Scholarlink

In this study, a rectangular solar air heater design with an M-shaped dimple roughness put on it is examined. Based on the roughness of the rectangular duct, an approach is employed to assess the energy efficiency of the solar air heater and look into solar energy efficiency. After finishing the geometry of the dimple M-shaped rectangular channel and gathering parameters from many studies with a heat flux of 1000 W/m2, the smooth rectangular channel is connected to the dimple M-shaped roughness in order to increase the heat flow rate. The heat transmission rate is maintained by the range of relative gaps g = 0–1.3. A rectangular channel’s hydraulic diameter is determined by factors that fall into one of the following ranges: 4000–24,000. First, pitch space (p) between M-shaped roughness is given in a range of 24, 36, 48, and 60 mm were applied. This roughness was described as a continuous distance between each roughness and roughness at p/e = 4, 6, 8, and 10 where e = 6 mm height of roughness. The efficiency of a M-shaped solar air heater was evaluated by an analysis of its heat rate and Nusselt number. The results showed a 1.88–4.0 times increase as compared to a smooth channel. When compared to a smooth channel, the roughness solar air heater exhibited a friction factor 1.66–3.08 times higher at a Reynolds number of 24,000. The solar model ηmax = 2.25 has the highest efficiency.

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Numerical Investigation of Thermal Hydraulic Performance of Solar Air Heater with M-Shaped Roughness

  • 会议论文

  • 发表日期：

    2025年

查看全文
  • Harvindra Singh,
  • Durgeshwar Pratap Singh,
  • Narendra Gariya,
  • Chandra Kishore,
  • Shwetank Avikal,
  • Shivani Monga

摘要

In this study, a rectangular solar air heater design with an M-shaped dimple roughness put on it is examined. Based on the roughness of the rectangular duct, an approach is employed to assess the energy efficiency of the solar air heater and look into solar energy efficiency. After finishing the geometry of the dimple M-shaped rectangular channel and gathering parameters from many studies with a heat flux of 1000 W/m2, the smooth rectangular channel is connected to the dimple M-shaped roughness in order to increase the heat flow rate. The heat transmission rate is maintained by the range of relative gaps g = 0–1.3. A rectangular channel’s hydraulic diameter is determined by factors that fall into one of the following ranges: 4000–24,000. First, pitch space (p) between M-shaped roughness is given in a range of 24, 36, 48, and 60 mm were applied. This roughness was described as a continuous distance between each roughness and roughness at p/e = 4, 6, 8, and 10 where e = 6 mm height of roughness. The efficiency of a M-shaped solar air heater was evaluated by an analysis of its heat rate and Nusselt number. The results showed a 1.88–4.0 times increase as compared to a smooth channel. When compared to a smooth channel, the roughness solar air heater exhibited a friction factor 1.66–3.08 times higher at a Reynolds number of 24,000. The solar model ηmax = 2.25 has the highest efficiency.