However, in this regard there is an important distinction from the prior art methods in that prior art generators had to be specified for average conditions, whereas with the invention the generator can be specified to work efficiently at much higher wind speeds or wave heights, so that it becomes necessary to envisage energy dumping only on rare occasions. On the other hand, since strong winds and high waves do happen, however infrequently, special measures are required to protect the installation, largely because the electric generator, if it is designed for average wind conditions or for normal waves, cannot absorb the very much higher power levels in high winds or waves.
At the second speed, therefore, the power absorbed by the pumps will be eight times that at the said first speed, because each of the pumps is absorbing twice as much power as the single pump not by passed at the first speed. Of course it may be desirable to have a speed range in which the maximum speed is greater than twice the minimum speed, and this will be accommodated by having some planned loss of efficiency at the very lowest speeds, and by the provision of an excess energy dumping arrangement at the high end of the range. For example, there may be four such similar pumps driven by the wheel at substantially equal speeds, of which three are by-passed (so as to run substantially free of torque) at a first wind speed at the lower end of a given range, and none is by-passed at a second wheel speed approximately twice the first speed at the upper end of said speed range.
The 5 KW mains energised induction generator 31 can be connected directly to the mains whereby to feed power thereto (through the consumption meter, driving it in reverse) whenever a locally connected load consumes less than the constant (but intermittent) 5 KW output, because the generator can be run at synchronous speed with the mains and at an equal output voltage, and no power factor problems arise. The operation will, of course, be intermittent. So the gear pump arrangement 17 already matches the fixed pitch wind wheel and allows substantially maximum efficiency operation across the whole speed range. At very high wind speeds, or in the event of a malfunction, or for maintenance purposes, it will be necessary to stop the operation of the apparatus altogether, and brakes 36 are provided in the pump drive which can be operated manually or automatically from the speed transducer 18 in the event of overspeeding or by another safety circuit in the event of other malfunction.
Tipos De Dolor Dental
DESCRIPTION OF THE PREFERRED EMBODIMENTS The apparatus illustrated in FIG. The present invention provides a method and apparatus for wind power generation in which this last mentioned disadvantage can be eliminated, and in which many other disadvantages are avoided or substantially reduced. Other types of wind wheel have mechanisms, which can be automatic, for adjusting the angle of attack of the blades, and, of course, the friction brake is often resorted to.
- A generator connected to the impeller
- Sensación de que el alimento se detiene en el esófago, dificultad para tragar
- Un lunar nunca debe doler, ni inflamarse, ni mucho menos sangrar
- La repulsión
- El sésamo negro y la hipertensión arterial
- Primeros auxilios en adultos mayores intoxicados
- Respiración dificultosa
- Para terminar, sírvelo recién preparado, sin colar
It may well be arranged for example that at a wind speed of 10 mph (16 kph) the pump 17a only is on torque, but at 20 mph (32 kph) all four pumps are on torque. The power output of a fixed pitch wind wheel whose tip speed is proportional to wind speed–the condition for maximum efficiency over the operating range–is proportional to the cube of the wind speed. SUMMARY OF THE INVENTION The invention comprises a method for generating electricity in which a non-uniformly operating energy source such as wind or water waves drives a rotary electric generator, characterised in that energy from the source is accumulated in intermediate form and converted into kinetic energy driving the generator at constant power when the amount of accumulated energy exceeds a predetermined value. This invention relates to the generation of electric power from non-uniformly operating energy sources such as wind, or water waves.