An ideal Brayton refrigeration cycle has a compressor ratio of 3.75. The air enters the compressor at 1bar, 27°C. The temperature at the inlet of the turbine is 77°C. Using Air Standard Method Determine on a per unit mass of air flowing
a) The net work input
b) The refrigeration Capacity
c) The coefficient of performance
d) The coefficient of performance of a Carnot refrigeration cycle operating between reservoirs temps of 27 and 77 degrees Celsius.