JPH045475A - Deep sea power storing plant - Google Patents

Abstract

PURPOSE:To simplify the structure and facilitate the inspection and repair by providing a generator disposed in a pressure resisting vessel so as to be driven by rotation of a hydraulic turbine, and a pump disposed in the pressure resisting vessel to send the sea water in the pressure resisting vessel to the out-side. CONSTITUTION:A body facility A is landed on the sea bottom of a deep sea, and generation and storage of electricity are conducted by taking in and out the sea water. At the time of generation, a hydraulic turbine 15 and a generator 16 are rotated by the external high pressure seawater to perform hydraulic power generation, and the seawater is introduced into tank 14. The generated power is sent to a transformer facility on the ground through a generator 18. At the time of storage, a pump 19 is rotated by an electric motor 20 by use of the power from the transformer facility, and the seawater stored in the tank 14 is discharged to the sea which is the outside field. The storing operation is conducted by excess power in the night, and the generating operation is conducted at consumed power peak time in the daytime. Hence, the siting point is never limited, the structure is simple and inexpensive, the inspection and repair are easy, and electric generation can be performed at an extremely high efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a deep-sea power storage plant applied to offshore structures, giant submarines, and the like.

[Prior art] As shown in Fig. 5, a plant that uses seawater to generate electricity stores compressed air in a submarine tank 3, releases the seawater inside the tank 3 to the outside of the tank 3, and discharges the seawater in the tank 3. A method is being considered to generate electricity using the energy that is generated. FIG. 6 shows a different example of a power plant based on substantially the same idea as above. Another power generation plant, as disclosed in Japanese Unexamined Patent Publication No. 55-47498, is one in which equipment for power generation is provided inside a pressure-resistant shell submerged in the sea.

In addition, seawater pumped storage power generation that takes advantage of the difference in altitude between the sea and the mountains is about to be put into practical use.

[Problems to be Solved by the Invention] Among the above-mentioned conventional techniques, the method of sending compressed air from the sea into the submarine tank 3 as shown in FIG. 5 is limited to a location or a relatively shallow sea area.

Another drawback is that the air or seawater sent into the submarine tank 3 is cooled, reducing pressure and reducing efficiency.

Furthermore, the power generation equipment and equipment disclosed in the above-mentioned publication are large-scale, and the structure of the equipment is complicated, making inspection and repair difficult.

Furthermore, in the case of seawater lift power generation that takes advantage of the difference in altitude between the sea and a mountain, there are concerns that the seawater stored on the mountain side will have a negative impact on the natural environment. In addition, pumped storage power generation uses long pipes and Francis-type water turbines, so its efficiency is low, at around 60% at most.

Therefore, the object of the present invention is to have a structure that is not limited by location, does not require long pipes like pumped storage power generation, is simple and inexpensive, is easy to inspect and repair, and is extremely An object of the present invention is to provide a deep-sea power storage plant that can generate power with high efficiency and has little risk of adversely affecting the natural environment.

[Means for Solving the Problems] In order to solve the above problems and achieve the objectives, the present invention takes the following measures.

A pressure vessel having a seawater inlet/outlet; a water wheel provided within the pressure vessel and driven by the seawater flowing into the vessel; and a generator installed within the pressure vessel so as to be driven by the rotation of the water turbine. and a pump installed inside the pressure vessel so as to send seawater inside the pressure vessel to the outside.

U action As a result of taking the above measures, the following effects occur.

Since it uses water pressure in the deep sea, it is not limited by location. In addition, since it generates hydroelectric power using a water wheel, it has a simple structure and is extremely easy to inspect and repair.

Also, because it is installed in the deep sea, it has little negative impact on the natural environment. In addition, by adopting a Pelton type (efficiency 99.8!?6) for the water wheel and a reciprocating type (90% efficiency) for the pump, the 90% efficiency could not be obtained with pumped storage type etc.
It is possible to obtain close overall efficiency.

[Embodiment] As shown in FIG. 1, a plurality of structural equipment A (AI, A2.A3.A4°, etc.) for forming a huge space under the sea are arranged along the seabed. Inside the framework equipment A, power generation equipment and power storage equipment are provided, as will be described later.

Substation equipment is installed on the ground, and it is connected to the main building GA using a submarine cable. The following operations are performed on the building frame equipment A1, the power generation installation 1iiiB, and the power storage equipment C according to instructions from the substation equipment (i) iD.

■Operations for submerging and surfacing the frame structure QA.

■Opening/closing and adjusting control valves during power generation.

■Opening/closing control valves and operating pumps, etc. when storing electricity.

As shown in FIGS. 2 to 4, the frame equipment A includes a main shell 11, a balance tank 12. Counterweight 13, tank 1
It consists of 4 power generation equipment B and power storage equipment C.

The main shell 11 has an SC (steel concrete) structure in which inner and outer steel plates 11a and 11b are made of steel plates such as diapers, and are filled with concrete 11c to withstand the pressure from seawater in the deep sea. do. The balance tank 12 is mainly used for diving, floating, and balancing the structural equipment A. counter weight 13
is provided at the lower part of the main shell 11 as a load for maintaining posture, and R
It consists of C (reinforced concrete) structure. The tank 14 is a space that stores seawater.

Power generation facility B uses high-pressure seawater introduced in the deep sea to rotate a water turbine 151 and generator 16 to generate electric power, and transmits this electric power to substation faD via a transformer 18.

Seawater that has passed through the water wheel 15 is stored in the tank 14. Note that the water wheel 15 used is a Pelton type.

The power storage equipment C uses the power supplied from the substation equipment,
One pump is rotated by an electric motor 2o, and the seawater in the tank 14 is drained to the outside world via the drain pipe 21. 22 is a control valve, and 23 is a water supply and drainage pipe.

Note that the piston is prevented from moving faster than the speed at which the seawater in the tank 14 enters the cylinder of the pump 19 to prevent cavitation from occurring.

For inspections and repairs, the main equipment A will be floated, the mother ship equipment S shown in Figure 1 will be brought alongside, and periodic inspections and repair work will be carried out at sea.

Next, the general operation of the plant with the above configuration will be explained.

(1) Structure construction (IifA) After landing on the bottom of the ocean floor E, seawater will be pumped in and out to generate and store electricity.

(2) During power generation, high-pressure seawater from the outside world rotates the water turbine 15 and the generator 16 to generate hydroelectric power, and the seawater is introduced into the tank 14 . The generated power is transmitted to the transformer fiD via the transformer]8.

(3) When storing electricity, the pump 19 is rotated by the electric motor 20 using electric power from the substation equipment, and the seawater stored in the tank 14 is discharged into the sea, which is the outside world.

(4) The above-mentioned power storage operation is performed using the surplus power at night, and the above-mentioned power generation operation is performed during the daytime power consumption peak.

According to this embodiment, it is possible to arbitrarily manage large amounts of electric power, such as storing power when power demand is low and generating power when power demand is peak. In addition, since there are no long pipelines like in conventional pumped storage power generation, the overall efficiency has been reduced from about 60% to about 30%.
It is possible to increase it to almost 90%. Furthermore, since the overall structure is simpler than conventional pumped storage power generation, construction costs and costs for repairs and inspections can be significantly reduced. Also, there is a great deal of freedom in terms of location.
Moreover, since it only utilizes the pressure of seawater in the deep sea, the negative impact on the natural environment can be reduced.

Note that the present invention is not limited to the embodiments described above, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[Effects of the Invention] According to the present invention, there is no restriction on the location, the structure is simple and inexpensive, and inspection and repair are easy. Furthermore, it is possible to provide a deep-sea power storage plant that can generate power with extremely high efficiency and has little risk of adversely affecting the natural environment.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram of the present invention, FIG. 2 is a longitudinal cross-sectional view of the structural equipment, FIG. 3 is a cross-sectional view of the structural equipment, and FIG. 4 is a horizontal cross-sectional view of the power generating equipment portion. FIGS. 5 and 6 are diagrams showing conventional examples. A...Structure equipment, B...Power generation equipment, C...Power storage equipment, D...Transformation equipment, E...Undersea, K...Undersea cable, S...Mother ship equipment.

Claims (1)

[Scope of Claims] A pressure vessel having a seawater inlet/outlet; a water wheel provided within the pressure vessel and driven by seawater flowing into the vessel; A deep sea power storage plant, comprising: a generator installed therein; and a pump installed inside the pressure vessel to send seawater inside the pressure vessel to the outside.