3- Effect of glass cover thickness of distillation output:
Fig (4) indicated that increasing the glass cover thickness
from 2 mm, to 4 mm and 6 mm, increased significantly the
distillation output percentage, in the same order as the 6 mm
glass cover thickness gave the highest distillation output
percentage. This could be due to the heat loss in .6 mm
thickness which is less than that of 4 or 2 mm, since it
represents a high thermal resistance as compared to the other
thickness. This could be explained as the input quantity of
heat to 2 mm, 4 mm and 6 mm glass thickness are equally,
this due to the approximately equally, this due to the
approximately equally of transmittance and absorptance
3- Effect of glass cover thickness of distillation output:Fig (4) indicated that increasing the glass cover thicknessfrom 2 mm, to 4 mm and 6 mm, increased significantly thedistillation output percentage, in the same order as the 6 mmglass cover thickness gave the highest distillation outputpercentage. This could be due to the heat loss in .6 mmthickness which is less than that of 4 or 2 mm, since itrepresents a high thermal resistance as compared to the otherthickness. This could be explained as the input quantity ofheat to 2 mm, 4 mm and 6 mm glass thickness are equally,this due to the approximately equally, this due to theapproximately equally of transmittance and absorptance
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