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<p>Solar renewable energy has the potential for industrial and commercial heat exchanger applications due to its superior heat transfer, improved absorption, better thermal performance, and eco-friendliness. However, it found that low thermal efficiency, minimized temperature distribution due to climate conditions, uneven temperature transmission, and low heat storage behaviour. This research intense to overcome the dispute and enhance the overall thermal performance and energy storage behaviour of solar thermal heat exchangers featuring flat plate collectors (FPC) through the adaptation of 60:40 ratios of alumina (Al<sub>2</sub>O<sub>3</sub>): titanium dioxide (TiO<sub>2</sub>) hybrid nanofluid and paraffin with salt hydrates phase change material (PCM) (70:30). During the experimentation, 1–3 percentages vary the hybrid nanofluid concentration in volume (vol %), which is operated by 7&#xa0;L&#xa0;min<sup>−1</sup> flow rate. Influences of hybrid nanofluid concentration and PCM on the thermal performance of solar thermal heat exchangers are investigated, and its results are compared with water fluid/PCM configuration. The findings indicated that a hybrid nanofluid concentration of 3&#xa0;vol% resulted in optimal thermal properties, including high thermal conductivity of 0.76&#xa0;W&#xa0;m<sup>−1</sup>&#xa0;K<sup>−1</sup>, better heat gain of 303.9&#xa0;W, extended heat storage behaviour of 442.1&#xa0;kg<sup>−1</sup>, reduced heat loss value of 48.7&#xa0;W, and enhanced thermal/exergy efficiency behaviour of 69.4% and 19.7%. This optimum solar thermal heat exchanger system is proposed for medium-scale industrial heat exchanger applications.</p>

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Effect of paraffin with salt hydrates PCM and hybrid Al2O3/Tio2 nanofluid on thermal and energy storage characteristics of solar thermal heat exchanger

  • 期刊论文

  • 发表日期：

    2025年4月18日

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  • R. Venkatesh,
  • Prashant Sharma,
  • Ch. China Subbarao,
  • Vinayagam Mohanavel,
  • Kajuluri Veerababu,
  • Abhilasha Jadhav,
  • M. Ravichandran,
  • Manzoore Elahi M. Soudagar,
  • Majed A. Alotaibi

摘要

Solar renewable energy has the potential for industrial and commercial heat exchanger applications due to its superior heat transfer, improved absorption, better thermal performance, and eco-friendliness. However, it found that low thermal efficiency, minimized temperature distribution due to climate conditions, uneven temperature transmission, and low heat storage behaviour. This research intense to overcome the dispute and enhance the overall thermal performance and energy storage behaviour of solar thermal heat exchangers featuring flat plate collectors (FPC) through the adaptation of 60:40 ratios of alumina (Al2O3): titanium dioxide (TiO2) hybrid nanofluid and paraffin with salt hydrates phase change material (PCM) (70:30). During the experimentation, 1–3 percentages vary the hybrid nanofluid concentration in volume (vol %), which is operated by 7 L min−1 flow rate. Influences of hybrid nanofluid concentration and PCM on the thermal performance of solar thermal heat exchangers are investigated, and its results are compared with water fluid/PCM configuration. The findings indicated that a hybrid nanofluid concentration of 3 vol% resulted in optimal thermal properties, including high thermal conductivity of 0.76 W m−1 K−1, better heat gain of 303.9 W, extended heat storage behaviour of 442.1 kg−1, reduced heat loss value of 48.7 W, and enhanced thermal/exergy efficiency behaviour of 69.4% and 19.7%. This optimum solar thermal heat exchanger system is proposed for medium-scale industrial heat exchanger applications.