b. A refrigerating system using Freon-12 has an evaporator saturation temperature of - 25°C and a condenser saturation temperature of 35°C. The vapor is dry saturated at entry to the compressor and has a temperature of 65°C after compression to the condenser pressure. There is no undercooling of the liquid in the condenser. i. Calculate the input power required by the compressor per kW of refrigeration. ii. Calculate the COPRef of the refrigerating system. iii. Show the operating cycle of the refrigerating system on a T-s diagram.

b. A refrigerating system using Freon-12 has an evaporator saturation temperature of - 25°C and a condenser saturation temperature of 35°C. The vapor is dry saturated at entry to the compressor and has a temperature of 65°C after compression to the condenser pressure. There is no undercooling of the liquid in the condenser. i. Calculate the input power required by the compressor per kW of refrigeration. ii. Calculate the COPRef of the refrigerating system. iii. Show the operating cycle of the refrigerating system on a T-s diagram.

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

Chapter47: High-pressure, Low-pressure, And Absorption Chilled-water Systems

Section: Chapter Questions

Problem 13RQ: The subcooling temperature in a condenser can be measured by taking the difference between the A....

See similar textbooks

Similar questions

Four methods for controlling head pressure in an air-cooled condenser are ______, ______, _______, and
The subcooling temperature in a condenser can be measured by taking the difference between the A. suction pressure converted to temperature and the boiling refrigerant. B. boiling temperature and the condensing temperature. C. condensing temperature and the leaving-refrigerant temperature. D). condensing temperature and the entering-refrigerant temperature.
A typical temperature relationship between a high-efficiency condenser and the ambient temperature is A. 10F. B. 20F. C. 30F. D. 40F.
The typical difference in temperature between the cooling tower water supplied to the condenser and the out-door wet-bulb temperature is _____F.
The condensing pressure is 260 psig and the condenser outlet temperature is 108F for R-22. By how many degrees is the liquid subcooled in the condenser? A. 12F B. 42F C. 7F D. 14F
Define temperature glide, and give examples of where it occurs in a refrigeration system.
Define flash gas, and explain how it applies to the net refrigeration effect of the refrigeration cycle.
Define C.O.P. of the simple vapor compression refrigeration cycle R-134a. The evaporation temperature is -10° C and the condenser temperature is 40 ° C. COP =
In a system one evaporator is to provide 180 kW of refrigeration at -30C and another evaporator is to provide 200 kW at 5C. the condenser temperature is 40C. The system uses 2 – stage compression with intercooling and is arranged as in figure. Calculate the power required by the compressors.
Specify The C.O.P. of the cycle refrigeration vapor compression a simple R-717. Temperature evaporation is -20 °C and the temperature of the condenser is 30 °C (C.O.P is found using enthalpy)
A refrigeration system with a capacity of 10 tons of refrigeration, operates at 210 kPa evaporator, condenser while 1240 is at kPa. R-717 is saturated, calculate the theoretical power required If the refrigerant is to operate the compressor. Compressor Power% 3D
A standard ammonia vapour compression cycle developing 20 tons of refrigeration operates with a condensing temperature of 32 degree Celcius and an evaporating temperature of -14 degree Celsius. Calculate the a.) COP b.) gallons per minute of cooling water in the condenser if the change in temperature of the cooling water is 8 degree Celsius.