To better understand the characteristics of a large-scaled parabolic trough solar field (PTSF) under cloud passages, a novel method which combines a closed-loop thermal hydraulic model (CLTHM) and cloud vector (CV) is developed. Besides, the CLTHM is established and validated based on a pilot plant. Moreover, some key parameters which are used to characterize a typical PTSF and CV are presented for further simulation. Furthermore, two sets of results simulated by the CLTHM are compared and discussed. One set deals with cloud passages by the CV, while the other by the traditionally distributed weather stations (DWSs). Because of considering the solar irradiance distribution in a more detailed and realistically way, compared with the distributed weather station (DWS) simulation, all essential parameters, such as the total flowrate, flow distribution, outlet temperature, thermal and exergetic efficiency, and exergetic destruction tend to be more precise and smoother in the CV simulation. For example, for the runner outlet temperature, which is the most crucial parameter for a running PTSF, the maximum relative error reaches −15% in the comparison. In addition, the mechanism of thermal and hydraulic unbalance caused by cloud passages are explained based on the simulation.

中文翻译：

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云通道下大型抛物槽太阳场（PTSF）的热力和水力特性

为了更好地了解云通道下的大型抛物槽太阳场（PTSF）的特征，开发了一种结合闭环热工水力模型（CLTHM）和云矢量（CV）的新方法。此外，CLTHM是根据中试工厂建立和验证的。此外，提出了一些用于表征典型PTSF和CV的关键参数，以供进一步仿真。此外，对CLTHM模拟的两组结果进行了比较和讨论。一套通过简历处理云通道，而另一套通过传统分布的气象站（DWS）处理。由于更详细，更实际地考虑了太阳辐照度分布，因此与分布式气象站（DWS）模拟相比，所有必不可少的参数（例如总流量，流量分布，在CV模拟中，出口温度，热效率和能效以及能效破坏往往更精确，更平滑。例如，对于流道出口温度（这是运行PTSF的最关键参数），比较中的最大相对误差达到-15％。此外，还基于模拟解释了云通道引起的热力和水力不平衡的机理。