Generate electricity from wave power

The diagrams show a structure that is used to generate electricity from wave power.

Write a report for a university lecturer describing the information.

  These two diagrams show a construction that allows electricity to be generated from wave power.

The structure is usually built by the sea on the side of the cliff or sea wall and consist of three main parts : a large chamber ,a vertical column and a turbine. The bottom end of the chamber is open to the sea and lets water in.The upper end is connected to the column, which is closed on the top. The turbine is installed inside the column and enables the generation of the electricity in two phases.

The first diagram shows how a wave comes into the chamber and push air in front of it in to the column.This current of air causes the turbine to turn ,hence electricity is generated.

The second diagram illustrates the next part of the process when wave retreats.The low water level decreases compression in the chamber ,so the air is sucked out of the column and turns the turbine again.As a result ,electricity continues to be produced.

In conclusion,we can see that this structure is useful as electricity is generated in both phases : entering and retreating of water.

A lock

 

 These three diagrams show the movement of a boat along a canal over a lock.

The process involves a structure which is built on the canal to let boats move from one water level to another.The construction consist of two identical gates and a large section of the canal to take one or more boats.The gates have valves,called ‘paddles’ which are used for lowering the water level in the lock.

The diagrams illustrate that when the upper gates are open the boat moves into the space between the gates.Then, the upper gates are closed and the ‘paddles’ are opened and as a result, the water level decreases.When level inside the section and behind the lower gates are equal,the last gate is opened.And the boat can leave the lock.When the boat moves in the opposite direction from lower to upper water level,the lower gates are opened first. The boat comes into the section between the gates and they are closed behind boat.The ‘paddles’ of the upper gates are opened,so after some time levels behind upper gates and inside the section become identical.Then the upper gates are opened and the boat moves out of the lock.

In conclusion,we can see that this structure is useful for moving boats along canals with different levels of water on both sides:upward and downward.