The plant site includes three, 5.2 million tonnes per annum processing trains. A total of 51 process modules, weighing more than 200,000 tonnes make up the main components of the three trains. The first module – the knock-out flare drum (SANA) – was delivered in September 2012. The final module required for Train 1 – the liquefaction module (TADA) was delivered in June 2014. TADA is the heaviest required for the Project’s first processing train, weighing 6,300 tonnes – equal to the weight of more than 2,500 average size cars.
There are a total of 236 pre-assembled rack (PARs) modules which act as the main “artery” of the LNG plant, which will carry gas from one process unit to another during operations. The first PAR arrived in June 2012.
There are two LNG storage tanks, each with a capacity of 180,000 cubic metres or the equivalent to 72 Olympic size swimming pools. The first tank received “Ready for LNG” status in October 2014, followed by the second tank in January 2015. There are four condensate tanks, each with a capacity of 38,000 cubic metres. Construction has been completed on three of the four tanks.
The project has two Monoethylene glycol (MEG) processing facilities on the plant site – one for the Jansz-Io field and the other for the Gorgon field. MEG will play a critical role in the transportation of the gas from the fields to the plant, acting like antifreeze to absorb water and prevent hydrates from forming. Each facility includes four storage tanks – two rich MEG tanks and two lean MEG tanks which will enable MEG to be regenerated and re-used in a continuous cycle. Hydrotesting activities on the four monoethylene glycol (MEG) tanks required for Train 1 start-up were completed in May 2015.
Five gas turbine generators (GTG) will be used to power the LNG plant and associated facilities. In April 2015, the Project started-up the first GTG using domestic gas introduced from the Dampier to Bunbury Natural Gas Pipeline via Gorgon’s domestic gas pipeline. Once Gorgon is operational, the five GTGs will have the capacity to provide 584 megawatts of electricity – almost as much as the Kwinana Power Station which supplies much of the greater Perth area.
In early 2015, the ground flare required for the introduction of commissioning fuel gas became operational. Connected to the plant site by PARs, the Project’s ground flare consists of four flare boxes approximately 150 metres long, 75 metres wide with 14 metre high walls. The selection of a ground flare over an elevated vertical flare stack helps minimise environmental impacts by reducing light emissions due to the lower profile and height of the walls.