We are very happy to see the constantly rising number of registrations!
For these participants, who still have not submitted their variables, we prepared few tips that might help you with getting started. Hope that helps!
- Reading through scientific paper is helpful, but not necessary for tackling our scientific challenge. Here are the highlights:
- The change-over time stops as soon as you reach the new product specifications. Find those specifications on page 3 or 4 (depending on the language).
- In the simulations you can change the four process variables twice. That's a total of eight variables to come up with. If you are looking for a place to start, have a look at the variables used for one-step-changeover in the paper. It can be found on page 11 or 12.
- The easiest way to enter a set of variables in the simulation is by using the Data Map:
- In CHEMCAD, go to the left side of the screen and click on Data Maps > Design Variable Control > Open.
- That opens the Excel sheet in which you can change the variable, then save, run the simulation and then see the result in the Excel sheet.
- To learn the most from a previous attempt, analyse the behaviour of each stream and identify bottlenecks (Plot -> Dynamic Plots -> Stream History).
- Penalty minutes are added for each minute of the simulation in which the heat exchangers are overused (see the paper for these side conditions on page 7 or 8).
- To see how the heat duties change over time, look at the dynamic report: select on of the columns, then click on Report -> Dynamics -> Column History and then include the Reboiler and/or Condenser Duty into the report.
If you have any questions about these points or any other questions on how to get going in the PSC, let us know!
27 November 2015