Abstract Gas-phase solar receivers can operate over a wider temperature range than receivers which use conventional liquid heat transfer media. However, due to their relatively poor heat transfer performance, gas-phase receivers require substantially more heat transfer area and/or higher flow rates to extract the same amount of heat which leads to more complicated designs (e.g. a porous-media absorber with small feature/pore size) and decreased reliability (e.g. internal temperature gradients and higher thermal stresses). Detailed numerical modelling techniques can help elucidate the fundamental heat and mass transfer mechanisms/interactions in such to help mitigate these risks and to create innovative, high-performance, designs. To collate the research efforts towards gas-phase receiver modelling, this paper systematically reviews—and critically compares—the latest numerical studies of various high-temperature gas-phase receiver designs. It was found that, from a numerical point of view, gas-phase receivers can be categorised by whether they contain a porous medium or not. This categorisation is crucial, because it dictates the numerical techniques needed to capture the underlying phenomena. It was also found that no standardised performance metrics are reported for gas-phase receivers. This study suggests that a holistic figure of merit, such as the one developed by Lenert et al. (2012), be adopted in this field to merge all performance criteria for comparative evaluation. Overall, the present review is expected to serve as a guide for the development/enhancement of receiver designs based on linking best practices in simulation/modelling with the key features and limitations of gas-phase receivers.

中文翻译：

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高温大气和加压气相太阳能接收器的设计：对数值建模和性能参数的综合回顾

摘要 气相太阳能接收器可以在比使用传统液体传热介质的接收器更宽的温度范围内工作。然而，由于它们的传热性能相对较差，气相接收器需要更多的传热面积和/或更高的流速来提取相同数量的热量，这导致设计更复杂（例如，具有小特征的多孔介质吸收器） /孔径）和降低的可靠性（例如内部温度梯度和更高的热应力）。详细的数值建模技术可以帮助阐明基本的传热和传质机制/相互作用，以帮助减轻这些风险并创建创新的高性能设计。为了整理气相接收器建模的研究工作，本文系统地回顾并批判性地比较了各种高温气相接收器设计的最新数值研究。结果发现，从数值的角度来看，气相接收器可以根据它们是否包含多孔介质进行分类。这种分类至关重要，因为它决定了捕捉潜在现象所需的数值技术。还发现没有报告气相接收器的标准化性能指标。这项研究表明，整体的品质因数，例如 Lenert 等人开发的品质因数。（2012），在该领域采用合并所有性能标准进行比较评估。全面的，