Technical structure of the EMU
Side and end view diagram of the EMU
The proposed EMU device includes a hull structure (10) that has been designed to float freely on the water, and the equipment (11) used to convert the energy derived from the centre of the hurricane into electrical energy and further into a third energy form. The equipment for producing the third energy is not included in the diagram.
The structure of the hull is stems from the structure of an enclosed ellipsoid of revolution, where the ellipse has rotated around its long axis. This structure is rotated mainly by wind power with the help of the aerofoils (12) installed on the side of the ellipsoid. The ideal direction of the EMU´s axis of rotation is essentially parallel to the water sufice and in a right angle to the direction of the wind.
The hull structure is composed of two nested structures, of which the outermost structure (14) is designed to rotate while the inner structure (13) does not. In other words, only the shell-like outer structure equipped with airfoils rotates. The inner structure also includes the main shaft (15) located at the axis of rotation. Essentially arranged on the main shaft are the counterweights (16) that keep the inner structure from rotating. The main shaft also has the appropriate bearings and their mountings (not included in the diagram), which allow the mutual rotation of the nesting structures, thereby enabling the rotation of the ellipsoid in all its positions.
The actual energy production in the EMU is done by electric generators (17) mounted in the inner structure. Through the eccentric counterweights (16), the Earth’s gravity keeps in place the rotors (18) mounted on the main shaft (15). Respectively, the stator (19) is connected to the outer structure (14). This way the electric generators can simply be supported on the main shaft. The maximum power of the electric generators can be adjusted altering weight and positioning of the counterweights. The efficiency of the device can be influenced by modifying the weight of the entire device and the configuration of the aerofoils.
Storing or transferring electrical energy during a hurricane weather is problematic. For this reason the electrical energy is converted inside the device (10) into third energy. The equipment also includes the necessary technology (not included in the diagram) for manufacturing and storing this third energy form.
The EMU’s electric generators have been designed to be used also as electric motors. By means of these and other motors (23) placed inside the EMU, the device can be moved on the water and transferred from place to plase even when there is no wind. The EMU is moved by rotating the eccentric counterweights on the main shaft (ie. lifting the weighs to one side and holding them there) by using the above mentioned motors (17 and 23), hence rotating the outer structure of the EMU. The inner structure also features smaller electric motors (not included in the diagram) that can be used for carrying out different tasks related to steering of the EMU.
Controlling of EMU
The course of the EMU can be altered, mainly with help of the wind, by adjusting the sail surfice areas with the steering equipment (22), and with the power of the generators and the motors. When the EMU is in its ideal horizontal position and the longitudinal axis is perpendicular to the wind, the wind presses evenly on the device (10) and the aerofoils (12) above the surface of the water. In this case, the EMU rotates and travels straight forward in the direction of the wind.
The course is altered by adjusting the center of mass of the device by means of the adjustment weights (21) in the axial direction of the axis of rotation. One end of the ellipsoid will then sink deeper while the other one rises. The force of the water decelerating the movement of the sinking end increases, while the sail surface area decreases. Conversely, in the mounting end the sail surfase area increases, while the decelerating force of the water decreases. The mounting end is then pushed forward more easily by the wind, whereupon the course of the EMU changes. In addition, by increasing the output of the generators (braking) we can enhance the EMU´s turning. On the other hand, increasing the EMU´s rotation speed by using speed the motors has the opposite effect as this slows down the device´s speed of turning.
Alternatively, the EMU can be controlled by making one or several movement joints (20) on its hull structure, thereby dividing the structure (10) to two or more movin parts along the axis of rotation, i.e. the main shaft. These parts can rotate independently of each other. Each part has its own funktioining generator/electric motor (17) including the counterweights (16). This enables the parts of the outer structure of the EMU to rotate at different speeds, and even in different directions. As a result, the controlling and adjustingof the EMU becomes considerably easier. However, it also means that the device is more prone to breakages.
The EMU can be controlled also by adjusting the output of the device’s generators/motors (17). Increasing the capacity for electricity production decelerate the rotation of the EMU, thus acting as break. This slows down the speed of the EMU. Correspondingly, decreasing the capacity for electricity production facilitates the rotation of EMU, thus increasing its speed with respect to water.
EMU is controlled by computers
All of the functions described above can be controlled by computers. By using satellites or other such means, the EMU either places itself in the optimal spot or is placed there unmanned by a control center. By means of for example satellite positioning, nautical charts, inertial devices, radar, meteorological information, as well as through computer software, the EMU can also anticipate the potential safety hazards, such as hitting land or colliding with the other devices.