ABSTRACT

After analyzing the effect of perforation in a single pass solar air heater in part A, an experimental comparative study was performed on a Double Pass Parallel Flow Solar Air Heater (DPPFSAH) roughened with continuous and perforated multi-V rib roughness. In DPPFSAH, for perforated rib roughness, the gain in Nu/Nus, f/fs, and Thermo-hydraulic performance parameter (THPP) for W/w = 6 are 8.33, 9.09, and 2.97, respectively. While for continuous rib for W/w = 6 the values of Nu/Nus, f/fs, and THPP are 5.93, 10.83, and 1.82, respectively, as compared to the smooth plate. The results strongly support the application of perforation in artificial roughness.

摘要

在分析了 A 部分中单通道太阳能空气加热器的穿孔效果后，对具有连续和穿孔多 V 肋粗糙度的双通道平行流太阳能空气加热器 (DPPFSAH) 进行了实验比较研究。在 DPPFSAH 中，对于穿孔肋粗糙度，W/w = 6 时 Nu/Nus、f/fs 和热液压性能参数 (THPP) 的增益分别为 8.33、9.09 和 2.97。而对于 W/w = 6 的连续肋，与光滑板相比，Nu/Nus、f/fs 和 THPP 的值分别为 5.93、10.83 和 1.82。结果有力地支持了穿孔在人工粗糙度中的应用。