Answer to Question #219594 in Mechanical Engineering for Molahlegi

Question

Solar radiation is incident on a flat-plate collector at a rate of 260 W. The product of the transmissivity of glazing and the absorptivity of absorber plate is τα = 0.85 for this single glazing collector. The heat loss coefficient of the collector is 0.5 W/m2 °C. The collector is at an average temperature of 120 °C and the ambient air temperature is 67 °C. (a) Determine the efficiency of this collector. (b) Determine the efficiency of a double-glazing collector whose τα value is 0.80 and the heat loss coefficient is 0.3 W/m2 °C. Use the same collector and ambient air temperatures

Answer 1

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