|
Location
Munmorah operates on the New South Wales Central Coast, about 110 km north of Sydney. The power station is located on the coastal strip between the Tuggerah Lakes, close to the Central Coast beaches. It is a very popular tourist area with important scenic and environmental attractions. Tourism and coal mining are the major local industries.
Munmorah staff has access to Sydney and Newcastle via high-speed freeways. Munmorah has been a vital part of the state's power generation system since 1967.
Turbo-Generators
Munmorah produces electricity using pulverised coal-fired boilers and steam-driven turbo-generators. The turbines are four cylinder, tandem impulse reaction type, using reheat, and with high-pressure, intermediate-pressure and twin double-flow low-pressure cylinders arranged in line. The operating speed is 3,000 rpm. Each turbo-generator is approximately 41 metres long and weighs 1,200 tonnes.
Boilers
The boilers are tangentially fired, down draught, radiant reheat, single-furnace, single-drum with control assisted circulation. Boiler steam pressure is 16,550 kPa at 565 degrees Centigrade, and steam flow rate is 309 kg/sec.
Cooling Water
Cooling water is required to convert spent steam from the turbines back into water for reuse in the boilers. This water passes through each unit's condenser at the rate of about 16,000 litres/second when the unit is at full output. Salt water is drawn from Lake Munmorah through an inlet canal some 1.8 km long. After being used in the power station, the water is discharged via an outlet canal into Lake Budgewoi. Fresh water for boiler purposes and general station usage is supplied from Wyong Shire Council.
Transmission
The output of each of Munmorah's generators is fed into a 330 kV switchyard via step-up transformers. Here the electricity is fed into three 330 kV transmission lines. Two are connected to Sydney and one to nearby Vales Point Power Station.
Coal Supply
Munmorah was built as a result of a policy of relocating major power stations on the coalfields, at the source of fuel. This has meant considerably reduced fuel costs, enabling Delta Electricity to generate electricity at relatively low costs. Coal is supplied by conveyor from two adjacent underground mines. Coal can be delivered either into the station bunkers for immediate use, or to the coal storage area which can hold a reserve of up to 750,000 tonnes.
|