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.
作者
王国华
张学林
李智
李青松
韩月峰
薛小代
梅生伟
Wang Guohua;Zhang Xuelin;Li Zhi;Li Qingsong;Han Yuefeng;Xue Xiaodai;Mei Shengwei(State Key Lab of Control and Simulation of Power Systems and Generation Equipments,Department of Electrical Engineering,Tsinghua University,Beijing 100084,China;China Salt Jintan Co.,Ltd,Changzhou 213200,China;Hebei Electric Power Design & Research Institute Co.,Ltd,Shijiazhuang 221116,China;Tus-New Energy College,Qinghai University,Xining 810016,China)
出处
《可再生能源》
CAS
北大核心
2019年第4期618-624,共7页
Renewable Energy Resources
基金
青海省科技成果转化专项(2017-GX-101)
青海省自然科学基金(2017-ZJ-932Q)
中国盐业总公司科技资助项目(2017000855)
国家自然科学基金创新研究群体科学基金资助项目(51621065)
关键词
压缩空气储能
盐穴储气库
数值模拟
热力分析
compressed air energy storage
salt cavern air storage
numerical simulation
thermodynamics analysis
