Numerical investigation of CPVT-LFR Fresnel reflector system under real weather conditions

IF 9.9 1区工程技术 Q1 ENERGY & FUELS

Energy Conversion and Management Pub Date : 2025-04-24 DOI:10.1016/j.enconman.2025.119829

Taoufik Brahim , Abdelmajid Jemni

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Abstract

This study presents a numerical investigation of a Concentrating Photovoltaic Thermal Linear Fresnel Reflector (CPVT-LFR) system using air and water as cooling working fluids under real Tunisian weather conditions. A quasi-transient mathematical model was developed to predict temperature distributions across all material layers of the reflector system and evaluate its thermal and electrical performance. A parametric analysis was conducted to optimize solar energy utilization. Results indicate that the air-cooled system achieves an average overall efficiency of 78.67%, which is 58.73% higher than the water-cooled system (32.46%). While the air system exhibits superior thermal performance producing 11.9 times more annual thermal energy than the water system the water system generates 1.37 times more electrical power. Additionally, distinct optimal mass flow rates were identified for maximizing either electrical or thermal efficiency. This study demonstrates the potential of CPVT-LFR systems in enhancing solar energy conversion efficiency and provides insights into designing systems tailored to specific applications.

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真实天气条件下CPVT-LFR菲涅耳反射系统的数值研究

本研究提出了集中光伏热线性菲涅耳反射器（CPVT-LFR）系统的数值研究，在突尼斯的实际天气条件下，使用空气和水作为冷却工作流体。建立了准瞬态数学模型来预测反射器系统所有材料层的温度分布，并评估其热学和电学性能。为优化太阳能利用，进行了参数分析。结果表明，风冷系统的平均总效率为78.67%，比水冷系统（32.46%）高58.73%。空气系统表现出优越的热性能，每年产生的热能是水系统的11.9倍，而水系统产生的电力是水系统的1.37倍。此外，确定了不同的最佳质量流量，以最大限度地提高电效率或热效率。这项研究证明了CPVT-LFR系统在提高太阳能转换效率方面的潜力，并为设计适合特定应用的系统提供了见解。

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来源期刊

Energy Conversion and Management 工程技术-力学

CiteScore

19.00

自引率

11.50%

发文量

1304

审稿时长

17 days

期刊介绍： The journal Energy Conversion and Management provides a forum for publishing original contributions and comprehensive technical review articles of interdisciplinary and original research on all important energy topics. The topics considered include energy generation, utilization, conversion, storage, transmission, conservation, management and sustainability. These topics typically involve various types of energy such as mechanical, thermal, nuclear, chemical, electromagnetic, magnetic and electric. These energy types cover all known energy resources, including renewable resources (e.g., solar, bio, hydro, wind, geothermal and ocean energy), fossil fuels and nuclear resources.