Regarding the plate efficiency issue in the simulation
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In the tower simulations of Aspen and PRO II, when it is necessary to simulate actual trays, there are two methods. The first is to use the overall tray efficiency by converting the actual trays into theoretical trays; the other method involves using the actual trays along with the tray efficiency. How is the tray efficiency determined in these two methods?
The first method is to use the theoretical number of plates directly. The second method involves entering the actual number of plates and then specifying the plate efficiency (which can be specified in segments; the plate efficiency may not be the same for each segment)
I’m just asking what determines the plate efficiency? Is it based on the actual simulation process, and is it related to the actual tower?
My approach: In the case of simulation, I usually set the efficiency of the reboiler and condenser to 0.9–1, while setting the efficiency of the other components at around 0.6. I then check how well the calculation results match the actual operating conditions, and adjust the efficiencies accordingly.
1) If simulating an actual plant installation, a model can be created first, and then the plate efficiency can be adjusted so that the calculation results are close to the calibration data of the installation; in this way, the actual plate efficiency can be determined； 2) If actual calculations are to be carried out, empirical values are generally used ； Once calibration data is obtained after the device is operating properly, you can calculate again to adjust the efficiency of your plate ； 3) The process of determining board efficiency is an ongoing one that requires gradual accumulation of experience or seeking advice from more experienced colleagues
Learning from the experts’ explanations has been extremely beneficial~~~
Is it also related to the plate efficiency and the thermodynamic model chosen?