2.) Consider a flat plate solar collector placed horizontally on the flat roof of a house. The collector is 5ft T= 50°F sky Solar collector 70°F wide and 15 ft long, and the average temperature of the exposed surface of the collector is 100 °F. The emissivity of the exposed surface of the collector is 0.9. Determine the rate of heat loss from the collector by convection and radiation during a calm day when the ambient air temperature is 70 °F and Figure 2 Problem 2 the effective sky temperature for radiation exchange is 50 °F. Take the convection heat transfer coefficient on the exposed surface to be 2.5 BTU/h-ft2- °F.

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Numerical Calculations

In the mid-20th century, the availability and the growth in power of digital computers led to the increase in the mathematical model in the field of engineering and science. The analysis of these detailed models needs to be increased.