The scope of the power plant section includes the following major equipment:

• two Siemens V94.3A2 gas turbine generator sets equipped with 40m exhaust gas bypass stacks and bypass dampers
• three further Siemens V94.3A2 gas turbine generator sets
• five Siemens two pressure heat recovery steam generators (HRSG) with 55m stacks
• two Siemens back pressure steam turbine generator sets

Shuweihat CGT 11, Berlin Factory of Siemens AG
September 2002

The power plant comprises two blocks of gas turbines. The first block comprises two large industrial frame gas turbines with bypass stacks and bypass dampers, exhausting into associated heat recovery steam generators (“HRSG’s”). This pair of gas turbines delivers power to the 220kV substation. The second block of three gas turbines exhaust directly into their associated HRSG’s and deliver power to the 400kV substation. Each gas turbine is rated at 222MW gross at reference site conditions of 46°C, 42% relative humidity.

The heat recovery steam generators are of a two pressure design. Supplementary firing is used to enhance and provide flexibility in steam production, with an operational philosophy of operating this supplementary firing at all loads other than base load.

Two back pressure steam turbines each rated at 251.4MW gross generate power from the high pressure steam flow before exhausting to the process steam main. The steam turbines deliver power to the 400kV substation.

Power export from the power island is by cables at 220kV and 400kV to the electrical special facility where new 220kV and 400kV substations provide connections to the corresponding electricity transmission systems.

Field Erection of Desalination Unit 31
Shuweihat S1 Construction, Site October 2002

 

The desalination island comprises the following major plant systems:

• six 16.7 MIGD net multi stage flash (MSF) desalination plants
• two seawater cooled dump condensers
• seawater intake works including seawater pumphouse
• remineralisation plant
• six 77,000 m3 water storage tanks
• potable water pumping station

The desalination plant comprises six large MSF distillers supplied with steam from the exhaust of the steam turbines, or from steam from the bypass station if the steam turbines are out of service. The distillers are supplied with seawater from the seawater pumps and return brine discharge to the outfall canal. The product distilled water is remineralised to produce palatable potable water which is stored in the six storage tanks which represent 24 hours of water production by the plant. The potable water is delivered to the water transmission network via the potable water pumping station which forms the Water Special Facilities.

Sea Water Intake Piping
Shuweihat S1 Construction Site October 2002