Which thermodynamic equation is used for propylene compression?
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Question: At normal pressure and temperature, when gaseous propylene is compressed to 1.6 MPa, its temperature changes significantly; afterward, when it is cooled to 15 degrees, it turns into a liquid. Which thermodynamic equation is appropriate to use in this process? ? This post was last edited by visavis on 2009-3-30 16:23]
Comparisons were made using several equation of state and universal correlation equations, and the results showed little difference. Let me ask again: is this Dr. Han the same Dr. Han from the Chemical Engineering Technology Forum?
Yes, but the data generated by simulation differ significantly from those calculated manually, especially regarding the heat load, with a difference of 25%. That’s why I’m asking here; I hope the experts can do the calculations themselves and help me out.
The heat load involves latent heat and sensible heat; by comparing the data used in calculations with the data from software, it becomes clear where the errors lie.
PR and SRK are more suitable, but it is necessary to ensure that the impact on trace amounts of water is not taken into account.
For the PR equation, since the pressure is already quite high, a state equation is more appropriate. If the results differ significantly, you can check the input parameters as well as the settings for the target parameters.