How to calculate heat capacity of supercritical CO2

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SUMMARY

The discussion focuses on calculating the heat required to raise the temperature of carbon dioxide (CO2) from -40°C to 50°C while transitioning through its critical point at 31°C and 73 bar. The recommended tools for this calculation include the NIST database for thermodynamic properties and the Engineering Equations Solver (EES) for analyzing various substances. Accurate heat capacity values are essential for determining the total heat required during this process, particularly in the supercritical state of CO2.

PREREQUISITES
  • Understanding of thermodynamic principles, particularly heat capacity.
  • Familiarity with the critical point concepts of substances.
  • Knowledge of the NIST database for thermodynamic properties.
  • Experience using Engineering Equations Solver (EES) for property calculations.
NEXT STEPS
  • Research the specific heat capacity of supercritical CO2 at varying temperatures and pressures.
  • Learn how to utilize the NIST database for thermodynamic property data.
  • Explore the capabilities of Engineering Equations Solver (EES) for thermal analysis.
  • Study the implications of phase changes in CO2 during heating processes.
USEFUL FOR

Thermodynamic engineers, chemical engineers, and researchers involved in thermal analysis and supercritical fluid applications will benefit from this discussion.

ceramic57
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Hello,
1. How can I calculate the heat required to raise the temperature of Carbon dioxide. It is at -40C and then it is to be heated to 50 C... The operating Pressure is above critical, so when it crosses the critical temperature point, the liquid CO2 would change into super critical state. (I hope I am right till now)... So how do I calculate the total heat required for this process? The critical point for CO2 is almost 31 C and 73 bar.
 
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Hi ceramic. Welcome to the board. If you're doing a lot of thermo analysis and need properties of CO2, I'd suggest purchasing the NIST http://www.nist.gov/srd/nist23.cfm" .
 
Last edited by a moderator:
you can use Engineering Equations Solver (EES) for properties of different substances
 

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