Research Article
Performance Study of Solar Air Heater Having Absorber Plate with Half-Perforated Baffles
Table 2
Values of different parameters for performance prediction of baffled duct solar air heater.
| | Collector width, W | 1 m | | Collector length, L | 2 m | | Duct height, H | 35 mm | | Gap between absorber plate and glass cover | 50 mm | | Collector slope, β | 0° for horizontal | | Number of glass covers | 1 | | Transmittance-absorptance product, τα | 0.8 for single glass cover | | Thickness of glass cover | 4 mm | | Thermal conductivity of glass cover | 0.78 Wm−1 K−1 | | Thermal conductivity of back insulation material (Thermocol) | 0.037 Wm−1 K−1 | | Back insulation thickness | 50 mm | | Long wave emissivity | 0.88 for glass cover | | 0.95 for absorber with flat | | black paint | | Relative baffle height, e/H | 0.495 | | Relative baffle pitch, p/e | 7.0 | | Sky temperature, Ts | = Ta | | Ambient temperature, Ta | 285–315 K | | Wind heat transfer coefficient, | 5 and 10 Wm−2 K−1 | | Solar insolation, I | 500 and 800 Wm−2 |
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