The Power Generation facility at Yanbu Industrial
City has been diversified for extra reliability.
The present facility consists of 9 gas turbine
units out of which 8 units are of 56.2 MW each
and ninth unit is of 68 MW, therefore, total
capacity from gas turbine is 517.6 Megawatt.
There are 3 steam turbine units of 127.5 MW
each with total capacity of 382.5 MW. One additional
steam turbine unit (130 MW) is under commissioning.
The electric generators deliver power at 13.8kV
to main transformers which step up the voltage
to 115 kV and connected to 115kV switchyard.
The gas turbines are using sales gas as a main
fuel for power generation while diesel (LFO)
is available as a back up. Steam turbines are
generating power through heavy fuel oil (HFO)
as a primary fuel but no back up fuel is there
for these units right now.
The gas turbines provided with 5 heat recovery
steam generators, produces 811 t/h steam, supplying
process steam to desalination plant, heavy fuel
oil tanks in tank farm area and steam turbine
plant. Each HRSG can receive exhaust gases from
only one gas turbine while the other gas turbine
is either operating in simple cycle mode or
on standby.
Moreover, there are two 4.2 MW Black start
diesel generator units available to enable restoration
of the power supply in case of black out. Also
there is a Hydrogen plant consists of 2 Hydrogen
Generators which can produce 424 SCFH Pure Hydrogen
gas 99% purity from each generator. The steam
turbine units are capable of supplying some
auxiliary steam for desalination plant during
emergency.