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先进绝热压缩空气储能系统(AA-CAES)的储能设备-储气室是用来储存由压缩机压缩以后的高压空气,随着储气室内压力的变化,高压空气会与储气室壁面之间产生传热,从而影响储气的效率。本文利用实验与数值模拟的方法对储气室内的温度和压力以及换热系数对效率的影响进行研究。结果表明:储气罐充放气过程中,随着存储压力的增大,储气室内温度梯度范围越来越小,这是因为随着压力的增大,储气罐内壁面的对流换热系数降低,从而换热系数随着储气罐储气压力的增大而降低;储气罐内的储能效率随着压力的增大而增大,实验结果与数值模拟结果吻合良好。
AA-CAES energy storage device - The gas storage chamber is used to store the compressed air compressed by the compressor after the high-pressure air, with the pressure changes in the gas chamber, the high-pressure air and the gas chamber wall Heat transfer between, thus affecting the efficiency of gas storage. In this paper, experimental and numerical simulation of the gas chamber temperature and pressure and heat transfer coefficient on the efficiency of the study. The results show that with the increase of storage pressure, the range of temperature gradient in the gas storage chamber becomes smaller and smaller during the process of gas storage and evacuation. This is because as the pressure increases, the convection heat transfer on the inner wall of the gas storage tank Coefficient decreases, so the heat transfer coefficient decreases with the increase of gas storage pressure. The energy storage efficiency increases with the increase of pressure. The experimental results are in good agreement with the numerical results.