In design of Solar Air Heaters (Sol-AHs) duct, the most efficient way to enhance the heat transfer is by providing artificial roughness on the absorber plate. In the present paper, experimental analyses perform on solar air heater (Sol-AHs) with novel discrete symmetrical arc rib geometry. The studied parameters are ratio of gap width to rib element diameter (g/e) of 2, 3, 4 and 5, ratio of rib diameter height to hydraulic diameter (e/Dh) as 0.045, ratio of rib pitch to rib element diameter as 10, air flow angle of attack as 30°, number of gaps 3 and Re in range of 3000–14000. The performance of novel discrete arc rib solar air heater has been compared with existing staggered V-rib geometry. Maximum enhancement in Nusselt number achieves at g/e equal to 4, which is 3.88 times more compared to the smooth plate, while the highest increment in the thermo-hydraulic performance also observes at g/e of 4. Correlations have been developed for ratio of gap width to rib element diameter and flow parameters. The mathematical model has been developed using a MATLAB code and validates with an experimental study, which further use to design the Solar Air Heater (Sol-AHs) under various operating parameters. Moreover, the new discrete symmetrical arc rib geometry has better performance than the existing best novel V-rib geometry.

在太阳能空气加热器（Sol-AHs）管道的设计中，增强传热的最有效方法是在吸收板上提供人工粗糙度。在本文中，对具有新颖的离散对称弧肋几何形状的太阳能空气加热器（Sol-AHs）进行了实验分析。研究的参数是间隙宽度与肋骨直径（g / e）之比为2、3、4和5，肋骨直径高度与水力直径之比（e / Dh）为0.045，肋距与肋骨直径之比为10，气流迎角为30°，气隙数3和Re的范围为3000–14000。新型分立式弧肋式太阳能空气加热器的性能已与现有的交错V型肋几何结构进行了比较。Nusselt数的最大增强达到g / e等于4，这是光滑板的3.88倍，当g / e为4时，也观察到了热工液压性能的最大增量。缝隙宽度与肋骨元件直径的比值和流动参数之间存在相关性。该数学模型是使用MATLAB代码开发的，并通过实验研究进行了验证，该实验研究进一步用于设计各种操作参数下的太阳能空气加热器（Sol-AH）。此外，新的离散对称弧肋几何结构比现有的最佳新型V型肋几何结构具有更好的性能。进一步用于设计各种操作参数下的太阳能空气加热器（Sol-AH）。此外，新的离散对称弧肋几何结构比现有的最佳新型V型肋几何结构具有更好的性能。进一步用于设计各种运行参数下的太阳能空气加热器（Sol-AH）。此外，新的离散对称弧肋几何结构比现有的最佳新型V型肋几何结构具有更好的性能。