This manuscript analyzes the suitability of a recently proposed numerical method, the First-Order Scattering Method (FOS), to describe radiation transfer in a Solar Compound Parabolic Collector Photoreactor (CPCP). The study considers five different irradiance conditions ranging from fully diffuse to fully direct solar radiation, with 90 and 45° angled rays. Three photocatalysts at different loadings were considered: Evonik P25, Graphene Oxide, and Goethite, selected due to (1) their relevance in photocatalytic applications and (2) the availability of optical transport properties in the open literature. The study shows that the method is efficient and free of statistical noise, while its accuracy is not affected by the boundary condition’s complexity. The method’s accuracy is very high for photocatalysts with low to moderate albedos, such as Goethite and Graphene Oxide, displaying Normalized Absoluted Mean Error below 3%, i.e., comparable to the Monte Carlo (MC) Method’s statistical fluctuations.

中文翻译：

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使用一阶散射法的太阳能 CPC 光反应器中的辐射传输

这份手稿分析了最近提出的数值方法一阶散射法 (FOS) 的适用性，以描述太阳能复合抛物面集电极光反应器 (CPCP) 中的辐射传输。该研究考虑了五种不同的辐照度条件，从完全漫射到完全直接的太阳辐射，具有 90° 和 45° 角的光线。考虑了三种不同负载量的光催化剂：赢创 P25、氧化石墨烯和针铁矿，之所以选择它们是因为 (1) 它们在光催化应用中的相关性和 (2) 公开文献中的光传输特性的可用性。研究表明，该方法高效且无统计噪声，其准确性不受边界条件复杂性的影响。该方法对于低到中等反照率的光催化剂的准确性非常高，