• Title/Summary/Keyword: 수평형 지열 히트펌프

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A Study on the Horizontal Ground Source Beat Pump Greenhouse Heating System with Thermal Storage Tank (축열조를 채용한 수평형 지열원 히트펌프 온실 난방 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.194-201
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    • 2006
  • Greenhouses should be heated during nights and cold days in order to fit growth conditions in greenhouses. Ground source heat pump (GSHP) systems are recognized to be outstanding heating and cooling systems. A horizontal GSHP system with thermal storage tank was installed in greenhouse and investigated the performance characteristics. The reasons for using thermal storage tank were discussed in detail. Thermal storage tank can provide heat for heating load that is larger than GSHP system heating capacity. The results of study showed that the heating coefficient of performance of the heat pump system was 2.69.

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.

A Study on the description of Horizontal Geothermal Heat pump Type on Small Residential House (소규모 주택에 대한 수평형 지열 히트펌프 형태 결정에 관한 연구)

  • Yun, Jang-Ryeol;Cho, Sung-Woo;Choi, Jung-Min
    • 한국태양에너지학회:학술대회논문집
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    • 2011.11a
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    • pp.328-332
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    • 2011
  • The conclusion is derived from the arranged results and using a simulation by determining the shape of an optimum heat pump which is appropriate for small scale houses. It is concluded as 3 meters long for the laying depth of underground piping of the horizontal type geothermal heat pump system in regard to the 5 RT capacity standard that is suitable for a small scale house. The shape of the horizontal type geothermal heat pump system for a small scale house is theThree pipe shape whose trench length is short and pipe length laid in a trench is short. It is 9 for the number of laying pipes that is most appropriate to system.

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Experimental Study for Horizontal Geothermal Heat Pump Heating Performance Analysis (수평형 지열 히트펌프 난방 성능 분석을 위한 실험적 연구)

  • Ihm, Pyeong chan;Cho, Sung woo
    • Journal of the Korean Society for Geothermal and Hydrothermal Energy
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    • v.12 no.2
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    • pp.7-12
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    • 2016
  • This study have an objective to suggest basic data and measured result of heating performance on water-water type horizontal geothermal heat pump which is based on heating and cooling load calculation result of small residential house. The average temperature during measured periods is $9.4^{\circ}C$ on primary EWT and is $7.6^{\circ}C$ on primary LWT. The temperature difference shows $1.8^{\circ}C$ as average temperature. Because the average outdoor temperature of peak is lager than on December and than on January, the temperature difference between EWT and LWT is bigger that on January than that on December. The system COP is 3.62.

Performance Analysis on Combined Horizontal Ground Source Heat Pump with Earth tube using EnergyPlus (EnergyPlus를 이용한 수평형의 지열 히트펌프와 어스튜브를 조합한 시스템의 성능 검토)

  • Cho, Sung-Woo
    • Journal of the Korean Society for Geothermal and Hydrothermal Energy
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    • v.13 no.2
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    • pp.22-29
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    • 2017
  • This study is performed to performance of the combined system the GSHP (Ground Source Heat Pump) system with the Earth tube system using EnergyPlus program. The Earth tube system using fan is characteristics as supply lower (higher) air temperature than outdoor air temperature in cooling and heating seasons, the GSHP system is characteristics as small indoor air temperature variation range. As the results of Earth tube + GSHP system simulation, GSHP power can be reduced than the GSHP single operation as 17.3% in cooling seasons and 32.5% in heating seasons, the GSHP design capacity can be replaced more small size.

Performance Analysis of Ground-Coupled Heat Pump System with Slinky-Type Horizontal Ground Heat Exchanger (수평형 지열 히트펌프 시스템의 냉난방 성능 분석)

  • Sohn, Byong-Hu
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.24 no.3
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    • pp.230-239
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    • 2012
  • Ground-coupled heat pump (GCHP) systems utilize the immense renewable storage capacity of the ground as a heat source or sink to provide space heating, cooling, and domestic hot water. The main objective of the present study is to investigate the cooling and heating performance of a small scale GCHP system with horizontal ground heat exchanger (HGHE). In order to evaluate the performance, a water-to-air ground-source heat pump unit connected to a test room with a net floor area of 18.4 m2 and a volume of 64.4 m3 in the Korea Institute of Construction Technology ($37^{\circ}39'N$, $126^{\circ}48'E$) was designed and constructed. This GCHP system mainly consisted of slinky-type HGHE with a total length of 400 m, indoor heat pump, and measuring devices. The peak cooling and heating loads of the test room were 5.07 kW and 4.12 kW, respectively. The experimental results were obtained from March 15, 2011 to August 31, 2011 and the performance coefficients of the system were determined from the measured data. The overall seasonal performance factor (SPF) for cooling was 3.31 while the system delivered heating at a daily average performance coefficients of 2.82.

Performance Analysis of the Horizontal Ground Source Heat Pump for Greenhouse (시설원예용 수평형 지열 히트펌프 시스템의 성능분석)

  • Park, Yong-Jung;Kang, Shin-Hyung
    • Proceedings of the SAREK Conference
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    • 2007.11a
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    • pp.447-452
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    • 2007
  • Greenhouses should be heated during nights and cold days in order to fit growth conditions in greenhouses. Ground source heat pump(GSHP) or geothermal heat pump system(GHPs) is recognized to be outstanding heating and cooling system. Horizontal GSHP system is typically less expensive than vertical GSHP system but requires wide ground area to bury ground heat exchanger(GHE). In this study, a horizontal GSHP system with thermal storage tank was installed in greenhouse and investigated as performance characteristics. In the daytime, heating load of greenhouse is very small or needless because solar radiation increases inner air temperature. The results of study showed that the heating coefficient of performance of the heat pump ($COP_h$) was 2.9 and the overall heating coefficient of performance of the system($COP_{sys}$) was 2.4. Heating energy cost was saved 76% using the horizontal GSHP system with thermal storage tank.

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A Study on Field test of the Horizontal Ground Source Heat Pump for Greenhouse (시설원예용 수평형 지열히트펌프 시스템 실증연구)

  • Park, Yong-Jung;Kang, Shin-Hyung
    • 한국신재생에너지학회:학술대회논문집
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    • 2007.11a
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    • pp.505-510
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    • 2007
  • Greenhouses should be heated during nights and co Id days in order to fit growth conditions in greenhouses. Ground source heat pump(GSHP) or geothermal heat pump system(GHPs) is recognized to be outstanding heating and cooling system. Horizontal GSHP system is typically less expensive than vertical GSHP system but requires wide ground area to bury ground heat exchanger (GHE). In this study, a horizontal GSHP system with thermal storage tank was installed in greenhouse and investigated as performance characteristics. In the daytime, heating load of greenhouse is very small or needless because solar radiation increases inner air temperature. The results of study showed that the heating coefficient of performance of the heat pump($COP_h$) was 2.9 and the overall heating coefficient of performance of the system($COP_{sys}$) was 2.4. Heating energy cost was saved 76% using the horizontal GSHP system with thermal storage tank.

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