Annapolis Royal Tidal Generating Station By: Melissa Bullen.

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Presentation transcript:

Annapolis Royal Tidal Generating Station By: Melissa Bullen

Some Facts In 1980, construction began on a small island in the mouth of the Annapolis River. After four years of construction this station was completed. It has the largest straight-flow turbine in the world. It generates more than 30 million kilowatt-hours of electricity per year, enough for 4500 homes.

How it works The station generates power by allowing the incoming tide to fill the head pond through the sluice gates. When the head pond reaches its maximum level the sluice gates are closed, trapping the water in the head pond. The gates control the flow of the water through the turbine. When the gates are open water flows through and turns a massive four-blade runner. The power generating phase lasts for approximately five hours, at which time the gates close and a new cycle begins. This is repeated twice daily.

Diagram 1

Diagram 2 One of the unique features is a huge four- blade propeller turbine or "runner". Its 7.6 m in diameter making it the largest of its kind in the world by 4m. The 148 tonne turbine can generate 20 megawatts at top speed.

More tidal generating stations in the Bay of Fundy? Larger projects with tidal power have been considered in the Bay of Fundy, but more information about possible effects to the area and environment is needed. The main concerns being effects on fish populations and the filling in of the head pond with sediment.

The End By: Melissa Bullen