JPH07172394A - Hydraulic power generation method for ship - Google Patents

Abstract

PURPOSE:To generate power energy for a ship more than fuel energy consumed for generation. CONSTITUTION:Water flowing in an intake SIN passes an effective intake area S1, assumed at the inside and outside of the opening of the intake, at the sailing speed Vm per a second of a ship and flows in the intake. Water discharged through a discharge port SOUT flows through an effective discharge are S2, assumed at the inside and outside of the opening of the discharge port, at a speed Vm per a second and is discharged through a discharge port. A ship set at S1 S2V is sailed at a sailing speed Vm per a second, a quantity of water equivalent to S1V flows in a pressure pipe 3, a reaction water turbine 4 is rotated by the water, and a generator 5 is operated through rotation of the reaction water turbine 4 to effect hydraulic power generation. By discharging water after generation in water by suction output generated by water flowing from the discharge port SOUT through the vicinity thereof at a speed Vm per a second, movement energy produced by water flowing in the pressure pipe 3 and position energy of water produced by a difference between the intake SIN and the discharge SOUT is utilized for hydraulic power generation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power generation method for ships, and more particularly to a hydroelectric power generation method for ships.

[0002]

2. Description of the Related Art In a conventional power generation method for a ship, an engine is operated, and the rotation of the engine rotates a generator to generate power.

[0003]

Therefore, in the conventional power generation method for a ship, the fuel for the amount of energy obtained by adding the loss of the engine and the loss of the generator to the energy of the generated electric power is consumed. There is a problem that it is not suitable for the current era where there is no gain of, and energy saving is required.

An object of the present invention is to solve the above-mentioned problems and to provide a hydroelectric power generation method for a ship, which can obtain electric power energy more than the fuel energy consumed by the ship for power generation.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a method of hydropower generation for a ship according to the present invention includes a pressure pipe for hydropower generation and a pressure pipe for hydropower generation in a hull of a ship traveling on water or underwater. Is also provided with a reaction turbine and a generator that use a large proportion of the flow velocity, and the intake of this pressure pipe is arranged so as to open toward the traveling direction at a position near the water surface of the outer surface of the hull below the water surface of the ship, The discharge port of this pressure pipe is arranged below the water intake port and on the outer surface of the hull near the stern or below the hull so as to open in the direction opposite to the traveling direction. The vehicle travels at Vm, and the amount of water corresponding to the cross-sectional area S _IN of the opening end of the intake port and the traveling speed Vm of the ship is taken from the intake port, and the reaction turbine is rotated by this water. After driving the car to hydropower and using it for hydropower Water is discharged from the discharge port into the water by the suction force of water passing through the discharge port in the vicinity of the discharge velocity at a flow velocity corresponding to the traveling speed of the ship per second Vm, so that the water flows into the intake port according to the second speed Vm. The kinetic energy of the water discharged from the discharge port and the energy at the position between the intake port and the discharge port are used for hydroelectric power generation.

Further, in the hydroelectric power generation method for a ship of the present invention, the opening end sectional area S _IN of the water intake and the opening end sectional area S of the discharge port are provided.
And _OUT is substantially _equal, it is preferable that the _{S IN} V ≒ _{S OUT} V.

Further, in the hydroelectric power generation method for a ship according to the present invention, the opening of the intake port is enlarged from the inside toward the opening end, and the water flowing into the intake port is opened at the opening end of the intake port. The effective water intake area S ₁ assumed inside and outside is passed at a traveling speed Vm of the ship to flow into the water intake, and the opening of the outlet is enlarged from the inside toward the opening end,
The water discharged from the discharge port has an effective discharge area S ₂ that is assumed to be inside and outside the opening end of the opening of the discharge port.
S ₁ V ≈ S ₂
V is preferable.

[0008]

The hydroelectric power generation method for a ship according to the present invention is
A hydroelectric power generator (a pressure pipe for hydroelectric power generation and a reaction turbine and a generator that use a flow velocity more than a hydraulic pressure for a large proportion) is provided, and the water used by the provided hydroelectric power generator is supplied at a speed V per second of the vessel.
Using m, the kinetic energy of water flowing in from the intake port of the pressure pipe arranged so as to open in the traveling direction at a position near the water surface on the outer surface of the hull below the water surface {(1 /
2) × S _IN × V × V ² kW}, and the water that has been used for hydroelectric power generation is below the intake port and below the intake port, and on the outer surface of the hull at a position closer to the stern or below the hull, in the opposite direction to the traveling direction. The suction power of water passing through the discharge port near the discharge port at a flow velocity corresponding to the traveling speed Vm of the vessel Vm from the discharge port (the energy of the suction power is the energy of the motion of water {(1 / 2) × S _OUT × V × V ² kW} and the energy at the position of water {9.8 × S _OUT × V × H kW}. ] The energy of the water position due to the drop H between the intake port and the discharge port generated by
_IN × V × HkW} is used for hydroelectric power generation.

In this case, in addition to the water resistance corresponding to the traveling speed Vm in a normal case where there is no water intake and discharge port in the ship and no hydroelectric power generation, water resistance to the intake port and the discharge port, The resistance due to the anti-traveling direction component of the pressure applied to the hull by the water used for hydropower generation in the pressure pipe via the pressure pipe and the reaction turbine is added.

In order to counter the above-mentioned added resistance, in order to maintain the traveling speed Vs of the ship Vm, the fuel energy additionally consumed by the propulsion engine of the ship in the normal case is separately used and the engine is used. The energy of the generated power when the generator is rotated by this engine to generate electric power is the energy that can be used for the above-mentioned hydroelectric power generation [water kinetic energy {(1/2) × S _IN × V × V ² kW} + energy of water position {9.8 × S _IN × V × HkW}] is smaller or larger than the energy of the generated electric power generated by hydroelectric power, and whether this hydroelectric power has an energy gain. It is decided whether or not there is.

First, regarding the intake port and the discharge port, water flows into the intake port at a flow velocity corresponding to the traveling speed per second Vm of the vessel, and water flows from the outlet at a flow velocity corresponding to the traveling speed per second Vm of the vessel. Since the water is discharged, there is no decrease in the flow velocity in these parts, and the resistance of water to the intake and the discharge is small and can be ignored.

Next, regarding the resistance due to the anti-traveling direction component of the pressure applied to the hull by the water used for hydroelectric power generation in the pressure pipe through the pressure pipe and the reaction turbine, the shape of the bent portion of the pressure pipe and the resistance of the pressure pipe It is necessary to design so that the flow velocity decrease due to the change of the inner diameter is small, and the reaction turbine must be designed to be, for example, a propeller turbine so that the ratio of utilizing the flow velocity to the hydraulic pressure is as large as possible. Although it is difficult to accurately obtain the energy of the anti-traveling direction component of the resistance that occurs when these considerations are given sufficiently, at most 15% of the energy that water used for hydroelectric power generation has
It is a degree. Propulsion factor of ship's screw is at least 5
0%, against the added resistance above,
The maximum increase in the output of the propulsion engine of the ship for maintaining the traveling speed Vm of the ship is about 30% (15% ÷ 0.5) of the energy of water used for hydroelectric power generation. The maximum amount of power generated by rotating the generator with this 30% energy is about 25.5% (30% x 0.8) of the energy of water used for hydropower generation.
5).

Since the energy of the power generated by the hydroelectric power generation by the method of the present invention is about 85% of the energy available for the hydroelectric power generation, the output of the propulsion engine of the marine vessel is increased to maintain the traveling speed Vm of the marine vessel. It is about 3.3 times (85 / 25.5) compared to the case where the generator is directly operated in minutes.

Further, in the hydroelectric power generation method for a ship according to the present invention, the opening end sectional area S _IN of the water intake and the opening end sectional area S of the discharge port are provided.
_{If OUT} is made approximately equal and S _IN V ≈ S _OUT V, a continuous equation of fluid is established for the water flowing into and discharging the pressure pipe when the flow velocity at the intake port and the discharge port determined by the ship shape are equal. The water flowing into the pressure pipe can be used without waste.

Further, in the hydroelectric power generation method for a ship according to the present invention, the opening of the intake is enlarged from the inside toward the opening end so that the water flowing into the intake is the opening end of the opening of the intake. The effective water intake area S ₁ assumed inside and outside is passed at a traveling speed Vm of the ship to flow into the water intake, and the opening of the outlet is enlarged from the inside toward the opening end,
The water discharged from the discharge port has an effective discharge area S ₂ that is assumed to be inside and outside the opening end of the opening of the discharge port.
S ₁ V ≈ S ₂
If V is set, even if the flow velocity at the intake port and the discharge port determined by the shape of the hull are not equal, the equation of fluid continuity is established for the water flowing into and discharging the pressure pipe, and the water flowing into the pressure pipe is used without waste. it can.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A ship hydroelectric power generator using an embodiment of the ship hydroelectric power generation method of the present invention will be described with reference to FIGS.

1 and 2, in a hull 2 of a ship 1 traveling on a water surface 6 at a traveling speed of Vm per second, a pressure pipe 3 for hydraulic power generation and a propeller turbine (a propeller turbine is compared to a Francis turbine). This is suitable because the rate of using the flow velocity is larger than the water pressure.) 4 and the generator 5 are provided on both port sides near the bow, and the intake port S _IN of the pressure pipe 3 is located on the outer surface of the hull below the water surface of the ship 1. Is arranged so as to open toward the traveling direction at a position close to the water surface, and the discharge port S _OUT of the pressure pipe 3 is below the water intake port S _{IN of the} outer surface of the hull below the water surface of the ship 1, and The intake S is arranged at a position closer to the stern than the intake S _IN so as to open in the direction opposite to the traveling direction (the depth from the intake S _IN to the outlet S _OUT is Hm). _{As the IN} opening approaches from the inside to the opening end, Increase Te, water flowing into the intake S _IN is, through the effective intake area S ₁ which is assumed to the open end and out of the opening of the water intake S _IN at running speed per second Vm of ship intake S _IN so as to flow into the opening of the discharge port S _OUT by increasing as approaching from the inside to the open end, the water discharged from the discharge port S _OUT is effective discharge assuming the open end and out of the opening of the discharge port S _OUT The area S ₂ is passed at the traveling speed Vm of the ship and discharged from the discharge port S _OUT so that S ₁ V ≈S ₂ V is always established.

When the ship 1 travels on the water surface 6 at a traveling speed of Vm per second, the flow velocity of water flowing along the outer surface of the hull below the water surface is generally partially different depending on the shape of the hull 2 below the water surface. Flow velocity into outlet S _IN and outlet S
The flow velocities of the water flowing in the vicinity of _OUT are the speed V _IN and the speed V _OUT which are different from the traveling speed Vm of the ship 1 and the speed Vm. However, as described above, the opening of the water intake S _IN is
Increasing the size from the inside toward the open end, the intake S
_The water flowing into the _IN has an effective water intake area S ₁ which is assumed to be inside and outside the opening end of the opening of the water intake S _IN , and the traveling speed V
passes in m so as to flow into the intake S _IN, the opening of the discharge port S _OUT by increasing as approaching from the inside to the open end, the water to be discharged from the discharge port S _OUT, discharge outlet S
Effective discharge area S assumed inside and outside the opening end of _OUT opening
₂ at a traveling speed of the ship Vm of ₂ seconds and the outlet S _OUT
If it is discharged from S, it is possible to always establish S ₁ V ≈ S ₂ V regardless of the outer shape of the hull below the water surface. If S ₁ V ≈ S ₂ V is always satisfied, even if the flow velocity at the intake port and the discharge port determined by the hull shape are not equal, the equation of fluid continuity is established for the water flowing into and discharged from the pressure pipe. The water flowing into the pipe can be used without waste.

In this embodiment, the traveling speed of the ship is 8 m / s.
(Approximately 15 knots) S ₁ ≈S ₂ = 5 m ^{2 Since} the head between the intake S _IN and the outlet S _{OUT is} 5 m, if the power generation efficiency is 85%, the hydroelectric power generation capacity = [water motion energy {(1 / 2) 5 x
8 × 8 ² kW} + energy of water position {9.8 × 5 × 8
× 5kW}] × 0.85 = 2754kW Power generation capacity when the propulsion engine of the ship directly operates the generator by using the additional power to maintain the traveling speed = [Energy of water kinetics {( 1/2) 5 × 8 × 8 ² k
W} + water position energy {9.8 × 5 × 8 × 5k
W}] × 0.255 × 0.85≈826 kW.

The hydroelectric power generation method for a ship of the present invention is not limited to the above-described method of the embodiment, and various modes are possible. For example,
Even if S ₁ V ≈ S ₂ V does not always hold, S _IN V ≈ S
_{If OUT} V is satisfied, when the flow velocity at the intake port and the discharge port determined by the ship shape are equal, a continuous equation of fluid is established for the water flowing into and discharging the pressure pipe, and the water flowing into the pressure pipe is not wasted. Available.

Further, the power generation gain can be obtained even if S _IN V ≈S _OUT V is not established.

[0021] In addition, the water that has flowed from the water intake S _IN, using the energy of the movement, once lifted to a position higher than the water intake S _IN, to hydroelectric power by changing the energy of motion to the energy of position Even if used, a power generation gain can be obtained.

If the water resistance is small, the pressure pipe may be projected downward from the hull, and the opening of the discharge port may be arranged below the bottom of the ship.

[0023]

According to the method of hydropower generation for a ship of the present invention, a pressure pipe for hydropower generation, a reaction turbine for which a flow velocity is utilized more than a hydraulic pressure, and a generator are provided inside the hull. The water intake is arranged at a position close to the water surface of the outer surface of the hull below the water surface of the ship so as to open toward the traveling direction, and the discharge port of this pressure pipe is below the water intake port and from the water intake port. Is also placed at a position near the stern so as to open in the direction opposite to the traveling direction, so that the kinetic energy of the water flowing into the intake and discharged from the outlet and the drop between the intake and the outlet. There is an effect that a hydroelectric power generation gain can be obtained from the energy of the position of water generated by the above.

Further, according to the hydroelectric power generation method for a ship of the present invention, when the fluid continuity equation S _IN V ≈S _OUT V is established, the flow velocity at the intake port and the discharge port determined by the ship shape are equal, The effect is that the water flowing into the pressure pipe can be used without waste.

Further, according to the hydroelectric power generation method for a ship of the present invention, when the flow continuity equation S ₁ V ≈S ₂ V is satisfied, the flow velocity at the intake port and the discharge port determined by the ship shape are not equal. Also, there is an effect that the water flowing into the pressure pipe can be used without waste.

[Brief description of drawings]

FIG. 1 is a side view of a hydroelectric power generation system for a ship using a method according to an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

[Explanation of symbols]

1 Ship 2 Hull 3 Pressure Pipe 4 Recoil Water Turbine 5 Generator S _IN Inlet S _{OUT Outlet} S ₁ Effective Water Intake Area S ₂ Effective _Outlet Area V Vessel Travel Speed H Drop between Inlet and _Outlet

Claims (3)

[Claims] 1. A pressure pipe for hydroelectric power generation, a reaction turbine and a generator having a greater ratio of utilizing a flow velocity than water pressure are provided in a hull of a ship traveling on or under water, and an intake port of this pressure pipe is provided. The hull outer surface, which is located below the water surface of the ship and close to the water surface, is arranged so as to open toward the traveling direction, and the discharge port of this pressure pipe is below the water intake port and near the stern. Alternatively, the boat may be arranged below the hull so as to open in a direction opposite to the traveling direction, and the boat is operated at a traveling speed V
The vehicle travels at m and takes in the amount of water corresponding to the intake end cross-sectional area S _{IN of the} intake and the traveling speed per second Vm of the ship, rotates the reaction turbine with this water, and rotates the reaction turbine to generate a generator. To generate hydroelectric power, and to use the water after using it for hydroelectric power generation.
From the discharge port, near the discharge port, the traveling speed of the ship is Vm / s.
The water is discharged into the water by the suction force of the passing water at a flow velocity corresponding to the flow velocity, and the kinetic energy of the water flowing into the water intake port and discharged from the water discharge port according to the second speed Vm and the water intake port and the water discharge A hydroelectric power generation method for ships, characterized in that the energy at the position between the mouths is used for hydroelectric power generation. Wherein the open end cross-sectional area _{S OUT} of the open end cross-sectional area _{S IN} of intake discharge port substantially _{equal, S IN} V ≒ S
The hydroelectric power generation method for a ship according to claim 1, wherein _OUT V is set. 3. The intake opening is enlarged from the inside toward the opening end so that the water flowing into the intake has an effective intake area S ₁ assumed inside and outside the opening end of the intake opening. Of the traveling speed of Vm per second to flow into the intake port, and the opening of the outlet is enlarged from the inside toward the opening end so that the water discharged from the outlet is the opening end of the opening of the outlet. The hydroelectric power generation method for a ship according to claim 1, wherein the effective discharge area S ₂ assumed to be inside and outside is passed at a traveling speed Vm of the ship and discharged from the discharge port, and S ₁ V ≈S ₂ V.