Page 34 - Curriculum Visions Dynamic Book
P. 34
Some water escapes as steam.
Cooling tower
Air cools water.
Hot water from power station
(Left) The high thermal capacity of water is used extensively in cooling systems for power stations. They also use the property that as water changes state from liquid to solid, it absorbs large amounts of heat energy. In the cooling towers the water condenses again, releasing heat to the atmosphere.
Waste gases
Chimney stack
Mill grinds coal to dust.
Hot water falls over slatted frame.
Electricity
Power station
Turbine Generator
Heated water
Cooled water
Burning coal dust and air
Reinforced concrete containment building
Steam
(Above) Water is used as a cooling system in thermal power stations.
(Right) Water is used for cooling in nuclear power stations. In this case
the water has to remain contained for safety reasons.
Heated fluid used to boil water in the steam generator
Steam from turbines is condensed by water cooled in cooling towers.
Electric generator containing turbines driven by steam
Reactor
Pump circulates coolant.
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