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Journal of Thermal Science

热科学学报

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2025 , Vol. 34 >Issue 6: 2072 - 2086

DOI: https://doi.org/10.1007/s11630-025-2195-1

Performance Investigation of PV/T System with Fe3O4@SiO2 Nanofluid Optical Filter

  • XIONG Can ,
  • ZHANG Xiaohui ,
  • FU Qi ,
  • HU Mingci ,
  • MA Ming ,
  • QING Shan ,
  • WANG Hua
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  • 1. State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China
    2. Department of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China

网络出版日期: 2025-10-29

基金资助

This work is supported by the Yunnan Fundamental Research Projects (No. 202301AT070469, No. 202301AT070275), and Yunnan Major Scientific and Technological Projects (No. 202202AG050002).

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Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2025
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Performance Investigation of PV/T System with Fe3O4@SiO2 Nanofluid Optical Filter

  • XIONG Can ,
  • ZHANG Xiaohui ,
  • FU Qi ,
  • HU Mingci ,
  • MA Ming ,
  • QING Shan ,
  • WANG Hua
Expand
  • 1. State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China
    2. Department of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China

Online published: 2025-10-29

Supported by

This work is supported by the Yunnan Fundamental Research Projects (No. 202301AT070469, No. 202301AT070275), and Yunnan Major Scientific and Technological Projects (No. 202202AG050002).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2025
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摘要

基于纳米流体PV/T分频系统的性能很大程度取决于所选纳米流体的特性。在本研究中，通过溶胶-凝胶法合成了Fe3O4@SiO2纳米流体，并对其光学性质和热稳定性进行了系统评估。光学测试表明，Fe3O4@SiO2纳米流体在650-1075 nm波长范围内具有高透射率，在可见光范围内具有高吸光度。连续加热下的热稳定性测试证实了其作为PV/T系统分频器的适用性。此外，进行了室内模拟太阳光照实验，以评估 Fe3O4@SiO2纳米流体在不同质量浓度和光程厚度下对PV/T分频系统性能的影响。结果表明，当光程厚度为 2 CM，质量浓度为50×10⁻⁶时，系统性能最佳，最优评价值（MF）达到 1.802。随后，进行了流速实验，以评估不同流速下该系统的热效率和MF。在流速为6 mL/min时，热效率达到 79.4%，MF值提高到2.34。此外，Fe3O4@SiO2 纳米流体分频器显著降低了光伏电池的工作温度。光照一小时后，光伏电池温度降低了36.43%，减轻了热致性能退化。这些研究结果为PV/T分频系统的优化和实际应用奠定了坚实基础。

关键词： photovoltaic/thermal system; nanofluid optical filter (NFOF); optical property; merit function; thermal stability

本文引用格式

XIONG Can , ZHANG Xiaohui , FU Qi , HU Mingci , MA Ming , QING Shan , WANG Hua . Performance Investigation of PV/T System with Fe3O4@SiO2 Nanofluid Optical Filter[J]. 热科学学报, 2025 , 34(6) : 2072 -2086 . DOI: 10.1007/s11630-025-2195-1

Abstract

The performance of a nanofluid-filtered PV/T system largely depends on the properties of the selected nanofluid. In this study, Fe3O4@SiO2 nanofluid is synthesized via the sol-gel method, and its optical and thermal properties are systematically evaluated. Optical tests show that Fe3O4@SiO2 nanofluid exhibits high transmittance in the 650–1075 nm wavelength range and strong absorbance in the visible spectrum. Thermal stability tests under continuous heating confirm its suitability as an optical filter for PV/T systems. Indoor experiments are conducted to assess the effects of Fe3O4@SiO2 nanofluid on the performance of filtered PV/T systems at varying mass concentrations and optical thicknesses. The results indicate optimal system performance with an optical thickness of 2 cm and a mass concentration of 50×10–6, achieving an MF (merit function) value of 1.802. Subsequently, flow rate experiments are performed to evaluate thermal efficiency and MF across various flow rates. At a flow rate of 6 mL/min, thermal efficiency reaches 79.4%, and the MF value increases to 2.34. Additionally, the Fe3O4@SiO2 nanofluid optical filter significantly reduces the operating temperature of photovoltaic cells. After one hour of illumination, the PV cell temperature decreases by 36.43%, mitigating thermal-induced performance degradation. These findings provide a solid foundation for the optimization and practical application of filtered PV/T systems.

Key words： photovoltaic/thermal system; nanofluid optical filter (NFOF); optical property; merit function; thermal stability

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