Tunnel and Underground Space (터널과지하공간)

Korean Society for Rock Mechanics and Rock Engineering (한국암반공학회)
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Technologies of Underground Thermal Energy Storage (UTES) and Swedish Case for Hot Water

지하 열에너지 저장 기술 및 스웨덴 암반공동내 열수 저장 사례

  • 박도현 (한국지질자원연구원 지구환경연구본부) ;
  • 김형목 (한국지질자원연구원 지구환경연구본부) ;
  • 류동우 (한국지질자원연구원 지구환경연구본부) ;
  • 최병희 (한국지질자원연구원 지구환경연구본부) ;
  • 선우춘 (한국지질자원연구원 지반안전연구부) ;
  • 한공창 (한국지질자원연구원 지반안전연구부)
  • Received : 2012.01.25
  • Accepted : 2012.02.21
  • Published : 2012.02.29
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Abstract

Thermal energy storage is defined as the temporary storage of thermal energy at high or low temperatures for later use in need. The energy storage can reduce the time or rate mismatch between energy supply and demand, and thus it plays an important role in conserving energy and improving the efficiency of energy utilization, especially for renewable energy sources which provide energy intermittently. Underground thermal energy storage (UTES) can have additional advantages in energy efficiency thanks to low thermal conductivity and high heat capacity of surrounding rock mass. In this paper, we introduced the technologies of underground thermal energy storage and rock caverns for hot water storage in Sweden.

열에너지 저장은 고온 또는 저온의 열에너지를 임시 저장하는 것으로서 에너지 수요와 공급 사이의 불균형을 줄일 수 있고, 이를 통해 에너지를 절약하고 에너지 이용효율을 향상시킬 수 있다. 특히 간헐적으로 에너지를 생산하는 신재생에너지의 경우 에너지 저장 장치와의 조합은 필수적이다. 또한 지하 암반의 낮은 열전도도와 높은 열용량을 이용하여 지하에 열에너지를 저장하는 경우 열손실을 최소화하여 추가적인 효율 향상이 기대된다. 본 고에서는 지하 열에너지 저장 기술을 조사 분석하고 스웨덴에 암반공동내 열에너지 저장 사례를 소개하였다.

Keywords

References

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  2. Review on Thermal Storage Media for Cavern Thermal Energy Storage vol.22, pp.4, 2012, https://doi.org/10.7474/TUS.2012.22.4.243
  3. Thermal Stratification and Heat Loss in Underground Thermal Storage Caverns with Different Aspect Ratios and Storage Volumes vol.23, pp.4, 2013, https://doi.org/10.7474/TUS.2013.23.4.308