충전층을 이용한 암반공동 열에너지저장시스템의 열에너지 수지 분석
Thermal Energy Balance Analysis of a Packed Bed for Rock Cavern Thermal Energy Storage
2
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
충전층을 이용한 열에너지저장 시스템은 자갈이나 콘크리트와 같은 열저장매질과 공기나 오일과 같은열전달유체를 이용하여 현열에너지를 저장하는 방식으로서, 저장매질의 경제성과 화학적 안정성, 시스템 구축의용이성 등 많은 장점이 갖는다. 본 연구에서는 충전층을 이용한 열에너지저장 기술에 대하여 개략적으로 소개하고, 이러한 열에너지저장소의 에너지 수지와 성능 효율을 분석하기 위한 수치 모델을 제시하였다. 유한차분법을이용하여 저장소 내 1차원 비정상 열전달 해석을 수행하였으며, 반복적인 주입과 토출에 따른 충전층의 온도분포와 외부로의 손실 에너지를 계산하였다. 해석모델은 AA-CAES(advanced adiabatic compressed air energy storage)와 연계된 고온의 열에너지저장시스템으로 저장소가 지하암반 내에 위치하는 경우와 지상에 위치하는경우를 모사하고, 성능효율 및 열손실률을 비교 분석하였다.
Abstract
A packed bed thermal energy storage (TES) consisting of solid storage medium of rock or concrete through which the heat transfer fluid is circulated is considered as an attractive alternative for high temperature sensible heat storage, because of the economical viability and chemical stability of storage medium and the simplicity of operation. This study introduces the technologies of packed bed thermal energy storage, and presents a numerical model to analyze the thermal energy balance and the performance efficiency of the storage system. In this model,one dimensional transient heat transfer problem in the storage tank is solved using finite difference method, and temperature distribution in a storage tank and thermal energy loss from the tank wall can be calculated during the repeated thermal charging and discharging modes. In this study, a high temperature thermal energy storage connected with AA-CAES (advanced adiabatic compressed air energy storage) was modeled and analyzed for the temperature and the energy balance in the storage tank. Rock cavern type TES and above-ground type TES were both simulated and their results were compared in terms of the discharging efficiency and heat loss ratio.
참고문헌 (29)
- Alkilani, M. M., "Review of solar air collectors with thermal storage units", Renewable and Sustainable Energy Reviews, 15, pp.1476~1490 (2011)
- Anderson, J.D.J., "Computational Fluid Dynamics" (1995), McGraw-Hill
- Beek, J., "Design of packed catalytic reactors", Advances in Chemical Engineering, 3, pp.203~271 (1962)
- Bergman, T, L., "Fundamentals of Heat and Mass Transfer", pp.605~ (2011), Wiley
- Brosseau, D., "Testing of thermocline filler materials and molten-salt heat transfer fluids for thermal energy storage systems in parabolic trough power plants", J. Sol. Energy Eng., 127, pp.109~116 (2005)
- Coutier, J. P., "Two applications of a numerical approach of heat transfer process within rock beds", Solar Energy, 29, pp.451~462 (1982)
- Crandall, D. M., "Segmented thermal storage", Solar Energy, 77, pp.435~440 (2004)
- Hesari, F., "Behavior of packed bed thermal storage", International Journal of Enginnering, Trans. A: Basics, 16, pp.181~192 (2004)
- Gabbrielli, R., "Optimal design of a molten salt thermal storage tank for parabolic trough solar power plants", Journal of solar energy engineering, 131, pp.041001~ (2009)
- Ismail, K., "A parametric study on possible fixed bed models for PCM and sensible heat storage", Applied Thermal Engineering, 19, pp.757~788 (1999)
- Hänchen, M., "High-temperature thermal storage using a packed bed of rocks–heat transfer analysis and experimental validation", Applied Thermal Engineering, 31, pp.1798~1806 (2011)
- Kim, Y. -M., "Potential and evolution of compressed air energy storage: energy and exergy analyses", Entropy, 14, pp.1501~1521 (2012)
- "Climatological Normals of Korea (1981~2010)" (2011)[URL]
- "Statistical Analysis of Climate on August and Summer Season (June~August)" (2012)[URL]
- "Data Analysis of Climate on February and Winter Season (June~August)" (2013)[URL]
- "Kepco in Brief (Second Half of Year in 2012)" (2013)[URL]
- Mawire, A., "Simulated performance of storage materials for pebble bed thermal energy storage (TES) systems", Applied Energy, 86, pp.1246~1252 (2009)
- Michels, H., "Cascaded latent heat storage for parabolic trough solar power plants", Solar Energy, 81(6), pp.829~837 (2007)
- Li, P., "Similarity and generalized analysis of efficiencies of thermal energy storage systems", Renewable Energy, 39, pp.388~402 (2012)
- "ADELE–Adiabatic compressed-air energy storage for electricity Supply" (2011)[URL]
- Schumann, T. E., "heat transfer: a liquid flowing through a porous prism", Journal of the Franklin Institute, 208, pp.405~416 (1929)
- Singh, H., "A review on packed bed solar energy storage systems", Renewable and Sustainable Energy Reviews, 14, pp.1059~1069 (2010)
- Swedish rock technique: Lyckebo seasonal energy storage plant, "SKANSKA", SKANSKA, ~ (1983)
- Stephan, K., "The thermal conductivity of fluid air", J. Phys. Chem. Ref. Data, 14(1), pp.227~234 (1985)
- Tsotsas, E., "Heat transfer in paced beds with fluid flow: Remarks on the meaning and the calculation of a heat transfer coefficient at the wall", Chemical Engineering Britain, 45(4), pp.819~837 (1990)
- Xu, C., "Sensitivity analysis of the numerical study on the thermal performance of a packed-bed molten salt thermocline thermal storage system", Applied Energy, 92, pp.65~75 (2012)
- Zanganeh, G., "Packed-bed thermal storage for concentrated solar power–Pilot-scale demonstration and industrial-scale design", Solar Energy, 86, pp.3084~3098 (2012)
- Zbogar, A., "Heat transfer in ash deposits: A modelling tool-box", Progress in energy and combustion science, 31, pp.371~421 (2005)
- Zunft, S., "Adiabatic compressed air energy storage for the grid integration of wind power", Sixth International Workshop on Large-Scale Integration of Wind Power and Transmission Networks for Offshore Windfarms, pp.26~28 (2006)