At noon on a cloud-free summer day, sunlight intensities at the Earth’s surface are nearly always less than 940 W/m2 (0.12 hp/ft2
).
(a) At this intensity, if the solar collector and electric motor could convert 10%
of the collected solar energy to mechanical power, how large a collector would
be required on a tractor to supply 100 kW (134 hp) of mechanical power?
(b) If the length of the collector was twice its width, what would be the
dimensions of the collector?