계간 축열조에서 매립방식과 이중외벽의 영향을 고려한 열손실 비교

김수환; 이현진; 이경호; 허재혁; 이동원

doi:10.7849/ksnre.2018.6.14.2.002

주제분류

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저널정보

한국신재생에너지학회
신·재생에너지 학술저널
신재생에너지 제14권 제2호(통권 제56호)
2018.6 2 - 8 (7page)
DOI : 10.7849/ksnre.2018.6.14.2.002

저자정보

김수환 (Kookmin University)
이현진 (Kookmin University)
이경호 (Korea Institute of Energy Research)
허재혁 (Korea Institute of Energy Research)
이동원 (Korea Institute of Energy Research)

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초록·키워드

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The integration of renewable energy systems is important for mitigating the weaknesses of individual energy sources and simultaneously fortifying their strengths. In the city of Jincheon, an eco-friendly town utilizes various renewable heat sources, such as solar thermal and geothermal energies, for block heating. Seasonal thermal energy storage (STES) plays a key role in integrating the heat sources. STES is charged mainly with the excess solar heat in summer and discharged in winter. Because STES uses the sensible heat of water with a long lifetime, it is critical to minimize the heat loss from STES. In this study, the heat loss was investigated numerically with a focus on the burial types of STES with and without an additional, surrounding concrete wall. The monthly steady-state heat losses were calculated using commercial software while considering the temperature-dependent and water-content-dependent thermal conductivity of the insulator and the thermal stratification of water inside the STES. The secondary outer wall did not necessarily improve the thermal insulation and a water content of 9% in the insulator could increase heat loss almost two fold.

#Seasonal thermal energy storage(계간 축열조) #Heat loss(열손실) #Thermal insulation(단열) #Water content(수분함유)