Detailed Modeling of Flat Plate Solar Collector with Vacuum Glazing

Table 1

Comparison of cover glazing physical properties.

Properties	REF	VG1	VG2
Thickness of layers (mm)	4	4-0.2-4	4-0.2-4
Emissivity of surfaces (−)	0.85/0.85	0.85/0.85/0.85/0.85	0.85/0.85/0.2/0.85
Solar transmittance (−)	0.92	0.85	0.79
Thermal conductance at 20°C (W/m^2⋅K)	274.39	4.68	1.62