Air enters an ideal reverse Brayton cycle air conditioner at 14.7 psia and 35 8F with a mass flux of 4 lbtrils. The compressor has a pressure ratio of 4. The temperature at the inlet of the turbine is 100 8F. Assuming constant specific heats and ideal components, calculate:
(i) The low-cycle temperature
(ii) The power requirement of the cycle
(iii) The rate of heat flow from the heat exchanger
(iv) The coefficient of performance for this system