液压与气动Issue(12)：1-8,8.DOI:10.11832/j.issn.1000-4858.2017.12.001
用于压缩空气储能的微米级水雾冷却等温压缩实验研究
Experimental Research on Micron-sized Water Spray Cooled Quasi-isothermal Compression for Compressed Air Energy Storage
摘要
Abstract
Compressed air energy storage (CAES) is an effective large-scale energy storage technology.It is expected to be used in an urban area based on the time-dependent electricity price.In China,companies start to apply the battery to store the electricity when the price goes down and generate the electricity when the price goes up.Compared with the battery,CAES has a large capacity (100 MWh,battery ＜ 10 MWh),an environmental protection (no heavy metal pollution),and a long lifetime.One of the important factors restricting its application is the poor (＜60％) energy storage efficiency (electricity to electricity).Now,most of the CAES systems are based on the adiabatic compression.About half of the electricity is transformed into heat and exhausted.The poor heat transfer causes that more heat generates in the compression process.Many studies focus on enhancing the heat transfer to achieve the quasi-isothermal compression.In this study,we inject the micron-size (10 ～ 100 μm) water spray into the compressed air to absorb the generated heat from air.The contact heat exchange happens between the water spray and air in the compression process to keep the temperature of air in a low level.The characteristics of the pressure,volume and temperature are analyzed.Compared to the adiabatic compression,the temperature of air is largely reduced by the water spray.For a compression chamber of 0.94 L,when the compression ratio is 2,the compression power is declined from 177.9 J/cycle (adiabatic) to 121.2 J/cycle with the spray injection 0.416 g/cycle.The compression efficiency is improved from 61.6％ (adiabatic) to 88.7％.关键词
喷雾/冷却/等温压缩/传热/压缩空气储能Key words
water spray/cooling/isothermal compression/heat transfer/compressed air energy storage分类
机械制造引用本文复制引用
许未晴,贾冠伟,年炫炜,蔡茂林..用于压缩空气储能的微米级水雾冷却等温压缩实验研究[J].液压与气动,2017,(12):1-8,8.基金项目
国家自然科学基金(51375028,51605013) （51375028,51605013）
