Research Article
Performance Study of Solar Air Heater Having Absorber Plate with Half-Perforated Baffles
Table 1
Baffles and test duct details and experimental conditions.
| | Baffles (half-perforated baffles): | | Baffle thickness, δ = 0.9 mm | | Height, e = 19 mm | | Pitch, p = 134.1 mm | | Relative baffle pitch, p/e = 7.06 | | Open area ratio, β = 26% | | Arrangement: transverse to the flow |
| | Duct: | | Width, W = 298 mm | | Height, H = 38.4 mm | | Length, L = 1620 mm | | Hydraulic diameter, = 68 mm | | Baffle to duct height ratio, e/H = 0.495 | | Duct width to height ratio, W/H = 7.77 | | Collector aperture area, = 0.41.62 m2 |
| | Experimental conditions | | Mass flow rate of air per unit area of the absorber plate, G≈ 0.02–0.073 kgs−1m−2 | | Flow Reynolds number, Re ≈ 3000–11000 | | Solar insolation, –710 Wm−2 | | Wind velocity = 0.05–1.1 m s−1 |
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