基于火电站转型储能电站的超高温热泵及熔盐储换热系统工程应用设计

Engineering Application Design of Ultra-high Temperature Heat Pump and Molten Salt Heat Storage and Exchange System Based on the Rmal Power Station Transformation to Energy Storage Power Station

基于300MW等级亚临界参数燃煤电站向储能电站转型的应用场景,搭建了超高温热泵及熔盐储换热系统,并系统性研究了循环压力区间和低温热源温度对超高温热泵制热COP的影响。本系统在550℃制热温度下获得了1.2623的制热效率,通过规划电站运行模式设计,最终实现可再生能源冗余发电的“电-热-电”系统循环转化效率可达到57.162%。

Based on the application scenario of 300MW subcritical parameter coal-fired power station transitioning to energy storage power station,the author built an ultra-high temperature heat pump and molten salt heat storage and exchange system,and systematically studied the effect of cycle pressure range and low temperature heat source temperature on the COP of ultra-high temperature heat pump heating.The system achieves a heating efficiency of 1.2623 at a heating temperature of 550℃.Through planning the operation mode design of the power station,the cycle conversion efficiency of the"electricity-heat-electricity"system of redundant power generation of renewable energy can reach 57.162%.