A standard vapor – compression cycle developing 87 kw of refrigeration using refrigerant R502 operates with a condensing temperature of 50C and an evaporating pressure of 300 kpa, 1- sketch the cycle on a P-h diagram and fill below: Enthalpy (kj/kg) h1= h2= h3= h4= 3- The refrigerating effect in kilojoules per kilogram 3- The mass flow rate of refrigerant 4- The power required by the compressor 5- The coefficient of performance 6- The volume flow rate measured at the compressor suction 7- The compressor discharge temperature. 8- If the compressor outlet temperature was (T2 =

A standard vapor – compression cycle developing 87 kw of refrigeration using refrigerant R502 operates with a condensing temperature of 50C and an evaporating pressure of 300 kpa, 1- sketch the cycle on a P-h diagram and fill below: Enthalpy (kj/kg) h1= h2= h3= h4= 3- The refrigerating effect in kilojoules per kilogram 3- The mass flow rate of refrigerant 4- The power required by the compressor 5- The coefficient of performance 6- The volume flow rate measured at the compressor suction 7- The compressor discharge temperature. 8- If the compressor outlet temperature was (T2 =

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

Chapter28: Special Refrigeration Applications

Section: Chapter Questions

Problem 15RQ: Why is two-stage compression popular for extra-low-temperature refrigeration systems?

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Please Ans from 4 to 6

A standard vapor – compression cycle developing 87 kw of refrigeration using refrigerant R502 operates with a condensing temperature of 50C and an evaporating pressure of 300 kpa,

1- sketch the cycle on a P-h diagram and fill below:

Enthalpy (kj/kg) h1= h2= h3= h4=

3- The refrigerating effect in kilojoules per kilogram

3- The mass flow rate of refrigerant

4- The power required by the compressor

5- The coefficient of performance

6- The volume flow rate measured at the compressor suction

7- The compressor discharge temperature.

8- If the compressor outlet temperature was (T2 = 70C) calculate the isentropic efficiency.

9- Dryness factor using equation (X4)

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