Mixture enthalpy
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Dear seniors, I would like to ask how to calculate and find the enthalpy value of organic mixtures using ASPEN. I am new to ASPEN and am seeking advice from everyone
In ANALYSIS under PROPERTY, there is a MIXTURE. It should be this one.
With Lagun Logistics, enter the temperature, pressure, and flow rate, run the system, and you can see the enthalpy value of the mixture.
How is the specific heat capacity of the mixture calculated in Aspen? The answer given in Aspen’s help file is as follows: CPMX is calculated numerically from enthalpy calculations at different temperatures. Does this mean that the specific heat of the mixture is calculated using the changes in enthalpy of the mixture? It always feels wrong.
It means using numerical methods rather than analytical values for the calculations. It should be the enthalpy changes at different temperatures, but these two temperatures differ by a sufficiently small amount.
Can it be understood this way? Based on the enthalpy change before and after the material, using the formula CPMX=△H/m/△T; of course, the change in the enthalpy value of the mixture follows the mixing rules. Can it be understood this way?