|
Strategy To Build A Hysys Simulation
#1
Posted 19 March 2018 - 09:33 AM
#2
Posted 19 March 2018 - 04:05 PM
It's usually best to start at the beginning. And I always use a simple heater and cooler for a heat exchanger. You will need lots of recycle convergence controls, so pick the right streams to tear. You can learn a lot by starting with pencil and paper to map your equipment. It seems that this approach takes a long time, but for the inexperienced, this approach will get you to a solution sooner. Unless, of course, one of your colleagues has a simulation close to what you need. You won't develop good skills with this method, but it will probably produce results sooner. So, whatever you choose you should have an outcome objective, including time required.
Good Luck!
Bobby
#3
Posted 19 March 2018 - 10:04 PM
Never simulated a CDU, but ran many simulations of other processes. My recommendation would be similar to Bobby's
- Start simple: i.e. use simple heater instead of two streams exchangers to begin and specify the columns in a way it is sure to give you a result (any result), like bottom rate and reboiler duty
- If you have recicle streams, tighten your flash convergence spec to max and pay attention to traces cuttoff. Accumulation of errors is usually a cause of non convergence.
- Then start to modify/add one thing a time. In many situations, you will find that changing one little thing causes the problem to never converge. Perhaps you added efficiencies to trays, or modified an spec, or added a recycle stream. If you modify more than one thing, you will never know what went wrong and will start touching many things like convergence algorithms, number of iterations, etc, etc... until your are lost.
- Always save a converged solution along the way, so you have a point to backtrack to.
#4
Posted 20 March 2018 - 04:48 AM
#5
Posted 26 March 2018 - 02:31 AM
Titim,
firstly, you have to replace the preheat train with a simple heater because you don't have products ( naphtha, kerosene, ...) and after runing the simulation of the column return to the preheat train and you can put exchangers.
good luck.
Similar Topics
Olga And Aspen Simulation SoftwareStarted by Guest_CHEMSTRONG_* , 27 Mar 2024 |
|
|
||
Aspen Custom Model Won't Load Into HysysStarted by Guest_SaintLazarus_* , 21 Mar 2024 |
|
|
||
Aspen Hysys SimulationStarted by Guest_amazingspidermean_* , 18 Mar 2024 |
|
|
||
Linear Alkyl Benzene Sulfonic Acid Production (Labsa) SimulationStarted by Guest_Emranm02_* , 03 Mar 2024 |
|
|
||
Using Vector User Variable In HysysStarted by Guest_Ulbert Zsolt_* , 01 Mar 2024 |
|
|