基于Ebsilon的槽式光热发电回热循环性能分析

Performance analysis of regeneration cycle of trough CSP based on Ebsilon

在热力发电过程中,存在发电功率低、发电成本高以及工业余热直接被释放到外界等诸多能源浪费问题。为了优化热力发电系统,采用回热循环、选取最佳回热系数提高系统的整体效率。依据工程热力学的第一、二定律等数学理论建立数学模型。通过Ebsilon软件平台建立了一个典型的槽式太阳能光热发电回热系统仿真模型,通过设定特定的参数进行模拟。结果表明:随着回热系数的增加,发电量逐步增大;储热系统良好的调节作用使发电量稳定、安全、具有持续性,夜晚期间发电量稳定在1600.43 W左右、系统的光热转换效率在12.77%左右。该仿真研究为工业应用提供相应的依据,有利于促进槽式太阳能热发电回热循环系统的研究及工程化应用。

The thermal power generation process normally has low power generation efficiency, high power generation cost, and industrial waste heat is directly released to the ambient. In order to optimize the thermal power generation system, regenerative cycle and optimal recycling coefficient are adopted to improve the overall efficiency of the system. A mathematical model is established according to the First Law and Second Law of Thermodynamics and other mathematical theories. Ebsilon software platform is used to establish a typical simulation model of the solar photovoltaic power generation and recycling system. Specific parameters are set for simulation. The results show that the generating capacity increases with the increase of the recycling coefficient. A good regulating effect of the heat storage system is stable, safe and sustainable electricity generation, which is stable at about 1 600.43 W during night, and the trough solar thermal conversion efficiency of the system is about 12.77%. The simulation study providesbasis for industrial application, which is helpful to promote the research and engineering application of trough solar thermal power generation recycling system.