KR20120094520A - Ship and operating method for ship - Google Patents

Abstract

In the near future, the present invention provides a ship and a method of operating the ship that can cope with the tightening of the regulated exhaust gas in a specific exhaust gas regulating area.
A four cycle engine (3) for driving the generator (10), a two cycle engine (2) for driving a propeller shaft (6) equipped with a propeller (7) for propulsion at one end, and the four cycle engine (3). As a motor for rotating the propeller 7 and the propeller shaft 6 by receiving electric power from the denitration apparatus 4 through which only the exhaust gas generated in the air passes, and the generator 10 or a separately prepared power generation apparatus. A shaft motor or a shaft generator motor 8 having a function is provided.

Description

SHIP AND OPERATING METHOD FOR SHIP}

The present invention relates to a ship equipped with a low speed two cycle engine (for example, a two cycle diesel engine) as a main machine and a method of operating the ship.

In recent years, from the viewpoint of environmental conservation, there has been a strong movement to further reduce nitrogen oxides (hereinafter referred to as "NOx") contained in the exhaust gas discharged from the cycle in ships in a specific exhaust gas restricted area. ought. In order to reduce NOx, the method of passing the exhaust gas of a diesel engine through a denitration catalyst is generally known (for example, refer patent document 1 and 2).

Here, as a denitration catalyst, the catalyst based on the selective reduction method (SCR method) which reduces ammonia etc. to nitrogen using a reducing agent is generally used.

Japanese Patent Publication Hei 07-006380 Japanese Patent Application Laid-Open No. 05-288040

However, in the case of the low-speed two-cycle diesel engine as described above, in the case of having an exhaust turbine supercharger, the temperature of the exhaust gas discharged from the exhaust turbine supercharger is 300 ° C or less.

In general, the reduction reaction of NOx in the denitration catalyst is preferably carried out at a temperature higher than 300 ° C to 320 ° C. When a low temperature exhaust gas is passed through the denitration catalyst, the denitration catalyst deteriorates in a short time, There was a problem that the NOx reduction effect was lowered.

This invention is made | formed in order to solve the said subject, and an object of this invention is to provide the ship and the operation method of a ship which can cope with the strengthening regulation of the waste gas currently scheduled in the specific waste gas regulated water area in the near future. .

In order to achieve the above object, the present invention provides the following means.

The ship according to the first aspect of the present invention is a four-cycle engine for driving a generator (four-cycle diesel engine for fueling liquid fuel such as C heavy oil) and two for driving a propeller shaft equipped with a propeller for propulsion at one end. A shaft having a function as a cycle engine, a denitrification apparatus through which only the exhaust gas generated in the four cycle engine passes, and an electric motor for rotating the propeller and the propeller shaft by receiving electric power from the generator or a separately prepared generator. A motor or a shaft generator motor is provided.

The ship according to the second aspect of the present invention includes a four-cycle engine for driving a generator, a two-cycle engine for driving a propeller shaft equipped with a propeller for propulsion at one end thereof, and an exhaust gas generated in the four-cycle engine. And a pod propeller incorporating a denitrification device, which is configured to receive a power supply from the generator, and a propeller drive mechanism for driving the pod propeller.

The ship according to the third aspect of the present invention is a four cycle engine for driving a propeller shaft equipped with a propeller for propulsion at one end via a reducer, and two cycles for driving the propeller and the propeller shaft via the reducer. An engine and a denitrification apparatus through which only the exhaust gas produced | generated by the said four cycle engine pass.

In the ship according to any one of the first to third aspects, the heat exchange between the exhaust gas generated in the four cycle engine or the exhaust gas generated in the four cycle engine and the exhaust gas generated in the two cycle engine It is further preferable to include a steam turbine driven by the steam generated by the second generator and a second generator driven by the steam turbine.

In the ship according to any one of the first to third aspects, a power turbine driven by exhaust gas generated in the four cycle engine and / or exhaust gas generated in the two cycle engine, and by the power turbine, It is more preferable if it is provided with the 2nd generator driven.

In the ship according to any one of the first to third aspects, the first hybrid exhaust turbine supercharger driven by the exhaust gas generated in the second cycle engine and / or the exhaust gas generated in the four cycle engine is driven. It is more preferable if it is equipped with the 2nd hybrid exhaust turbine supercharger which becomes.

The ship according to the fourth aspect of the present invention is a four-cycle gas engine for driving a generator, a two-cycle engine for driving a propeller shaft equipped with a propeller for propulsion at one end thereof, and a power generator from the generator or a power generator prepared separately. A shaft motor or a shaft generator motor having a function as an electric motor that rotates the propeller and the propeller shaft by being supplied is provided.

A ship according to a fifth aspect of the present invention comprises a four-cycle gas engine for driving a generator, a two-cycle engine for driving a propeller shaft having a propeller for propulsion at one end thereof, And a pod propeller incorporating a propeller drive mechanism for driving the propeller.

The ship which concerns on 6th aspect of this invention is a 4 cycle gas engine which drives the propeller shaft equipped with the propeller for propulsion to one end via a reducer, and 2 which drives the said propeller and the said propeller shaft via the said reducer. A cycle engine is provided.

In the ship according to any one of the fourth to sixth aspects, the exhaust gas generated in the four cycle gas engine or the exhaust gas generated in the four cycle gas engine and the exhaust gas generated in the two cycle engine It is more preferable to have a steam turbine driven by steam generated by heat exchange and a second generator driven by the steam turbine.

In the ship according to any one of the fourth to sixth aspects, a power turbine driven by the exhaust gas generated in the four cycle gas engine and / or the exhaust gas generated in the two cycle engine, and the power turbine It is more preferable if it is equipped with the 2nd generator driven by.

In the ship according to any one of the fourth to sixth aspects, the first hybrid exhaust turbine supercharger driven by the exhaust gas generated in the second cycle engine and / or the exhaust gas generated in the four cycle gas engine It is further preferable to be provided with the 2nd hybrid exhaust turbine turbocharger driven.

A ship operating method according to the seventh aspect of the present invention includes a four cycle engine for driving a generator, a two cycle engine for driving a propeller shaft equipped with a propeller for propulsion at one end thereof, and the exhaust gas generated in the four cycle engine. A ship operating method comprising a shaft motor or a shaft generator motor having a function of a denitrification device through which a bay passes, and an electric motor for rotating the propeller and the propeller shaft by receiving electric power from the generator or a separately prepared generator. In the specific sea area, only the four cycle engine was operated, and in the outside of the specific sea area, only the two cycle engine was operated, or the two cycle engine and the four cycle engine were operated in combination.

A ship operating method according to an eighth aspect of the present invention includes a four cycle engine for driving a generator, a two cycle engine for driving a propeller shaft equipped with a propeller for propulsion at one end thereof, and the exhaust gas generated in the four cycle engine. A ship operating method comprising a denitrification device through which a bay passes and a propeller driving mechanism having a propeller drive mechanism for driving a pod propeller by receiving electric power from the generator, operating only the four cycle engine in a specific sea area. Outside the specific sea area, only the two cycle engine was operated or the two cycle engine and the four cycle engine were operated in combination.

A ship operating method according to a ninth aspect of the present invention is a four cycle engine for driving a propeller shaft equipped with a propeller for propulsion at one end via a speed reducer, and the propeller and the propeller shaft through the speed reducer. A ship operating method having a denitration apparatus through which a two-cycle engine to be allowed to pass and only the exhaust gas generated by the four-cycle engine is passed. In the specific sea area, only the four-cycle engine is operated, and in the specific sea area, the two Only the cycle engine was operated or the two cycle engine and the four cycle engine were operated in combination.

A ship operating method according to the tenth aspect of the present invention includes a four cycle gas engine for driving a generator, a two cycle engine for driving a propeller shaft equipped with a propeller for propulsion at one end thereof, and the generator or a power generator prepared separately. A ship operating method comprising a shaft motor or a shaft generator motor having a function as an electric motor that rotates the propeller and the propeller shaft by receiving electric power from the engine, wherein the four cycle gas engine is operated in a specific sea area and specified. Outside the sea area, only the two cycle engine was operated or the two cycle engine and the four cycle gas engine were operated in combination.

A ship operating method according to an eleventh aspect of the present invention includes a four cycle gas engine for driving a generator, a two cycle engine for driving a propeller shaft equipped with a propeller for propulsion at one end thereof, and receiving electric power from the generator. A ship operating method having a pod propeller with a propeller drive mechanism for driving a pod propeller, wherein only the four cycle gas engine is driven in a specific sea area, and only the two cycle engine is driven outside a specific sea area, or The two cycle engine and the four cycle gas engine were operated in combination.

A ship operating method according to a twelfth aspect of the present invention is a four-cycle gas engine that drives a propeller shaft equipped with a propeller for propulsion at one end via a reducer, and the propeller and the propeller shaft via the reducer. A method of operating a ship having a two-cycle engine to be driven, wherein only the four-cycle gas engine is operated in a specific sea area, and only the two-cycle engine is operated outside the specific sea area, or the two-cycle engine and the four-cycle A gas engine was used in combination.

According to the ship and the ship operating method which concerns on this invention, the ship and the ship operating method which can respond to the strengthening regulation of the waste gas currently scheduled in the specific waste gas restricted area in the near future can be provided. .

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram which shows the principal part of the ship which concerns on 1st Embodiment of this invention.
2 is a diagram illustrating a method of operating a ship according to the present invention.
It is a schematic block diagram which shows the principal part of the ship which concerns on 2nd Embodiment of this invention.
It is a schematic block diagram which shows the principal part of the ship which concerns on 3rd Embodiment of this invention.
It is a schematic block diagram which shows the principal part of the ship which concerns on 4th Embodiment of this invention.
6 is a diagram for explaining the effect of the ship and the method for operating the ship according to the fourth embodiment of the present invention.
It is a schematic block diagram which shows the principal part of the ship which concerns on 5th Embodiment of this invention.

[First Embodiment]

The ship and the operating method of a ship which concerns on 1st Embodiment of this invention are demonstrated, referring FIG. 1 and FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic block diagram which shows the principal part of the ship which concerns on this embodiment, and FIG. 2 is a diagram for demonstrating the operating method of the ship which concerns on this invention.

As shown in FIG. 1, the ship 1 which concerns on this embodiment is a two-cycle engine (two-cycle diesel engine which uses liquid fuel, such as C heavy oil, as fuel in this embodiment) 2, and a four-cycle engine. (In this embodiment, the 4-cycle diesel engine which uses liquid fuel, such as C heavy oil, as fuel) 3 and the denitrification apparatus 4 are comprised as a main element.

The crankshaft 5 constituting the two cycle engine 2 is connected (coupled) to the propeller shaft 6 via an intermediate shaft (not shown), a thrust shaft (not shown), and a clutch (not shown). . One end of the propeller shaft 6 is equipped with a propeller 7, and when the crank shaft 5 rotates, the rotation is transmitted to the intermediate shaft, thrust shaft, propeller shaft 6, and propeller 7. Will propel the vessel (1). At the other end of the propeller shaft 6, a shaft motor or a shaft generator motor (SGM) 8 is attached.

The shaft generator motor 8 has a function as a generator that is generated when the propeller shaft 6 rotates, and a generator that is separately prepared (in this embodiment, a diesel generator (D / G installed in a ship (for example, in an engine room)). (9) An electric motor for rotating the propeller shaft 6 by receiving electric power (inboard electric power) from a generator 10 driven by the four-cycle engine 3 described above. ) Is a device with a function as a motor). This apparatus is a power generator equipped separately (in this embodiment, a diesel generator (D / G) 9 installed in the ship (for example, in an engine room), or a generator driven by the four-cycle engine 3 described above ( It is also possible to limit to the function as an electric motor (virtual motor) which receives electric power (inboard electric power) from the generator 10 and rotates the propeller shaft 6. In addition, a frequency converter 13 is formed in the middle of the electric wire 12 that transmits from the main switchboard 11 to the shaft generator motor 8 or from the shaft generator motor 8 to the main switchboard 11. have.

The two cycle engine 2 is provided with a cylinder part (not shown) which consists of a cylinder liner (not shown), a cylinder cover (not shown), etc. In each cylinder part, a piston (connected with the crankshaft 5) ( Not shown) is arranged. Moreover, the exhaust port (not shown) of each cylinder part is connected with the exhaust constant pressure pipe (exhaust manifold) 14. The exhaust static pressure pipe 14 is connected to the inlet side of the turbine portion 15a of the (first) exhaust turbine supercharger 15 via the (first) exhaust pipe L1, and the turbine of the exhaust turbine supercharger 15 is connected. The (second) exhaust pipe L2 is connected to the outlet side of the portion 15a. And the exhaust gas which passed through the turbine part 15a of the exhaust turbine supercharger 15 is guide | induced to a funnel (not shown) via the exhaust pipe L2, and is discharged | emitted outboard.

On the other hand, the scavenging port (not shown) of each cylinder part is connected with the scavenging trunk which is not shown in figure, and the scavenging trunk of the exhaust turbine supercharger 15 is provided via (1st) small engine (not shown). It is connected with the exit side of the compressor part 15b. (1) During the engine, the air cooler (intercooler) etc. which are not shown are connected, and the outside air which passed through the compressor part 15b passes through these air coolers, etc., and is then the scavenging trunk of the 2 cycle engine 2 It is supposed to be supplied to. Moreover, the filter which is not shown in figure is arrange | positioned at the inlet side of the compressor part 15b of the exhaust turbine supercharger 15, The outside air which passed these silencers and a filter is guide | induced to the compressor part 15b.

The exhaust turbine turbocharger 15 is provided with a turbine portion 15a driven by an exhaust gas (combustion gas) derived from the two-cycle engine 2 through an exhaust pipe L1 and a turbine portion 15b driven by the turbine portion 15a A compressor unit 15b for feeding outdoor air to the two-cycle engine 2 and a casing (not shown) formed between the turbine unit 15a and the compressor unit 15b for supporting the compressor unit 15b.

The rotating shaft 15c which protruded one end part to the turbine part 15a side and protruded the other end part to the compressor part 15b is inserted into the casing. One end of the rotating shaft 15c is attached to the turbine disk (not shown) of the turbine rotor (not shown) constituting the turbine portion 15a, and the other end of the rotating shaft 15c is the compressor portion 15b. It is attached to the hub (not shown) of the compressor vane (not shown) which comprises this.

The crankshaft 16 constituting the four-cycle engine 3 is connected (coupled) to the rotating shaft 10a of the generator 10. When the crankshaft 16 rotates, the rotation of the crankshaft 16 It is transmitted to the rotating shaft 10a, so that the generator 10 generates electric power. In addition, the generator 10 is electrically connected to a switchboard 11 separately installed in the ship via the electric wire 17, so that the power generated by the generator 10 can be used (used) as inboard power. have.

The four cycle engine 3 is provided with a cylinder part (not shown) which consists of a cylinder liner (not shown), a cylinder cover (not shown), and the like, and in each cylinder part, a piston connected to the crankshaft 16 ( Not shown) is arranged. Moreover, the exhaust port (not shown) of each cylinder part is connected with the exhaust pipe (exhaust manifold) which is not shown in figure. The exhaust pipe is connected to the inlet side of the turbine portion 18a of the (second) exhaust turbine supercharger 18 via the (3) exhaust pipe (not shown), and the turbine portion 18a of the exhaust turbine supercharger 18. The (fourth) exhaust pipe L4 is connected to the outlet side of the. And the exhaust gas which passed the turbine part 18a of the exhaust turbine supercharger 18 is guide | induced to the denitrification apparatus 4 through the exhaust pipe L4, and is denitrated, (Fifth) a funnel (through the exhaust pipe L5) After discharge), and is discharged outboard.

The denitrification apparatus 4 reduces NOx contained in exhaust gas, and has a catalyst which reduces NOx inside.

On the other hand, the air supply port (not shown) of each cylinder part is connected with the air supply positive pressure pipe (air supply manifold) which is not shown in figure, and the air supply positive pressure pipe is exhaust turbine supercharger ( It is connected with the exit side of the compressor part 18b of 18. (2) The air cooler (intercooler) etc. which are not shown in figure are connected in the middle of a supply pipe, and the air which passed through the compressor part 18b passes through these air coolers, etc., and then supplies the air of the 4 cycle engine 3 It is to be supplied to the constant pressure pipe. Moreover, the filter which is not shown in figure is arrange | positioned at the inlet side of the compressor part 18b of the exhaust turbine supercharger 18, and the outside air which passed through the filter is guide | induced to the compressor part 18b.

The exhaust turbine supercharger 18 is driven by the turbine part 18a driven by the exhaust gas (combustion gas) guided from the four cycle engine 3 via the (third) exhaust pipe, and the turbine part 18a. And a compressor section 18b for pumping outside air into the four-cycle engine 3, and between the turbine section 18a and the compressor section 18b, and having a casing (not shown) supporting them as a main element. will be.

The rotating shaft 18c which protruded one end part to the turbine part 18a side, and the other end part protruded to the compressor part 18b is inserted into the casing. One end of the rotating shaft 18c is attached to a turbine disk (not shown) of the turbine rotor (not shown) constituting the turbine portion 18a, and the other end of the rotating shaft 18c is the compressor portion 18b. It is attached to the hub (not shown) of the compressor vane (not shown) which comprises this.

In addition, the code | symbol 19 in FIG. 1 has shown the electric wire transmitted from the diesel generator 9 to the main switchboard 11. As shown in FIG.

Next, the operation method of the ship 1 which concerns on this embodiment is demonstrated.

First, in a specific exhaust gas regulating area, the exhaust gas temperature is higher than the exhaust gas temperature of the two cycle engine 2, and the denitrification apparatus 4 is operated even after passing through the exhaust turbine supercharger 18 (operation). Drive only the four-cycle engine 3 that generates suitable exhaust gas, and operate only the two-cycle engine 2 that is as efficient as before, or operate only the two-cycle engine 2, except in a specific exhaust gas regulating area. And the four-cycle engine 3 in combination.

That is, in the specific exhaust gas regulating area, only the four-cycle engine 3 is operated so that the generator 10 returns, and electric power is supplied from the generator 10 (and the diesel generator 9, etc.) to the shaft generator motor 8. As a result, the propeller shaft 6 and the propeller 7 rotate. At this time, it is preferable that the edge of the clutch arrange | positioned between the crankshaft 5 and the propeller shaft 6 is broken.

On the other hand, in the case where only the two cycle engine 2 is operated outside the specific exhaust gas regulating area, the crankshaft 5 rotates, and the propeller shaft 6 and the propeller 7 rotate. At this time, the edge of the clutch arrange | positioned between the crankshaft 5 and the propeller shaft 6 is connected. Moreover, electric power is supplied to the shaft generator motor 8 from the generator device (in this embodiment, the diesel generator (D / G) 9 installed inboard (for example, an engine room) in this embodiment) installed separately, and a shaft generator motor ( 8) may be functioned as an electric motor (pseudo motor), or the rotation of the propeller shaft 6 may be pulled out to function as a generator.

On the other hand, in the case where the two-cycle engine 2 and the four-cycle engine 3 are operated in combination outside the specific exhaust gas regulating area, the crankshaft 5 is rotated by the two-cycle engine 2, whereby The propeller shaft 6 and the propeller 7 are rotated. At the same time, the crankshaft 16 is rotated by the four-cycle engine 3, whereby the generator 10 is rotated, and electric power is supplied from the generator 10 to the shaft generator motor 8, whereby the shaft generator motor ( 8) will function as an electric motor (pseudo motor).

In addition, the shift from the operation of only the four-cycle engine 3 to the operation of the two-cycle engine 2 (the section indicated by "I" in FIG. 2), and the four-cycle engine (3 from the operation of only the two-cycle engine 2) ) Transition to the operation only (section indicated by "III" in Fig. 2), for example, by detecting the rotation speed of the propeller shaft 6, so that the rotation speed of the propeller shaft 6 is kept constant, It is preferable to increase or decrease the output of the two cycle engine 2 and the output of the four cycle engine 3, respectively.

Moreover, in the combination (section shown by "II" in FIG. 2) of the 2 cycle engine 2 and the 4 cycle engine 3, the output of the 2 cycle engine 2 is detected, and the 2 cycle engine 2 When the output of P reaches a predetermined value (for example, commercial output), the output of the two cycle engine 2 is maintained at a predetermined value (for example, commercial output), so that only the output of the four cycle engine 3 is maintained. The increase or decrease or the rotation speed of the intermediate shaft (not shown) disposed between the crank shaft 5 and the propeller shaft 6 is detected, and the rotation speed of the two cycle engine 2 is set to a predetermined value (for example, Rotation speed), it is preferable that the rotation speed of the two cycle engine 2 is maintained at a predetermined value (for example, commercial rotation speed), so that only the output of the four cycle engine 3 is increased or decreased.

According to the ship 1 and the operation method of the ship 1 which concern on this embodiment, in the specific exhaust gas control area, only the 4 cycle engine 3 is operated and the exhaust gas produced | generated by the 4 cycle engine 3 is After denitrification by the denitration apparatus 4, it is discharged outboard. Therefore, in the near future, NOx can be reduced to such an extent that it can fully cope with the strengthening regulation of the exhaust gas which is scheduled in a specific exhaust gas restricted area.

In addition, on the premise that the two-cycle engine 2 and the four-cycle engine 3 are operated in combination at the time of navigation outside the specific exhaust gas regulating area, the two-cycle engine 2 is a four-cycle engine 3 ) The engine can be equipped with a low output and a low number of cylinders (for example, a seven-cylinder engine can be a five-cylinder engine) for two outputs, and two cycles can be performed even in a slow ship speed region. Since the engine 2 can be operated with a load with good efficiency (for example, 85% load), the fuel consumption can be reduced.

In addition, since the generator 10 is turned by the four-cycle engine 3 and the generator 10 generates electric power, the electric power generated by the generator 10 can be used (used) as inboard power.

[Second embodiment]

The ship and the operating method of the ship which concern on 2nd Embodiment of this invention are demonstrated, referring FIG. 2 and FIG. 3 is a schematic configuration diagram showing a main part of a ship according to the present embodiment.

In addition, the same code | symbol is attached | subjected to the same component as 1st Embodiment mentioned above, and the description is abbreviate | omitted.

As shown in FIG. 3, the ship 21 which concerns on this embodiment is a two-cycle engine (two-cycle diesel engine which uses liquid fuel, such as C heavy oil, as fuel in this embodiment) 2, and a four-cycle engine. (In this embodiment, the four-cycle diesel engine which uses liquid fuel, such as C heavy oil, as fuel) 3, the denitration apparatus 4, and the pod (POD) propeller 22 are comprised as a main element.

The crankshaft 5 constituting the two cycle engine 2 is connected (coupled) to the propeller shaft 6 via an intermediate shaft (not shown), a thrust shaft (not shown), and a clutch (not shown). . One end of the propeller shaft 6 is equipped with a propeller 7, and when the crank shaft 5 rotates, the rotation is transmitted to the intermediate shaft, thrust shaft, propeller shaft 6, and propeller 7. Will propel the vessel 21.

The pod propeller 22 includes an electric motor (propeller drive mechanism) 24 for rotating the pod propeller 23, a casing (not shown) incorporating the electric motor 24, and a front or rear of the casing (in the present embodiment). The pod propeller 23 which is arrange | positioned at the front) and exerts a thrust force, and the strut (not shown) which are integrally fixed to the upper part of a casing, and have a wing-shaped cross section are provided.

The electric motor 24 is supplied with electric power from the generator 10 via the electric wire 25, and the frequency converter 26 is formed in the middle of the electric wire 25.

Next, the operation method of the ship 21 which concerns on this embodiment is demonstrated.

First, in a specific exhaust gas regulating area, the exhaust gas temperature is higher than the exhaust gas temperature of the two cycle engine 2, and the denitrification apparatus 4 is operated even after passing through the exhaust turbine supercharger 18 (operation). Drive only the four-cycle engine 3 that generates suitable exhaust gas, and operate only the two-cycle engine 2 that is as efficient as before, or operate only the two-cycle engine 2, except in a specific exhaust gas regulating area. And the four-cycle engine 3 in combination.

That is, in the specific exhaust gas regulating area, only the four-cycle engine 3 is driven, the generator 10 is returned, and electric power is supplied from the generator 10 to the electric motor 24 of the pod propeller 22 to supply the pod propeller ( 23) will rotate. At this time, it is preferable that the edge of the clutch arrange | positioned between the crankshaft 5 and the propeller shaft 6 is broken.

On the other hand, in the case where only the two cycle engine 2 is operated outside the specific exhaust gas regulating area, the crankshaft 5 rotates, and the propeller shaft 6 and the propeller 7 rotate. At this time, the edge of the clutch arrange | positioned between the crankshaft 5 and the propeller shaft 6 is connected.

On the other hand, in the case where the two-cycle engine 2 and the four-cycle engine 3 are operated in combination outside the specific exhaust gas regulating area, the crankshaft 5 is rotated by the two-cycle engine 2, whereby The propeller shaft 6 and the propeller 7 are rotated. At the same time, the crankshaft 16 is rotated by the four-cycle engine 3, whereby the generator 10 is turned, and electric power is supplied from the generator 10 to the electric motor 24 of the pod propeller 22. The pod propeller 23 is rotated.

In addition, the shift from the operation of only the four-cycle engine 3 to the operation of the two-cycle engine 2 (the section indicated by "I" in FIG. 2), and the four-cycle engine (3 from the operation of only the two-cycle engine 2) ) Transition to the operation of only (the section indicated by "III" in Fig. 2), for example, detects the rotation speed of the pod propeller 23, and the rotation speed and four cycles of the pod propeller 23 prepared in advance Based on the map showing the relationship of the output of the engine 3, the output of the four-cycle engine 3 is grasped and the relationship between the rotational speed of the pod propeller 23 and the output of the four-cycle engine 3 prepared in advance is shown. Based on the map and a map showing the relationship between the rotational speed of the propeller shaft 6 and the output of the two-cycle engine 2, the total output of the output of the four-cycle engine 3 and the output of the two-cycle engine 2 is 2 cycle engines (2) It is desirable to increase or decrease the output of.

In addition, the combination of the 2 cycle engine 2 and the 4 cycle engine 3 (the section shown as "II" in FIG. 2) detects the output of the 2 cycle engine 2, When the output reaches a predetermined value (e.g., commercial output), the output of the two cycle engine 2 is maintained at a predetermined value (e.g., commercial output) so that only the output of the four cycle engine 3 is increased or decreased. Or rotation speed of the intermediate shaft (not shown) disposed between the crankshaft 5 and the propeller shaft 6, and the rotation speed of the two-cycle engine 2 is a predetermined value (for example, commercial rotation). Number), it is preferable that the rotation speed of the two cycle engine 2 is maintained at a predetermined value (for example, the commercial rotation speed), so that only the output of the four cycle engine 3 is increased or decreased.

According to the ship 21 and the operation method of the ship 21 which concern on this embodiment, in the specific exhaust gas control area, only the 4 cycle engine 3 is operated and the exhaust gas produced | generated by the 4 cycle engine 3 is After denitrification by the denitration apparatus 4, it is discharged outboard. Therefore, in the near future, NOx can be reduced to such an extent that it can fully cope with the strengthening regulation of the exhaust gas which is scheduled in a specific exhaust gas restricted area.

In addition, on the premise that the two-cycle engine 2 and the four-cycle engine 3 are operated in combination at the time of navigation outside the specific exhaust gas regulating area, the two-cycle engine 2 is a four-cycle engine 3 2) The engine can be equipped with a small amount of output and a number of cylinders (for example, a seven-cylinder engine can be a five-cylinder engine) for the output supplied by the engine. Can be operated at a load having a good efficiency (for example, at 85% load), thereby reducing fuel consumption.

In addition, since the generator 10 is turned by the four-cycle engine 3 and the generator 10 generates electric power, the electric power generated by the generator 10 can be used (used) as inboard power.

Furthermore, by setting the wing shape of the propeller 7 and the wing shape of the pod propeller 23 so that the rotation direction of the propeller 7 and the rotation direction of the pod propeller 23 are opposite, the propeller 7 and the pod propeller Since the double inverted propeller is formed in (23), propulsion efficiency can be improved and fuel consumption can be further reduced.

In addition, by using (using) the pod thruster 22 as a stern thruster or a key, a conventional stern thruster and a key can be eliminated.

[Third Embodiment]

The ship and the operating method of the ship which concern on 3rd Embodiment of this invention are demonstrated, referring FIG. 2 and FIG. 4 is a schematic configuration diagram showing a main part of a ship according to the present embodiment.

In addition, the same code | symbol is attached | subjected to the same component as 1st Embodiment mentioned above, and the description is abbreviate | omitted.

As shown in FIG. 4, the ship 31 which concerns on this embodiment is a two-cycle engine (two-cycle diesel engine which uses liquid fuel, such as C heavy oil, as fuel) in this embodiment, and a four-cycle engine. (In this embodiment, the 4-cycle diesel engine which uses liquid fuel, such as C heavy oil, as fuel) (3), the denitrification apparatus 4, and the reducer 32 are comprised as a main element.

The crankshaft 5 constituting the two-cycle engine 2 is connected to the propeller shaft 6 via an intermediate shaft 33, a thrust shaft (not shown), a clutch 34, and a reduction gear 32 (coupled). ) One end of the propeller shaft 6 is equipped with a propeller 7, and when the crankshaft 5 rotates, the rotation of the propeller shaft 6 includes the intermediate shaft 33, the thrust shaft, the reducer 32, and the propeller shaft 6. It is delivered to the propeller 7 to propel the ship 31.

On the other hand, the rotating shaft 10a of the generator 10 is connected (coupled) to the propeller shaft 6 via the clutch 35 and the reducer 32, so that the rotating shaft 10a of the generator 10 (that is, When the crankshaft 16 rotates, the rotation is transmitted to the clutch 35, the reducer 32, the propeller shaft 6, and the propeller 7 to propel the ship 31.

Moreover, one of the small gears (not shown) which comprises the reduction gear 32 is connected to the rotating shaft 36a of the shaft generator motor (SGM) 36 via the coupling or joint which is not shown in figure. These small gears and the rotating shaft 36a are integrally rotated in the same direction. The shaft generator motor 36 has a function as a generator that is generated by the rotation of the small gear, and a diesel generator (D / G) installed in the ship (in the engine room, for example, in the present embodiment) prepared separately. B) an electric motor (pseudo motor) which rotates the small gear and the propeller shaft 6 by receiving electric power (inboard electric power) from a generator 10 driven by the four-cycle engine 3 described above. It is a device with a function as. Moreover, the frequency converter 38 is provided in the middle of the electric wire 37 which transmits from the main switchboard 11 to the shaft generator motor 36 or from the shaft generator motor 36 to the main switchboard 11.

Next, the operation method of the ship 31 which concerns on this embodiment is demonstrated.

First, in a specific exhaust gas regulating area, the exhaust gas temperature is higher than the exhaust gas temperature of the two cycle engine 2, and the denitrification apparatus 4 is operated even after passing through the exhaust turbine supercharger 18 (operation). Drive only the four cycle engine 3 to produce suitable exhaust gas. Outside the specific exhaust gas regulating area, only the highly efficient two cycle engine 2 is operated, or the two cycle engine 2 and the four cycle engine 3 are used in combination.

That is, in a specific exhaust gas regulating area, only the four-cycle engine 3 is operated, and via the clutch 35 and the reduction gear 32, or the shaft generator from the generator 10 (and the diesel generator 9, etc.). Electric power is supplied to the motor 36 to cause the propeller shaft 6 and the propeller 7 to rotate. At this time, the edge of the clutch 34 disposed between the crankshaft 5 and the propeller shaft 6 is preferably broken.

On the other hand, in the case where only the two cycle engine 2 is operated outside the specific exhaust gas regulating area, the crankshaft 5 rotates, and the propeller shaft 6 and the propeller 7 rotate. At this time, the edge of the clutch 34 disposed between the crankshaft 5 and the propeller shaft 6 is connected. Moreover, electric power is supplied to the shaft generator motor 36 from the power generator device (in this embodiment, the diesel generator (D / G) 9 installed inboard (for example, engine room) in this embodiment)) to the shaft generator motor 36, 36 may be functioned as an electric motor (virtual motor), or the rotation of the reducer 32 may be pulled out to function as a generator.

On the other hand, in the case where the two-cycle engine 2 and the four-cycle engine 3 are operated in combination outside the specific exhaust gas regulating area, the crankshaft 5 is rotated by the two-cycle engine 2, whereby The propeller shaft 6 and the propeller 7 are rotated. At the same time, the crankshaft 16 is rotated by the four-cycle engine 3, whereby the generator 10 is turned so that the shaft generator motor 36 from the generator 10 (and the diesel generator 9, etc.) is rotated. The electric power is supplied to the propeller shaft 6 and the propeller 7 to rotate.

In addition, the shift from the operation of only the four-cycle engine 3 to the operation of the two-cycle engine 2 (the section indicated by "I" in FIG. 2), and the four-cycle engine (3 from the operation of only the two-cycle engine 2) ) Transition to the operation only (section indicated by "III" in Fig. 2), for example, by detecting the rotation speed of the propeller shaft 6, so that the rotation speed of the propeller shaft 6 is kept constant, It is preferable to increase or decrease the output of the two cycle engine 2 and the output of the four cycle engine 3, respectively.

In addition, the combination of the 2 cycle engine 2 and the 4 cycle engine 3 (the section shown as "II" in FIG. 2) detects the output of the 2 cycle engine 2, When the output reaches a predetermined value (e.g., commercial output), the output of the two cycle engine 2 is maintained at a predetermined value (e.g., commercial output) so that only the output of the four cycle engine 3 is increased or decreased. It is allowed to detect the rotation speed of the intermediate shaft (not shown) disposed between the crankshaft 5 and the propeller shaft 6, and the rotation speed of the two cycle engine 2 is a predetermined value (for example, commercial rotation). Number), it is preferable that the rotation speed of the two cycle engine 2 is maintained at a predetermined value (for example, the commercial rotation speed), so that only the output of the four cycle engine 3 is increased or decreased.

According to the ship 31 and the operation method of the ship 31 which concern on this embodiment, in the specific exhaust gas control area, only the 4 cycle engine 3 is operated and the exhaust gas produced | generated by the 4 cycle engine 3 is After denitrification by the denitration apparatus 4, it is discharged outboard. Therefore, in the near future, NOx can be reduced to such an extent that it can fully cope with the strengthening regulation of the exhaust gas which is scheduled in a specific exhaust gas restricted area.

In addition, on the premise that the two-cycle engine 2 and the four-cycle engine 3 are operated in combination at the time of navigation outside the specific exhaust gas regulating area, the two-cycle engine 2 is a four-cycle engine 3 2) The engine can be equipped with a small amount of output and a number of cylinders (for example, a seven-cylinder engine can be a five-cylinder engine) for the output supplied by the engine. Can be operated at a load having a good efficiency (for example, at 85% load), thereby reducing fuel consumption.

In addition, since the generator 10 is turned by the four-cycle engine 3 and the generator 10 generates electric power, the electric power generated by the generator 10 can be used (used) as inboard power.

In addition, rotation of the crankshaft 16 of the four-cycle engine 3 is transmitted to the propeller shaft 6 and the propeller 7 efficiently (with only mechanical losses) via the clutch 35 and the reducer 32. As a result, energy loss can be reduced, and fuel consumption can be further reduced.

[Fourth Embodiment]

The ship and the operating method of the ship which concern on 4th Embodiment of this invention are demonstrated, referring FIG. 2, FIG. 5, and FIG. FIG. 5 is a schematic configuration diagram showing a main part of a ship according to the present embodiment, and FIG. 6 is a diagram for explaining the operation and effect of the ship and a ship operating method according to the present embodiment.

In addition, the same code | symbol is attached | subjected to the same component as embodiment mentioned above, and the description is abbreviate | omitted.

As shown in FIG. 5, the ship 41 which concerns on this embodiment consists of two cycle engines (two-cycle diesel engine which uses liquid fuel, such as C heavy oil, as fuel in this embodiment) 2, and a four-cycle engine. (In this embodiment, the four-cycle diesel engine which uses liquid fuel, such as C heavy oil, as fuel) 3, the denitrification apparatus 4, the pod propeller 22, and the steam turbine 42 are main elements. Consists of.

In the steam turbine 42, steam passing through the (first) exhaust gas economizer (exhaust gas boiler) 43 and (second) the exhaust gas economizer (exhaust gas boiler) 44 installed in the funnel is connected to the steam pipe 45. It is supposed to flow through. Steam flowing into the steam turbine 42 flows into the nozzle (not shown), and the retained thermal energy is converted into kinetic energy to become steam of high speed flow. This high-speed steam acts on the turbine blade (not shown) to turn the turbine rotor 46. The rotation of the turbine rotor 46 is decelerated in the reduction gear 49 having the small gear 47 and the standby gear 48 so as to be transmitted to the generator 50. Moreover, the generator 50 is electrically connected with the switchboard 11 separately installed in the ship via the electric wire 51, and can use (use) the electric power which the generator 50 generate | occur | produced as inboard electric power. have.

The steam passing through the steam turbine 42 is led to a condenser (plural water separator) 53 through a pipe 52, and is restored in the condenser 53. The water flowing out from the condenser 53 is led to the exhaust gas economizer 43 through the (first) water supply pipe 54 and heat exchanged with the exhaust gas induced through the exhaust pipe L2, and then (second) It is led to the exhaust gas economizer 44 through the water supply pipe 55, and heat-exchanges with the exhaust gas guided through the exhaust pipe L5 to become steam.

Next, the operation method of the ship 41 which concerns on this embodiment is demonstrated.

First, in a specific exhaust gas regulating area, the exhaust gas temperature is higher than the exhaust gas temperature of the two cycle engine 2, and the denitrification apparatus 4 is operated even after passing through the exhaust turbine supercharger 18 (operation). Drive only the four cycle engine 3 to produce suitable exhaust gas. Outside the specific exhaust gas regulating area, only the highly efficient two cycle engine 2 is operated, or the two cycle engine 2 and the four cycle engine 3 are used in combination.

That is, in the specific exhaust gas regulating area, only the four-cycle engine 3 is driven, the generator 10 is returned, and electric power is supplied from the generator 10 to the electric motor 24 of the pod propeller 22 to supply the pod propeller ( 23) will rotate. At this time, it is preferable that the edge of the clutch arrange | positioned between the crankshaft 5 and the propeller shaft 6 is broken.

On the other hand, in the case where only the two cycle engine 2 is operated outside the specific exhaust gas regulating area, the crankshaft 5 rotates, and the propeller shaft 6 and the propeller 7 rotate. At this time, the edge of the clutch arrange | positioned between the crankshaft 5 and the propeller shaft 6 is connected.

On the other hand, in the case where the two-cycle engine 2 and the four-cycle engine 3 are operated in combination outside the specific exhaust gas regulating area, the crankshaft 5 is rotated by the two-cycle engine 2, whereby The propeller shaft 6 and the propeller 7 are rotated. At the same time, the crankshaft 16 is rotated by the four-cycle engine 3, whereby the generator 10 is turned, and electric power is supplied from the generator 10 to the electric motor 24 of the pod propeller 22. The pod propeller 23 is rotated.

In addition, the shift from the operation of only the four-cycle engine 3 to the operation of the two-cycle engine 2 (the section indicated by "I" in FIG. 2), and the four-cycle engine (3 from the operation of only the two-cycle engine 2) ) Transition to the operation of only (the section indicated by "III" in Fig. 2), for example, detects the rotation speed of the pod propeller 23, and the rotation speed and four cycles of the pod propeller 23 prepared in advance Based on the map showing the relationship of the output of the engine 3, the output of the four-cycle engine 3 is grasped and the relationship between the rotational speed of the pod propeller 23 and the output of the four-cycle engine 3 prepared in advance is shown. Based on the map and a map showing the relationship between the rotational speed of the propeller shaft 6 and the output of the two-cycle engine 2, the total output of the output of the four-cycle engine 3 and the output of the two-cycle engine 2 is 2 cycle engines (2) It is desirable to increase or decrease the output of.

In addition, the combination of the 2 cycle engine 2 and the 4 cycle engine 3 (the section shown as "II" in FIG. 2) detects the output of the 2 cycle engine 2, When the output reaches a predetermined value (e.g., commercial output), the output of the two cycle engine 2 is maintained at a predetermined value (e.g., commercial output) so that only the output of the four cycle engine 3 is increased or decreased. It is allowed to detect the rotation speed of the intermediate shaft (not shown) disposed between the crankshaft 5 and the propeller shaft 6, and the rotation speed of the two cycle engine 2 is a predetermined value (for example, commercial rotation). Number), it is preferable that the rotation speed of the two cycle engine 2 is maintained at a predetermined value (for example, the commercial rotation speed), so that only the output of the four cycle engine 3 is increased or decreased.

According to the ship 41 and the operation method of the ship 41 which concern on this embodiment, in the specific exhaust gas control area, only the 4 cycle engine 3 is operated and the exhaust gas produced | generated by the 4 cycle engine 3 is After denitrification by the denitration apparatus 4, it is discharged outboard. Therefore, in the near future, NOx can be reduced to such an extent that it can fully cope with the strengthening regulation of the exhaust gas which is scheduled in a specific exhaust gas restricted area.

In addition, on the premise that the two-cycle engine 2 and the four-cycle engine 3 are operated in combination at the time of navigation outside the specific exhaust gas regulating area, the two-cycle engine 2 is a four-cycle engine 3 2) The engine can be equipped with a small amount of output and a number of cylinders (for example, a seven-cylinder engine can be a five-cylinder engine) for the output supplied by the engine. Can be operated at a load having a good efficiency (for example, at 85% load), thereby reducing fuel consumption.

In addition, since the generator 10 is turned by the four-cycle engine 3 and the generator 10 generates electric power, the electric power generated by the generator 10 can be used (used) as inboard power.

Furthermore, by setting the wing shape of the propeller 7 and the wing shape of the pod propeller 23 so that the rotation direction of the propeller 7 and the rotation direction of the pod propeller 23 are opposite, the propeller 7 and the pod propeller Since the double inverted propeller is formed in (23), propulsion efficiency can be improved and fuel consumption can be further reduced.

In addition, by using (using) the pod propeller 22 as a stern thruster or a key, the conventional stern thruster and a key can be eliminated.

In addition, when the two-cycle engine 2 and the four-cycle engine 3 are operated in combination at the time of navigation outside the specific exhaust gas restricted area, the exhaust gas economizer 43 is guided through the exhaust pipe L2. The thermal energy of the exhaust gas and the thermal energy of the exhaust gas guided to the exhaust gas economizer 44 through the exhaust pipe L5 are recovered, and as shown in FIG. Since it is maintained, the fuel consumption can be further reduced.

In addition, since the generator 50 is turned by the steam turbine 42, and the generator 50 generates electric power, the electric power generated by the generator 50 can be used (used) as onboard power.

[Fifth Embodiment]

The ship and the operating method of the ship which concerns on 5th Embodiment of this invention are demonstrated, referring FIG. 2 and FIG. 7 is a schematic configuration diagram showing a main part of a ship according to the present embodiment.

The ship 61 which concerns on this embodiment differs from the thing of 4th embodiment mentioned above by the point which is equipped with the power turbine 62 further.

In addition, the same code | symbol is attached | subjected to the component same as 4th Embodiment mentioned above, and the description is abbreviate | omitted.

The exhaust gas guided from the exhaust constant pressure pipe 14 flows into the power turbine 62 via the (sixth) exhaust pipe L6. While the exhaust gas flowing into the power turbine 62 flows through the nozzle (not shown), the retained thermal energy is converted into kinetic energy to become exhaust gas of high speed flow. The exhaust gas of this high velocity flow acts on a turbine blade (not shown) to turn the turbine rotor 63. The rotation of the turbine rotor 63 is transmitted to the small gear 67 having the same number of teeth as the small gear 65 via the small gear 65 and the intermediate gear 66. The small gear 67 is connected to the turbine rotor 46 of the steam turbine 42 via the clutch 68, and the rotation of the small gear 67 is carried out in the state in which the clutch 68 entered. 46 is to be delivered. When the rotation of the small gear 67 is transmitted to the turbine rotor 46, the turbine rotor 46 is rotated, and the rotation of the turbine rotor 46 has the small gear 47 and the standby gear 48. It decelerates in the reducer 49, and is transmitted to the generator 50. As shown in FIG. Moreover, the generator 50 is electrically connected with the switchboard 11 separately installed in the ship via the electric wire 51, and can use (use) the electric power which the generator 50 generate | occur | produced as inboard electric power. have.

The exhaust gas which has passed through the power turbine 62 returns to the middle of the (2) exhaust pipe L2 through the (7th) exhaust pipe L7, and passed through the turbine part 15a of the exhaust turbine supercharger 15. Joined with the exhaust gas, it is led to the (first) exhaust gas economizer (exhaust gas boiler) 43.

Next, the operation method of the ship 51 which concerns on this embodiment is demonstrated.

First, in a specific exhaust gas regulating area, the exhaust gas temperature is higher than the exhaust gas temperature of the two cycle engine 2, and the denitrification apparatus 4 is operated even after passing through the exhaust turbine supercharger 18 (operation). Drive only the four cycle engine 3 to produce suitable exhaust gas. Outside the specific exhaust gas regulating area, only the highly efficient two cycle engine 2 is operated, or the two cycle engine 2 and the four cycle engine 3 are used in combination.

That is, in the specific exhaust gas regulating area, only the four-cycle engine 3 is driven, the generator 10 is returned, and electric power is supplied from the generator 10 to the electric motor 24 of the pod propeller 22 to supply the pod propeller ( 23) will rotate. At this time, it is preferable that the edge of the clutch arrange | positioned between the crankshaft 5 and the propeller shaft 6 is broken.

On the other hand, in the case where only the two cycle engine 2 is operated outside the specific exhaust gas regulating area, the crankshaft 5 rotates, and the propeller shaft 6 and the propeller 7 rotate. At this time, the edge of the clutch arrange | positioned between the crankshaft 5 and the propeller shaft 6 is connected.

On the other hand, in the case where the two-cycle engine 2 and the four-cycle engine 3 are operated in combination outside the specific exhaust gas regulating area, the crankshaft 5 is rotated by the two-cycle engine 2, whereby The propeller shaft 6 and the propeller 7 are rotated. At the same time, the crankshaft 16 is rotated by the four-cycle engine 3, whereby the generator 10 is turned, and electric power is supplied from the generator 10 to the electric motor 24 of the pod propeller 22. The pod propeller 23 is rotated.

In addition, the shift from the operation of only the four-cycle engine 3 to the operation of the two-cycle engine 2 (the section indicated by "I" in FIG. 2), and the four-cycle engine (3 from the operation of only the two-cycle engine 2) ) Transition to the operation of only (the section indicated by "III" in Fig. 2), for example, detects the rotation speed of the pod propeller 23, and the rotation speed and four cycles of the pod propeller 23 prepared in advance Based on the map showing the relationship of the output of the engine 3, the output of the four-cycle engine 3 is grasped and the relationship between the rotational speed of the pod propeller 23 and the output of the four-cycle engine 3 prepared in advance is shown. Based on the map and a map showing the relationship between the rotational speed of the propeller shaft 6 and the output of the two-cycle engine 2, the total output of the output of the four-cycle engine 3 and the output of the two-cycle engine 2 is 2 cycle engines (2) It is desirable to increase or decrease the output of.

In addition, the combination of the 2 cycle engine 2 and the 4 cycle engine 3 (the section shown as "II" in FIG. 2) detects the output of the 2 cycle engine 2, When the output reaches a predetermined value (e.g., commercial output), the output of the two cycle engine 2 is maintained at a predetermined value (e.g., commercial output) so that only the output of the four cycle engine 3 is increased or decreased. It is allowed to detect the rotation speed of the intermediate shaft (not shown) disposed between the crankshaft 5 and the propeller shaft 6, and the rotation speed of the two cycle engine 2 is a predetermined value (for example, commercial rotation). Number), it is preferable that the rotation speed of the two cycle engine 2 is maintained at a predetermined value (for example, the commercial rotation speed), so that only the output of the four cycle engine 3 is increased or decreased.

According to the ship 51 and the operation method of the ship 51 which concern on this embodiment, in the specific exhaust gas control area, only the 4 cycle engine 3 is operated and the exhaust gas produced | generated by the 4 cycle engine 3 is After denitrification by the denitration apparatus 4, it is discharged outboard. Therefore, in the near future, NOx can be reduced to such an extent that it can fully cope with the strengthening regulation of the exhaust gas which is scheduled in a specific exhaust gas restricted area.

In addition, on the premise that the two-cycle engine 2 and the four-cycle engine 3 are operated in combination at the time of navigation outside the specific exhaust gas regulating area, the two-cycle engine 2 is a four-cycle engine 3 2) The engine can be equipped with a small amount of output and a number of cylinders (for example, a seven-cylinder engine can be a five-cylinder engine) for the output supplied by the engine. Can be operated at a load having a good efficiency (for example, at 85% load), thereby reducing fuel consumption.

In addition, since the generator 10 is turned by the four-cycle engine 3 and the generator 10 generates electric power, the electric power generated by the generator 10 can be used (used) as inboard power.

Furthermore, by setting the wing shape of the propeller 7 and the wing shape of the pod propeller 23 so that the rotation direction of the propeller 7 and the rotation direction of the pod propeller 23 are opposite, the propeller 7 and the pod propeller Since the double inverted propeller is formed in (23), propulsion efficiency can be improved and fuel consumption can be further reduced.

In addition, by using (using) the pod propeller 22 as a stern thruster or a key, the conventional stern thruster and a key can be eliminated.

In addition, when the two-cycle engine 2 and the four-cycle engine 3 are operated in combination at the time of navigation outside the specific exhaust gas restricted area, the exhaust gas economizer 43 is guided through the exhaust pipe L2. The thermal energy of the exhaust gas and the thermal energy of the exhaust gas guided to the exhaust gas economizer 44 through the exhaust pipe L5 are recovered, and as shown in FIG. Since it is maintained, the fuel consumption can be further reduced.

In addition, since the generator 50 is turned by the steam turbine 42, and the generator 50 generates electric power, the electric power generated by the generator 50 can be used (used) as onboard power.

In addition, since the heat energy of the exhaust gas guided to the power turbine 62 through the exhaust pipe L6 is further recovered, high efficiency is maintained in a wide range of ship speed than shown in FIG. It can further reduce.

In addition, this invention is not limited to embodiment mentioned above, It can change and change suitably as needed.

For example, in the above-mentioned embodiment, the two-cycle engine 2 employs a two-cycle diesel engine that uses liquid fuel such as heavy oil as the fuel, and the four-cycle engine 3 uses liquid fuel such as C heavy oil as the fuel. Although a 4-cycle diesel engine is employed, a 2-cycle gas engine that uses a boiloff gas such as LNG as the two-cycle engine 2 is used, and the boil-off gas such as LNG is used as the 4-cycle engine 3 as a fuel. It is also possible to employ a four cycle gas engine. As the two-cycle engine 2, a dual-fuel combustion two-cycle engine that uses liquid fuel such as heavy oil and a boil-off gas such as LNG is employed, and as the four-cycle engine 3, liquid fuel such as C heavy oil and A binary fuel combustion four cycle engine etc. which use a boiler off gas, such as LNG, as a fuel can also be employ | adopted.

When the 4-cycle gas engine is employed as the 4-cycle engine 3, the denitrification apparatus 4 can be eliminated.

In addition, the clutch described in the first embodiment, the diesel generator 9, the exhaust turbine supercharger 15, 18, the clutch described in the second embodiment, the exhaust turbine supercharger 15, 18, and the clutch described in the third embodiment ( 34, 35, diesel generator 9, exhaust turbine supercharger 15, 18, shaft generator motor 36, electric wire 37, frequency converter 38, clutch described in the fourth embodiment, diesel generator ( 9), the exhaust turbine superchargers 15, 18, the clutch described in the fifth embodiment, the diesel generator 9, the exhaust turbine superchargers 15, 18, the steam turbine 42, the clutch 68 is an essential component no.

Further, the exhaust gas economizer 43 described in the fourth and fifth embodiments is not an essential component, and thus the exhaust gas economizer 43 and the water supply pipe 55 are removed, and the condenser 53 is removed through the water supply pipe 54. ) May be configured to directly feed water to the exhaust gas economizer 44.

In addition, although the exhaust gas is supplied to the power turbine 62 described in the fifth embodiment only from the two cycle engine 2 side via the exhaust pipe L6, the four cycle engine 3 is not provided through the exhaust pipe (not shown). The exhaust gas may be supplied from the) side, or the exhaust gas may be supplied from the two cycle engine 2 side through the exhaust pipe L6 and from the four cycle engine 3 side through the exhaust pipe not shown. .

Furthermore, in the above-described embodiment, an extremely general exhaust turbine supercharger which does not have a power generation function is employed as the exhaust turbine superchargers 15 and 18, but the exhaust turbine supercharger 15 and 18 has a power generation function. One hybrid exhaust turbine supercharger (for example, the hybrid exhaust turbine supercharger disclosed in Japanese Unexamined Patent Publication No. 2009-191794) can be employed.

As a result, the generator is turned by the hybrid exhaust turbine supercharger, and the generator generates electric power. Therefore, the electric power generated by the generator can be used (used) as onboard power.

1: Ships
2: 2 cycle engine
3: 4 cycle engine
4: denitrification device
6: propeller shaft
7: propeller
8: axis generator motor
10: generator
15: (first hybrid) exhaust turbine supercharger
18: (second hybrid) exhaust turbine supercharger
21: ship
22: Ford Propeller
23: Ford Propeller
24: electric motor (propeller drive mechanism)
31: ship
32: reducer
41: ship
42: steam turbine
50: (second) generator
61: ship
62: power turbine

Claims (18)

4 cycle engine to drive the generator,
Two cycle engine which drives propeller shaft equipped with propeller for propulsion at one end,
A denitrification apparatus through which only the exhaust gas generated in the four cycle engine passes;
And a shaft motor or a shaft generator motor having a function as an electric motor for rotating the propeller and the propeller shaft by receiving electric power from the generator or a separately prepared generator. 4 cycle engine to drive the generator,
Two cycle engine which drives propeller shaft equipped with propeller for propulsion at one end,
A denitrification apparatus through which only the exhaust gas generated in the four cycle engine passes;
And a pod propeller having a propeller drive mechanism configured to drive a pod propeller upon receiving electric power from the generator. A four cycle engine for driving a propeller shaft equipped with a propeller for propulsion at one end via a speed reducer;
A two cycle engine for driving the propeller and the propeller shaft through the reducer;
And a denitrification apparatus through which only the exhaust gas generated in the four cycle engine is passed. The method according to any one of claims 1 to 3,
A steam turbine driven by steam generated by heat exchange with the exhaust gas generated in the four cycle engine or the exhaust gas generated in the four cycle engine and the exhaust gas generated in the two cycle engine;
A ship having a second generator driven by the steam turbine. The method according to any one of claims 1 to 3,
A power turbine driven by exhaust gas generated in the four cycle engine and / or exhaust gas generated in the two cycle engine;
A ship having a second generator driven by the power turbine. The method according to any one of claims 1 to 3,
A first hybrid exhaust turbine supercharger and / or driven by exhaust gas produced in the two cycle engine
And a second hybrid exhaust turbine supercharger driven by exhaust gas generated in said four cycle engine. 4 cycle gas engine to drive the generator,
Two cycle engine which drives propeller shaft equipped with propeller for propulsion at one end,
And a shaft motor or a shaft generator motor having a function as an electric motor for rotating the propeller and the propeller shaft by receiving electric power from the generator or a separately prepared generator. 4 cycle gas engine to drive the generator,
Two cycle engine which drives propeller shaft equipped with propeller for propulsion at one end,
And a pod propeller having a propeller drive mechanism configured to drive a pod propeller upon receiving electric power from the generator. A four cycle gas engine which drives a propeller shaft equipped with a propeller for propulsion at one end via a reducer;
A ship provided with two cycle engines which drive the said propeller and the said propeller shaft via the said speed reducer. 10. The method according to any one of claims 7 to 9,
A steam turbine driven by exhaust gas generated by the four cycle gas engine, or steam generated by heat exchange with the exhaust gas generated by the four cycle gas engine and the exhaust gas generated by the two cycle engine;
A ship having a second generator driven by the steam turbine. 10. The method according to any one of claims 7 to 9,
A power turbine driven by exhaust gas generated in the four cycle gas engine and / or exhaust gas generated in the two cycle engine;
A ship having a second generator driven by the power turbine. 10. The method according to any one of claims 7 to 9,
A first hybrid exhaust turbine supercharger and / or driven by exhaust gas produced in the two cycle engine
And a second hybrid exhaust turbine supercharger driven by exhaust gas generated in said four cycle gas engine. 4 cycle engine to drive the generator,
Two cycle engine which drives propeller shaft equipped with propeller for propulsion at one end,
A denitrification apparatus through which only the exhaust gas generated in the four cycle engine passes;
A method of operating a vessel provided with a shaft motor or a shaft generator motor having a function as an electric motor for rotating the propeller and the propeller shaft by receiving electric power from the generator or a separately prepared power generator,
A ship operating method in a specific sea area, and operates only the said 4 cycle engine outside a specific sea area, or operates the ship using the said 2 cycle engine and the said 4 cycle engine together. 4 cycle engine to drive the generator,
Two cycle engine which drives propeller shaft equipped with propeller for propulsion at one end,
A denitrification apparatus through which only the exhaust gas generated in the four cycle engine passes;
As a method of operation of a ship provided with a pod propeller with a propeller drive mechanism for driving the pod propeller by receiving electric power from the generator,
A ship operating method in a specific sea area, and operates only the said 4 cycle engine outside a specific sea area, or operates the ship using the said 2 cycle engine and the said 4 cycle engine together. A four cycle engine for driving a propeller shaft equipped with a propeller for propulsion at one end via a speed reducer;
A two cycle engine for driving the propeller and the propeller shaft through the reducer;
And a denitration device in which only the exhaust gas generated in the four-cycle engine passes,
A ship operating method in a specific sea area, and operates only the said 4 cycle engine outside a specific sea area, or operates the ship using the said 2 cycle engine and the said 4 cycle engine together. 4 cycle gas engine to drive the generator,
Two cycle engine which drives propeller shaft equipped with propeller for propulsion at one end,
A method of operating a vessel provided with a shaft motor or a shaft generator motor having a function as an electric motor for rotating the propeller and the propeller shaft by receiving electric power from the generator or a separately prepared power generator,
A ship operating method in a specific sea area, and operates only the said 4 cycle gas engine, Outside a specific sea area, it operates only the said 2 cycle engine, or operates the said 2 cycle engine and the said 4 cycle gas engine together. 4 cycle gas engine to drive the generator,
Two cycle engine which drives propeller shaft equipped with propeller for propulsion at one end,
As a method of operation of a ship having a pod propeller with a propeller drive mechanism for receiving a power supply from the generator to drive a pod propeller,
A ship operating method in a specific sea area, and operates only the said 4 cycle gas engine, Outside a specific sea area, it operates only the said 2 cycle engine, or operates the said 2 cycle engine and the said 4 cycle gas engine together. A four cycle gas engine which drives a propeller shaft equipped with a propeller for propulsion at one end via a reducer;
As a ship operating method provided with the 2 cycle engine which drives the said propeller and the said propeller shaft via the said speed reducer,
A ship operating method in a specific sea area, and operates only the said 4 cycle gas engine, Outside a specific sea area, it operates only the said 2 cycle engine, or operates the said 2 cycle engine and the said 4 cycle gas engine together.

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