APPLICATION OF DYNAMIC SIMULATION FOR DESIGN AND COMMISSIONING OF LNG PLANTS (EXPERIENCE IN MLNG TIGA PROJECT)

摘要

During the MLNG Tiga project, dynamic simulation was used by the EPC consortium of KBR and JGC working with project owner Malaysia LNG Tiga Sdn Bhd for several studies of plant design and verification of the plant performance. This approach proved to be very effective.rnAcceptance of Tested Performance of the Refrigerant Compressors rnThe as-tested performance curves of the refrigerant compressors were used within dynamic simulations to verify that the refrigerant compressors, together with the actual performance of other equipment, would meet the requirements for LNG production. rnUnique Power Exchange Concept between Gas Turbines rnBoth the MR compressor and propane compressor are powered by individual gas turbines. MLNG Tiga employs a unique power exchange concept between these two gas turbines. The excess power available from the propane compressor gas turbine is transferred to the MR compressor via synchronous electric motors/generators. Excess power can also be fed to the 50 Hz plant electrical distribution system from the 60 Hz circuit via a Load Commutated Inverter, and vice versa. rnDynamic simulation was performed in order to ensure the robustness of these integrated electric and process systems during start-up/shutdown,. The simulation model included a full representation of the propane, MR and the natural gas circuits. The process model was linked to an electrical simulation of the turbines and synchronous machines.