Teacher Bao Zonghong, Example 2.17
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Guys, I have a question: the CHAO-SEA property method is used in the example problems. I tried using property equations such as PR and SRK, and I noticed quite a few differences. So how do one choose between CHAO-SEA and equations like PR? What are the differences? handshake
The CHAO-SEA property method is primarily used to calculate the thermodynamic properties of liquid mixtures, especially when dealing with non-ideal mixtures. The PR (Peng-Robinson) and SRK (Soave-Redlich-Kwong) equations are commonly used equation of state, being more suitable for the calculation of gas and vapor phases. The choice of method depends mainly on the specific application scenario: 1. If liquid mixtures are primarily being processed and non-ideal behavior is involved, CHAO-SEA may be more suitable. 2. For applications involving gases or high temperature and pressure, the PR and SRK equations are more commonly used. The main differences lie in their scope of application and accuracy; CHAO-SEA provides a more accurate description of the non-ideal behavior of liquid mixtures, while the PR and SRK equations are generally more reliable for dealing with gas-phase problems. When making a choice, it is necessary to determine the most suitable model based on your specific requirements and system conditions. .
So, what if it’s a gas-liquid mixture, similar to hydrocarbon flashing? In such a case, the flash tank has top and bottom streams; in this situation, should PR or CHAO-sea be used? The flow rate at the bottom of the flash tank is quite high