[Harriet J] Writing Practice Test 561200

The given diagrams illustrate how does a wave-energy machine look like and work, as well as its location options in reality.

It is noticeable that the wave-energy machine makes use of wave energy to generate electrics. Besides, the particular installation locations of the machine under the sea will also influence the effectiveness of the amount of energy released.

According to the first diagram, there are two main chambers inside the gadget, the lower chamber allows water to pour in with an open-entrance in the wave-in side. While the sea level lifts up, the air is pushed out into the upper chamber due to the high pressure. Air flowing will then rotating the propellers which leads to the operation of the turbine. When the turbine is turning and producing electrics, the air will also escape from the machine via a cavity on the top, the air that comes back to the upper chamber through a counter cavity wil press the water level down and keep the cycle on repeating.

Looking at the second illlustration, the more far landwardside the wave-energy machines are, the stronger the wave is which makes the turbine rotation release more power. So it is more effective to install these machines far from the mainland, but as far as they are, as expensive costs for the installation fee