Optimizing high-concentrator photovoltaic efficiency: Numerical study of hybrid nanofluid and porous wavy walled mini channel heat sink

IF 5 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Thermal Sciences Pub Date : 2025-06-30 DOI:10.1016/j.ijthermalsci.2025.110103

Saeed Rabiei , Raouf Khosravi , Farid Varasteh , Amin Etminan

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引用次数: 0

Abstract

This study investigates advanced thermal management for high-concentration photovoltaic (HCPV) systems through the combined use of hybrid nanofluids and wavy-walled mini-channel heat sinks. Numerical simulations of 36 configurations, examining wave amplitudes (100–300 μm), Reynolds numbers (300–500), and nanoparticle concentrations (0–0.1 %wt) under a concentration ratio of 1200 and 1000 W/m² irradiance, demonstrate significant performance improvements. The optimal configuration achieves 41.15 % electrical efficiency and 224 W power output (i.e., 26 % higher than comparable systems) while maintaining exceptionally low pumping power (i.e., 0.007 W). Integrating wavy-walled channels with porous inserts yields substantial heat transfer enhancement by disrupting the boundary layer, promoting secondary vortices, and intensifying fluid-solid thermal interactions. This combined approach boosts thermal performance while markedly lowering the required pumping power. Artificial neural networks and genetic algorithms, successfully optimize the system by balancing electrical efficiency, temperature non-uniformity, and energy consumption. These findings provide a practical framework for implementing efficient cooling solutions in high-performance HCPV applications, offering technical advancements and sustainable energy benefits.

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优化高聚光光伏效率：纳米流体和多孔波壁微型通道混合散热器的数值研究

本研究通过混合纳米流体和波壁微型通道散热器的结合使用，研究了高浓度光伏（HCPV）系统的先进热管理。在浓度比为1200和1000 W/m2辐照度的情况下，对36种配置进行了数值模拟，考察了波幅（100-300 μm）、雷诺数（300-500）和纳米颗粒浓度（0 - 0.1% wt），结果显示了显著的性能改进。最佳配置可实现41.15%的电效率和224 W的输出功率（即比同类系统高26%），同时保持极低的泵浦功率（即0.007 W）。通过破坏边界层、促进二次涡和加强流固热相互作用，将波浪壁通道与多孔插入物相结合，可以显著增强传热。这种组合方法提高了热性能，同时显著降低了所需的泵送功率。人工神经网络和遗传算法通过平衡电效率、温度不均匀性和能耗，成功地优化了系统。这些发现为在高性能HCPV应用中实施高效冷却解决方案提供了一个实用框架，提供了技术进步和可持续的能源效益。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Thermal Sciences 工程技术-工程：机械

CiteScore

8.10

自引率

11.10%

发文量

531

审稿时长

55 days

期刊介绍： The International Journal of Thermal Sciences is a journal devoted to the publication of fundamental studies on the physics of transfer processes in general, with an emphasis on thermal aspects and also applied research on various processes, energy systems and the environment. Articles are published in English and French, and are subject to peer review. The fundamental subjects considered within the scope of the journal are: * Heat and relevant mass transfer at all scales (nano, micro and macro) and in all types of material (heterogeneous, composites, biological,...) and fluid flow * Forced, natural or mixed convection in reactive or non-reactive media * Single or multi–phase fluid flow with or without phase change * Near–and far–field radiative heat transfer * Combined modes of heat transfer in complex systems (for example, plasmas, biological, geological,...) * Multiscale modelling The applied research topics include: * Heat exchangers, heat pipes, cooling processes * Transport phenomena taking place in industrial processes (chemical, food and agricultural, metallurgical, space and aeronautical, automobile industries) * Nano–and micro–technology for energy, space, biosystems and devices * Heat transport analysis in advanced systems * Impact of energy–related processes on environment, and emerging energy systems The study of thermophysical properties of materials and fluids, thermal measurement techniques, inverse methods, and the developments of experimental methods are within the scope of the International Journal of Thermal Sciences which also covers the modelling, and numerical methods applied to thermal transfer.