基于盐穴的压缩空气储能充放气过程仿真研究

doi:10.3969/j.issn.2097-0706.2024.10.010

摘要/Abstract

摘要：

为了定量分析地下盐穴储气库在充放气过程中的热力学行为，构建盐穴充放气热力学模型并进行仿真计算，系统分析盐穴储气系统在整个“充气—储气—放气—储气”连续过程内的动态变化。结果显示，在时间维度上，盐穴内部的气体压力和温度表现出“升—降—降—升”的规律性变化；在空间维度上，由于重力效应，盐穴内部的压力从上至下逐渐增大，而盐穴内部温度分布则因自然对流呈上高下低的分布特点。此外，若首次静置储气后未及时进行放气操作，系统将持续损失能量，进而对能量存储产生负面影响，并且随着长时间的静置储气，盐穴内压缩空气的温度最终降低至未充气前的初始温度。

关键词: 压缩空气储能, 盐穴, 充放气过程, 热力学模型, 仿真计算

Abstract:

In order to quantitatively analyse the thermodynamic behaviour of underground salt cavern gas storage during charging and discharging process， a thermodynamic model of salt cavern charging and discharging was constructed and simulation calculations were conducted. A comprehensive analysis was performed on the dynamic changes of salt cavern gas storage system throughout the continuous process of "charging-storage-discharging-storage". The results showed that， the gas pressure and temperature inside the salt cavern exhibited a regular pattern of "rise-fall-fall-rise"over time. In the spatial dimension， the pressure inside the salt cavern gradually increased from top to bottom due to the gravity effect， while the temperature inside the cavern showed a decreases pattern from the top to the bottom due to natural convection. In addition， if the system was not discharged promptly after the initial static gas storage period， the system would continuously lose energy，negatively impacting energy storage. Moreover，as the static gas storage period extended，the temperature of the compressed air inside the salt cavern dropped to the initial temperature before charging.

Key words: compressed air energy storage, salt cavern, charging and discharging process, thermodynamic model, simulation calculation

中图分类号:

TK02

郝宁, 李振亚, 王宇轩, 边文杰. 基于盐穴的压缩空气储能充放气过程仿真研究[J]. 综合智慧能源, 2024, 46(10): 73-81.

HAO Ning, LI Zhenya, WANG Yuxuan, BIAN Wenjie. Simulation research of charging and discharging processes of compressed air storage based on salt caverns[J]. Integrated Intelligent Energy, 2024, 46(10): 73-81.

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材料	密度ρ/ (kg·m^-3)	导热系数k/ [W·(J·K)^-1]	比定压热容c_p/ [J·(kg·K)^-1]	黏度μ/(10^-5Pa·s)
盐岩	2 700	3.000 0	900.00
空气	理想气体	0.024 2	1 006.43	1.789