OC Gsolar = 600 W/m 00000 Sun T= 25C OG Tsky = 15C-T = 70C Absorber plate Water tubes Insulation Soda-lime glass (2 mm) Typical transmission spectrum 1001 Transmission % 80 60 40 20 0 0 500 1000 1500 2000 2500 3000 3500 4000 Wavelength (nm) The top surface of a solar water heater of length 1m and thickness 50mm, which has a glass plate, which reduces the heat loss by convection from the collector plate. Assume glass has the properties, shown above for transmission. What would be the heat loss and water flow rate without the glass cover plate ? Include a glass cover plate and re-calculate the heat loss and water flow required to maintain the collector plate temperature at 70 C. Could any improvement be derived with a double pane window instead of a single plate and is this significant. Dimensions are given in the figure for the solar collector. Assume typical solar irradiation and weather conditions for the summer time in Georgia