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Performance Assessment of an Improved Open Volumetric Receiver Design with 240 MW_th

机译:具有240 MW_TH改进开放式容积接收器设计的性能评估

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Due to their proved robustness, good operating characteristics and the easy way to include thermal storage open volumetric receivers with air as heat transfer fluid are an interesting alternative for central receiver power plants. This alternative represents a significant step forward in plant availability and technical controllability to achieve the terminal goal of high probabilities and expectancy levels of annual electric yields representing the basis for the competitiveness and dissemination of dispatchable solar thermal systems. Though high availability has been shown in demanding transient and part load cases a permanent goal is to increase further efficiencies for future commercial scale receivers. In the current study a novel receiver design for a 240 MWth solar tower is presented which was optimised for reduced radiative losses and high air return ratios - a crucial parameter for obtaining high efficiencies of open volumetric receivers. With the help of a CFD model, which was recently specifically developed for the simulation of open volumetric receivers, the performance of the new receiver design was assessed. Under design conditions of 670°C hot air and 270°C return air temperature the receiver efficiency based on the intercept on the absorber reaches 84.3% and the air return ratio reaches 84.8%. At reduced hot air temperature of 560°C the efficiency even exceeds 90%.
机译:由于它们的探明鲁棒性,良好的操作特性和简单的方法来包括热存储开放体积的接收器与空气作为传热流体是用于中央接收机发电厂一个有趣的选择。这种替代表示植物的可用性和技术可控向前一个显著步骤,以实现高概率和表示用于分派的太阳能热系统的竞争力和传播的基础年度电产量的预期水平的终端目标。虽然高可用性已在要求苛刻的瞬态和部分负荷的情况下显示出永久的目标是增加对未来的商业规模接收机进一步提高效率。在目前的研究的新颖的接收器设计为240 MWth太阳能塔提出将其用于降低辐射损耗和高的空气返回比率优化 - 用于获得开放体积接收机的高效率的关键参数。随着CFD模型,这是最近专门为开放式容积式接收的模拟开发的帮助下,新的接收器设计的性能进行了评估。下的670℃的热空气和270℃的回流空气温度基于在吸收体上的截距接收机效率达到84.3%,而空气返回比达到84.8%设计条件。在560℃减压热风温度的效率甚至超过90%。

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