In a cascade refrigeration system, the COPs of the cooling cycle and cascade are 3.7 and 4.2, respectively. If tonnage (1 TR = 3.52 kW) of the cooling cycle is 15 and the cascade removes 70% of the total heat rejected in the liquid receiver of the cooling cycle, then the powers required by the cooling and cascade compressors in hp are _____ and ______, respectively.

In a cascade refrigeration system, the COPs of the cooling cycle and c

1.	In a cascade refrigeration system, the COPs of the cooling cycle and cascade are 3.7 and 4.2, respectively. If tonnage (1 TR = 3.52 kW) of the cooling cycle is 15 and the cascade removes 70% of the total heat rejected in the liquid receiver of the cooling cycle, then the powers required by the cooling and cascade compressors in hp are _____ and ______, respectively.
A.	67.07, 46.95
B.	52.08, 39.35
C.	19.13, 14.99
D.	14.27, 11.18
Answer» D. 14.27, 11.18