文献类型：期刊文献

英文题名：Optimization of a concentrated photovoltaic/thermal system under non-uniform radiation using a hybrid gradient metal-foam/phase change material composite

作者：Zeng, Liteng[1];Wu, Manqiao[2];Wang, Ning[3];Li, Bo[4]

机构：[1]Shanghai DianJi Univ, Sch Elect Engn, Shanghai 201306, Peoples R China;[2]China Acad Launch Vehicle Technol, Sci & Technol Space Phys Lab, Beijing 100076, Peoples R China;[3]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[4]Beijing Inst Technol, Sch Mech Engn, Beijing 100081, Peoples R China

年份：2026

卷号：298

外文期刊名：APPLIED THERMAL ENGINEERING

收录：;EI(收录号：20261520494515);WOS:【SCI-EXPANDED(收录号:WOS:001745131000001)】；

语种：英文

外文关键词：Concentrated photovoltaic/thermal; Non-uniform radiation; Gradient metal foam; Phase change material; Temperature uniformitu

摘要：To address the limited phase-change heat transfer and uneven temperature distribution in concentrated photovoltaic-phase change material (CPV-PCM) systems, this study presents a numerical investigation of metal foam enhanced PCM systems with gradient structural configurations, focusing on the spatial distribution of metal foam. The effects of uniform metal foam were first analyzed under various concentration ratios. Subsequently, comparisons were made among uniform, horizontally graded, and vertically graded metal foam configurations, revealing the mechanism by which gradient foam metal distribution synergizes thermal conduction and natural convection. The results indicate that uniform metal foam effectively enhances heat conduction and accelerates PCM melting, although it slightly restricts liquid PCM flow in the late melting stages, with the melting rate increasing by up to 27.82% at a concentration ratio of 4. Horizontally graded metal foam improves PV panel electrical efficiency by 3.53%. In contrast, vertically graded foam metal achieves effective synergy between conduction and natural convection by enhancing heat transfer near the PV panel while reducing flow resistance in the upper region, leading to a maximum improvement of PV cell temperature uniformity by 83.53%. These findings demonstrate that designing a vertically graded pore structure in metal foam is an effective approach to enhancing the overall thermal and electrical performance of CPV-PCM systems.