에서는 최근, 이 에너지절약 기술이 $CO_2$ 배출을 억제하는 지구온난화 대책으로서 주목을 받고 있으며, 유럽에서도 일본에 비해 규모는 크지 않으나 히트 펌프 시장이 급속히 확대되고 있다.

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고효율 멀티히트펌프를 위한 평가기술

  • Choe, Jun-Yeong
    • The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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    • v.39 no.11
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    • pp.27-32
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    • 2010
  • 멀티히트펌프 시스템의 시장동향 및 기술동향을 분석하고 향후 경제적, 기술적 파급효과 등을 예측하여 멀티히트펌프 시스템의 산업발전기여 효과를 소개하고자 한다.

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멀티히트펌프 시스템의 보급현황 및 산업발전기여도

  • Kim, Yong-Chan;Heo, Jae-Hyeok
    • The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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    • v.39 no.11
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    • pp.11-16
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    • 2010
  • 멀티히트펌프 시스템의 시장동향 및 기술동향을 분석하고 향후 경제적, 기술적 파급효과 등을 예측하여 멀티히트펌프 시스템의 산업발전기여 효과를 소개하고자 한다.

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Performance Simulation of Geothermal Heat Pump (GHP) System with Different Control Schemes (제어 방식에 따른 지열 히트펌프 시스템의 성능 시뮬레이션)

  • Lee, Doo-Young;Choi, Jae-Ho;Min, Kyong-Chon;Sohn, Byonghu
    • Transactions of the KSME C: Technology and Education
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    • v.4 no.1
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    • pp.35-41
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    • 2016
  • Geothermal heat pump (GHP) systems have been proved to be one of the most efficient systems for heating and cooling in buildings. However, an optimal energy performance depends on a good control of the system components, including heat pumps and circulation pumps, which affect to the total energy consumption of system. This paper presents the simulation results of the heat pump performance for two different control schemes, i.e. constant setting temperature (Control-A) and variable setting temperatures (Control-B) in buffer tank. A dynamic simulation tool, TRNSYS 17, was used to model the entire system and to assess the performance of the system. Simulation results show that the Control-B, which controls the temperature in buffer tank with outdoor air temperature, is a effective way to reduce the energy consumptions in heat pump (7.7%) and circulation pump (7.5%).

Development of Analysis Model for High-Performance Heat Pump (고성능 히트펌프 해석모델 개발 연구)

  • Yim, Sang-Sik;Kim, Ki-Bum;Park, Sung-Young
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.14 no.12
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    • pp.6053-6059
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    • 2013
  • Heat pumps have attracted considerable attention as a green energy system because they use renewable energy, such as geothermal, solar energy and waste heat, and can have a low electricity consumption rate compared to other conventional electric heating system. Many studies of high efficient heat pump system design was performed previously,but it is not easy to find any an analytical model that consists of components (e.g. compressor, heat exchangers, and expansion valve), not only having an interrelation and interconnection each other but also being flexible to any change in geometry and operating parameters. In this study, a computational model was developed for a heat pump with warm air as a heat source using the one-dimensional modeling software, AMESim. In combination with an independently-developed analytical model for a scroll compressor, the heat pump model can simulate the physical characteristics and actual behavior of the heat pump precisely. In addition, the reliability of the model was improved by verifying the simulation results using experimental data. The simulation data fell into the 10% error range compared with the experimental data. The heat pump model can be used for system optimization studies of product development and applied to other applications in a range of industrial field.

Empirical evaluation of the heating performance by a heat pump system with surplus heat from a greenhouse (온실 태양잉여열을 이용한 히트펌프시스템의 난방 성능평가에 관한 실증 연구)

  • Jeon, Byung-Yong;Park, Youn-Cheol;Ko, Gwang-Soo
    • Journal of Advanced Marine Engineering and Technology
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    • v.41 no.1
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    • pp.99-104
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    • 2017
  • This study evaluated the heating performance of a hybrid heat pump system. The system was installed in a $100-m^2$ greenhouse to utilize surplus solar energy. A hybrid heat pump system was installed at Jocheon-ri, Jeju Island, for an empirical evaluation of the performance. The system consists of a heat storage tank and plate heat exchangers for several heat exchanges between the greenhouse and heat pump or storage tank. The system uses R410a as the working fluid and is controlled automatically by a defined set temperature of the greenhouse. This system incorporates two kinds of heat sources: outdoor air and a storage tank that collects heat from the topside of the greenhouse. The results showed that the heating capacity was 19.9 kW in the outdoor air source mode and 21.4 kW with direct heating from hot water in the thermal storage tank. These results are very similar to those of a previous study.