Enhancing the Performance of Photovoltaic Thermal Solar Collectors using Twisted Absorber Tubes and Nanofluids with Optimal Design Parameters

IF 1 Q4 ENERGY & FUELS International Journal of Renewable Energy Research Pub Date : 2023-01-01 DOI:10.20508/ijrer.v13i3.14163.g8799

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引用次数: 1

Abstract

A Photovoltaic-Thermal-Solar-Collector (PVT) is a technology that combines the benefits of photovoltaic panels (PV) and solar-thermal-collectors. It can enhance the efficiency of PV by reducing its surface temperature while producing hot water. The PVT's photovoltaic, thermal, and combined-photovoltaic-thermal efficiencies with parallel twisted absorber tubes and nanofluids as working fluids have been determined. A total of 11 parallel twisted absorber riser tubes with headers were used. The optimum header tube diameter was 51mm using Computational-Fluid-Dynamics (CFD) simulations. The utilization of twisted tubes significantly improved the photovoltaic, thermal, and combined-photovoltaic-thermal efficiencies, with the combined-photovoltaic-thermal efficiency rising from 61.2% to 84.6% at a mass-flow-rate of 0.04kg/s and solar-irradiance-level of 800W/m 2 . The effect of employing nanofluids on the PVT system was investigated, with nanofluids contributing to even greater gains in combined photovoltaic-thermal efficiency, which increased from 84.6% to 88.2%. These findings provide valuable insights into the design of high-performance fluid-based PVT systems, highlighting the potential of twisted tubes and nanofluids for enhancing system efficiency.

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利用扭曲吸收管和纳米流体优化设计参数提高光伏太阳能集热器性能

光伏-热-太阳能集热器(PVT)是一种结合了光伏板(PV)和太阳能-热集热器优点的技术。在产生热水的同时，可以通过降低表面温度来提高PV的效率。在并联扭曲吸收管和纳米流体作为工作流体的情况下，PVT的光伏效率、热效率和光伏热效率组合已经被确定。共使用了11根带接头的平行扭曲吸收管。通过计算流体力学(CFD)模拟，优选出最优集管直径为51mm。在质量流量为0.04kg/s、太阳辐照水平为800W/ m2时，双扭管的利用显著提高了光伏效率、热效率和光伏热效率，光伏热效率从61.2%提高到84.6%。研究了纳米流体对PVT系统的影响，纳米流体对光伏热效率的贡献更大，从84.6%提高到88.2%。这些发现为高性能流体PVT系统的设计提供了有价值的见解，突出了扭曲管和纳米流体在提高系统效率方面的潜力。

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来源期刊

International Journal of Renewable Energy Research Energy-Energy Engineering and Power Technology

CiteScore

2.80

自引率

10.00%

发文量

期刊介绍： The International Journal of Renewable Energy Research (IJRER) is not a for profit organisation. IJRER is a quarterly published, open source journal and operates an online submission with the peer review system allowing authors to submit articles online and track their progress via its web interface. IJRER seeks to promote and disseminate knowledge of the various topics and technologies of renewable (green) energy resources. The journal aims to present to the international community important results of work in the fields of renewable energy research, development, application or design. The journal also aims to help researchers, scientists, manufacturers, institutions, world agencies, societies, etc. to keep up with new developments in theory and applications and to provide alternative energy solutions to current issues such as the greenhouse effect, sustainable and clean energy issues.