Parametric Study on the Thermal Performance and Optimal Design Elements of Solar Air Heater Enhanced with Jet Impingement on a Corrugated Absorber Plate

Table 3

Working conditions and assumptions used in evaluating the potential of the proposed design.

Parameter	Value
Solar radiation (I)	Clear sky day (W/m^2)
Ambient temperature (TA)	Associated ambient temperature of the selected clear sky day, 303–317.5 K
Air mass flow rate per unit area of the solar air heater (mf)	0.02–0.08 (kg/s)
Width of the heater (W)	0.3 (m)
Length of the heater (L)	1.4 (m)
Mean gap between the absorber plate and jet plate (Hg)	0.04 (m)
Mean gap between the absorber plate and cover (Hc)	0.04 (m)
Convection heat transfer from the glass cover due to wind (hw)	11.4 (W/m^2 K)
Absorptivity of solar radiation of the absorbing plate (αap)	0.95
Transmissivity of solar radiation of the glass cover (τc)	0.84
Solar radiation absorptivity of the glass cover (αc)	0.06
Emissivity of thermal radiation of the absorbing plate (εap)	0.94
Emissivity of thermal radiation of the bottom plate (εbp)	0.94
Thermal radiation emissivity of the glass cover (εc)	0.90