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| dc.contributor.author | YIGERMAL, MULUGETA AMARE | |
| dc.date.accessioned | 2022-03-31T07:17:39Z | |
| dc.date.available | 2022-03-31T07:17:39Z | |
| dc.date.issued | 2021-11 | |
| dc.identifier.uri | http://ir.bdu.edu.et/handle/123456789/13389 | |
| dc.description.abstract | In this study, the effect of solar reflector on the solar air heater efficiency integrated with a continuous V-shaped ribs as roughness parameter is investigated experimentally and numerically. Continuous V-shaped ribs, attached on the absorber plate is used to create turbulence in the flow. The solar reflector is used to increase the amount of solar radiation that imped the absorber plate. Four models of solar air heaters have been studied after designing. The first is smooth absorber plate without reflector, the second is the smooth absorber plate with reflector, the third is continuous v shaped roughed absorber plate with reflector, and the fourth one is continuous V-shaped roughed absorber plate without reflector. The temperature difference between inlet and out let air at the average solar radiation of 1160w/m 2 simulated using ANSYS FLUENT 18.1 results 22.54°C, 27.21°C, 32.28°C and 37.81°C at a mass flowrate of 0.05kg/s, 0.04kg/s, 0.03kg/s and 0.02kg/s, respectively for SAH with continuous V-shaped roughed absorber plate and reflector. The numerical result is reasonably agree with the experimental result with tolerable deviation. The average daily temperatures differences between the exit and inlet temperature of air for the smooth and roughed with reflectors, is 16.74°C and 27.81°C, respectively at 0.05 kg/s, and the maximum percentage increase of the hourly thermal efficiency due to the use of reflector is 2.9% in smooth SAH and 3.87% in roughed SAHs at 0.05kg/s. Key words: solar air heater, continuous v- shaped roughed, reflector with artificial roughness, efficiency improvement, ANSYS 18.1 | en_US |
| dc.language.iso | en_US | en_US |
| dc.subject | Thermal Engineering | en_US |
| dc.title | INVESTIGATING THE THERMAL PERFORMANCE IMPROVEMENT OF SOLAR AIR HEATER USING FLAT PLATE REFLECTORS ON THE SIDES AND CONTINUOUS V-SHAPED RIBS ON ABSORBER PLATE | en_US |
| dc.type | Thesis | en_US |
