压缩空气储能储气装置充气过程的动态热力特性研究  

Thermodynamic Characteristics of Air Storage Device During Charging Process

作　　者：武书弘 邹瀚森 姚尔人 席光[1] WU Shuhong;ZOU Hansen;YAO Erren;XI Guang(School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安交通大学能源与动力工程学院,西安710049

出　　处：《西安交通大学学报》2025年第2期41-49,共9页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金资助项目(52306050,52130603);中央高校基本科研业务费专项资金资助项目(XYZ012024030)。

摘　　要：为了探究储气装置充气气体状态对压缩空气储能过程中热力学参量的影响规律,在储气装置内压缩湿空气的宏观质量和能量方程基础上,考虑水发生相变时与质量变化速率相关的多种物性和状态参数的影响,对现有的热力学模型进行修正,并建立与相变速率有关的两个无量纲数。在对比验证模型计算准确性的基础上,计算了4种储气装置入口水蒸气质量分数,即含水量不同的充气过程。研究结果表明:在水蒸气质量分数为0~0.03时,储气装置入口气体含水量对储气装置内湿空气的压力影响不大,但是对于温度的影响较大;储气装置充入的湿空气达到饱和状态后发生冷凝现象,而空气对流和环境压力升高的综合作用导致产生的液态水蒸发,储气装置内冷凝水量远大于蒸发水量;由于相变会影响储气装置内(火用)值的增加量,这使得储气装置内(火用)的增加量在充气50 min时高于充入干空气的工况。因此,可根据所提的两个无量纲数表达式及物理意义,分别评估冷凝的速率和储气装置内不同相态水的占比,最终计算入口气体含水量对储气装置内(火用)的影响。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 established on the basis of the macroscopic mass and energy equations of compressed humid air in air storage device by taking into account the effects of various physical properties and state parameters related to the mass change rate in water phase transition.On the basis of comparing and verifying the calculation accuracy 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 water in humid air,and the study range 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 temperature;condensation occurred after the humid air filled into the air storage device reached the saturated state,and the combined effect 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 change,was higher than that when it was charged with dry air for 50minutes.Therefore,the rate of condensation and the proportion of water in different phases in the air storage device can be evaluated respectively according 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.

关 键 词：储气装置 湿空气 充气过程 蒸发 冷凝 

分 类 号：TK02[动力工程及工程热物理]