Choice of working gas for a pumped-thermal system integrating energy storage with wind turbines
Choice of working gas for a pumped-thermal system integrating energy storage with wind turbines
复制标题
储能与风力涡轮机集成的抽热系统工作气体的选择
DOI：
10.1049/icp.2023.1565
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Garvey S
中科院分区：
文献类型：
--
作者：
Garvey S
随着全球风电渗透率的增加，将需要大量的储能来将这种电力整合到电网中。在一些风力涡轮机内集成存储是非常有利的，因为这可以避免不必要的功率转换并降低总成本。集成这种存储的一种方法涉及使用基于气体的传输，其中主转子功率由直接驱动压缩机吸收，并且电力由一个或多个气体膨胀器驱动的发电机产生，该气体膨胀器比主转子旋转得快得多[1]。在这种布置中，能量存储和回收利用了当气体通过显著的压力比被压缩或膨胀时气体温度强烈变化的事实。有效能以冷和热的形式储存。为了实现紧凑的布置，气体压力必须很高，并且高压和低温的组合倾向于使工作气体（除了氦气）在一个点处接近液化。本文探讨了这种系统的工作气体的选择，考虑到非常非理想的行为接近液化和实现高存储效率。四种不同的候选工作气体的选择进行了比较。
As wind power penetration increases globally, extensive energy storage will be required to integrate this power within electrical grids. Integrating storage within some wind turbines is highly advantageous since this can avoid unnecessary power conversions and reduce overall cost. One approach to integrating this storage involves using a gas-based transmission where the main rotor power is absorbed by a direct-drive compressor and electricity is produced by a generator driven by one or more gas expanders spinning much faster than the main rotor [1]. In this arrangement, the energy storage and recovery exploits the fact that gas temperatures change strongly when the gas is compressed or expanded through a significant pressure ratio. Exergy is stored in the form of both coldness and heat. To achieve a compact arrangement, the gas pressures must be high and the combination of high pressures and low temperatures tends to bring the working gas (except Helium) close to liquefaction at one point. This paper examines the choice of working gas for such systems taking into consideration the very non-ideal behaviour close to liquefaction and achieving high storage efficiencies. Four different candidate working gas choices are compared.