Streamlining an EPC project using dynamic simulation

Dynamic simulation has been employed as part of an Engineering, Procurement and Construction (EPC) project to revamp an existing onshore gas processing plant and build an adjacent greenfield facility. A detailed dynamic model was built for each of the gas plants to assess their controllability and operability. In order to model the hydraulics of the existing facility, an extensive 3D laser scan survey was conducted on site, which allowed the dynamic simulation team to model with a high level of fidelity. Additionally, off-shore model data was inputted to the dynamic simulation of the onshore facilities to model start-up scenarios.

Along with the advantages brought about by the 3D laser scan of the existing facility, this paper discusses the benefits that dynamic simulation can bring to an EPC project, with particular emphasis on the following studies:
• Accurately predict the relief load for process upsets;
• Centrifugal and reciprocating compressor complex control implementation and testing;
• Testing of start-up procedures.

Thanks to the dynamic simulation, it was possible to highlight any issues and implement mitigations prior to the start of the construction work, which avoided late change during commissioning / startup or subsequent operation.