先进压缩空气储能系统的余热回收和利用

Waste Heat Recovery and Utilization of Advanced Compressed Air Energy Storage System

压缩空气储能是现阶段快速发展的一种储能技术,能够实现能量的储存和释放。在系统运行过程中,为了避免热量损耗,提出一种回收利用系统排气和换热工质余热的方法,在原余热回收系统基础上添加低膨胀比膨胀机,系统排气通过换热器吸收工质余热,进入膨胀机做功,增加膨胀机组输出功率并提升系统效率。利用Aspen Plus软件建立稳态工况下四级先进压缩空气储能系统模型,进行模拟仿真,通过改变膨胀机排气压力和稳压阀出口压力,探究二者对系统效率和输出功率的影响。仿真结果表明,该方法增加了压缩空气储能系统的总输出功率,提高了系统效率。

Compressed air energy storage is a kind of energy storage technology that has developed rapidly in recent years,which can realize energy storage and release.In order to avoid heat loss during the operation of the system,a method to recover and utilize the waste heat of the system exhaust gas and the heat exchange working fluid is proposed.On the basis of the original heat recovery system,a low expansion ratio expander is added.The converter absorbs the waste heat of the working fluid and enters the expander to do work to increase the output power of the expansion unit and improve the system efficiency.By using Aspen Plus software to establish a four-stage advanced compressed air energy storage system model under steady-state conditions for simulation.The influence of the these two factors on the system efficiency and output power is explored by changing the expander exhaust pressure and the regulator valve outlet pressure,The simulation results show that the method increases the total output power of the advanced compressed air system and improves the system efficiency.