• Title/Summary/Keyword: 냉난방에너지

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A Study on Application of Geothermal Heatpump System for Apartments (공동주택용 지열냉난방 적용성 검토 연구)

  • Baek, Sung-Kwon;Ahn, Hyung-Jun;Lee, Dong-Cheul;Im, Seung-Kyun
    • 한국신재생에너지학회:학술대회논문집
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    • 2009.06a
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    • pp.574-578
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    • 2009
  • Residential is the biggest market for geothermal heatpump systems in the world. However It could not be considered as a big market in Korea. Serious problems are hidden. In this paper, I will discuss about with other problems that we must solve.

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Effect analysis of geothermal cooling and heating system (지열(수온차)냉난방 시스템 효과 분석)

  • Chung, Hoon;Ma, Bum-Gu
    • 한국신재생에너지학회:학술대회논문집
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    • 2008.10a
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    • pp.365-368
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    • 2008
  • This experiment is significant because we can provide information by measuring effect of energy saving for whom plan to install a geothermal heat & cooling system. The result shows geothemal system can save about 50% of energy(heating : 35%, cooling : 60%) and we verified that when using curtain can help saving $4{\sim}12%$ of energy additionally

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The Energy Performance & Economy Efficiency Evaluation of Microturbine Installed in Hospital buildings (대형병원에서 마이크로터빈 이용한 열병합시스템 에너지성능 및 경제성 분석)

  • Kim, Byung-Soo;Gil, Young-Wok;Hong, Won-Pyo
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.23 no.12
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    • pp.176-183
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    • 2009
  • Distributed generation(DG) of combined cooling, heat, and power(CCHP)has been gaining momentum in recent year as efficient, secure alternative for meeting increasing energy demands. This paper presents the energy performance of microturbine CCHP system equipped with an absorption chiller by modelling it in hospital building. The orders of study were as following. 1)The list and schedule of energy consumption equipment in hospital were examined such as heating and cooling machine, light etc. 2) Annual report of energy usage and monitoring data were examined as heating, cooling, DHW, lighting, etc. 3) The weather data in 2007 was used for simulation and was arranged by meteorological office data in Daejeon. 4) Reference simulation model was built by comparison of real energy consumption and simulation result by TRNSYS and ESP-r. The energy consumption pattern of building were analyzed by simulation model and energy reduction rate were calculated over the cogeneration. As a result of this study, power generation efficiency of turbine was about 30[%] after installing micro gas turbine and lighting energy as well as total electricity consumption can be reduced by 40[%]. If electricity energy and waste heat in turbine are used, 56[%] of heating energy and 67[%] of cooling energy can be reduced respectively, and total system efficiency can be increased up to 70[%].

Development of a New Heat Exchanger for the Super Cooling (HESC) to Enhance the Performance of the Heat Pump System for the Living Space by the Natural Energy (자연에너지를 이용한 생활공간 냉난방용 열펌프의 성능향상을 위한 과냉 촉진 신개념 열교환기(HESC) 개발)

  • Song, Heon
    • Journal of the Korean Solar Energy Society
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    • v.31 no.6
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    • pp.40-48
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    • 2011
  • 과냉 촉진을 위한 새로운 열교환기(HESC)가 생활공간의 냉난방을 위한 공기-물 열펌프의 성능계수 향상을 위해 본 연구에서 개발되었으며 그 효과를 실험적으로 분석하였다. 이 열교환기(HESC)는 여러 단계의 셀과 튜브로 구성되어 있으며, 열펌프 시스템의 응축기와 증발기 사이에 장착되었다. 실험 조건으로, 외기온은 $7^{\circ}C$에서 $-17^{\circ}C$, 입구 물 온도는 $7{\sim}10^{\circ}C$ 그리고 제 2열전달매체로서 물의 질량 유동율은 시간당 100에서 $300{\ell}$로 변화를 주었다. 본 실험에서 이 열교환기가 장착된 열펌프의 압축기에서의 냉매 입 출구 사이의 온도 차이는 열교환기가 장착되지 않은 열펌프보다 $15^{\circ}C$ 높았다. 이에 따라 이 열교환기가 장착된 열펌프 시스템은 외기온 $-10^{\circ}C$에서 COP가 0.8 증가하였다. 따라서 이 공기-물 열펌프 시스템은 최근 한국에서 실용화되고 있는 고비용이 요구되는 지열 열펌프 시스템을 대체하여 생활공간을 위한 냉난방 시스템으로서 중요한 역할을 할 수 있을 것으로 사료된다.