AA-CAES压缩膨胀系统的运行级数优化

Optimization Design of Compression and Expansion Stages in Advanced Adiabatic Compressed Air Energy Storage System

先进绝热空气压缩储能系统(AA-CAES)由压缩机、透平机、储气室、换热器等装置组成,压缩机与透平机的级数为一级或多级,而级数存在一个最优组合,本文通过计算不同压缩膨胀级数系统的功效率与(火用)效率,得出了AA-CAES系统压缩机与透平机级数的最优组合。结果表明,AA-CAES系统的储气室压力和初始状态一定的情况下,储气室的(火用)损失只与终止压力有关;在总压比一定的情况下,压缩级数越少,在同样膨胀压力条件下,系统输出功越大;压缩级数相同时,透平级数越多,空气单位质量的输出功越多,系统的最合理的压缩级数为两级,膨胀级数为三级。

Advanced adiabatic compressed air energy storage system （AA-CAES） is composed of a compressor, turbine, gas chamber, heat exchanger and other means, the number of stages of the compressor and the turbine to one or more stages, and the progression there is an optimal combination. In this paper, the calculation of different compression and expansion series system power efficiency and exergy efficiency obtained optimal combination of AA-CAES system compressor and turbine stages. The results showed that in the AA-CAES system, the pressure of gas storage cavern, and an initial state for a certain case, the exergy loss of the gas storage cavern only related to the termination pressure; total pressure ratio under certain circumstances, fewer compression stages in the similarly expansion of the pressure conditions, the larger the system output power; Compression stages with the same turbine progression is more, the more the output power of the air unit mass, the system is the most reasonable for two compression stages, an expansion series for three.