high pressure liquid refrigerant

low pressure liquid and vapour refrigerant

low pressure vapour refrigerant

none of these

zero

20

50

100

(B.P.F.) - 1

1 - (B.P.F.)

1/(B.P.F)

1+(B.P.F)

Right

Wrong

it considerably reduces mass of the system

it improves the C.O.P., as the condenser is small

the positive work in isentropic expansion of liquid is very small

it leads to significant cost reduction