Design of Vapour Compression Refrigeration Cycle

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SUMMARY

The discussion focuses on designing a Vapour Compression Refrigeration Cycle using R134a as the refrigerant. Key parameters include evaporator pressure, superheating, condenser pressure, and subcooling, which significantly affect system performance. The project requires the use of a capillary tube instead of an expansion valve, necessitating calculations for mass flow rate based on capillary characteristics. Participants seek guidance on design software and foundational concepts to optimize their refrigeration system.

PREREQUISITES
  • Understanding of Vapour Compression Refrigeration Cycle principles
  • Knowledge of refrigerant properties, specifically R134a
  • Familiarity with thermodynamic concepts such as superheating and subcooling
  • Experience with capillary tube flow calculations
NEXT STEPS
  • Research the impact of evaporator pressure on refrigeration efficiency
  • Learn about superheating techniques in Vapour Compression systems
  • Investigate condenser pressure optimization methods
  • Explore software tools for refrigeration cycle design, such as REFPROP or CoolPack
USEFUL FOR

This discussion is beneficial for mechanical engineering students, HVAC professionals, and anyone involved in designing or optimizing refrigeration systems.

RicardoGhent
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Hi!

For our class project, we have to design a system that freezes an amount of water as quick as possible.
The refrigerant is R134a. The compressor is known.
I don't really know how to get started here. How do I choose the evaporator pressure and the superheating, and equally the condensor pressure and subcooling?
We have to use a capillar instead of expansion valve, with given characteristics to find the mass flow rate at a given capillar length/diameter.
Is there someone here who can be a quick guide or who knows any usefull design software?
Thanks a lot!
 
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Welcome to PF!

What impacts do evaporator pressure and superheat and condenser pressure and subcooling have on the functioning of the refrigerator? The answers to these questions are in your thermo book and you'll need to make an effort to find them answer them yourself in order for us to help you.
 

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