压缩空气与热化学复合储能系统反应器动态性能研究

Aiming at the issue of unstable operation caused by the fluctuating operation of air compressor in the combined compressed air and thermochemical energy storage system, a comprehensive mathematical model of thermochemical process is established to study the effects of different operating parameters on the heat transfer characteristics of the working fluids and methanol decomposition efficiency of the reactor. The operation control strategy of the reactor is further established to achieve the efficient and stable transformation from thermal energy to chemical energy. The results show that when the reactor operates under variable working conditions, the temperature of reactant and air increases and decreases respectively along the flow direction in the reactor. The methanol decomposition efficiency is improved by increasing the flow rate of air and inlet temperature on the air side of the reactor, and is reduced by increasing the flow rate of methanol. The disturbance of inlet temperature on the air side of the reactor has the greatest effect on the variation range of the methanol decomposition efficiency, while the reactor has the fastest response to the variation of the flow rate of methanol. Subsequently, by establishing the feedforward-feedback control strategy to regulate the flow rate of working fluid at the inlet of both reactor and air compressor, the methanol decomposition efficiency of reactor could achieve 95% within 1 000 seconds under the air compressor input load of 85% 110%, which proves the fast response and effectiveness of the proposed control strategy.