348results about "Power plants being motor-driven" patented technology

Disclosed herein is a gas purging system for ships having an engine fueled by fuel gas. The gas purging system includes: a fuel supply line along which fuel gas is supplied to the engine; a gas valve unit disposed on the fuel supply line to control a pressure of the fuel gas; and a purge line along which nitrogen gas is supplied to the engine to purge an interior of the engine and an interior of the fuel supply line, wherein the nitrogen gas is directly supplied to the engine along the purge line, purges the interior of the engine and the fuel supply line, and is discharged to outside atmosphere through the gas valve unit.

An electric boat platform (hull base) is disclosed as a product which consists of a metal structure having all the boat functional systems like an electric motor, battery packs, a control system, and other electrical propulsion systems. Boat manufacturers can use this platform as a base in their boats while using their design for the boat. By that, they can save time and cost in developing their electric boat. Also, a proposed method for hull manufacturing has two main parts. The upper part varies by design and the lower part or the standard part that is used as a base for many designs. The standard hull (lower part) consists of a structure, a power system like battery packs, inverters, a motor, and motor control. The lower part is manufactured first and used as a platform having all the electronic parts, motor, batteries, and the like.

A vessel hybrid combined cycle power and propulsion system includes a steam turbine, a gas turbine, an auxiliary generator, an electric propulsion drive system, and an energy storage system, each connected to an AC bus. The system further includes a source of steam for the steam turbine, a control system for controlling operation of the steam turbine, gas turbine, auxiliary generators, electric drive propulsion system and energy storage system. The primary source of steam for the steam turbine is exhaust gas from the gas turbine. The primary source of gas for the gas turbine is boil off gas from the cargo hold. The AC bus includes a plurality of sections of AC bus coupled together by bus ties closed in normal operation forming a closed ring AC bus. The electric propulsion drive system includes a variable speed drive, driving an electric motor coupled through a drive shaft to a propeller.

The invention discloses a ship engine control system, and relates to the technical field of engine control. A ship engine control system comprises a data processing module, a data prediction module, a decision optimization module, a parameter generation module and a control execution module. According to the invention, a plurality of disturbance prediction parameters such as surge arrival time, environment temperature change, port congestion, pitching and rolling change trend, wave period and countercurrent intensity change trend are fused in the data prediction module, and a disturbance arrival time window and an intensity level are calculated, so that potential navigation disturbance is identified in advance; and a basis is provided for feed-forward adjustment of power distribution and combustion control, so that active intervention is realized before disturbance occurs.

The invention discloses a ship side thruster and an installation method thereof.The ship side thruster comprises a side thruster body which comprises a barrel, a rotating rod is rotatably arranged in the barrel, propeller blades are arranged at one end of the rotating rod, the other end of the rotating rod is connected with a first gearbox, and one side of the first gearbox is connected with a first input shaft; the base is used for being connected to a ship and provided with a diesel engine, the output end of the diesel engine is connected with a second gearbox, the output end of the second gearbox is connected with a universal shaft, and one end of the universal shaft is connected with the first input shaft; the two guide pipes are arranged on the side pushing main body, the two ends of the cylinder body are welded with the corresponding guide pipes into a whole, and connecting ribs are arranged on the periphery of the cylinder body. According to the ship side thruster of the structure, deformation of cylinder welding is reduced through the connecting ribs, power is transmitted to the first input shaft through the diesel engine, the second gearbox and the cardan shaft, independent operation of a ship power grid is not depended on, and therefore the ship side thruster deals with the complex ship use environment.

A watercraft propulsion system (100) includes an engine propulsion device (OM) including a power generator (38), an electric propulsion device (EM) connected to a battery (145) charged by the power generator (38), and a controller (101). The controller (101) includes an extender mode in which the electric propulsion device (EM) generates a propulsive force and the power generator (38) of the engine propulsion device (OM) is driven to charge the battery (145). The controller (101) is configured or programmed to change an engine speed of the engine propulsion device (OM) according to a watercraft speed in the extender mode.

The invention discloses a ventilation connecting structure and system for a large pipeline of a ship ammonia fuel engine, and belongs to the technical field of ships, the ventilation connecting structure comprises a first ventilation flange and a second ventilation flange which are connected in a paired mode, and an inner ring sealing structure is arranged at the contact position of the first ventilation flange and the second ventilation flange; an outer ring sealing structure is arranged outside the inner ring sealing structure, an annular discharging groove is formed between the inner ring sealing structure and the outer ring sealing structure, and a ventilation outlet and a cleaning opening are formed in the outer portion of the first ventilation flange and communicate with the annular discharging groove. The ventilation structure of paired installation flanges is simplified, the layout of a ventilation system is optimized, the manufacturing cost is low, and installation is convenient; the required negative pressure ventilation air quantity is small, the type selection capacity and size of each related device and accessory are small, and the initial investment cost, the later maintenance cost and the operation cost are low; ventilation air is distributed in a centralized mode, and through switching of on-off states of the ventilation stop valves, which group of flange connection in the system leaks can be distinguished and confirmed conveniently.

According to the power system of the trailing suction dredger and the control method of the power system, the system comprises a main power module, a storage battery module, a main distribution circuit board and an execution terminal of the trailing suction dredger, and the storage battery module is connected with the input end of the main distribution circuit board through a power distribution switch; the main power module comprises an engine, an adjustable pitch propeller and an axle generator, and the engine is connected with the adjustable pitch propeller and the axle generator through a one-inlet two-outlet gearbox. A storage battery module comprising two storage battery packs is arranged in a main power distribution system, configuration of a power system and a power system is optimized, the power storage battery pack is automatically charged when the load of the main power module is used too low, and the power storage battery pack automatically supplies power to a power grid when the load of the main power module is used too high. The functions of peak load shifting, host operation load stabilizing and host installation power and energy consumption reducing are achieved, and full-automatic intelligent control over the battery management module in the charging and discharging process of the energy storage power storage battery pack is achieved.

A system and method for recovering ammonia from an ammonia-fuelled engine of a vessel. The method comprises: (a) purging the engine with a purge gas to produce an ammonia-containing purge gas stream; (b) passing the ammonia-containing purge gas stream to holding tank(s) on the vessel to create a holding gas; (c) passing the holding gas into a reliquefaction system provided on the vessel to provide a liquid ammonia return stream and a reduced ammonia gaseous stream; and (d) returning the liquid ammonia return stream into a fuel tank configured to supply the engine. The purge gas may be nitrogen. The reliquefaction system may be the same reliquefaction system that the ship uses for recovering boil-off gas, BOG, from a liquefied natural gas, LNG, cargo. There is also described a vessel, such as a liquefied cargo carrier, using said method and system. The engine may be a dual-fuel engine configured to work with a second fuel.

The present invention provides an arrangement structure of a fuel tank for cabins of a ship and electric propulsion, comprising: an electric propulsion system (110) which is arranged in an engine room (111) and provides power produced by a gas turbine (112) as a propulsion force to an electric propulsion motor; a first liquefied gas storage tank (120) which is arranged in a cargo section (A) and supplies a first gas fuel to the gas turbine (112); and a second liquefied gas storage tank (130) which is arranged in a bow section (b) and supplies a second gas fuel to the gas turbine (112), to thereby secure safety and an extra space in the engine room through the arrangement of the second liquefied gas storage tank (130) in the bow.

A vessel for transporting cargo by water comprises one or more propulsion devices with at least one air-breathing engine from the one or more propulsion devices disposed entirely above a surface of the water in a high-speed mode of operation. The least one air-breathing engine is configured to bleed airflow into a fluid circuit. The fluid circuit routes the bleed airflow to one or more fluid outlets disposed entirely below the surface of the water in the high-speed mode of operation. At least some of the one or more fluid outlets release the bleed airflow in the high-speed mode of operation generate a boundary layer along at least a portion of a hull of the vessel to reduce a skin friction drag thereof.

The utility model belongs to the technical field of water resource ecological monitoring, and particularly discloses a water resource ecological monitoring device which comprises a square floating platform, a motor is fixedly connected to the top of the square floating platform, a threaded rod is fixedly connected to the bottom of the motor and penetrates through the square floating platform, and a moving block is in threaded connection to the outer side of the threaded rod. A supporting rod is fixedly connected to one side of the moving block, a monitoring table is fixedly connected to the bottom of the supporting rod, a guide rod is fixedly connected to the other side of the moving block, a fixing plate is fixedly installed at the bottom of the square floating table, a rail is fixedly connected to the bottom of the fixing plate, and one end of the guide rod is located in the rail. The bottom of the square floating platform is fixedly connected with an engine, and the output end of the engine is fixedly connected with a propeller. The device can be used for monitoring different depths and positions of a water area.

A propulsion system (TWIN1) for moving a ship (SHIP1) comprises: - a controllable pitch propeller (PRO1) driven by an engine (ENG1), - a left rudder (R1), - a right rudder (R2), and - a control system (CSYS1), wherein the left rudder (R1) has a first turning axis (AX1) and a first trailing edge (TE1), wherein the right rudder (R2) has a second turning axis (AX2) and a second trailing edge (TE2), wherein a distance (wG) between the trailing edges (TE1, TE2) is adjustable by changing the difference (θ1-θ2) between a rudder angle (θ1) of the left rudder (R1) and a rudder angle (θ2) of the right rudder (R2), wherein the propulsion system (TWIN1) has a first operating mode (MODE1), where changing the velocity (vS) of the ship (SHIP1) comprises changing the shaft power (PS) of the propeller (PRO1), wherein the propulsion system (TWIN1) has a second operating mode (MODE2), where the control system (SYS1) is arranged to change the velocity (vS) of the ship (SHIP1) by changing the difference (θ1-θ2) between the rudder angle (θ1) of the left rudder (R1) and the rudder angle (θ2) of the right rudder (R2), wherein the control system (SYS1) is arranged to change the pitch angle (αP) of the propeller (PRO1) such that the shaft power (PS) is kept substantially equal to a first power value (P1) in a situation where the velocity (vS) of the ship (SHIP1) is changed by changing the difference (θ1-θ2) between the rudder angles (θ1-θ2).

The invention discloses a multi-mode self-adaptive power propulsion control method and system for a bulk cargo ship, relates to the technical field of power propulsion control of bulk cargo ships, and aims to solve the problems of poor power control adaptability and low energy efficiency of an existing bulk cargo ship. According to the method, ship navigation data are collected in real time through a multi-source sensor, and ship working condition features are generated through preprocessing and feature extraction; according to the ship working condition characteristics, the working mode where the ship should be located is judged by fusing a basic rule base and an intelligent reasoning mechanism; and calling a control strategy corresponding to the working mode of the ship to adjust the main engine and the adjustable propeller, and synchronously implementing safety monitoring on mode switching. Efficient and low-carbon operation of the power system of the bulk cargo ship is achieved, the operation safety and reliability of the bulk cargo ship are improved, and the requirements of different navigation working conditions are met.

The utility model discloses a novel concrete transportation and pouring integrated workboat which comprises a boat body, a stirring device, a pumping device and a concrete conveying device. The pumping device and the concrete conveying device are fixedly arranged on the left side and the right side of the stirring device respectively; the stirring device comprises a stirring tank, a power source and a base, the stirring tank is arranged on the central axis of a deck of the ship body, the stern end of the stirring tank is connected with the power source, and the bow end of the stirring tank is connected with a feeding port and a discharging port; the concrete conveying device comprises a steel cable suspension arm, a motor, a rotating base and a conveying pipe, the conveying pipe is welded to the steel cable suspension arm, and the steel cable suspension arm and the motor are connected to the rotating base; the pumping device comprises a horizontal pump truck, a hopper and a steel pump pipe, and the hopper is located below the discharge port; the hopper is connected with a steel pump pipe which is connected with a conveying pipe below the rotating base. The device is reasonable in structure, easy and convenient to operate and capable of reducing construction cost and improving construction efficiency.

A ship equipped with a gas turbine and a waste heat recovery-based electric propulsion system, according to an embodiment of the present invention, enhances the efficiency of a gas turbine (142) by including a stern section (C) comprising: the gas turbine (142), disposed in an engine room (141), that generates electric power by combustion of first fuel supplied from a second fuel tank (143) or second fuel supplied from cargo tanks (TK1 to TK4) and supplies the electric power to an electric propulsion motor; the second fuel tank (143), which is disposed in an upper side free space of the engine room (141), has an upper end exposed to an upper deck (UD), and supplies the first fuel to the gas turbine (142); and a waste heat recovery system (150) that converts waste heat from exhaust gas of the gas turbine (142) into electric power and then supplies the electric power to the electric propulsion motor.

A boat propulsion device includes an engine, an oil pan to store oil to be supplied to the engine, a case to accommodate at least a portion of the oil pan, and a pump to pump cooling water to a cooling water flow path in the boat propulsion device. The cooling water flow path includes a first flow path between the oil pan, the case, and the engine, and a second flow path branching from the first flow path at a location between the oil pan and the case and not extending to the engine. The boat propulsion device further includes a flow rate regulator to change at least one of a flow rate of the cooling water flowing into the first flow path and a flow rate of the cooling water flowing out of the first flow path.

To develop a high speed vessel capable of navigating at a speed of 200 to 300 km / h loaded with several hundred tons of cargo.SOLUTION: In a glider vessel, from both sides or a rear part of a cabin or a cargo compartment on a float, an object having the same function as a rotor which rotates blades of a helicopter is raised vertically from a lower part of the float, another rotor is horizontally attached to a rear side meshed at a gear on its upper end, a propulsive type propeller is attached on its tip, a disc-like gear is attached to a lower end, many reciprocating engines or EV motors are attached in a circle at its tip so as to rotate the disc-like gear at a rotor lower end when a bevel gear is rotated in its outer circumference, and the propulsive type propeller at a rotor tip is rotated when the reciprocating engines or the EV motors are operated so as to obtain great propulsion force.SELECTED DRAWING: Figure 5

To provide a propulsion system, a control program, and a control method for a vessel capable of suppressing deterioration in fuel consumption along with load variation in a propulsion propeller in a vessel including an engine and a rotary machine.SOLUTION: A propulsion system for a vessel includes an engine, a rotary machine, a power converter, and a controller, the controller acquires torque of the engine, torque of the rotary machine, angular speed of the rotary machine, and prefixed moment of inertia for rotational axis conversion of the rotary machine, calculates an estimation value for load torque of the propulsion propeller by using equation of motion for the rotary axis system of the rotary machine, generates a torque command value regarding the torque to be generated by the rotary machine from the propulsion force command value, and compensates the torque command value to cancel fluctuation component of the estimation value of the load torque.SELECTED DRAWING: Figure 2

A method of purging the fuel system (30) of a large turbocharged, two-stroke, dual-fuel, uniflow crosshead internal combustion engine is disclosed, the fuel system having a conventional fuel system supplying a conventional fuel and a second fuel system (30) supplying a liquid second fuel such as ammonia or LPG. The second fuel system includes a second fuel tank (31), a second fuel supply line (32) supplying pressurized second fuel to a fuel valve (49), and a second fuel return line (36) returning the pressurized second fuel from the fuel valve. The engine has a purge gas system that purges the second fuel from a fuel valve, a second fuel supply line, and a second fuel return line to a drain tank (52), and the method is characterized in that after purging stops, a space including at least a portion of the fuel valve and the second fuel supply and return lines is isolated from the rest of the second fuel system by closing a plurality of valves (32d, 36d, 35, 40, 41), and measuring and using an internal pressure and temperature of the space to determine whether the internal pressure of the space corresponds to a saturation pressure on a pressure / temperature saturation curve of the second fuel, and continuing purging if the pressure in the space corresponds to the saturation pressure.

A waterborne vessel includes a fuselage, at least one forward wing coupled to the fuselage, at least one rearward wing coupled to the fuselage and aft of the at least one forward wing, a first pontoon positioned and coupled to a port side of the fuselage, a second pontoon positioned and coupled to a starboard side of the fuselage, and a tail assembly coupled to the fuselage and aft of the at least one rearward wing. The tail assembly includes at least one rudder. The vessel further includes at least one propulsive element coupled to the fuselage and configured to generate airflow toward the tail assembly.

To provide a vessel capable of improving propulsion performance of each method when a hull is propelled by a wind power propulsion unit and when the hull is propelled by a propeller.SOLUTION: A vessel 1 comprises: a propeller 12 that generates thrust for a hull 11; and a wind power propulsion unit 10 that propels the hull 11 by means of wind power. Thus, the vessel 1 can propel the hull 11 by the wind power propulsion unit 10 when wind is strong, and propel the hull 11 by the propeller 12 when wind is weak. The hull 11 is propelled toward a bow during machine traveling where the hull 11 is propelled by the propeller 12, and the hull 11 is propelled toward a stern during sailing where the hull 11 is propelled by the wind power propulsion unit 10. In this case, the vessel 1 can be structured so as to suit the machine traveling for propulsion of the vessel 1 toward the bow. The vessel 1 can be structured so as to suit the sailing for propulsion of the vessel 1 toward the stern.SELECTED DRAWING: Figure 3

The utility model discloses an LNG ship hybrid power system based on fuel oil and natural gas hydrate. The LNG ship hybrid power system comprises an engine selection control unit, an engine, a fuel oil supply unit and a natural gas hydrate supply unit. The engine selection control unit is connected with the engine, the fuel oil supply unit and the natural gas hydrate supply unit, and the engine selection control unit selects the fuel oil supply unit to provide fuel for the engine or selects the natural gas hydrate supply unit to provide fuel for the engine according to the load change of the engine; the fuel supply unit is connected with an engine through a fuel stop valve, and the fuel stop valve is controlled by the engine selection control unit. The natural gas hydrate supply unit is connected with an engine through a natural gas stop valve, and the natural gas stop valve is controlled by the engine selection control unit. The natural gas hydrate releases gaseous natural gas after being heated, and the gaseous natural gas is provided for an engine as fuel.

To provide an engine system capable of responding to fuel gas containing a toxic substance leaked from an engine.SOLUTION: An engine system 1 having an engine 2 driven by fuel containing a toxic substance includes: a case 7 that surrounds the engine 2; and a fuel detection section 8 disposed inside or outside the case 7 to detect fuel leaked to the outside of the engine 2. When a vapor specific gravity of the fuel is larger than a predetermined threshold value, the fuel is detected by using the fuel detection section 8 disposed in the lower part of the case 7, and when the vapor specific gravity of the fuel is smaller than the predetermined threshold value, the fuel is detected by using the fuel detection section 8 disposed in the upper part of the case 7. The fuel containing the toxic substance is either of ammonia or methanol.SELECTED DRAWING: Figure 1

A cooling system for marine jet engines includes a marine jet engine assembly, a pressurized raw water inlet, a centrifugal filter, a strainer, and a hull-mounted heat exchanger. The marine jet engine assembly is configured with an engine, a drive shaft, a stator, a manifold heat exchanger, an exhaust, a water pump, and a coolant outlet so that the vessel can be functional. The pressurized raw water intake is in fluid communication with the stator. The centrifugal filter is in fluid communication with the pressurized raw water intake to supply a direct flow of raw water from the stator. The raw water is then cleaned through the strainer, discharged into a water inlet of the manifold heat exchanger, and discharged from a water outlet of the manifold heat exchanger before exiting into the exhaust. The hull-mounted heat exchanger is in fluid communication with the coolant outlet and the water pump.

The present invention discloses an automatic power conversion device for improving the energy saving of LNG dredgers, including a protective shell, a movable plate slidably connected inside the protective shell, an upper surface of the movable plate fixedly connected to an LNG fuel engine device and a gasoline engine device, a side surface of the LNG fuel engine device fixedly connected to a pressure gauge, a pointer rotatably connected inside the pressure gauge, the other end of the pointer fixedly connected to a turntable, a circumferential surface of the turntable rotatably connected to a connecting rod, a side surface of the LNG fuel engine device slidably connected to a connecting rod, and one end of the connecting rod and the other end of the connecting rod are rotatably connected, and a first conductive sheet is fixedly connected to the surface of the connecting rod. In the present invention, a switch is driven to rotate by mechanical transmission, and the switch is used to automatically switch power fuel for use. There is no need to use electronic intelligent devices for control, so there is no need to use electricity for the control device, thereby improving the energy saving effect.

There is described a method of and system for recovering ammonia from an ammonia-fuelled engine of a vessel comprising at least the steps of purging the engine with a purging gas to produce an ammonia-containing purge gas stream, passing the ammonia-containing purge gas stream to one or more holding tanks on the carrier to create a holding gas, passing the holding gas into a reliquefaction system provided on the vessel to provide a liquid ammonia return stream and a reduced ammonia gaseous stream; and returning the liquid ammonia return stream into an ammonia fuel tank configured to supply the engine. There is also described a vessel, such as a liquefied cargo carrier, using said method and system.

A vessel for transporting cargo by water comprises one or more propulsion devices with at least one air-breathing engine from the one or more propulsion devices disposed entirely above a surface of the water in a high-speed mode of operation. The least one air-breathing engine is configured to bleed airflow into a fluid circuit. The fluid circuit routes the bleed airflow to one or more fluid outlets disposed entirely below the surface of the water in the high-speed mode of operation. At least some of the one or more fluid outlets release the bleed airflow in the high-speed mode of operation generate a boundary layer along at least a portion of a hull of the vessel to reduce a skin friction drag thereof.

A fuel gas supply system for an internal combustion engine (5) has at least one fuel gas pump (29) arranged outside a liquid gas storage tank (4). The pump is connected to the liquid gas in the tank via a liquid gas tank outlet line (26). A heat exchanger circuit comprises a compressor (35) and, downstream of the compressor, a first heat exchanger (30) connected to the fuel gas supply line (25) between the fuel gas pump and a final heat exchanger (31), as well as an expansion device (36) and a second heat exchanger (37).

The invention belongs to the field of engines, and particularly relates to an underwater gas-liquid two-phase ramjet engine based on phase change and a working method thereof.The underwater gas-liquid two-phase ramjet engine based on phase change comprises a liquid nitrogen injector, a diffusion cavity and a spraying cavity, the spraying cavity is of a gradually-shrunk structure, one end of an inlet of the spraying cavity communicates with the diffusion cavity, and the sectional area of the inlet of the spraying cavity is smaller than that of the diffusion cavity; a water inlet is formed in the diffusion cavity; the liquid nitrogen injector is used for injecting liquid nitrogen into the spraying cavity, and the range of the mass ratio of water entering from the water inlet to the liquid nitrogen injected by the liquid nitrogen injector is 1000-300000. The underwater gas-liquid two-phase ramjet engine based on phase change is a novel thrust driving mode based on phase change, and has the characteristics of high specific impulse, low energy consumption, cost saving and environmental protection.