(Solved): Consider two flat-plate collectors with different specifications. The transmissivity, absorptivity, ...

Consider two flat-plate collectors with different specifications. The transmissivity, absorptivity, and overall heat transfer coefficient parameters for the single glazing are given as $0.9,0.9$, and $12\mathrm{W}/{\mathrm{m}}^{2?}\mathrm{C}$, whereas the same parameters for the double glazing are calculated as $0.88,0.88$, and $8\mathrm{W}/{\mathrm{m}}^{2?}\mathrm{C}$, respectively. The heat removal factor for both collectors is 0.96 , the solar insulation is considered $800\mathrm{W}/{\mathrm{m}}^2$, and the ambient temperature is $25^{?}\mathrm{C}$. Accordingly, find the following parameters given as: a) The collector efficiency if the water enters the collector at $60^{?}\mathrm{C}$ b) The temperature of the water at which the collector efficiency is zerc c) The maximum collector efficiency considering the incident angle modifier as 1