Device Performance Improvement of Double-Pass Wire Mesh Packed Solar Air Heaters under Recycling Operation Conditions

Abstract

Abstract:The improvement of device performance of a recycling solar air heater featuring a wire mesh packing was investigated experimentally and theoretically. The application of the wire mesh packing and recycle-effect concept to the present study were proposed aiming to strengthen the convective heat-transfer coefficient due to increased turbulence. Comparisons were made among different designs, including the single-pass, flat-plate double-pass and recycling double-pass wire mesh packed operations. The collector efficiency of the recycling double-pass wire mesh packed solar air heater was much higher than that of the other configurations for various recycle ratios and mass flow rates scenarios. The power consumption increment due to implementing wire mesh in solar air heaters was also discussed considering the economic feasibility. A fairly good agreement between theoretical predictions and experimental measurements was achieved with an analyzed error of 1.07%-9.32%.

Experimental study of the effect of slit width and slit spacing on the thermal performance of slit-glazed collectors

“…4 It has also been observed that by raising recycle proportion (R) from 0 to 2, the thermal efficiency of a double-pass wire mesh-packed SAH improves. 5 Different designs of the absorber plate, such as roughened multi V-rib with gap roughness, 6 protrusions, 7 roughened with rib-grooved, 8 W-shaped ribs, 9 discrete V-down ribs, [10][11][12] multiple v-rib, 13 multigap and V-down rib combined with staggered ribs, 14 wavy finned, 15 U-shaped turbulators, 16 V-baffle vortex generators, 17 and V-corrugated plate in the double-pass configuration 18 have been studied.…”

Experimental Study of Jet Impinging Double-Pass Solar Air Heater Using Wire-Mesh. (Dept. M)

“…its discovered that the warm proficiency of the bask-strong air cooling with introducing wire work impeccable was expanded and more prominent than without wire work spotless about 34.81%. Ho et al [2] evaluated the improvement in thermal efficiency of a reused solar air heater using metallic wire-mesh theoretically and experimentally. They compared different configurations in which a single-pass flat-plate, double-pass and recycling double-pass which has a wire mesh packing.…”