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Experimental analysis of graphene-COOH/water and TiO2/Water nanofluids in plate heat exchangers: Heat transfer performance and stability

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Listed:
  • Zeinali Heris, Saeed
  • Pasvei, Siavash
  • Pourpasha, Hadi
  • Mohammadfam, Yaghoub
  • Sharifpur, Mohsen
  • Meyer, Josua

Abstract

This study investigates the thermal performance of nanofluids (NFs) in plate heat exchangers (PHEXs), focusing on graphene-COOH/water and TiO2/water NFs as working fluids. The attributes of nanofluids, such as thermal conductivity (TC), specific heat capacity (SHC), viscosity, and density, were measured using the KD2 pro thermal analyzer, Cannon-Fenske opaque viscometer, and a density meter, which is a distinguishing aspect of this study. The maximum TC value is associated with the graphene-COOH/water nanofluid at 0.05 wt%, showing a 29.6 % increase compared to water. The convection heat transfer coefficient (CHTC) was also notably improved, with graphene-COOH/water achieving a 27.8 % enhancement compared to 15.6 % for TiO2/water. Furthermore, the study reveals that increasing the mass fraction of nanoparticles (NPs) results in a slight increase in pressure drop (ΔP), with a maximum increase of 3.8 % compared to water, which is considered negligible. The graphene-COOH/water NF demonstrated the highest performance index (η) of 1.247 at a Reynolds number of 134.59, indicating a 24.7 % improvement in efficiency. Overall, the findings suggest that the incorporation of NFs, particularly graphene-COOH/water, can significantly enhance the thermal efficiency of PHEXs while maintaining manageable ΔP, making them a promising option for industrial applications.

Suggested Citation

  • Zeinali Heris, Saeed & Pasvei, Siavash & Pourpasha, Hadi & Mohammadfam, Yaghoub & Sharifpur, Mohsen & Meyer, Josua, 2025. "Experimental analysis of graphene-COOH/water and TiO2/Water nanofluids in plate heat exchangers: Heat transfer performance and stability," Renewable Energy, Elsevier, vol. 245(C).
    • Handle: RePEc:eee:renene:v:245:y:2025:i:c:s0960148125004847
    DOI: 10.1016/j.renene.2025.122822
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    References listed on IDEAS

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    1. Taghizadeh-Tabari, Zohre & Zeinali Heris, Saeed & Moradi, Maryam & Kahani, Mostafa, 2016. "The study on application of TiO2/water nanofluid in plate heat exchanger of milk pasteurization industries," Renewable and Sustainable Energy Reviews, Elsevier, vol. 58(C), pages 1318-1326.
    2. Klemeš, Jiří Jaromír & Wang, Qiu-Wang & Varbanov, Petar Sabev & Zeng, Min & Chin, Hon Huin & Lal, Nathan Sanjay & Li, Nian-Qi & Wang, Bohong & Wang, Xue-Chao & Walmsley, Timothy Gordon, 2020. "Heat transfer enhancement, intensification and optimisation in heat exchanger network retrofit and operation," Renewable and Sustainable Energy Reviews, Elsevier, vol. 120(C).
    3. Gupta, Munish & Singh, Vinay & Kumar, Rajesh & Said, Z., 2017. "A review on thermophysical properties of nanofluids and heat transfer applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 74(C), pages 638-670.
    4. Zhang, Ji & Zhu, Xiaowei & Mondejar, Maria E. & Haglind, Fredrik, 2019. "A review of heat transfer enhancement techniques in plate heat exchangers," Renewable and Sustainable Energy Reviews, Elsevier, vol. 101(C), pages 305-328.
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