Enhancing the performance of water-based PVT collectors with nano-PCM and twisted absorber tubes

IF 2.4 Q3 ENERGY & FUELS
Anwer B. Al-Aasama, A. Ibrahim, U. Syafiq, K. Sopian, Bassam M. Abdulsahib, Mojtaba Dayer
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Abstract

The study investigated the thermal performance of a photovoltaic thermal (PVT) collector with a twisted absorber tube and nanoparticle-enhanced phase change material (nano-PCM). The PVT collector consisted of twisted absorber tubes, a container filled with nano-PCM, and a photovoltaic (PV) panel. To assess its efficiency, five different configurations were tested using an indoor solar simulator. The configurations analyzed were as follows: (a) an unenhanced PV panel, (b) PVT with circular absorber tubes (C-PVT), (c) PVT with twisted absorber tubes (T-PVT), (d) C-PVT with nano-PCM (C-PVT-PCM), and (e) T-PVT with nano-PCM (T-PVT-PCM). The thermal, photovoltaic, and combined photovoltaic-thermal efficiencies were evaluated at varying mass flow rates (0.008-0.04kg/s) and a constant solar irradiance of 800W/m2. Among the configurations tested, the T-PVT-PCM configuration demonstrated the highest performance. Specifically, at a mass flow rate of 0.04kg/s, solar irradiance of 800W/m2, and an ambient temperature of 27°C, it achieved photovoltaic, thermal, and combined photovoltaic-thermal efficiencies of 9.46%, 79.40%, and 88.86%, respectively. The utilization of twisted absorber tubes in the design notably improved thermal efficiency by enhancing heat transmission between the liquid and the tube surface. Furthermore, the implementation of T-PVT-PCM led to a significant reduction in surface temperature. Compared to the unenhanced PV panel, it lowered the surface temperature by approximately 30°C, and when compared to C-PVT-PCM, it reduced it by around 10°C. Notably, T-PVT-PCM outperformed the unenhanced PV panel by exhibiting a 34.5% higher photovoltaic efficiency. Overall, the study highlights the performance of the PVT collector with twisted absorber tubes and nanoparticle-enhanced phase change material. The innovative design achieved remarkable thermal efficiency, reduced surface temperatures, and significantly enhanced photovoltaic efficiency compared to traditional configurations. These findings contribute to the development of more efficient and versatile solar energy systems with the potential for broader applications in renewable energy technology.
使用纳米PCM和扭曲吸收管提高水性PVT收集器的性能
研究了具有扭曲吸收管和纳米颗粒增强相变材料的光伏热(PVT)集热器的热性能。PVT集热器由扭曲吸收管、填充纳米pcm的容器和光伏板组成。为了评估其效率,使用室内太阳能模拟器测试了五种不同的配置。分析的结构如下:(a)无增强PV板,(b)带圆形吸收管的PVT (c -PVT), (c)带扭曲吸收管的PVT (T-PVT), (d)带纳米pcm的c -PVT (c -PVT- pcm), (e)带纳米pcm的T-PVT (T-PVT- pcm)。在不同的质量流量(0.008-0.04kg/s)和800W/m2的恒定太阳辐照度下,对热效率、光伏效率和光伏热效率进行了评估。在测试的配置中,T-PVT-PCM配置表现出最高的性能。其中,在质量流量为0.04kg/s、太阳辐照度为800W/m2、环境温度为27℃的条件下,光伏效率、热效率和光电热效率分别为9.46%、79.40%和88.86%。在设计中采用扭转吸收管,通过加强液体与吸收管表面之间的传热,显著提高了热效率。此外,T-PVT-PCM的实施显著降低了表面温度。与未增强的PV面板相比,它降低了大约30°C的表面温度,与C- pvt - pcm相比,它降低了大约10°C。值得注意的是,T-PVT-PCM比未增强的光伏板高出34.5%的光伏效率。总的来说,本研究突出了扭曲吸收管和纳米颗粒增强相变材料的PVT集热器的性能。与传统配置相比,创新的设计实现了显著的热效率,降低了表面温度,并显着提高了光伏效率。这些发现有助于开发更高效和通用的太阳能系统,并有可能在可再生能源技术中得到更广泛的应用。
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
CiteScore
4.50
自引率
16.00%
发文量
83
审稿时长
8 weeks
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