Wave electric power system

Wave electric power systemIn the one hundred development of wave power is accompanied by a test, the research and exploration.Wave power generating has expanded by beacon light with miniaturization to and the interconnection of electric power system, large scale, by the test to the commercialization of times development, commercialization, and international trade.The world has been recognized by the wave electric is one of the important project, Marine energy development and utilization is clean pollution-free renewable new energy of the main component.The principle of wave power generating mainly converts wave force to the compressed air powered air turbine generator to produce electricity.When the waves rose will top up the air in the air chamber, when it is pressed through a positive pressure water valve chamber into the positive pressure air cylinder and drive on the generator shaft extension end of air turbine generators.When wave drops, indoor air form the negative pressure, make the atmosphere air drawn into the cylinder and drive the generator another shaft extension end of air turbine generators, the direction of rotation is constant.To discharge from the air into the negative pressure cylinder, and then through the negative pressure water valve chamber and get to the negative pressure air chamber.Because of the positive and negative pressure water valve chamber is equivalent to the role of the non-return valve, positive and negative noninterference 2 circuits.The principle of water valve as a non-return valve is to use differential pressure, pressure air can only be one-way traffic.1, durability,It is more important than efficiency.Wave varies with the seasons and time, or even changes in the every month, every day, every hour, a short period of time is able to adapt to change, change for a long time still have difficulty, fatigue damage tolerance and durability of the equipment and service life, is the first problem.2, energy storage,Wave electrical energy storage requirements convenient, cheap, used car battery storage although cheap, but limited capacity;Had better be compressed air energy storage, not only cheap, and suitable for large capacity.3, high efficiencyAlthough is more important than but durability, efficiency is the eternal topic, especially the wave energy conversion efficiency, the potential is still large.4, low costWave electrical equipment is very simple, but its cost is still high.Japan's newest 130 kw equipment, caisson, 600 million, 500 million power generation equipment, a total of 1.1 billion yen.Cost is higher.Calculation shows that the 10 mw wave electricity costs about 17.3 ~ 33.1 yen/kWh, cost is high.But formed the scale, the realization of social, increase capacity, > 10 mw will reduce the cost.5, security,Wave electrical equipment should be able to automatic solution in associated with the storm waves, so as not to overload or damage.The best equipped with damping device to avoid equipment moving, damage.The current wave of power generating equipment is mainly divided into two categories: vibration type vibrates (wave) and the mobile type (translation) wave.Vibration type including water column type, body type, fixed type and movable type and so on four;Mobile type basically is a kind of low head power stations, the use of DAMS and kaplan turbine.Is the development trend of the current water column type, because the development and application of advanced water valve chamber as a check valve, the throttle is commonly used as a non-return valve before, often repeated shocks, easy to damage;Another trend is to develop stationary type breakwater, convenient for construction, and can combine with breakwater, it can be comprehensiveutilization;The third trend is to further reduce the cost.In today's world wave power generating cost basically close to the average electricity price, out of competition, should also continue to further reduce the hard, main is to improve equipment, for Japan, wave can store capacity up to 50 gw, and wave power generating electricity price is several times higher than the ordinary, in terms of price, a long way to go.Waves caused by the wind, but also can cause earthquakes, volcanic eruptions, tsunamis).As for the earth and the moon's gravity caused by the big waves, traditionally has been included in the category of tides.In the thousands of km away caused by storm and passed by a long wave surge;In the wind directly under the action of waves called the wind and waves.Wave is characterized by his great strength, low speed for a few seconds (cycle), low energy flow density, do reciprocating motion without rules.With huge into the wave force, big waves can throw 130 t rock to shore up to 20 m.Wave energy flow density is low, but its transverse effect of high energy density, and distribution of the coastline, is advantageous to the development of high power wave power station.Global wave energy, such as can all converted to electricity, is a year up to 2.365 trillion kWh.When the wave height is 2 m, undulating period of 2.5 s, 24 kw of power.11 s wave height of 3 m, cycle is 130 kw.Waves caused by the wind, but also can cause earthquakes, volcanic eruptions, tsunamis).As for the earth and the moon's gravity caused by the big waves, traditionally has been included in the category of tides.In the thousands of km away caused by storm and passed by a long wave surge;In the wind directly under the action of waves called the wind and waves.Wave is characterized by his great strength, low speed for a few seconds (cycle), low energy flow density, do reciprocating motion without rules.With huge into the wave force, big waves can throw 130 t rock to shore up to 20 m.Wave energy flow density is low, but its transverse effect of high energy density, and distribution of the coastline, is advantageous to the development of high power wave power station.Global wave energy, such as can all converted to electricity, is a year up to 2.365 trillion kWh.When the wave height is 2 m, undulating period of 2.5 s, 24 kw of power.11 s wave height of 3 m, cycle is 130 kw.So far, the world has more than thousand for wave power generating patents, there are more than 20, and with the sea, is more used basically belongs to the following three types: (1) air can - shock wave energy is a kind of kinetic energy (as opposed to using the potential energy of tidal power generation), not directly drives the rotation of the generator power generation, energy conversion must be conducted.And the waves can be converted into the air is a kind of the most widely used, namely the wave impact force air chamber in the air, compressed air drive, pneumatic turbine to drive the generator to produce electricity.(2) mechanical energy - will be through the oil pressure when the waves can be converted into mechanical energy, namely, the wave force impact oscillator oscillator pump oil formation pressure of oil, hydraulic drive motor rotation, and drive the generator to produce electricity.Can (3) water level -- will be inside the basin of the water through the connecting rod mechanism is fixed on the riverbank, and sink float on the surface of the water, after rising sea shock elevated basin, by connecting rod to fold over and put the water in the bucket over into the reservoir dam, repeated work, just like tidal power between reservoir and the surface of the water level difference is used to drive low head generator to produce electricity.。