Calculate Specific Heat Capacity HELP

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SUMMARY

Calculating the specific heat capacity (cp) for refrigerant R-134a in gas-phase requires careful consideration of thermodynamic properties. Andreas, a Master's student, seeks assistance in determining cp using available data on entropy, enthalpy, and temperature, while acknowledging that assuming ideal gas behavior may not be appropriate for practical applications. The discussion emphasizes the need for a systematic approach to compute specific heat across different phases: gas, two-phase, and liquid.

PREREQUISITES
  • Understanding of thermodynamic properties such as entropy and enthalpy.
  • Familiarity with refrigerant R-134a and its phase behavior.
  • Knowledge of specific heat capacity calculations.
  • Basic principles of thermodynamics applicable to real gases.
NEXT STEPS
  • Research the specific heat capacity equations for refrigerants, particularly R-134a.
  • Explore the use of thermodynamic tables for R-134a to extract necessary properties.
  • Learn about the differences in calculating specific heat for gas, two-phase, and liquid states.
  • Investigate software tools for thermodynamic property calculations, such as REFPROP or CoolProp.
USEFUL FOR

Students and professionals in thermodynamics, particularly those working with refrigerants, engineers involved in HVAC systems, and anyone conducting research related to heat transfer and thermodynamic properties.

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Calculate Specific Heat Capacity HELP!

Hi guys,

I having big troubles with how to calculate the specific heat (cp) for refrigerant r134a i gas phase.
I think that assuming ideal gas behavior is a bad idea since this is going to be used in a actual system...

I have values of entropy, enthalpy, temperature etc for the region where the refrigerant is in gas-phase.

Please help!

Thanks in advance!

Regards,
Andreas
 
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how would you like to give the specific problem? but just a reminder,we are not allowed to post assignments here. doing it your way first will deliver you to close answer. start the computation so everyone could help you in some parts, but not totally, get me?
 


121910marj said:
how would you like to give the specific problem? but just a reminder,we are not allowed to post assignments here. doing it your way first will deliver you to close answer. start the computation so everyone could help you in some parts, but not totally, get me?

Hi sorry for late answer. It's not an assignment it's a part of my Master Thesis. Thermodynamics is not my best field and that's why I posted this question. I need to calculate the specific heat capacity for refirgerant R-134a in three different phases; gas-phase, two-phase and liquid-phase. I havn't found any equation that can help me so I'm kind of stuck. I've got a table with enthalpy, pressure, temperature etc to help me.

Hope you understand my problem better know. Thanks in advance!
 

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