In a refrigerant 22 refrigeration system, the capacity is 200 kW at a temperature - 40°C. The vapor from the evaporator is pumped by one compressor to the condensing temperature 32°C. Later the system is revised to a two-stage compression operating on the cycle with inter cooling but no removal of flash gas at 789.15 kPa.

1: The evaporator mass flow rate is: 

a. 0.9913 

b. None 

c. 1 

d. 1.45 

e. 1.339 

2: Power required by single compressor is: 

a. 85.86 

b. 53.1 

c. 90 

d. None

e. 200 

3: The high stage compressor flow rate is: 

a. 0.255 

b. 0.9913 

c. 1.339 

d. 1.594 

e. None 

4: The enthalpy at the exit of the low stage compressor is:

a. Can't be determined 

b. None of the above 

c. 441 

d. 443 

e. 452.74 

5: The total power required by the two compressors is: 

a. 18.44 

b. 91.3 

c. 72.83 

d. 52.7 

e. None