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Thermal Performance Analysis of Porous Foam-Assisted Flat-Plate Solar Collectors with Nanofluids

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  • Xinwei Lin

    (School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei 230009, China)

  • Yongfang Xia

    (School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei 230009, China)

  • Zude Cheng

    (School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei 230009, China)

  • Xianshuang Liu

    (School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei 230009, China)

  • Yingmei Fu

    (School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei 230009, China)

  • Lingyun Li

    (School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei 230009, China)

  • Wenqin Zhou

    (School of Electronic and Information Engineering, Anhui Jianzhu University, Hefei 230009, China)

Abstract

This study proposed a model of a porous media-assisted flat-plate solar collector (FPSC) using nanofluid flow. The heightened thermal efficiency of FPSC undergoes numerical scrutiny, incorporating various factors for analysis, including aspects like the configuration of the porous block introduced, Darcy number ( Da = 10 −5 ~10 −2 ), types of nanoparticles, volume fraction ( φ ), and mixing ratio ( φ c ). The numerical findings indicate that the dominant factor in the channel is the global Nusselt number ( Nu g ). As the Darcy number rises, there is an improvement in the heat transfer performance within the channel. Simultaneously, for the case of Re = 234, φ = 3%, and φ c = 100%, the Nu g in the channel reaches a maximum value of 6.80, and the thermal efficiency can be increased to 70.5% with the insertion of rectangular porous blocks of Da = 10 −2 . Finally, the performance evaluation criteria (PEC) are employed for a comprehensive assessment of the thermal performance of FPSC. This analysis considers both the improved heat transfer and the pressure drop in the collector channel. The FPSC registered a maximum PEC value of 1.8 when rectangular porous blocks were inserted under conditions of Da = 10 −2 and Re = 234 and the nanofluid concentrations of φ = 3% and φ c = 100%. The findings can be provided to technically support the future commercial applications of FPSC. The findings may serve as a technical foundation for FPSC in upcoming porous media and support commercial applications.

Suggested Citation

  • Xinwei Lin & Yongfang Xia & Zude Cheng & Xianshuang Liu & Yingmei Fu & Lingyun Li & Wenqin Zhou, 2024. "Thermal Performance Analysis of Porous Foam-Assisted Flat-Plate Solar Collectors with Nanofluids," Sustainability, MDPI, vol. 16(2), pages 1-26, January.
    • Handle: RePEc:gam:jsusta:v:16:y:2024:i:2:p:693-:d:1318210
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    References listed on IDEAS

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    1. Anirudh, K. & Dhinakaran, S., 2020. "Performance improvement of a flat-plate solar collector by inserting intermittent porous blocks," Renewable Energy, Elsevier, vol. 145(C), pages 428-441.
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