The diagrams below show the design for a wave-energy machine and its location. Summarise the information by selecting and reporting the main features and make comparisons where relevant.

The figures above describes how a wave-energy device produces power and introduces a couple of models which have different manufacturing price and settlement position. As can be seen from the picture, this equipment generates power by a combination of wave and air movements, through a complicated system includes a range of separately fuctioned sections. In terms of operational structure, the device consists of two levels. The lowest level is built halfly under the water so that the wave can go inside and creating wind from its movements. On this room’s ceiling, two doors were created, the left one is totally opened so that the air can be blown up to the second floor and a ventilation was built on the right as a path of the wind comes from the upper room. On the second floor, which is put above the water level, a double turbine device was set exactly at the middle of the room and divides it into three parts: two separated rooms in the same size on the left, each contains one turbine engine and another chamber is on the right, in which both turbines are fuctioned. In contrast with the first floor’s ceiling, the ventilation was set on the left to get the wind from outside while an opened door is on the right to expel the air. When the wind of the first floor blows to the large room on the second floor, the lower turbine is moved, while the air from outside goes from the upper small room to the chamber then flies down to the first floor and moves the higher turbine. In general, the stronger the wave is, the stronger the wind is and it will create much power to form electrics. Therefore, it is more efficient if the wave-energy device is settled far from the coast to get bigger wave. Nonetheless, it means the equipment must have a big and solid foundation, which needs very large budget.