基于气液溶解与气体压缩复合原理的高能量密度液压储能方法  

High Energy Density Hydraulic Energy Storage Method Based on Composite Principle of Gas Liquid Dissolution and Gas Compression

作　　者：王伟平 周心怡 陆顺 WANG Weiping;ZHOU Xinyi;LU Shun(School of Mechanical Engineering,Jiangsu Normal University,Xuzhou,Jiangsu,221116)

机构地区：[1]江苏师范大学机电学院,徐州221116

出　　处：《中国机械工程》2025年第3期426-434,443,共10页China Mechanical Engineering

基　　金：国家科技支撑计划(2015BAF07B06);徐州市科技计划(KC23005);江苏省高等学校基础科学(自然科学)研究面上项目(23KJB460013)。

摘　　要：为了解决传统液压蓄能器的低能量密度问题,提出了一种基于气液溶解与气体压缩复合原理的高能量密度液压储能方法,该方法通过向液压蓄能器的气体部分添加定量液体溶剂从而使储能过程兼具气体压缩和气液溶解功能。通过气液溶解,一部分能量以液相内能的形式储存,减小了气体内能的增幅。推导了复合储能方法的能量密度表达式并进行了对比分析,建立了气体多变指数与气体压缩速率等因素的数值关系,选择二氧化碳和水的组合作为储能介质进行了模拟和实验验证。仿真和实验结果表明,在气体预充压力5 MPa、储能时间5 s、注水量1 L的情况下,能量密度提高率达到9%。To address the issues of low energy density in traditional hydraulic accumulators,a high-energy-density hydraulic energy storage method was proposed based on the combined principle of gas-liquid dissolution and gas compression.This method involved adding a quantitative amount of liquid solvent to the gas section of the hydraulic accumulator,enabling the energy storage processes to encompass both of gas compression and gas-liquid dissolution.Through gas-liquid dissolution,a portion of the energy was stored in the form of internal energy within the liquid phase,thereby reducing the increase in internal energy of the gas.The energy density expression for the composite energy storage method was derived and comparatively analyzed.Numerical relationship between the gas polytropic index and factors such as gas compression rate was established.Finally,a combination of carbon dioxide and water was selected as the energy storage medium for simulation and experimental validation.Both of simulation and experimental results indicate that,under conditions of a pre-charged gas pressure of 5 MPa,an energy storage duration of 5 s,and a water injection volume of 1 L,the energy density improvement rate reaches 9%.

关 键 词：高能量密度 气液溶解 液压蓄能器 液压储能 

分 类 号：TH137[机械工程—机械制造及自动化]