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In the realm of solar energy collection, the SAH is a popular device. In tentionally roughening the surface of a SAH's duct is a helpful method for increasing heat transfer (HT) to the fluid it passes through. This study aims to use discrete arc roughness in a circular pattern to improve THP in SAHs. The experimental investigation of the SAH was carried out using a discrete arc roughness in a circular design form to ascertain and enhance THP. During testing, the following roughness element factors were used: Reynolds Number, Re = 2975–137,393; angle of arc, α = 30°, 45°, 60°, 75°; p/e = 10–11.67; and W/H = 8. Experiments showed that friction factor (f) and Nusselt Number (Nu) are 2.42 and 2.85 times greater than smooth plate.

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Experimental Assessment of Solar Air Heater Using Discrete Arc Roughness in the Circular Fashion on the Absorber Plate

  • 会议论文

  • 发表日期：

    2026年

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  • Yogesh Agrawal,
  • Anil Singh Yadav,
  • Vikas S. Pagey,
  • Sachin Ganpatrao Ghalme,
  • Abhishek Sharma,
  • Yogesh Kumar Falak

摘要

In the realm of solar energy collection, the SAH is a popular device. In tentionally roughening the surface of a SAH's duct is a helpful method for increasing heat transfer (HT) to the fluid it passes through. This study aims to use discrete arc roughness in a circular pattern to improve THP in SAHs. The experimental investigation of the SAH was carried out using a discrete arc roughness in a circular design form to ascertain and enhance THP. During testing, the following roughness element factors were used: Reynolds Number, Re = 2975–137,393; angle of arc, α = 30°, 45°, 60°, 75°; p/e = 10–11.67; and W/H = 8. Experiments showed that friction factor (f) and Nusselt Number (Nu) are 2.42 and 2.85 times greater than smooth plate.