Questions about using Aspen to simulate heat exchangers
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This post was last edited by cuiky on 2010-12-9 at 10:04. As the title suggests, I would like to ask the experts here: in the ECH purification process I am simulating, the steam from the top of the first dehydration tower is cooled to 70 degrees using a condenser; part of this steam condenses into a liquid, while the remaining uncondensed gas proceeds to the next condenser. What module should be used to simulate this condenser? Are there 2 outlets, one for the gas phase and one for the liquid phase? Is there a better way to model this process? I earnestly ask the experts for their guidance
Add a flash tank after the condenser to separate the two phases.
Thank you to the person above; that’s also a good idea. I’m sorry, I don’t have much wealth – I’m just a poor person – but I’ll give you 10 points of wealth in terms of spirit
I use it this way quite often too; I wonder if there’s a better way, hehe
I don’t know why, but the temperature of the material coming out of the top of the tower is very low; it should normally be 81 degrees. The temperature I measured is far below that value. Why is this? It also affects the subsequent calculations. This post is sinking too quickly – I need to get it brought to the top again so that experienced people can provide an answer
Reply to 5# cuiky: Upload the file and take a look.
Yes, send over your original file parameters so we can take a look together.
The top temperature is related to the operating pressure of the tower as well as the components in the distillate at the top; check whether the operating pressure of the tower and its units are correct
The problem has been resolved; it was the pressure that was the issue. However, the latest readings show that the tower temperature is a few degrees higher, and this is probably still related to the composition of the light components being distilled out