Subtopic: Sources of power on the farm – human, animal, mechanical, electrical, wind, solar and biomass
Question Statement:
A flat plate solar collector with an absorber area of 1.0×1.5 m receives a solar flux of 850 W m⁻² on the top cover. The indicated solar flux absorbed in the absorber plate is 600 W m⁻². The ambient temperature is 297 K. The heat loss coefficients of the collector at the side, bottom and top are 0.35, 0.65 and 3.50 W m⁻² K⁻¹ respectively with a collector heat-removal factor of 0.85. The collector fluid temperature is 333 K. Useful heat gain rate for the collector is