Solve Energy Transfer in Refrigeration System

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SUMMARY

The discussion focuses on calculating the rate of energy transfers in a refrigeration system using refrigerant-134a. The refrigerant enters the compressor as saturated vapor at 0.14 MPa and exits as superheated vapor at 0.8 MPa and 50°C, with a mass flow rate of 0.04 kg/s. Participants emphasize applying the conservation of mass and energy principles, specifically determining the internal energy changes during the process. The discussion highlights the importance of using the correct thermodynamic formulas from the textbook to solve the problem accurately.

PREREQUISITES
  • Understanding of thermodynamic principles, specifically conservation of mass and energy
  • Familiarity with refrigerant properties, particularly refrigerant-134a
  • Knowledge of thermodynamic tables for refrigerants
  • Ability to apply internal energy calculations in refrigeration systems
NEXT STEPS
  • Study the thermodynamic properties of refrigerant-134a using property tables
  • Learn how to calculate internal energy changes in refrigeration cycles
  • Explore the application of the First Law of Thermodynamics in refrigeration systems
  • Investigate the effects of pressure and temperature on refrigerant phase changes
USEFUL FOR

Engineering students, HVAC professionals, and anyone involved in the design or analysis of refrigeration systems will benefit from this discussion.

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The problem statement
Refrigerant- 134a enters the compressor of a refrigeration system as saturated vapor at 0.14 MPa, and leaves as superheated vapor at 0.8 MPa and 50C at a rate of 0.04 kg/s. Determine the rate of energy transfers by mass into and out of the compressor. Assume the kinetic and potential energies to be neglected.


I know that the rate of mass in is equal to the rate of mass out and I'm assuming that I only need to find the internal energ u. But I'm not really sure at all to be honest. I have my textbook with all the formulas but I don't know what to apply when or how. Could someone please help me. :confused:
 
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i think u should take a shot urself first, and show it. i don't know exactly if I'm allowed to help u just like that.
 
Apply conservation of mass and conservation of energy.
 

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