Thermal Performance of Solar Air Heater Having Absorber Plate with V-Down Discrete Rib Roughness for Space-Heating Applications

Table 1

Values of parameters.

Parameter	Value
Absorber plate-glass cover transmittance absorptance product, 𝜏𝛼	0.8 (fixed) for single glass cover
Gap between the absorber plate and glass cover, 𝛿𝑝𝑔	40 mm
Insulation	Foamed polystyrene or glass wool
Thermal conductivity of insulation, 𝑘𝑖	0.037 Wm^−1 K^−1
Insulation thickness, 𝛿	50 mm
Long wave emissivity of glass cover, 𝜀𝑔	0.88