• Title/Summary/Keyword: Geo-source heat pump

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A Study on the Operating Characteristics of Solar Collecting System in Solar Thermal/Geothermal Hybrid System with Facade Integrated Solar Collector (Facade 일체형 태양열 집열기를 갖는 태양열/지열 하이브리드 시스템의 태양열 집열시스템 작동특성 연구)

  • Baek, Nam-Choon;Lee, Jin-Kook;Yu, Chang-Kyun;Yoon, Eung-Sang;Yoon, Jong-Ho
    • Journal of the Korean Solar Energy Society
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    • v.30 no.5
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    • pp.69-76
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    • 2010
  • In this study, the solar thermal and geo-source heat pump(GSHP) hybrid system for heating and cooling of Zero Energy Solar House(ZESH) was analyzed by experiment. The GSHP in this hybrid system works like as aback-up device for solar thermal system. This hybrid system was designed and installed for Zero Energy Solar House (KIER ZeSH) in Korea Institute of Energy Research. The purpose of this study is to find out that this system is optimized and operated normally for the heating load of ZeSH. The analysis was conducted as followings ; - the thermal performance of facade integrated solar collector - the on/off characteristics of solar system and GSHP - the contribution of solar thermal system. - the performance of solar thermal and ground source heat pump system respectively. - the meet of thermal load (space and water heating load). This experimental study could be useful for the optimization of this system as well as its application in house. This hybrid system could be commercialized for the green home if it is developed to a package type.

Study on COP Variations with the duration of Ground Source Heat Pump Systems Operation (지열히트펌프의 작동시간 경과에 따른 COP 변화에 대한 연구)

  • Lee, Yonggyu;Baek, Namchoon;Yoon, Eungsang
    • 한국신재생에너지학회:학술대회논문집
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    • 2010.06a
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    • pp.198.2-198.2
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    • 2010
  • In this study, the COP variation with the duration of Ground Source Heat Pump (GSHP) systems operation was analyzed by experiment. This experimental facility was installed in residential house as a back-up device of solar thermal heating system. The capacity of heat pump is 2.5 kW with a vertical bore hole of 150m depth. The COP of GSHP is varied, depending on the ground temperature which is used as a heat source. The ground heat source temperature influencing heating COP is the soil or rock temperature which adjoin with geo-source heat exchanger. This temperature is decreased rapidly according to the operation duration of heat pump. As a result, COP of GSHP is decreased to 3 in one hour of continuous operation time.

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

  • Kim, Seong-Sil;Park, Wan-Kyu;Hur, Inn-Ju
    • Proceedings of the SAREK Conference
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    • 2008.06a
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    • pp.357-362
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    • 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.

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Thermal Conductive Characteristics and Basic Properties of Bentonite Grouts for the Ground Heat Exchanger of Geo-source Heat Pump (지열히트펌프 지중열교환기용 벤토나이트계 그라우트재의 열전도특성 및 기본성능)

  • Bai, Kang
    • Journal of the Korean Solar Energy Society
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    • v.33 no.1
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    • pp.66-72
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    • 2013
  • In this study, the thermal conductive characteristics and basic properties of the nine commercial products of bentonite grouts were studied. Six of the nine products for ground heat exchanger systems are imported and others for civil engineering are domestic. The thermal conductivities of all bentonite products are nearly similar among products. The free swell indexes, viscosities and filter losses of the ground heat exchanger grouts are lower than those of the civil engineering ones. These characteristics seem to increase of the fluidity to fill the bentonite slurry to bore-hall perfectly, rather than to prevent underground water penetration. Thus, the mixtures of bentonites and sands are recommended for high thermal conduction grouts.

A Study on the Energy Self-Sufficiency of KIER Zero Energy Solar House II (제로에너지 솔라하우스(KIER ZESH-II)의 에너지 자립도에 대한 연구)

  • Jeong, Seonyeong;Baek, Namchoon;Yoo, Changkyoon;Yoon, Jongho
    • 한국신재생에너지학회:학술대회논문집
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    • 2010.06a
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    • pp.199.1-199.1
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    • 2010
  • The purpose of this study is on the thermal performance evaluation of KIER Zero Energy Solar House-II, called ZeSH-II which can be sustained with the support of a very few energy. This ZeSH-II was designed and constructed in the end of 2009 to develop for the goal of 70% self-sufficiency. Several key technologies like as the super insulation, high performance window, wast heat recovery system as well as solar power and thermal system and geo-source heat pump wear used for this ZeSH-II. The monitering of ZeSH-II was conducted for six months from November 2009 to April 2010. The monthly energy consumption was calculated based on the monitering results. As a result, the ZeSH-II shows that the energy self-sufficiency during six months(from oct. to apr.) is about 80% which is higher than that of the target.

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The Study on the Energy self-sufficiency and Economic Analysis of KIER Zero Energy Solar House (제로에너지 솔라하우스(KIER ZeSH)의 에너지 자립도 및 경제성 분석)

  • Jeong, Seonyeong;Baek, Namchoon;Yoo, Changkyoon;Yoon, Eungsang;Yoon, Jongho
    • 한국신재생에너지학회:학술대회논문집
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    • 2010.11a
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    • pp.64.1-64.1
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    • 2010
  • In this study, the energy and economic analysis of KIER Zero Energy Solar House (KIER ZeSH) was carried out. KIER ZeSH was designed and constructed in the end of 2009 for the purpose of more than 70% energy self-sufficiency in total load as well as less than 20% of additional construction cost. The several building energy conservation technologies like as super insulation, high performance window, wast heat recovery system, etc and renewable energy system. The renewable heating and cooling system is a kind of solar thermal system combined with geo-source heat pump as a back-up device. The capacity of 3.15kW solar BIPV system was also installed on the roof. The measurement by monitering system of ZeSH was conducted for one year from November 2009 to October 2010. The energy self-sufficiency and economic analysis were conducted based on the this monitering result. As a result, the energy self sufficiency is about 83% which is higher than that of the target and the payback period is 11 years.

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