Προβολή Εργασίας
USE DYNAMIC SIMULATION TO REVIEW PLANT DESIGN AND CONTROL
Ι. Μπεσσίρης, Σ. Ψαρρού, I. Phillips, Β. Χαρισμιάδης
Hyperion Systems Engineering |
ΣΥΝΤΟΜΗ ΠΕΡΙΛΗΨΗ
While plants continuously become more complex, chemical engineers, with the advent of computers and commercial-off-the-self simulation software, are now able to successfully re-design in a way that was not possible in the past. The technology used for (i) optimizing material flows and increasing the plant?s throughput, (ii) maximizing the equipment efficiency, and (iii) reviewing the resource utilization and enhancing planning and logistics, is now mature. Furthermore, access to experimental data, integrated solutions and ?what-if? scenarios is easier and more valuable than ever before.
Dynamic process simulation is one of the tools readily available to us. Using first principle, rigorous models we are able to simulate any process in great detail and analyze scenarios and situations that in the real plant would be difficult to monitor or, simply, dangerous.
For plants that are being designed, we need to:
- Demonstrate overall controllability, safe operability, reliability and the adequacy of process under all start-up, operating, transient and shutdown conditions.
- Meet regulatory demands for emissions and depressurizing.
- Test and accept the plant?s DCS and the emergency shutdown schemes.
- Develop operating procedures and train the operators to maximize production and quickly react to abnormal situations.
On the other hand, for existing plants we are typically required to:
- Maximize production and de-bottleneck specific plant areas.
- Verify that a planned DCS update will be smooth with minimal process disruption and ensure that new automations and sequences will operate as intended.
- Improve control strategies and pave the way for advanced control.
- Financially optimise the costs to the added value balance.
In this work, we will first review the process modelling requirements for each class of the aforementioned challenges. We examine the differences between the standard steady state process simulation and dynamic modelling. We proceed next with reviewing the special requirements of modelling for dynamic studies or a detailed checkout of the DCS logic and control loops. We illustrate our discussion with a series of examples from recently delivered projects.
Λέξεις Κλειδιά
DCS check out, dynamic simulation, operator training
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