液化空气储能系统与高温热水系统的耦合应用研究

Coupling Application of High Temperature Hot Water System with Liquid Air Energy Storage System

与传统一次能源相比,太阳能、海洋能和风能等可再生能源具有随机性和间断性的缺点,储能技术为解决电力的稳定供应发挥着重要的作用。近些年越来越受关注的液化空气储能技术兼备储能密度高和场地要求低的优点,是实现电力系统削峰填谷的一个理想解决方案。为提高液化空气储能技术的实用价值,通常利用余热回用方法提高系统的循环效率,但依靠特定外部条件的使用环境限制了该技术的推广应用。本文提出了一种与高温热水系统耦合应用的液化空气储能系统,利用压缩热和电加热器实现系统内冷热联动,既提高系统循环效率又克服了系统对外部热源的依赖,从而适应更加多样化的应用场合。

Renewable energy such as solar, ocean and wind energy etc. has the shortcomings of randomness and discontinuity compared with traditional primary energy, and energy storage technology plays an important role in stable electrical supply. Liquid air energy storage (LAES) is an ideal solution to realize peak shaving and valley filling in power system which has attracted more and more attention due to its advantages of high density and low site requirement. Though waste heat has been used to improve the round-trip efficiency of the system usually, the application is limited because of its specific external condition. A liquefied air energy storage system coupled with high temperature hot water system is proposed to fit more various occasions, not only to improve efficiency of the system but also to overcome the dependence on external heat sources.