CSP(concentrated solar power)系统通过聚焦太阳光进行光热发电,主要工作介质包括导热油及熔盐.由于太阳能的不连续性,为了提供更稳定的能量输出,发展出了采用熔盐为储热工质进行蓄热的系统,该系统同时也提供了与其它能源系统耦合的可行性.该系统的熔盐回路主要由 3 个部分构成,分别为集热器、高低温储热罐和蒸汽发生器.通过对50 MW塔式太阳能的热发电系统熔盐回路的各个组件的模型进行建立,设计一套与之相应的控制系统,并针对不同工况下,各个组件及整个系统的响应进行了模拟,得出熔盐回路的瞬态响应特性.由于其熔盐回路与熔盐反应堆具有一定的相似性,本研究也可为熔盐反应堆核能综合利用中储能系统提供参考.%Concentrated solar power systems provide a high temperature heat source by concentrating solar radiation for electricity generation. To ensure a stable output, plants with molten salt-based energy storage system have been developed. This study aims to understand the dynamic response of the molten salt loop of a 50MW power plant by modelling and simulation. Such a loop includes a receiver, a hot and a cold storage tanks and a steam generator (heat exchanger). The work was done with the Modelica programming language and Dymola under different working conditions. The simulation results showed that the receiver could reach steady state in 30 s. However, it took ~5.5 hours for the storage tank to reach the steady state. The response of the heat exchanger was found to also be very quick with a steady-state reached within ~ 1500 s to reach a completely steady state.
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