Master of Science Thesis. — Göteborg: Chalmers university of technology, Department of Chemical and Biological Engineering, 2013. — 69 p.A compressor system from an oil platform in the Norwegian Sea has been simulated in HYSYS Dynamics in order to evaluate a planned reconstruction. The model has been validated with operating data from the current system and then extended to simulate critical events of the new system. The focus of the simulations is on dynamic processes such as start-up and is intended to compliment existing steady-state models. The validation proved that the model mimics the real dynamics well with some exceptions, such as temperature profiles. When evaluating the proposed compressor system redesign, it was found that the anti-surge system of second compressor stage performed below expectations. Other benefits of using dynamic simulations in process design are also illustratedContents
Introduction
Objective
Scope
Thesis overview
Method
Compressor system theory
Compressors
Compressor curves
Rotor
Driver
Scrubber
Heat exchanger
Piping
alves
System control
Anti-Surge control
Scrubber, Heat exchanger and pressure control
Modeling
Dynamic simulations
HYSYS model
Compressor
Heat exchanger
Boundaries
Control
Other
Scenarios
Scenario A - Shutdown
Scenario B – Start-up
Scenario C – Step-change
alidation
Steady State validation – Dataset
Steady State validation – Dataset
alidation of dynamics, Shutdown – Dataset
alidation of dynamics, Start-up – Dataset
alidation discussion and conclusions
Modified design results and analysis
Scenario A - Shutdown
Scenario B - Start-up
Scenario C - Step-change
Conclusions
References
