Performance study of spectral-splitting concentrated photovoltaic/thermal systems integrating spiral-finned tubes and graphene-enhanced phase change materials

IF 10.9 1区工程技术 Q1 ENERGY & FUELS

Energy Conversion and Management Pub Date : 2025-09-25 DOI:10.1016/j.enconman.2025.120547

ELSaeed Saad ELSihy , Mostafa M. Abd El-Samie , Esmail M.A. Mokheimer

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引用次数: 0

Abstract

Spectrally beam splitting concentrated photovoltaic/thermal (SBS-CPV/T) systems incorporating advanced cooling with finned-spiral serpentine coils embedded in phase change materials (PCMs) offer a promising strategy for maximizing solar spectrum utilization. This paper numerically presents a performance analysis of five SBS-CPV/T systems using various spiral coil configurations: smooth tube (ST), solid annular fin (SAF), perforated annular fin (PAF), solid longitudinal fin (SLF), and perforated longitudinal fin (PLF) serpentines, evaluated at different concentration ratios. The effect of adding spheroidal graphene nanoplatelets to the PCM at 1–3 vol% is then investigated for the optimal configuration. Finally, all spiral coil configurations with 3 vol% of graphene nanoplatelets are compared using various performance metrics. The SBS-CPV/T system with PLF exhibits the best overall performance across all concentration ratios. As this parameter increases from 5 to 20, the merit function decreases by 38.19 % (ST), 46.7 % (SAF), 46.9 % (PAF), 47.18 % (SLF), and 47.6 % (PLF). At concentration ratio of 20, adding 3 vol% of graphene nanoplatelets to the best design boosts the merit function, electrical efficiency, overall thermal efficiency, total primary efficiency, and overall exergy efficiency by 22.2 %, 9.3 %, 57 %, 30.9 %, and 12.3 %, respectively, while reducing cell temperature by 17 °C compared to the pure PCM.

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集成螺旋翅片管和石墨烯增强相变材料的分光聚光光伏/热系统性能研究

将先进的冷却技术与嵌入相变材料（PCMs）中的鳍状螺旋蛇形线圈相结合的光谱分束聚光光伏/热（SBS-CPV/T）系统为最大限度地利用太阳光谱提供了一种有前途的策略。本文对5种不同螺旋线圈结构的SBS-CPV/T系统的性能进行了数值分析：光滑管（ST）、固体环形鳍（SAF）、穿孔环形鳍（PAF）、固体纵向鳍（SLF）和穿孔纵向鳍（PLF）蛇形，并在不同浓度比下进行了评估。然后研究了在PCM中添加1-3 vol%的球形石墨烯纳米片的效果，以获得最佳配置。最后，使用各种性能指标比较了含有3 vol%石墨烯纳米片的所有螺旋线圈结构。具有PLF的SBS-CPV/T系统在所有浓度比下均表现出最佳的综合性能。当该参数从5增加到20时，优点函数降低了38.19% （ST）、46.7% （SAF）、46.9% （PAF）、47.18% （SLF）和47.6% （PLF）。在浓度比为20的情况下，在最佳设计中添加3 vol%的石墨烯纳米片，可使性能函数、电效率、总热效率、总一次效率和总火用效率分别提高22.2%、9.3%、57%、30.9%和12.3%，同时与纯PCM相比，电池温度降低17°C。

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

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.