压缩空气储能储气装置充气过程的动态热力特性研究

To investigate the effect of State of charged air on the thermodynamic Parameters of air storage device during charging process of compressed air, the existing thermodynamic model was modified and two dimensionless numbers related to the mass change rate were cstablished on the basis of the macroscopic mass and energy equations of compressed humid air in air storage device by taking into aecount the effects of various physical properties and State Parameters related to the mass change rate in watcr phasc transition. On the basis of comparing and verifying the calculation aecuraey of the model with experimental data, the model was used to calculate the charging process of four different moisture (moisture content refers to the mass fraction of gaseous watcr in humid air, and the study ränge is 0 to 0. 03.) content of air. The results show that the inlet air moisture content of the air storage device had little effect on the pressure of humid air inside the device, but had a greater impact on temperaturc; condensation oecurred after the humid air filled into the air storage device reached the saturated State, and the combined cffcct of air convection and the increase of environmental pressure led to the evaporation of the liquid water generated, and the condensation water in the air storage device was much greater than the evaporated water; the increase in exergy in the device, which was affected by phase changc, was higher than that when it was charged with dry air for 50 minutes. Therefore, the rate of condensation and the Proportion of water in different phases in the air storage device can bc evaluated respectively aecording to the respective expressions and physical meanings of the two dimensionless numbers proposed to ultimately calculate the effect of inlet air moisture content on the exergy in the air storage device.