The present invention provides an air supply system for an air-lubricated ship, said system being characterized by being provided with: a supercharger (20) that is driven by exhaust gas discharged from a main engine (10) and supplies pressurized air to the main engine (10); an extraction means (32) that extracts a portion of the pressurized air from between the supercharger (20) and the main engine (10); an air supply channel (31) that supplies the pressurized air extracted by the extraction means (32); an air supply port (4) that is provided in the ship bottom (3) of a hull (1) and emits the pressurized air that is supplied via the air supply channel (31); and a motor means (34) that assists rotation of the supercharger (20) during the supply of pressurized air. The air supply system for an air-lubricated ship can efficiently extract pressurized air required for air lubrication from the supercharger (20) even during low-load operation of the main engine (10).
B63B 1/38 - Other means for varying the inherent hydrodynamic characteristics of hulls by reducing surface friction using air bubbles or air layers
B63H 21/14 - Use of propulsion power plant or units on vessels the vessels being motor-driven relating to internal-combustion engines
F02B 37/10 - Engines with exhaust drive and other drive of pumps, e.g. with exhaust-driven pump and mechanically-driven second pump at least one pump being alternately driven by exhaust and other drive
F02B 37/24 - Control of the pumps by using pumps or turbines with adjustable guide vanes
2.
AIR SUPPLY CONTROL SYSTEM FOR AIR LUBRICATED MARINE VESSEL, AND AIR LUBRICATED MARINE VESSEL
Provided is an air supply control system for an air lubricated marine vessel, characterized by being provided with: a supercharger (20) driven by the exhaust gases of the main engine (10) of a marine vessel, for supplying pressurized air to the main engine (10); a draw-off means (52) for drawing off a portion of the pressurized air as a bypass from between the supercharger (20) and the main engine (10); an air supply path (31) for supplying drawn-off pressurized air to an air supply port (4) provided below the draft of the marine vessel; a motor means (51) for energizing rotation of the supercharger (20); a draw-off level setting means (53) for setting the level at which pressurized air is drawn off by the draw-off means (52); and a control means (54) for controlling the motor means (51) according to the draw-off level setting of the draw-off level setting means (53) while taking into account the load on the main engine (10) and the draft of the marine vessel, whereby pressurized air necessary for air lubrication purposes can be drawn off efficiently from the supercharger even at times of low-load operation of the main engine (10), and air lubrication can take place efficiently with no drop in the operating efficiency of the main engine (10), even when fluctuations in draft pressure of the marine vessel or the load of the main engine (10).
B63B 1/38 - Other means for varying the inherent hydrodynamic characteristics of hulls by reducing surface friction using air bubbles or air layers
B63B 39/14 - Equipment to decrease pitch, roll, or like unwanted vessel movementsApparatus for indicating vessel attitude for indicating inclination or duration of roll
B63H 21/14 - Use of propulsion power plant or units on vessels the vessels being motor-driven relating to internal-combustion engines
B63H 21/21 - Control means for engine or transmission, specially adapted for use on marine vessels
F02B 37/04 - Engines with exhaust drive and other drive of pumps, e.g. with exhaust-driven pump and mechanically-driven second pump
3.
STERN DUCT, STERN ATTACHMENT, METHOD OF DESIGNING STERN DUCT, AND SHIP EQUIPPED WITH STERN DUCT
The present invention provides a stern duct, a stern attachment, a method of designing a stern duct, and a ship equipped with a stern duct. In a stern duct (10) mounted forwardly of a propeller (3) which is mounted at a stern (2) of a ship hull (1), a duct body (11) is formed in an arc shape in an angle range of 90º to 140º; the radius (Rr) of a rear end arc portion (11r) formed at the rear end of the duct body (11) is not more than 50% and not less than 20% of the radius of the propeller (3); and, in a forward view of the ship hull (1) from the rear, the duct body (11) is mounted to the stern (2) using a support means (12) so that a duct center line (Yd) of the duct body (11) is inclined in a direction of rotation of the propeller (3) with respect to a propeller center line (Xv) in an upper/lower direction of the propeller (3), whereby the hull efficiency can be improved without an increase in the resistance of the ship hull (1) even with the duct body (11) attached to the ship hull (1).
B63H 5/16 - Arrangements on vessels of propulsion elements directly acting on water of propellers characterised by being mounted in recessesArrangements on vessels of propulsion elements directly acting on water of propellers with stationary water-guiding elementsMeans to prevent fouling of the propeller, e.g. guards, cages or screens
B63H 5/08 - Arrangements on vessels of propulsion elements directly acting on water of propellers of more than one propeller
4.
INWARDLY INCLINED BOW SHAPE, SHIP HAVING INWARDLY INCLINED BOW SHAPE, AND METHOD FOR DESIGNING INWARDLY INCLINED BOW SHAPE
An inwardly inclined bow shape, a ship having the inwardly inclined bow shape, and a method for designing the inwardly inclined bow shape are provided, in which the shape of a frame line of a bow portion has an inwardly inclined shape (20), thereby allowing a reduction in resistance increases in waves without impairing smooth underwater traveling performance. The inwardly inclined shape (20) is inwardly inclined above a static water level rising position, which is the position of the raised water surface during travel in smooth water, that is, waveless water, by the sea speed set as a representative velocity for each ship at the time of design which is generated at the bow portion while the ship is traveling.
In order that in a test on a free running model ship, in which steering force has a dominant influence, auxiliary thrust is set such that steering effectivenesses of the model ship and an actual ship are similar, an auxiliary thrust application means for applying auxiliary thrust to a model ship is controlled according to the calculation result of the auxiliary thrust calculated on the basis of the ship speed of the model ship such that the similarity of steering effectiveness is ensured to thereby apply the auxiliary thrust for ensuing the similarity of the steering effectiveness to the model ship.
G01M 10/00 - Hydrodynamic testingArrangements in or on ship-testing tanks or water tunnels
B63B 9/02 - Methods of designing, building, maintaining, converting, refitting, repairing, or determining properties of, vessels, not otherwise provided for using towing tanks or model basins for designing
6.
SHIP WITH SMALL DUCT AND METHOD FOR ASSESSING APPLICATION OF SMALL DUCT ON SHIP
This ship with a small duct is characterized in having a propeller (10) attached to a stern of a hull (1), and a duct (20) attached to the front of the propeller (10), the hull (1) being a small duct having a propeller load condition in actual sea areas of 1.0 or greater and an eddy resistance of 10% or greater, and the diameter of the duct (20) being between 20% and 50% inclusive of the diameter of the propeller (10). Therefore, a hull (1) that yields a horsepower-reducing effect is specified from the relationship between eddy resistance and the propeller load condition, and the shape of the propeller (10) is contrived and a small duct (20) is placed near the front of the propeller (10) as an energy-saving device that has the characteristics of both a large duct and a small duct, whereby cavitation is suppressed and interference with the small duct (20) is utilized to optimize the radial load distribution of the efficiency-governing propeller (10) in actual sea areas where the load rate increases.
B63H 5/16 - Arrangements on vessels of propulsion elements directly acting on water of propellers characterised by being mounted in recessesArrangements on vessels of propulsion elements directly acting on water of propellers with stationary water-guiding elementsMeans to prevent fouling of the propeller, e.g. guards, cages or screens
B63B 1/32 - Other means for varying the inherent hydrodynamic characteristics of hulls
B63H 5/07 - Arrangements on vessels of propulsion elements directly acting on water of propellers
7.
STIRLING ENGINE CONTROL SYSTEM AND SHIP EQUIPPED WITH STIRLING ENGINE
This Stirling engine control system is characterized by being equipped with: a Stirling engine (10) that uses heat to operate; an electrical generator (20) linked to the Stirling engine (10); an inverter/converter (51) connected to the electrical generator (20); an inverter/converter control means (52) that controls the inverter/converter (51); a Stirling engine starting/stopping means (53) that controls the stopping/starting of the Stirling engine (10); and a control means (54) that controls the inverter/converter control means (52) and the Stirling engine starting/stopping means (53). The Stirling engine (10) can be started in a stable manner, and the Stirling engine (10) can be stopped reliably and quickly.
F01N 5/02 - Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat
F02G 1/043 - Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
[Problem] To provide a control device for a floating-body-type marine wind power generation apparatus that by means of a simple configuration, reduces floating body fluctuation and stabilizes power generator output, while being capable of obtaining maximum efficiency. [Solution] A floating-body-type marine wind power generation apparatus (10) having a rotor (11) that turns by means of wind is provided with: a blade drive means (14) that changes the blade pitch of a blade (13) provided in the rotor (11); and a fluctuation angle sensor (15) that detects the motion of the floating body (12). On the basis of the fluctuation detected by the fluctuation angle sensor (15), the blade (13) is driven by the blade drive means (14) so as to inhibit fluctuation, reducing the fluctuation of the floating body (12), and thereby obtaining maximum efficiency while inhibiting a change in power generation output.
F03D 9/00 - Adaptations of wind motors for special useCombinations of wind motors with apparatus driven therebyWind motors specially adapted for installation in particular locations
F03D 7/02 - Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
This air supply device for an air-lubricated ship is characterized in being provided with a supercharger (10) for supplying pressurized air to a main engine (6) of an air-lubricated ship, an extraction means for extracting part of the pressurized air, a boosting means (30a) for further boosting the pressurized air extracted by the extraction means, a booster route (41a) for supplying the boosted air boosted by the boosting means (30a), a bypass route (51) for bypassing the boosting means (30a), and a route selection means for selecting between the boosting route (41a) and the bypass route (51); the booster route (41a) and/or the bypass route (51) being selected using the route selection means, so that boosted air and/or pressurized air is supplied and discharged around the hull (1). Accordingly, even if the pressure of the pressurized air supplied to the main engine (6) by the supercharger (10) fluctuates due to main engine (6) output and, further, even if draft pressure fluctuates due to a loading state, discharge is possible by boosting pressurized air in accordance with these fluctuations, making high energy efficiency and an improved energy saving effect possible.
This propeller with a small duct is characterized by comprising the following: a propeller (10) which is attached to the stern of a ship hull (1); and a duct (20) attached in front of said propeller (10). Said propeller with a small duct is further characterized in that: the diameter (Ddin) of the duct (20) is 20% to 50% of the diameter (Dp) of the propeller (10); and the pitch (H) of the propeller (10) decreases progressively in the radial (R) direction, with the maximum pitch at the bases of the blades and the minimum pitch at the tips of the blades. By using an energy-efficient device that combines characteristics of large ducts and mid-sized ducts, adjusting the shape of the propeller (10), and disposing the small duct (20) near the front of said propeller (10), cavitation is reduced in ocean areas in which the degree of loading is increased, and interference from the small duct (20) is utilized to optimize the load distribution in the radial (R) direction of the propeller (10), which controls efficiency.
B63H 5/16 - Arrangements on vessels of propulsion elements directly acting on water of propellers characterised by being mounted in recessesArrangements on vessels of propulsion elements directly acting on water of propellers with stationary water-guiding elementsMeans to prevent fouling of the propeller, e.g. guards, cages or screens
Provided is a floating wind turbine capable of damping rolling and yawing of a nacelle by the gyro effect. The rolling and yawing causes an adverse effect on power generation efficiency of the wind turbine and equipment durability thereof. A floating wind turbine (10) comprises a tower (15) having: a rotor (11) rotated by wind; a nacelle (13) housing a rotating shaft (12) of the rotor (11); and a roll bearing (14) turnably supporting the nacelle (13) with respect to the sea surface (P) and functioning as a weathercock. A yawing damping means (16) for damping yawing (T) of the nacelle (13) is provided to the tower (15), with the result that it is possible to suppress the yawing (T) of the nacelle (13) generated by the gyro effect due to pitching (Ω) caused to a floating body (31) by the waves of the sea surface (P).
F03D 9/00 - Adaptations of wind motors for special useCombinations of wind motors with apparatus driven therebyWind motors specially adapted for installation in particular locations
Disclosed is a ship hull structure comprising wave resistance increase minimizing steps, which minimize increases in wave resistance without increasing resistance in calm water. The hull structure comprises bolsters (20) for anchors, which are disposed upon the bow (11) of a vessel (10), and wave resistance increase minimizing steps (30) that repel waves. The wave resistance increase minimizing steps (30) are disposed below the bolsters (20) and above a still water level elevation location (A) upon the bow (11), and minimize resistance increases in waves from the bolsters (20).
Propulsive performance for a ship is improved by effective use of flows generated in rear of skegs when the ship is propelled. A biaxial stern catamaran ship (1) provided with two propellers is provided with propelling means (210, 220) which propel the biaxial stern catamaran ship by driving the two propellers and the two skegs (11, 12) which are provided at the body of the biaxial stern catamaran ship. The centers of the drive shafts of the two propellers are respectively positioned with offset from the center axes of the two skegs. Each of the skegs is twisted in an S-shape so as to change the flow naturally generated toward the rear of the skegs while the ship sails into a rotational flow, and a lot of the generated rotational flows are caught as a counter flow by the blade surface of the propeller positioned at an optimal position.
B63B 9/00 - Methods of designing, building, maintaining, converting, refitting, repairing, or determining properties of, vessels, not otherwise provided for
B63H 5/08 - Arrangements on vessels of propulsion elements directly acting on water of propellers of more than one propeller
B63H 5/125 - Arrangements on vessels of propulsion elements directly acting on water of propellers movably mounted with respect to hull, e.g. adjustable in direction
B63H 5/16 - Arrangements on vessels of propulsion elements directly acting on water of propellers characterised by being mounted in recessesArrangements on vessels of propulsion elements directly acting on water of propellers with stationary water-guiding elementsMeans to prevent fouling of the propeller, e.g. guards, cages or screens
B63H 23/10 - Transmitting power from propulsion power plant to propulsive elements with mechanical gearing for transmitting drive from more than one propulsion power unit
14.
ANTIFOULING COATING COMPOSITION, ANTIFOULING COATING FILM, AND METHOD OF PREVENTING FOULING OF BASE
A two-pack hydrolyzation type antifouling coating composition characterized by comprising a first component, which comprises a polyester resin having an acid value on a solid basis of 50-200, a hydroxy value on a solid basis of 100 or lower, and a viscosity at 25ºC of 500 mPa·s or lower, and a second component, which is a paste containing zinc oxide and cuprous oxide, and by containing a volatile organic compound in an amount of 400 g/L or smaller relative to the total of the first and second components. Provided is an antifouling coating film characterized by being obtained by curing the two-pack hydrolyzation type antifouling coating composition. A method of preventing the fouling of a base is also provided which comprises coating or impregnating the base with the two-pack hydrolyzation type antifouling coating composition and then curing the composition to thereby form an antifouling coating film.
C09D 167/00 - Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chainCoating compositions based on derivatives of such polymers
Provided is a jetted gas control device for performing control in which, for example, the change of ship speed is reflected over time without adversely affecting a main engine. More specifically, a shortage of gas charge rate due to taking out too much gas is prevented from causing the reduction of the efficiency of the main engine and exhaust deterioration, or excessive gas charge rate is prevented from causing the same phenomenon. A frictional resistance reduction device for a ship is characterized by being provided with a main engine (4010) for obtaining the propulsion power of a ship (1), a supercharger (4011) for supplying pressurized gas to the main engine (4010), which is driven by exhaust gas of the main engine (4010), a take-out means (5023, 5024, 5205) for taking out part of the pressurized gas and/or exhaust gas from between the supercharger (4011) and the main engine (4010), a gas jet port (5040) for jetting the pressurized gas and/or exhaust gas taken out to a region (9) near a hull at or below a waterline, and a control unit (4200) for controlling the take-out quantity of the pressurized gas and/or exhaust gas on the basis of a physical quantity related to the heat load of the main engine (10) and the characteristic of the supercharger.
This invention provides a radiation shielding material that has heat resistance and acid resistance as a shielding material in a radiation field, in which neutron and gamma rays are present together, for example, in nuclear facilities, and, at the same time, is lightweight and has low radioactive properties. A heavy metal having a high level of shielding effect against high energy neutron and gamma rays is used in combination with a naturally occurring porous siliceous material having a high hydrogen element content and possessing a high neutron shielding effect and a thermal neutron absorbent to provide shielding effect against both neutron and gamma rays. The mixing ratio of the heavy metal and the thermal neutron absorbent to the porous siliceous material is regulated to properly control the neutron shielding efficiency and the gamma ray shielding efficiency. This construction can provide a radiation shielding material that can realize the highest shielding effect as a practical shielding material, for example, in facilities utilizing fission radiation sources such as atomic reactors.
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