压缩空气储能盐穴储气库注采全过程热力学特性分析
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摘要
压缩空气储能是解决风电、光伏等波动性可再生能源消纳问题的有效手段之一。盐穴作为压缩空气储气库具有独特的技术和经济优势。研究压缩空气盐穴储气库的热力特性,对于压缩空气储能系统的设计和运行都具有重要的指导意义。本文对盐穴储气库的压缩空气注采全过程开展了数值模拟和热力特性分析。分析结果表明:由于盐穴储气库内的空气和该储气库壁面上的盐岩层存在对流换热,因此充、放气过程中盐穴储气库内平均温度的变化程度均小于绝热模型,充气过程中,盐穴储气库内空气的平均温升为6.1℃,放气过程中,盐穴储气库内空气的平均温降为7.2℃;充、放气过程中,盐穴储气库壁面上盐岩层内热影响区的深度为2.5 m,这不会对盐穴储气库的安全运行产生不良影响。
Compressed air energy storage(CAES), as one of large-scale, clean and high-efficiency energy storage technologies, is effective for promoting the consumption of intermittent renewable energy such as wind and solar. Salt cavern air storage(SCAS) has economic and technical advantages using in compressed air energy storage system(CAES). The research of the thermodynamics characteristics of SCAS has great significance on the design and operation of CAES system. In this paper, a numerical simulation and thermodynamics analysis of a brine pit, which is adopted in a compressed air energy storage project, is presented by using the software of COMSOL Multiphysics. Comparing with the adiabatic model, the average temperature difference in charge process and discharge process is small owing to the heat transfer between air and salt rock. The average temperature increment in charge process is 6.1 ℃ and the average temperature decrement in discharge process is 7.2 ℃. The heat affected zone of salt rock is about 2.5 m, so the interaction of salt caverns could be ignored when analyze the thermodynamics of caverns.
Compressed air energy storage(CAES), as one of large-scale, clean and high-efficiency energy storage technologies, is effective for promoting the consumption of intermittent renewable energy such as wind and solar. Salt cavern air storage(SCAS) has economic and technical advantages using in compressed air energy storage system(CAES). The research of the thermodynamics characteristics of SCAS has great significance on the design and operation of CAES system. In this paper, a numerical simulation and thermodynamics analysis of a brine pit, which is adopted in a compressed air energy storage project, is presented by using the software of COMSOL Multiphysics. Comparing with the adiabatic model, the average temperature difference in charge process and discharge process is small owing to the heat transfer between air and salt rock. The average temperature increment in charge process is 6.1 ℃ and the average temperature decrement in discharge process is 7.2 ℃. The heat affected zone of salt rock is about 2.5 m, so the interaction of salt caverns could be ignored when analyze the thermodynamics of caverns.
引文
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[4] Mei S W, Wang J J, Fang T, et al. Design and engineering implementation of non-supplementary fired compressed air energy storage system:TICC-500[J].Science China Technological Sciences,2015,58(4):600-611.
[5] Inage S I. Prospects for large-scale energy storage in decarbonized power grids[J].International Energy Agency Iea,2009.
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[7] Crotogino F, Mohmeyer K U, Scharf R.Huntorf CAES:More than 20 years of successful operation[A].Spring 2001Meeting[C].Orlando:Solution Mining Research Institute,2001.1-6.
[8] Thomas F Barron.Regulatory, technical pressures prompt more US salt-cavern gas storage[J].Petroleum Society of CIM,1995(2):169-171.
[9]郑雅丽,赵艳杰.盐穴储气库国内外发展概况[J].油气储运,2010,29(9):652-655.
[10]完颜祺琪,丁国生,赵岩,等.盐穴型地下储气库建库评价关键技术及其应用[J].天然气工业,2018(5):111-117.
[11]丁国生.盐穴地下储气库建库技术[J].天然气工业,2003,23(2):106-108.
[12]严铭卿,赵梦涛,李军,等.洞穴型地下储气库热力分析[J].煤气与热力,2015,35(2):1-7.
[13] Raju M, Khaitan S K. Modeling and simulation of compressed air storage in caverns:A case study of the Huntorf plant[J].Applied Energy,2012,89(1):474-481.
[14] Guo C, Pan L, Zhang K, et al. Comparison of compressed air energy storage process in aquifers and caverns based on the Huntorf CAES plant[J].Applied Energy,2016,181:342-356.