Analysis and Comparison of Dynamic Characteristics of Typical Supercritical Carbon Dioxide Cycle
Supercritical carbon dioxide(sCO2)cycle has various structures.A dynamic mathemat-ical model of the sCO2 recompression cycle and its three derivative cycles has been established in this paper to explore the impact of cycle layout on the dynamic characteristics of the system.Under the same external conditions,using the sCO2 recompression cycle layout as a reference cycle,the dynamic characteristics of the cycle net power in the four cycle layouts were emphatically compared under three different conditions:heat source mass flow disturbance,total mass flow disturbance,and load command disturbance.The results show that the modification of each part of the sCO2 recompression cycle can effectively reduce the disturbance amplitude of the cycle net power under both mass flow disturbance conditions,with the minimum disturbance amplitude decreasing to 0.8％and 26.5％,respectively;However,it also increases the response time of the cycle net power to load command,reaching a maximum of 220 s.The research results provide a theoretical reference for the dynamic characteristics analysis and control system design of the sCO2 cycle.
NETL
NSTL
万方数据
