Refrigerant 134a enters the compressor of a refrigeration system with a mass flow rate of 0.08 kg/s as saturated vapor at -12°C and is compressed to 9 bar, 40°C. The refrigerant then enters the condenser and exits as saturated liquid at 9 bar. The compressor power input is 2.6 kW. Assuming steady-state operation, and neglecting kinetic and potential energy effects, show the states on the 7-v diagram and determine the heat transfer rates for the compressor and condenser, each in kW. 2-9 bar T- 40°C (2) - Condenser (3) P-9 bar Sat. liquid W-26 kW Compressor Sat. vapor T-- 12°C i, - 0.08 kg/s

Refrigerant 134a enters the compressor of a refrigeration system with a mass flow rate of 0.08 kg/s as saturated vapor at -12°C and is compressed to 9 bar, 40°C. The refrigerant then enters the condenser and exits as saturated liquid at 9 bar. The compressor power input is 2.6 kW. Assuming steady-state operation, and neglecting kinetic and potential energy effects, show the states on the 7-v diagram and determine the heat transfer rates for the compressor and condenser, each in kW. 2-9 bar T- 40°C (2) - Condenser (3) P-9 bar Sat. liquid W-26 kW Compressor Sat. vapor T-- 12°C i, - 0.08 kg/s

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter45: Domestic Refrigerators And Freezers

Section: Chapter Questions

Problem 12RQ: Refrigerators currently being manufactured in the United States are using______as their refrigerant.

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Refrigerant 134a enters the compressor of a refrigeration system with a
mass flow rate of 0.08 kg/s as saturated vapor at -12°C and is compressed to 9 bar, 40°C.
The refrigerant then enters the condenser and exits as saturated liquid at 9 bar. The
compressor power input is 2.6 kW. Assuming steady-state operation, and neglecting
kinetic and potential energy effects, show the states on the T-v diagram and determine the
heat transfer rates for the compressor and condenser, each in kW.
P2-9 bar
T- 40°C
(2)
Condenser
Qend
T.
(3)
P=9 bar
Sat. liquid
W=-2.6 kW
W=0
Compressor
Sat. vapor
T-- 12°C
i, -0.08 kg/s

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