A dynamic simulator and steady state optimization tool are being used to support the development of the Snøhvit LNG plant and ensure maximum production
The LNG plant at Melkøya
Having spent many years developing a commercial LNG heat exchanger with Linde, Statoil researchers possess more insight into the liquefaction process than many of their competitors.
This knowledge is now being used to help staff at the plant prepare for optimal operation.
This includes the tailoring of a commercial dynamic simulator to support engineering studies throughout the lifetime of the plant (i.e. from concept evaluation through detailed engineering, commissioning, start-up and operation).
A number of rigorous simulator modules are also being developed for key plant components, such as the main heat exchangers, as accuracy is all-important.
Another innovation is to use repeated simulations made by a steady state optimization tool to generate recommendations on how the plant should be operated to maximize LNG production and minimize energy consumption.
Important aspects include flow rates, temperatures, pressures and refrigerant composition.
The procedure is based on the input of actual (on-line) measurements and the results from principle (physical) models.
If this leads to an increase in LNG output by only a few per cent, the annual financial gain would be about USD 10 million.
Both tools are also important for educational purposes, not least the hands-on training of operators and managers.
