Abstract Nanofluid-based spectral splitting concentrating photovoltaic thermal (CPV/T) system enables photovoltaic (CPV) cells and thermal absorbers to operate at different temperatures and realizes the utilization of full-spectrum sunlight. It is important to find one kind of low cost nanofluid that can be applied to nanofluid-based spectral splitting CPV/T system. In this study, the feasibility of using cost-effective glycol-ZnO nanofluid in spectral splitting CPV/T system was experimentally verified. A two-axis sun-tracking nanofluid-based spectral splitting CPV/T system was designed and fabricated. The solar energy conversion efficiency correlation coefficient was utilized to compare the thermodynamic performance of glycol-ZnO nanofluid-based spectral splitting CPV/T system with those of water-polypyrrole and water-Ag-SiO2 nanofluid-based spectral splitting CPV/T system. The effects of ZnO nanoparticles concentration in glycol-ZnO nanofluid on thermal and electrical performances were investigated. The cost comparisons of different types of nanoparticles were also conducted. The results indicated that the correlation coefficient of glycol-ZnO nanofluid-based spectral splitting CPV/T system was 0.218 and 0.05 higher than those of water-polypyrrole and water-Ag-SiO2 nanofluid-based spectral splitting CPV/T system, respectively. The cost of ZnO nanoparticles was 0.13%, 0.08% and 0.17% of cost of Au, Ag and polypyrrole nanoparticles, respectively.

中文翻译：

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基于高性价比ZnO纳米流体的光谱分裂CPV/T系统的实验研究

摘要 基于纳米流体的光谱分裂聚光光伏热（CPV/T）系统使光伏（CPV）电池和吸热器能够在不同温度下工作，实现全光谱太阳光的利用。寻找一种可应用于基于纳米流体的光谱分裂 CPV/T 系统的低成本纳米流体非常重要。在这项研究中，实验验证了在光谱分裂 CPV/T 系统中使用具有成本效益的乙二醇-ZnO 纳米流体的可行性。设计并制造了一种基于两轴太阳跟踪纳米流体的光谱分裂CPV/T系统。利用太阳能转换效率相关系数比较了乙二醇-ZnO纳米流体基光谱分裂CPV/T系统与水-聚吡咯和水-Ag-SiO2纳米流体基光谱分裂CPV/T系统的热力学性能。研究了乙二醇-氧化锌纳米流体中氧化锌纳米颗粒浓度对热性能和电性能的影响。还进行了不同类型纳米粒子的成本比较。结果表明，乙二醇-ZnO纳米流体基光谱分裂CPV/T系统的相关系数分别比水-聚吡咯和水-Ag-SiO2纳米流体光谱分裂CPV/T系统高0.218和0.05。ZnO纳米粒子的成本分别是Au、Ag和聚吡咯纳米粒子成本的0.13%、0.08%和0.17%，