1) A flat-plate solar collector is used to heat atmospheric air flowing through a rectangular channel. The bottom surface of the channel is well insulated, while the top surface is subjected to a uniform heat flux, which is due to the net effect of solar radiation absorption and heat exchange between the absorber and cover plates. For inlet conditions of mass flow rate=0.1 kg/s and Tmi=40 C, what is the air outlet temperature, if L=3 m, w=1 m and the heat flux is 700 W/m ? The specific heat of air is cp=1008 J/kg.K

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