Controlling the hurricane – reduction of storm damage
When the EMU devices, as presented in the main animation on the hom page, are circling the eye of the hurricane in its strong side winds, it is possible to reduce the destructive power of the storm and also, to some extent, influence the path of the eye of the hurricane by using a large number of devices. In order to do this, the computers of the EMU devices need to receive the necessary coordinates from the control center via satellite. These coordinates can also be pre-progranned on the databases of the devices. Following the coordinates the computers then steer the armada of the EMUs clear of the places that we wish to protect from the hurricane.Obviously, the necessary computer softwares must first be created, following the ideas presented below.
- Since the exact location of the hurricane is difficult to predict in advance, the device based on the present invention is designed to float freely, moved about by the storm winds.
- The device is, however, aware of its environment at all times, and is in this sense autonomous.
- Via satellites, this unmanned device can anticipate possible dangers and intelligently seek the optimal location during the storm by using its motors.
- The device is equipped in a way that allows it to take advantage not only of wind energy, but also of the potential and kinetic energy of waves.
- The optimal power output of the generators is controlled through a continuous, automatic fine-tuning of the computers.
- The generators are placed on the main shaft, and the computers can instantly make them operate also as motors.
- By changing the power output of the generators, we can adjust the EMU´s braking force.
- The most effective way to bring the device into a halt is to use the motors.
- The rotational speed of the device is controlled by adjusting the power output of generators / engines by means of computers and the eccentric counterweights.
- If necessary, the EMU device can also be called off from the area of the hurricane for maintenance, emptying, or refill.
- Beeing self-steering, the EMU device is able to perform evasive maneuvers in critical situations.
- The idea based on the EMU device has not jet been fully developed.
After the hurricane, the EMU devices are tied into long chains, which are then towed closer to the next storm by maintenance ships. At the same time any damaged EMUs could be brought in for repair. The device is able to move without such outside help. Using ships, however, is more cost-effective and make it possible to perform the necessary maintenace procedures.
Reduction of the storm damage
In the diagram on the left, the EMU devices are marked with blue line. The diagram reprecents a fleet of EMUs recovering energy symmetrically from the strong side winds of the hurricane eye.
The fleet is programmed to go round the center of the eye of the hurricane in a virtually circular motion. In this case, the wind blows almost perpendicularly against the airfoils of the EMU, which means that the device operates at its optimal level all the times.
This way EMUs can best reduce the force of the hurricane, and produce energy, but cannot really impact where the hurricane is going. If we wish to have an effect on the path of the hurricane, we need to apply asymmetrically resistance to the eye of the storm.
Controlling the hurricane with an asymmetrical movement of the EMU devices
In the adjacent diagram energy is recovered asymmetrically from the edges of the eye of the hurricane. The EMUs (blue lines) are centered to travel along one edge (A) of the eye of the hurricane and operates there at maximum output. In other words, the aim is to prevent the movement of air as effectively as possible. This will result in a reduction of the kinetic energy of air, i.e. the energy of the hurricane, on the edge (A).
When leaving the edge of the eye, the EMUs will be in favorably position in the area (E). There the wind hits EMUs diagonally, with the aim moving the air mass closer to the eye of the storm. As wind speed has decreased slightly at the edge (A) of the hurricane eye, it has also decreased in area (D), which means that the air mass is subject to a smaller centrifugal force in area (D). Because of this, the air mass tends to turn closer to the hurricane eye than it normal does. This phenomenon is enhanced by the pressure gradient formed between areas (E) and (D).
As the air mass moving along area (D) reaches area (B), its speed begins to increase towards normal, because in the area (B), the wind is allowed to blow freely. – This will be done by steering EMUs to circle the hurricane eye further away, as shown in the diagram.
At some stage, the EMUs are redirected closer to the edge of the hurricane eye. In area (H) the wind again hits the devices diagonally, tending to move the air mass further away from the hurricane eye. This will cause a slight underpressure between area (H) and the hurricane eye.
From point (C) onwards, the EMUs will be set to convert energy into electricity at maximum power.
This will cause a slight overpressure to point (C). The pressure gradient forming in areas (B), (C) and (H) will guide the air mass moving along the edge (B) of the hurricane eye to continue its travel straight ahead, aided by the inertia of its mass.
In other words, the air mass tends to circumvent the overpressure front that has formed in point (C). This is facilitated by the overpressure caused by area (E) and the reduced air speed in areas (A) and (D).
As a result, the hurricane eye tends to move, and the combined effect of the forces affecting the hurricane eye’s location is estimated to be as indicated in the image by the red arrow. Here you can have a closer look at these calculations!
Estimating the duration of the storm
When EMUs are in operation, the friction caused by their rotation warms up seawater. At present, the efficiency of the devices seems rather small, meaning that the heating effect on seawater may be substantial.
Since water temperature is a significant factor in the birth of a hurricane, this rise in the temperature of seawater could be conceived to prolong the duration of the hurricane.
However, a prolonged duration of the storm would reduce and even out its the peak strength, resulting in less damage to the environment.
On the other hand, the warming up of seawater due to the EMUs would affect the way the hurricane moves. In the future, we will probably learn to make better use of this.
The idea is to affect the course of the hurricane so that energy can be derived from it for as long as possible, by directing the eye of the storm to ocean areas which are suitable for energy production. Another goal is to avoid economic damage.