JP2011148399A - Ship and method for operating ship - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ship coping with possible tightening of exhaust emission regulations in a particular marine area under the exhaust gas emission regulations in the near future and to provide a method for operating the ship. <P>SOLUTION: The ship includes: a four-cycle engine 3 for driving a generator 10; a two-cycle engine 2 for driving a propeller shaft 6 having one end to which a propulsive propeller 7 is mounted; a denitrification apparatus 4 passing only exhaust gas generated in the four-cycle engine 3; and a shaft motor or a shaft generator motor 8 serving as an electric motor for rotating the propeller 7 and the propeller shaft 6 by receiving supply of electric power from the generator 10 or a separately provided power-generating equipment. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  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 engine and a method for operating the ship.

In recent years, from the viewpoint of environmental conservation, the movement to further reduce nitrogen oxides (hereinafter referred to as “NOx”) contained in exhaust gas discharged from main engines in ships within specific exhaust gas regulated sea areas Is getting stronger. In order to reduce NOx, a method of passing exhaust gas of a diesel engine through a denitration catalyst is generally known (see, for example, Patent Documents 1 and 2).
Here, as the denitration catalyst, a catalyst based on a selective reduction method (SCR method) in which ammonia or the like is reduced to nitrogen using a reducing agent is generally used.

Japanese Patent Publication No. 07-006380 JP 05-288040 A

However, in the case of the low-speed two-cycle diesel engine as described above and provided with the exhaust turbine supercharger, the temperature of the exhaust gas discharged from the exhaust turbine supercharger is 300 ° C. or less.
In general, the NOx reduction reaction in the denitration catalyst is preferably performed at a temperature higher than 300 ° C. to 320 ° C. If exhaust gas having a temperature lower than this is passed through the denitration catalyst, the denitration catalyst may deteriorate in a short time. There has been a problem that the NOx reduction effect becomes low.

  The present invention has been made in order to solve the above-described problems, and provides a ship and a ship operation method capable of responding to stricter exhaust gas regulations planned in a specific exhaust gas regulation sea area in the near future. The purpose is to provide.

In order to achieve the above object, the present invention provides the following means.
A ship according to the present invention drives a four-cycle engine (four-cycle diesel engine using liquid fuel such as C heavy oil) as a fuel and a propeller shaft having a propeller propelled at one end. The propeller and the propeller shaft are rotated by receiving power from a cycle engine, a denitration device through which only exhaust gas generated by the four-cycle engine passes, and the generator or a separately prepared power generator. A shaft motor or a shaft generator motor having a function as an electric motor is provided.

  The ship according to the present invention includes only a four-cycle engine for driving a generator, a two-cycle engine for driving a propeller shaft having a propeller for propeller attached to one end thereof, and exhaust gas generated by the four-cycle engine. And a pod propulsion unit having a built-in propeller driving mechanism for driving the pod propeller by receiving power supplied from the generator.

  A ship according to the present invention drives a propeller shaft and a propeller shaft via a speed reducer, a four-cycle engine that drives a propeller shaft having a propeller for propulsion attached to one end thereof, and the speed reducer. A two-cycle engine and a denitration device through which only exhaust gas generated by the four-cycle engine is passed are provided.

  In the above-mentioned ship, it is driven by the exhaust gas generated by the 4-cycle engine, or the steam generated by heat exchange between the exhaust gas generated by the 4-cycle engine and the exhaust gas generated by the 2-cycle engine. It is more preferable that a steam turbine and a second generator driven by the steam turbine are provided.

  The ship includes a power turbine driven by exhaust gas generated by the 4-cycle engine and / or exhaust gas generated by the 2-cycle engine, and a second generator driven by the power turbine. More preferably.

  In the ship, a first hybrid exhaust turbine supercharger driven by exhaust gas generated by the two-cycle engine and / or a second hybrid exhaust turbine driven by exhaust gas generated by the four-cycle engine More preferably, a supercharger is provided.

  A ship according to the present invention includes a four-cycle gas engine for driving a generator, a two-cycle engine for driving a propeller shaft having a propeller for propeller attached to one end thereof, the generator, or a separately prepared power generator. A shaft motor or a shaft generator motor having a function as an electric motor for rotating the propeller and the propeller shaft upon receiving electric power from the motor.

  A ship according to the present invention includes a four-cycle gas engine that drives a generator, a two-cycle engine that drives a propeller shaft having a propeller propelled at one end, and a pod that receives power from the generator. And a pod propulsion unit with a built-in propeller drive mechanism for driving the propeller.

  A ship according to the present invention drives a propeller shaft and a propeller shaft via a reduction gear, a four-cycle gas engine that drives a propeller shaft having a propeller for propulsion attached to one end thereof, and the reduction gear. 2 cycle engine.

  Driven by the steam generated by heat exchange between the exhaust gas generated by the four-cycle gas engine or the exhaust gas generated by the four-cycle gas engine and the exhaust gas generated by the two-cycle engine. It is more preferable to include a steam turbine to be operated and a second generator driven by the steam turbine.

  In the ship, a power turbine driven by exhaust gas generated by the 4-cycle gas engine and / or exhaust gas generated by the 2-cycle engine, and a second generator driven by the power turbine More preferably, it is provided.

  In the ship, the first hybrid exhaust turbine supercharger driven by the exhaust gas generated by the two-cycle engine and / or the second hybrid exhaust driven by the exhaust gas generated by the four-cycle gas engine. More preferably, a turbine supercharger is provided.

  A ship operating method according to the present invention includes a four-cycle engine that drives a generator, a two-cycle engine that drives a propeller shaft having a propeller for propulsion attached to one end, and an exhaust generated by the four-cycle engine. A denitration apparatus through which only gas passes, and a shaft motor or a shaft generator having a function as an electric motor that rotates the propeller and the propeller shaft by receiving power from the power generator or a power generator prepared separately A method of operating a ship having a motor, wherein only the four-cycle engine is operated in a specific sea area, and only the two-cycle engine is operated outside a specific sea area, or the two-cycle engine is operated. The engine and the 4-cycle engine were used in combination.

  A ship operating method according to the present invention includes a four-cycle engine that drives a generator, a two-cycle engine that drives a propeller shaft having a propeller for propulsion attached to one end, and an exhaust generated by the four-cycle engine. A ship operation method comprising a denitration device through which only gas passes and a pod propulsion unit having a built-in propeller driving mechanism that receives electric power from the generator to drive a pod propeller. In the above, only the 4-cycle engine is operated, and only the 2-cycle engine is operated outside a specific sea area, or the 2-cycle engine and the 4-cycle engine are used in combination.

  A ship operating method according to the present invention includes a four-cycle engine that drives a propeller shaft having a propeller for propulsion attached to one end thereof via a speed reducer, and the propeller and the propeller shaft via the speed reducer. A two-cycle engine for driving a ship and a denitration device through which only exhaust gas generated by the four-cycle engine is passed, and in a specific sea area, only the four-cycle engine is operated. In operation, outside the specific sea area, only the two-cycle engine is operated, or the two-cycle engine and the four-cycle engine are used in combination.

  The ship operating method according to the present invention includes a four-cycle gas engine for driving a generator, a two-cycle engine for driving a propeller shaft having a propeller for propeller attached to one end thereof, the generator, or a separate device. A ship operating method comprising a shaft motor or a shaft generator motor having a function as an electric motor for rotating the propeller and the propeller shaft upon receiving power supply from a power generator, and in a specific sea area Operates only the 4-cycle gas engine, and operates only the 2-cycle engine outside a specific sea area, or operates the 2-cycle engine and the 4-cycle gas engine in combination. .

  A ship operation method according to the present invention includes a four-cycle gas engine that drives a generator, a two-cycle engine that drives a propeller shaft having a propeller propelled at one end, and power supply from the generator. And a pod propulsion device having a built-in propeller driving mechanism for driving a pod propeller. The ship operation method is for operating only the four-cycle gas engine in a specific sea area and outside the specific sea area. Operates only the two-cycle engine or the two-cycle engine and the four-cycle gas engine in combination.

  A ship operating method according to the present invention includes a four-cycle gas engine that drives a propeller shaft having a propeller for propulsion attached to one end thereof via a reduction gear, and the propeller and the propeller via the reduction gear. A ship operating method comprising a two-cycle engine for driving a shaft, wherein only the four-cycle gas engine is operated in a specific sea area, and only the two-cycle engine is operated outside a specific sea area. Alternatively, the two-cycle engine and the four-cycle gas engine are used in combination.

  According to the ship and the operation method of the ship according to the present invention, it is possible to provide a ship and a ship operation method capable of responding to the stricter exhaust emission regulations planned in a specific exhaust gas restriction sea area in the near future. There is an effect.

It is a schematic block diagram which shows the principal part of the ship which concerns on 1st Embodiment of this invention. It is a chart for demonstrating the operation method of the ship which concerns on this 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. It is a chart for demonstrating the effect of the ship which concerns on 4th Embodiment of this invention, and the operation method of a ship. It is a schematic block diagram which shows the principal part of the ship which concerns on 5th Embodiment of this invention.

[First Embodiment]
A ship and a ship operating method according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2.
FIG. 1 is a schematic configuration diagram showing a main part of a ship according to the present embodiment, and FIG. 2 is a chart for explaining a method for operating the ship according to the present invention.

As shown in FIG. 1, a ship 1 according to this embodiment includes a two-cycle engine (in this embodiment, a two-cycle diesel engine that uses liquid fuel such as C heavy oil) 2 and a four-cycle engine (this embodiment). Then, a 4-cycle diesel engine (3) using a liquid fuel such as C heavy oil as a fuel and a denitration device 4 are mainly configured.
The crankshaft 5 constituting the two-stroke 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). A propeller 7 is attached to one end of the propeller shaft 6. When the crankshaft 5 rotates, the rotation is transmitted to the intermediate shaft, the thrust shaft, the propeller shaft 6, and the propeller 7 to propel the ship 1. Become. A shaft motor or a shaft generator motor (SGM) 8 is attached to the other end of the propeller shaft 6.

  The shaft generator motor 8 has a function as a generator that generates power by rotating the propeller shaft 6 and a separately-generated power generator (in this embodiment, diesel power generation installed in a ship (for example, an engine room)). As an electric motor (heating motor) that rotates the propeller shaft 6 by receiving power (inboard power) supplied from the machine (D / G) 9 or the generator (generator) 10 driven by the four-cycle engine 3 described above. It is a device with a function. This apparatus is a separately prepared power generator (in this embodiment, a diesel generator (D / G) 9 installed in a ship (for example, an engine room) or a generator driven by the above-described four-cycle engine 3 ( Generator) 10) can be limited to a function as an electric motor (biasing motor) that receives the supply of electric power (inboard electric power) and rotates propeller shaft 6. In addition, a frequency converter 13 is provided in the middle of the electric wire 12 that transmits power from the main distribution board 11 to the shaft generator motor 8 or from the shaft generator motor 8 to the main distribution board 11.

  The two-cycle engine 2 is provided with a cylinder portion (not shown) including a cylinder liner (not shown), a cylinder cover (not shown) and the like, and is connected to a crankshaft 5 in each cylinder portion. A piston (not shown) is arranged. Further, the exhaust port (not shown) of each cylinder part is connected to an exhaust static pressure pipe (exhaust manifold) 14. The exhaust static pressure pipe 14 is connected to the inlet side of the turbine section 15 a of the (first) exhaust turbine supercharger 15 via the (first) exhaust pipe L 1, and the turbine section of the exhaust turbine supercharger 15. A (second) exhaust pipe L2 is connected to the outlet side of 15a. The exhaust gas that has passed through the turbine portion 15a of the exhaust turbine supercharger 15 is guided to a funnel (not shown) through the exhaust pipe L2, and then discharged out of the ship.

  On the other hand, a scavenging port (not shown) of each cylinder part is connected to a scavenging trunk (not shown), and the scavenging trunk is connected to the exhaust turbine supercharger 15 via a (first) scavenging pipe (not shown). Is connected to the outlet side of the compressor section 15b. An air cooler (intercooler) (not shown) or the like is connected in the middle of the (first) scavenging pipe, and the outside air that has passed through the compressor unit 15b passes through these air coolers and the like, and then is a two-cycle engine. 2 scavenging trunks. Further, a filter (not shown) is arranged on the inlet side of the compressor unit 15b of the exhaust turbine supercharger 15, and outside air that has passed through the silencer and the filter is guided to the compressor unit 15b.

The exhaust turbine supercharger 15 is driven by an exhaust gas (combustion gas) guided from the two-cycle engine 2 via the exhaust pipe L1, and is driven by the turbine unit 15a to the two-cycle engine 2. The compressor 15b that pumps outside air and a casing (not shown) that is provided between and supports the turbine 15a and the compressor 15b are configured as main elements.
The casing is inserted with a rotating shaft 15c having one end projecting toward the turbine section 15a and the other end projecting to the compressor section 15b. One end portion of the rotating shaft 15c is attached to a turbine disk (not shown) of a turbine rotor (not shown) constituting the turbine portion 15a, and the other end portion of the rotating shaft 15c is connected to the compressor portion 15b. It is attached to a hub (not shown) of a compressor impeller (not shown).

  The crankshaft 16 constituting the four-cycle engine 3 is connected (coupled) to the rotating shaft 10a of the generator 10, and when the crankshaft 16 rotates, the rotation is transmitted to the rotating shaft 10a of the generator 10 to generate power. The machine 10 generates electric power. Further, the generator 10 is electrically connected to a switchboard 11 separately installed in the ship via an electric wire 17 so that the power generated by the generator 10 can be used (utilized) as shipboard power. It has become.

The 4-cycle engine 3 is provided with a cylinder portion (not shown) including a cylinder liner (not shown), a cylinder cover (not shown) and the like, and is connected to a crankshaft 16 in each cylinder portion. A piston (not shown) is arranged. Further, the exhaust port (not shown) of each cylinder part is connected to an exhaust pipe (exhaust manifold) not shown. The exhaust pipe is connected to the inlet side of the turbine section 18a of the (second) exhaust turbine supercharger 18 via a (third) exhaust pipe (not shown). A (fourth) exhaust pipe L4 is connected to the outlet side of the turbine section 18a. Then, the exhaust gas that has passed through the turbine section 18a of the exhaust turbine supercharger 18 is guided to the denitration device 4 through the exhaust pipe L4 and denitrated, and the funnel (not shown) through the (fifth) exhaust pipe L5. )) And then discharged to the outside of the ship.
The denitration device 4 reduces NOx contained in the exhaust gas, and has a catalyst for reducing NOx inside.

  On the other hand, an air supply port (not shown) of each cylinder part is connected to an air supply static pressure pipe (air supply manifold) (not shown), and the air supply static pressure pipe is a (second) air supply pipe (not shown). ) Is connected to the outlet side of the compressor portion 18b of the exhaust turbine supercharger 18. An air cooler (intercooler) (not shown) or the like is connected in the middle of the (second) air supply pipe, and the external air that has passed through the compressor section 18b passes through these air coolers and the like, and then is a 4-cycle engine. 3 is supplied to the static air supply pipe. Further, a filter (not shown) is arranged on the inlet side of the compressor unit 18b of the exhaust turbine supercharger 18, and the outside air that has passed through the filter is guided to the compressor unit 18b.

The exhaust turbine supercharger 18 is driven by exhaust gas (combustion gas) guided from the four-cycle engine 3 via a (third) exhaust pipe, and is driven by the turbine unit 18a to The compressor 18b that pumps outside air to the cycle engine 3 and a casing (not shown) that is provided between and supports the turbine 18a and the compressor 18b are configured as main elements.
The casing is inserted with a rotating shaft 18c having one end projecting toward the turbine section 18a and the other end projecting to the compressor section 18b. One end of the rotating shaft 18c is attached to a turbine disk (not shown) of a turbine rotor (not shown) constituting the turbine portion 18a, and the other end of the rotating shaft 18c is connected to the compressor portion 18b. It is attached to a hub (not shown) of a compressor impeller (not shown).
In addition, the code | symbol 19 in FIG. 1 has shown the electric wire transmitted to the main switchboard 11 from the diesel generator 9. FIG.

Next, a method for operating the ship 1 according to the present embodiment will be described.
First, in a specific exhaust gas regulation sea area, the exhaust gas temperature is higher than the exhaust gas temperature of the two-cycle engine 2 and the denitration device 4 is operated (operated) even after passing through the exhaust turbine supercharger 18. Only the four-cycle engine 3 that generates exhaust gas suitable for the above-mentioned operation is operated, and only the two-cycle engine 2 having high efficiency is operated as usual outside the specific exhaust gas regulation sea area. Operates in conjunction with the 4-cycle engine 3.

That is, in a specific exhaust gas regulation sea area, only the 4-cycle engine 3 is operated and the generator 10 is rotated, and power is supplied from the generator 10 (and the diesel generator 9 and the like) to the shaft generator motor 8. Thus, the propeller shaft 6 and the propeller 7 are rotated. At this time, it is desirable that the edge of the clutch disposed between the crankshaft 5 and the propeller shaft 6 is cut off.
On the other hand, when only the two-cycle engine 2 is operated outside the specific exhaust gas regulation sea area, the crankshaft 5 rotates and the propeller shaft 6 and the propeller 7 are rotated. At this time, the edge of the clutch arranged between the crankshaft 5 and the propeller shaft 6 is connected. Moreover, power is supplied to the shaft generator motor 8 from a separately prepared power generator (in this embodiment, a diesel generator (D / G) 9 installed in a ship (for example, an engine room)), and the shaft generator is supplied. The motor 8 can be made to function as an electric motor (biasing motor), or the rotation of the propeller shaft 6 can be taken out and made to function as a generator.
On the other hand, when the two-cycle engine 2 and the four-cycle engine 3 are operated in combination outside the specific exhaust gas regulation sea area, the crankshaft 5 is rotated by the two-cycle engine 2, thereby the propeller shaft 6. And the propeller 7 will be 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. Function as a biasing motor).

It should be noted that the shift from the operation of only the 4-cycle engine 3 to the operation of only the 2-cycle engine 2 (section indicated by “I” in FIG. 2), and the operation of only the 2-cycle engine 2 to the operation of only the 4-cycle engine 3 The transition (section indicated by “III” in FIG. 2) is performed, for example, by detecting the rotational speed of the propeller shaft 6 so that the rotational speed of the propeller shaft 6 is kept constant. It is desirable to increase or decrease the output of the 4-cycle engine 3 respectively.
Further, in the combined use of the 2-cycle engine 2 and the 4-cycle engine 3 (section indicated by “II” in FIG. 2), the output of the 2-cycle engine 2 is detected, and the output of the 2-cycle engine 2 is a predetermined value (for example, When the output reaches the normal output), the output of the two-cycle engine 2 is maintained at a predetermined value (for example, the normal output), and only the output of the four-cycle engine 3 is increased or decreased, or the crankshaft 5 and the propeller shaft When the rotational speed of an intermediate shaft (not shown) disposed between the two-stroke engine 2 is detected and the rotational speed of the two-cycle engine 2 reaches a predetermined value (for example, a normal rotational speed), It is desirable to increase or decrease only the output of the four-cycle engine 3 so that the rotational speed is maintained at a predetermined value (for example, the normal rotational speed).

According to the ship 1 and the operation method of the ship 1 according to the present embodiment, only the four-cycle engine 3 is operated in a specific exhaust gas regulation sea area, and the exhaust gas generated by the four-cycle engine 3 is denitrated. NOx can be reduced in the near future until it can sufficiently cope with the stricter exhaust emission regulations planned in the specific exhaust gas regulation sea area. .
Also, assuming that the two-cycle engine 2 and the four-cycle engine 3 are operated in combination when navigating outside a specific exhaust gas regulation sea area, the two-cycle engine 2 is equivalent to the output supplied by the four-cycle engine 3. Therefore, an engine with a small output and the number of cylinders can be mounted (for example, a 7-cylinder engine can be changed to a 5-cylinder engine). Even in a region where the boat speed is low, the two-cycle engine 2 is efficiently loaded (for example, 85% load). It is possible to reduce the fuel consumption.
Furthermore, since the generator 10 is rotated by the four-cycle engine 3 and the generator 10 generates electric power, the electric power generated by the generator 10 can be used (utilized) as inboard power.

[Second Embodiment]
A ship and a ship operating method according to a second embodiment of the present invention will be described with reference to FIGS. 2 and 3. FIG. 3 is a schematic configuration diagram showing a main part of the ship according to the present embodiment.
In addition, the same code | symbol is attached | subjected to the component same as 1st Embodiment mentioned above, and the description is abbreviate | omitted.

As shown in FIG. 3, the ship 21 according to the present embodiment includes a two-cycle engine (in this embodiment, a two-cycle diesel engine that uses liquid fuel such as C heavy oil) 2 and a four-cycle engine (this embodiment). The main components are a four-cycle diesel engine 3) using a liquid fuel such as C heavy oil, a denitration device 4, and a pod (POD) propulsion device 22.
The crankshaft 5 constituting the two-stroke 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). A propeller 7 is attached to one end of the propeller shaft 6. When the crankshaft 5 rotates, the rotation is transmitted to the intermediate shaft, the thrust shaft, the propeller shaft 6, and the propeller 7 to propel the ship 21. Become.

The pod propulsion unit 22 is disposed on an electric motor (propeller driving mechanism) 24 for rotating the pod propeller 23, a casing (not shown) incorporating the electric motor 24, and a front or rear (front in the present embodiment) of the casing. It includes a pod propeller 23 that exerts a propulsive force, and a strut (not shown) that is integrally fixed to the upper portion of the casing and has an airfoil cross section.
Electric power is supplied from the generator 10 to the electric motor 24 via an electric wire 25, and a frequency conversion device 26 is provided in the middle of the electric wire 25.

Next, a method for operating the ship 21 according to the present embodiment will be described.
First, in a specific exhaust gas regulation sea area, the exhaust gas temperature is higher than the exhaust gas temperature of the two-cycle engine 2 and the denitration device 4 is operated (operated) even after passing through the exhaust turbine supercharger 18. Only the four-cycle engine 3 that generates exhaust gas suitable for the above-mentioned operation is operated, and only the two-cycle engine 2 having high efficiency is operated as usual outside the specific exhaust gas regulation sea area. Operates in conjunction with the 4-cycle engine 3.

That is, in a specific exhaust gas regulation sea area, only the 4-cycle engine 3 is operated and the generator 10 is rotated, and electric power is supplied from the generator 10 to the electric motor 24 of the pod propulsion unit 22 so that the pod propeller 23 is It will be rotated. At this time, it is desirable that the edge of the clutch disposed between the crankshaft 5 and the propeller shaft 6 is cut off.
On the other hand, when only the two-cycle engine 2 is operated outside the specific exhaust gas regulation sea area, the crankshaft 5 rotates and the propeller shaft 6 and the propeller 7 are rotated. At this time, the edge of the clutch arranged between the crankshaft 5 and the propeller shaft 6 is connected.
On the other hand, when the two-cycle engine 2 and the four-cycle engine 3 are operated in combination outside the specific exhaust gas regulation sea area, the crankshaft 5 is rotated by the two-cycle engine 2, thereby the propeller shaft 6. And the propeller 7 will be rotated. At the same time, the crankshaft 16 is rotated by the four-cycle engine 3, thereby rotating the generator 10, supplying electric power from the generator 10 to the electric motor 24 of the pod propulsion unit 22, and rotating the pod propeller 23. Will be.

It should be noted that the shift from the operation of only the 4-cycle engine 3 to the operation of only the 2-cycle engine 2 (section indicated by “I” in FIG. 2), and the operation of only the 2-cycle engine 2 to the operation of only the 4-cycle engine 3 The transition (section indicated by “III” in FIG. 2) detects, for example, the number of revolutions of the pod propeller 23, and shows the relationship between the number of revolutions of the pod propeller 23 prepared in advance and the output of the four-cycle engine 3. Based on the map shown, the output of the 4-cycle engine 3 is grasped, a map showing the relationship between the rotation speed of the pod propeller 23 and the output of the 4-cycle engine 3 prepared in advance, and the rotation speed of the propeller shaft 6 and 2 Based on the map showing the relationship with the output of the cycle engine 2, the output of the 2-cycle engine 2 is set so that the total output of the output of the 4-cycle engine 3 and the output of the 2-cycle engine 2 is kept constant. It is desirable to increase or decrease.
Further, in the combined use of the 2-cycle engine 2 and the 4-cycle engine 3 (section indicated by “II” in FIG. 2), the output of the 2-cycle engine 2 is detected, and the output of the 2-cycle engine 2 is a predetermined value (for example, When the output reaches the normal output), the output of the two-cycle engine 2 is maintained at a predetermined value (for example, the normal output), and only the output of the four-cycle engine 3 is increased or decreased, or the crankshaft 5 and the propeller shaft When the rotational speed of an intermediate shaft (not shown) disposed between the two-stroke engine 2 is detected and the rotational speed of the two-cycle engine 2 reaches a predetermined value (for example, a normal rotational speed), It is desirable to increase or decrease only the output of the four-cycle engine 3 so that the rotational speed is maintained at a predetermined value (for example, the normal rotational speed).

According to the ship 21 and the operation method of the ship 21 according to the present embodiment, only the 4-cycle engine 3 is operated in a specific exhaust gas regulation sea area, and the exhaust gas generated by the 4-cycle engine 3 is denitrated. NOx can be reduced in the near future until it can sufficiently cope with the stricter exhaust emission regulations planned in the specific exhaust gas regulation sea area. .
Also, assuming that the two-cycle engine 2 and the four-cycle engine 3 are operated in combination when navigating outside a specific exhaust gas regulation sea area, the two-cycle engine 2 is equivalent to the output supplied by the four-cycle engine 3. Therefore, an engine having a small output and the number of cylinders can be mounted (for example, a 7-cylinder engine can be changed to a 5-cylinder engine), and the two-cycle engine 2 can be efficiently loaded (for example, 85% load) even in a low ship speed region. It is possible to reduce the fuel consumption.
Furthermore, since the generator 10 is rotated by the four-cycle engine 3 and the generator 10 generates electric power, the electric power generated by the generator 10 can be used (utilized) as inboard power.

Furthermore, by setting the airfoil of the propeller 7 and the airfoil 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 23 are doubled. Since the inverted propeller is formed, the propulsion efficiency can be improved and the fuel consumption can be further reduced.
Furthermore, by using (using) the pod propulsion device 22 as a Stearns raster or rudder, a conventional Stearns raster or rudder can be made unnecessary.

[Third Embodiment]
A ship and a ship operating method according to a third embodiment of the present invention will be described with reference to FIGS. 2 and 4. FIG. 4 is a schematic configuration diagram showing a main part of the ship according to the present embodiment.
In addition, the same code | symbol is attached | subjected to the component same as 1st Embodiment mentioned above, and the description is abbreviate | omitted.

As shown in FIG. 4, the ship 31 according to the present embodiment includes a two-cycle engine (in this embodiment, a two-cycle diesel engine that uses liquid fuel such as C heavy oil) 2 and a four-cycle engine (this embodiment). Then, a 4-cycle diesel engine (3) using a liquid fuel such as C heavy oil as a fuel, a denitration device 4, and a speed reducer 32 are mainly configured.
The crankshaft 5 constituting the two-cycle engine 2 is connected (coupled) to the propeller shaft 6 via an intermediate shaft 33, a thrust shaft (not shown), a clutch 34, and a speed reducer 32. A propeller 7 is attached to one end of the propeller shaft 6. When the crankshaft 5 rotates, the rotation is transmitted to the intermediate shaft 33, thrust shaft, speed reducer 32, propeller shaft 6, propeller 7, and the ship 31. Will be promoted.

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 speed reducer 32, and when the rotating shaft 10a (that is, the crankshaft 16) of the generator 10 rotates, The rotation is transmitted to the clutch 35, the speed reducer 32, the propeller shaft 6, and the propeller 7 to propel the ship 31.
One of the small gears (not shown) constituting the speed reducer 32 is connected to a rotary shaft 36a of a shaft generator motor (SGM) 36 through a coupling or a joint (not shown). These small gears and the rotary shaft 36a rotate integrally in the same direction. The shaft generator motor 36 has a function as a generator that generates power by rotating a small gear, and a separately prepared generator (in this embodiment, a diesel generator installed in a ship (for example, an engine room)). (D / G) 9 or an electric motor (energizing motor) that rotates the small gear and the propeller shaft 6 by receiving electric power (inboard electric power) from the generator (generator) 10 driven by the four-cycle engine 3 described above. It is a device provided with the function as. A frequency converter 38 is provided in the middle of the electric wire 37 that transmits power from the main distribution board 11 to the shaft generator motor 36 or from the shaft generator motor 36 to the main distribution board 11.

Next, a method for operating the ship 31 according to the present embodiment will be described.
First, in a specific exhaust gas regulation sea area, the exhaust gas temperature is higher than the exhaust gas temperature of the two-cycle engine 2 and the denitration device 4 is operated (operated) even after passing through the exhaust turbine supercharger 18. Only the four-cycle engine 3 that generates exhaust gas suitable for the above-mentioned operation is operated, and only the two-cycle engine 2 having high efficiency is operated as usual outside the specific exhaust gas regulation sea area. Operates in conjunction with the 4-cycle engine 3.

That is, in a specific exhaust gas regulation sea area, only the four-cycle engine 3 is operated, and from the generator 10 (and the diesel generator 9 or the like) to the shaft generator motor 36 via the clutch 35 and the speed reducer 32. Electric power is supplied, and the propeller shaft 6 and the propeller 7 are rotated. At this time, it is desirable that the edge of the clutch 34 disposed between the crankshaft 5 and the propeller shaft 6 is disconnected.
On the other hand, when only the two-cycle engine 2 is operated outside the specific exhaust gas regulation sea area, the crankshaft 5 rotates and the propeller shaft 6 and the propeller 7 are rotated. At this time, the edge of the clutch 34 disposed between the crankshaft 5 and the propeller shaft 6 is connected. In addition, power is supplied to the shaft generator motor 36 from a separately prepared power generator (in this embodiment, a diesel generator (D / G) 9 installed in a ship (for example, an engine room)), and the shaft generator is supplied. The motor 36 can function as an electric motor (a boost motor), or the rotation of the speed reducer 32 can be taken out and functioned as a generator.
On the other hand, when the two-cycle engine 2 and the four-cycle engine 3 are operated in combination outside the specific exhaust gas regulation sea area, the crankshaft 5 is rotated by the two-cycle engine 2, thereby the propeller shaft 6. And the propeller 7 will be rotated. At the same time, the crankshaft 16 is rotated by the four-cycle engine 3, whereby the generator 10 is rotated, and power is supplied from the generator 10 (and the diesel generator 9 etc.) to the shaft generator motor 36. The propeller shaft 6 and the propeller 7 are rotated.

It should be noted that the shift from the operation of only the 4-cycle engine 3 to the operation of only the 2-cycle engine 2 (section indicated by “I” in FIG. 2), and the operation of only the 2-cycle engine 2 to the operation of only the 4-cycle engine 3 The transition (section indicated by “III” in FIG. 2) is performed, for example, by detecting the rotational speed of the propeller shaft 6 so that the rotational speed of the propeller shaft 6 is kept constant. It is desirable to increase or decrease the output of the 4-cycle engine 3 respectively.
Further, in the combined use of the 2-cycle engine 2 and the 4-cycle engine 3 (section indicated by “II” in FIG. 2), the output of the 2-cycle engine 2 is detected, and the output of the 2-cycle engine 2 is a predetermined value (for example, When the output reaches the normal output), the output of the two-cycle engine 2 is maintained at a predetermined value (for example, the normal output), and only the output of the four-cycle engine 3 is increased or decreased, or the crankshaft 5 and the propeller shaft When the rotational speed of an intermediate shaft (not shown) disposed between the two-stroke engine 2 is detected and the rotational speed of the two-cycle engine 2 reaches a predetermined value (for example, a normal rotational speed), It is desirable to increase or decrease only the output of the four-cycle engine 3 so that the rotational speed is maintained at a predetermined value (for example, the normal rotational speed).

According to the ship 31 and the operation method of the ship 31 according to the present embodiment, only the four-cycle engine 3 is operated in a specific exhaust gas regulation sea area, and the exhaust gas generated by the four-cycle engine 3 is denitrated. NOx can be reduced in the near future until it can sufficiently cope with the stricter exhaust emission regulations planned in the specific exhaust gas regulation sea area. .
Also, assuming that the two-cycle engine 2 and the four-cycle engine 3 are operated in combination when navigating outside a specific exhaust gas regulation sea area, the two-cycle engine 2 is equivalent to the output supplied by the four-cycle engine 3. Therefore, an engine having a small output and the number of cylinders can be mounted (for example, a 7-cylinder engine can be changed to a 5-cylinder engine), and the two-cycle engine 2 can be efficiently loaded (for example, 85% load) even in a low ship speed region. It is possible to reduce the fuel consumption.
Furthermore, since the generator 10 is rotated by the four-cycle engine 3 and the generator 10 generates electric power, the electric power generated by the generator 10 can be used (utilized) as inboard power.

  Furthermore, the rotation of the crankshaft 16 of the four-cycle engine 3 is efficiently transmitted to the propeller shaft 6 and the propeller 7 via the clutch 35 and the speed reducer 32 (only by mechanical loss). Loss can be reduced and fuel consumption can be further reduced.

[Fourth Embodiment]
A ship and a ship operating method according to the fourth embodiment of the present invention will be described with reference to FIGS. 2, 5, and 6. FIG. 5 is a schematic configuration diagram showing a main part of the ship according to the present embodiment, and FIG. 6 is a chart for explaining operational effects of the ship and the ship operating method according to the present embodiment.
In addition, the same code | symbol is attached | subjected to the component same as embodiment mentioned above, and the description is abbreviate | omitted.

  As shown in FIG. 5, the ship 41 according to the present embodiment includes a two-cycle engine (in this embodiment, a two-cycle diesel engine that uses liquid fuel such as C heavy oil) 2 and a four-cycle engine (this embodiment). Then, a 4-cycle diesel engine 3) using a liquid fuel such as C heavy oil, a denitration device 4, a pod propulsion unit 22, and a steam turbine 42 are mainly configured.

  The steam that has passed through the (first) exhaust gas economizer (exhaust gas boiler) 43 and the (second) exhaust gas economizer (exhaust gas boiler) 44 installed in the funnel is connected to the steam turbine 42 via the steam pipe 45. Inflow. While the steam that has flowed into the steam turbine 42 flows in a nozzle (not shown), the thermal energy held therein is converted into kinetic energy, and becomes high-speed flowing steam. This high velocity flow of steam acts on turbine blades (not shown) to rotate the turbine rotor 46. The rotation of the turbine rotor 46 is decelerated by a reduction gear 49 having a small gear 47 and a large gear 48 and is transmitted to a generator 50. Moreover, the generator 50 is electrically connected to the switchboard 11 separately installed in the ship via the electric wire 51 so that the power generated by the generator 50 can be used (utilized) as the ship power. It has become.

  The steam that has passed through the steam turbine 42 is guided to a condenser (condenser) 53 through a pipe 52 and is restored in the condenser 53. The water flowing out of the condenser 53 is guided to the exhaust gas economizer 43 through the (first) water supply pipe 54, and is subjected to heat exchange with the exhaust gas guided through the exhaust pipe L2, and then (second). It is led to the exhaust gas economizer 44 via the water supply pipe 55, and is heat-exchanged with the exhaust gas led via the exhaust pipe L5 to become steam.

Next, an operation method of the ship 41 according to the present embodiment will be described.
First, in a specific exhaust gas regulation sea area, the exhaust gas temperature is higher than the exhaust gas temperature of the two-cycle engine 2 and the denitration device 4 is operated (operated) even after passing through the exhaust turbine supercharger 18. Only the four-cycle engine 3 that generates exhaust gas suitable for the above-mentioned operation is operated, and only the two-cycle engine 2 having high efficiency is operated as usual outside the specific exhaust gas regulation sea area. Operates in conjunction with the 4-cycle engine 3.

That is, in a specific exhaust gas regulation sea area, only the 4-cycle engine 3 is operated and the generator 10 is rotated, and electric power is supplied from the generator 10 to the electric motor 24 of the pod propulsion unit 22 so that the pod propeller 23 is It will be rotated. At this time, it is desirable that the edge of the clutch disposed between the crankshaft 5 and the propeller shaft 6 is cut off.
On the other hand, when only the two-cycle engine 2 is operated outside the specific exhaust gas regulation sea area, the crankshaft 5 rotates and the propeller shaft 6 and the propeller 7 are rotated. At this time, the edge of the clutch arranged between the crankshaft 5 and the propeller shaft 6 is connected.
On the other hand, when the two-cycle engine 2 and the four-cycle engine 3 are operated in combination outside the specific exhaust gas regulation sea area, the crankshaft 5 is rotated by the two-cycle engine 2, thereby the propeller shaft 6. And the propeller 7 will be rotated. At the same time, the crankshaft 16 is rotated by the four-cycle engine 3, thereby rotating the generator 10, supplying electric power from the generator 10 to the electric motor 24 of the pod propulsion unit 22, and rotating the pod propeller 23. Will be.

It should be noted that the shift from the operation of only the 4-cycle engine 3 to the operation of only the 2-cycle engine 2 (section indicated by “I” in FIG. 2), and the operation of only the 2-cycle engine 2 to the operation of only the 4-cycle engine 3 The transition (section indicated by “III” in FIG. 2) detects, for example, the number of revolutions of the pod propeller 23, and shows the relationship between the number of revolutions of the pod propeller 23 prepared in advance and the output of the four-cycle engine 3. Based on the map shown, the output of the 4-cycle engine 3 is grasped, a map showing the relationship between the rotation speed of the pod propeller 23 and the output of the 4-cycle engine 3 prepared in advance, and the rotation speed of the propeller shaft 6 and 2 Based on the map showing the relationship with the output of the cycle engine 2, the output of the 2-cycle engine 2 is set so that the total output of the output of the 4-cycle engine 3 and the output of the 2-cycle engine 2 is kept constant. It is desirable to increase or decrease.
Further, in the combined use of the 2-cycle engine 2 and the 4-cycle engine 3 (section indicated by “II” in FIG. 2), the output of the 2-cycle engine 2 is detected, and the output of the 2-cycle engine 2 is a predetermined value (for example, When the output reaches the normal output), the output of the two-cycle engine 2 is maintained at a predetermined value (for example, the normal output), and only the output of the four-cycle engine 3 is increased or decreased, or the crankshaft 5 and the propeller shaft When the rotational speed of an intermediate shaft (not shown) disposed between the two-stroke engine 2 is detected and the rotational speed of the two-cycle engine 2 reaches a predetermined value (for example, a normal rotational speed), It is desirable to increase or decrease only the output of the four-cycle engine 3 so that the rotational speed is maintained at a predetermined value (for example, the normal rotational speed).

According to the ship 41 and the operation method of the ship 41 according to the present embodiment, only the four-cycle engine 3 is operated in a specific exhaust gas restricted sea area, and the exhaust gas generated by the four-cycle engine 3 is removed from the denitration device 4. NOx can be reduced in the near future until it can sufficiently cope with the stricter exhaust emission regulations planned in the specific exhaust gas regulation sea area. .
Also, assuming that the two-cycle engine 2 and the four-cycle engine 3 are operated in combination when navigating outside a specific exhaust gas regulation sea area, the two-cycle engine 2 is equivalent to the output supplied by the four-cycle engine 3. Therefore, an engine having a small output and the number of cylinders can be mounted (for example, a 7-cylinder engine can be changed to a 5-cylinder engine), and the two-cycle engine 2 can be efficiently loaded (for example, 85% load) even in a low ship speed region. It is possible to reduce the fuel consumption.
Furthermore, since the generator 10 is rotated by the four-cycle engine 3 and the generator 10 generates electric power, the electric power generated by the generator 10 can be used (utilized) as inboard power.

Furthermore, by setting the airfoil of the propeller 7 and the airfoil 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 23 are doubled. Since the inverted propeller is formed, the propulsion efficiency can be improved and the fuel consumption can be further reduced.
Furthermore, by using (using) the pod propulsion device 22 as a Stearns raster or rudder, a conventional Stearns raster or rudder can be made unnecessary.

Further, when the two-cycle engine 2 and the four-cycle engine 3 are operated in combination during navigation outside a specific exhaust gas regulation sea area, the exhaust gas led to the exhaust gas economizer 43 through the exhaust pipe L2. The heat energy of the exhaust gas and the heat energy of the exhaust gas led to the exhaust gas economizer 44 through the exhaust pipe L5 are recovered, and as shown in FIG. 6, high efficiency is maintained in a wider speed range than before. Therefore, the fuel consumption can be further reduced.
Furthermore, since the generator 50 is rotated by the steam turbine 42 and the generator 50 generates electric power, the electric power generated by the generator 50 can be used (utilized) as shipboard electric power.

[Fifth Embodiment]
A ship and a ship operating method according to a fifth embodiment of the present invention will be described with reference to FIGS. FIG. 7 is a schematic configuration diagram showing a main part of the ship according to the present embodiment.
The ship 61 according to this embodiment is different from that of the fourth embodiment described above in that it further includes a power turbine 62. Note that the same reference numerals are given to the same components as those of the fourth embodiment described above. A description thereof will be omitted.

  The exhaust gas guided from the exhaust static pressure pipe 14 through the (sixth) exhaust pipe L6 flows into the power turbine 62. While the exhaust gas flowing into the power turbine 62 flows in a nozzle (not shown), the thermal energy held therein is converted into kinetic energy, and becomes high-speed exhaust gas. The exhaust gas flowing at high speed acts on a turbine blade (not shown) to rotate 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 through 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 a clutch 68, and the rotation of the small gear 67 is transmitted to the turbine rotor 46 in a state where the clutch 68 is engaged. . When the rotation of the small gear 67 is transmitted to the turbine rotor 46, the turbine rotor 46 rotates, and the rotation of the turbine rotor 46 is decelerated in a reduction gear 49 having a small gear 47 and a large gear 48. (Generator) 50 is transmitted. Moreover, the generator 50 is electrically connected to the switchboard 11 separately installed in the ship via the electric wire 51 so that the power generated by the generator 50 can be used (utilized) as the ship power. It has become.

  The exhaust gas that has passed through the power turbine 62 is returned to the middle of the (second) exhaust pipe L2 via the (seventh) exhaust pipe L7, and the exhaust gas that has passed through the turbine portion 15a of the exhaust turbine supercharger 15 And is guided to a (first) exhaust gas economizer (exhaust gas boiler) 43.

Next, an operation method of the ship 51 according to the present embodiment will be described.
First, in a specific exhaust gas regulation sea area, the exhaust gas temperature is higher than the exhaust gas temperature of the two-cycle engine 2 and the denitration device 4 is operated (operated) even after passing through the exhaust turbine supercharger 18. Only the four-cycle engine 3 that generates exhaust gas suitable for the above-mentioned operation is operated, and only the two-cycle engine 2 having high efficiency is operated as usual outside the specific exhaust gas regulation sea area. Operates in conjunction with the 4-cycle engine 3.

That is, in a specific exhaust gas regulation sea area, only the 4-cycle engine 3 is operated and the generator 10 is rotated, and electric power is supplied from the generator 10 to the electric motor 24 of the pod propulsion unit 22 so that the pod propeller 23 is It will be rotated. At this time, it is desirable that the edge of the clutch disposed between the crankshaft 5 and the propeller shaft 6 is cut off.
On the other hand, when only the two-cycle engine 2 is operated outside the specific exhaust gas regulation sea area, the crankshaft 5 rotates and the propeller shaft 6 and the propeller 7 are rotated. At this time, the edge of the clutch arranged between the crankshaft 5 and the propeller shaft 6 is connected.
On the other hand, when the two-cycle engine 2 and the four-cycle engine 3 are operated in combination outside the specific exhaust gas regulation sea area, the crankshaft 5 is rotated by the two-cycle engine 2, thereby the propeller shaft 6. And the propeller 7 will be rotated. At the same time, the crankshaft 16 is rotated by the four-cycle engine 3, thereby rotating the generator 10, supplying electric power from the generator 10 to the electric motor 24 of the pod propulsion unit 22, and rotating the pod propeller 23. Will be.

It should be noted that the shift from the operation of only the 4-cycle engine 3 to the operation of only the 2-cycle engine 2 (section indicated by “I” in FIG. 2), and the operation of only the 2-cycle engine 2 to the operation of only the 4-cycle engine 3 The transition (section indicated by “III” in FIG. 2) detects, for example, the number of revolutions of the pod propeller 23, and shows the relationship between the number of revolutions of the pod propeller 23 prepared in advance and the output of the four-cycle engine 3. Based on the map shown, the output of the 4-cycle engine 3 is grasped, a map showing the relationship between the rotation speed of the pod propeller 23 and the output of the 4-cycle engine 3 prepared in advance, and the rotation speed of the propeller shaft 6 and 2 Based on the map showing the relationship with the output of the cycle engine 2, the output of the 2-cycle engine 2 is set so that the total output of the output of the 4-cycle engine 3 and the output of the 2-cycle engine 2 is kept constant. It is desirable to increase or decrease.
Further, in the combined use of the 2-cycle engine 2 and the 4-cycle engine 3 (section indicated by “II” in FIG. 2), the output of the 2-cycle engine 2 is detected, and the output of the 2-cycle engine 2 is a predetermined value (for example, When the output reaches the normal output), the output of the two-cycle engine 2 is maintained at a predetermined value (for example, the normal output), and only the output of the four-cycle engine 3 is increased or decreased, or the crankshaft 5 and the propeller shaft When the rotational speed of an intermediate shaft (not shown) disposed between the two-stroke engine 2 is detected and the rotational speed of the two-cycle engine 2 reaches a predetermined value (for example, a normal rotational speed), It is desirable to increase or decrease only the output of the four-cycle engine 3 so that the rotational speed is maintained at a predetermined value (for example, the normal rotational speed).

According to the ship 51 and the operation method of the ship 51 according to the present embodiment, only the four-cycle engine 3 is operated in a specific exhaust gas regulation sea area, and the exhaust gas generated by the four-cycle engine 3 is denitrated. NOx can be reduced in the near future until it can sufficiently cope with the stricter exhaust emission regulations planned in the specific exhaust gas regulation sea area. .
Also, assuming that the two-cycle engine 2 and the four-cycle engine 3 are operated in combination when navigating outside a specific exhaust gas regulation sea area, the two-cycle engine 2 is equivalent to the output supplied by the four-cycle engine 3. However, it is possible to mount an engine with a small output and the number of cylinders (for example, a 7-cylinder engine can be changed to a 5-cylinder engine). Since it can drive | operate, fuel consumption can be reduced.
Furthermore, since the generator 10 is rotated by the four-cycle engine 3 and the generator 10 generates electric power, the electric power generated by the generator 10 can be used (utilized) as inboard power.

Furthermore, by setting the airfoil of the propeller 7 and the airfoil 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 23 are doubled. Since the inverted propeller is formed, the propulsion efficiency can be improved and the fuel consumption can be further reduced.
Furthermore, by using (using) the pod propulsion device 22 as a Stearns raster or rudder, a conventional Stearns raster or rudder can be made unnecessary.

Further, when the two-cycle engine 2 and the four-cycle engine 3 are operated in combination during navigation outside a specific exhaust gas regulation sea area, the exhaust gas led to the exhaust gas economizer 43 through the exhaust pipe L2. The heat energy of the exhaust gas and the heat energy of the exhaust gas led to the exhaust gas economizer 44 through the exhaust pipe L5 are recovered, and as shown in FIG. 6, high efficiency is maintained in a wider speed range than before. Therefore, the fuel consumption can be further reduced.
Furthermore, since the generator 50 is rotated by the steam turbine 42 and the generator 50 generates electric power, the electric power generated by the generator 50 can be used (utilized) as shipboard electric power.

  Furthermore, since the heat energy of the exhaust gas led to the power turbine 62 via the exhaust pipe L6 is further recovered, high efficiency is maintained in a wider ship speed range than that shown in FIG. Consumption can be further reduced.

Note that the present invention is not limited to the above-described embodiment, and can be modified and changed as necessary.
For example, in the above-described embodiment, a two-cycle diesel engine that uses a liquid fuel such as heavy oil as the fuel is adopted as the two-cycle engine 2, and a four-cycle diesel that uses a liquid fuel such as C heavy oil as the fuel as the four-cycle engine 3. The engine is adopted, but as the 2-cycle engine 2, a 2-cycle gas engine that uses boil-off gas such as LNG as a fuel is adopted, and as the 4-cycle engine 3, a 4-cycle gas engine that uses boil-off gas such as LNG as a fuel is adopted. Alternatively, as the two-cycle engine 2, a dual fuel-fired two-cycle engine using a liquid fuel such as heavy oil and a boil-off gas such as LNG as the fuel is adopted, and as the four-cycle engine 3, a liquid fuel such as C heavy oil is used. Alternatively, a dual fuel-fired four-cycle engine using boil-off gas such as LNG as fuel can be employed.
When a 4-cycle gas engine is adopted as the 4-cycle engine 3, the denitration device 4 can be dispensed with.

  The clutch described in the first embodiment, the diesel generator 9, the exhaust turbine superchargers 15 and 18, the clutch described in the second embodiment, the exhaust turbine superchargers 15 and 18, and the third embodiment. The clutches 34 and 35 described above, the diesel generator 9, the exhaust turbine superchargers 15 and 18, the shaft generator motor 36, the electric wire 37, the frequency converter 38, the clutch described in the fourth embodiment, and the diesel generator 9 The exhaust turbine superchargers 15 and 18, the clutch described in the fifth embodiment, the diesel generator 9, the exhaust turbine superchargers 15 and 18, the steam turbine 42, and the clutch 68 are not essential components.

  Further, the exhaust gas economizer 43 described in the fourth embodiment and the fifth embodiment is not an essential component, and the exhaust gas economizer 43 and the water supply pipe 55 are eliminated, and the exhaust gas economizer 43 is removed from the condenser 53 via the water supply pipe 54. You may comprise so that water may be supplied directly to the miser 44.

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

Furthermore, in the above-described embodiment, as the exhaust turbine superchargers 15 and 18, a very general exhaust turbine supercharger having no power generation function is adopted. A hybrid exhaust turbine supercharger having a function (for example, a hybrid exhaust turbine supercharger disclosed in JP 2009-191794 A) can be employed.
As a result, the generator is rotated by the hybrid exhaust turbine supercharger, and the generator generates electric power. Therefore, the electric power generated by the generator can be used (utilized) as inboard power.

DESCRIPTION OF SYMBOLS 1 Ship 2 2 cycle engine 3 4 cycle engine 4 Denitration apparatus 6 Propeller shaft 7 Propeller 8 Shaft generator Motor 10 Generator 15 (1st hybrid) Exhaust turbine supercharger 18 (2nd hybrid) Exhaust turbine supercharger 21 Ship 22 Pod propeller 23 Pod 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)

A four-cycle engine that drives the generator,
A two-cycle engine that drives a propeller shaft with a propeller for propulsion attached at one end;
A denitration device through which only exhaust gas generated in the four-cycle engine is passed;
A shaft motor or a shaft generator motor provided with a function as an electric motor for rotating the propeller and the propeller shaft upon receiving electric power from the generator or a separately prepared power generator. To ship. A four-cycle engine that drives the generator,
A two-cycle engine that drives a propeller shaft with a propeller for propulsion attached at one end;
A denitration device through which only exhaust gas generated in the four-cycle engine is passed;
A marine vessel comprising: a pod propulsion unit having a built-in propeller driving mechanism for receiving a supply of electric power from the generator and driving a pod propeller. A four-cycle engine that drives a propeller shaft having a propeller for propulsion attached to one end via a reduction gear;
A two-cycle engine that drives the propeller and the propeller shaft via the speed reducer;
And a denitration device through which only exhaust gas generated by the four-cycle engine is passed. An exhaust gas generated by the four-cycle engine, or a steam turbine driven by steam generated by heat exchange between the exhaust gas generated by the four-cycle engine and the exhaust gas generated by the two-cycle engine;
The ship according to any one of claims 1 to 3, further comprising a second generator driven by the steam turbine. A power turbine driven by exhaust gas generated by the 4-cycle engine and / or exhaust gas generated by the 2-cycle engine;
The ship according to any one of claims 1 to 3, further comprising a second generator driven by the power turbine. A first hybrid exhaust turbine supercharger driven by exhaust gas generated by the two-cycle engine and / or a second hybrid exhaust turbine supercharger driven by exhaust gas generated by the four-cycle engine; The ship according to any one of claims 1 to 3, wherein the ship is provided. A four-cycle gas engine driving the generator,
A two-cycle engine that drives a propeller shaft with a propeller for propulsion attached at one end;
A shaft motor or a shaft generator motor provided with a function as an electric motor for rotating the propeller and the propeller shaft upon receiving electric power from the generator or a separately prepared power generator. To ship. A four-cycle gas engine driving the generator,
A two-cycle engine that drives a propeller shaft with a propeller for propulsion attached at one end;
A marine vessel comprising: a pod propulsion unit having a built-in propeller driving mechanism for receiving a supply of electric power from the generator and driving a pod propeller. A four-cycle gas engine that drives a propeller shaft having a propeller for propulsion attached to one end via a reduction gear;
A marine vessel comprising: the propeller and a two-cycle engine that drives the propeller shaft through the speed reducer. Steam turbine driven by steam generated by heat exchange between exhaust gas generated by the four-cycle gas engine, or exhaust gas generated by the four-cycle gas engine and exhaust gas generated by the two-cycle engine When,
The ship according to any one of claims 7 to 9, comprising a second generator driven by the steam turbine. A power turbine driven by exhaust gas generated by the four-cycle gas engine and / or exhaust gas generated by the two-cycle engine;
The ship according to any one of claims 7 to 9, comprising a second generator driven by the power turbine. The first hybrid exhaust turbine supercharger driven by exhaust gas generated by the two-cycle engine and / or the second hybrid exhaust turbine supercharger driven by exhaust gas generated by the four-cycle gas engine The ship according to any one of claims 7 to 9, characterized by comprising: A four-cycle engine that drives the generator,
A two-cycle engine that drives a propeller shaft with a propeller for propulsion attached at one end;
A denitration device through which only exhaust gas generated in the four-cycle engine is passed;
A ship operating method comprising a shaft motor or a shaft generator motor having a function as an electric motor for rotating the propeller and the propeller shaft upon receiving power from the generator or a separately prepared power generator. There,
Only the 4-cycle engine is operated in a specific sea area, and only the 2-cycle engine is operated outside the specific sea area, or the 2-cycle engine and the 4-cycle engine are used in combination. A ship operating method characterized by the above. A four-cycle engine that drives the generator,
A two-cycle engine that drives a propeller shaft with a propeller for propulsion attached at one end;
A denitration device through which only exhaust gas generated in the four-cycle engine is passed;
A method of operating a ship provided with a pod propulsion unit having a built-in propeller drive mechanism that receives power supply from the generator to drive a pod propeller,
Only the 4-cycle engine is operated in a specific sea area, and only the 2-cycle engine is operated outside the specific sea area, or the 2-cycle engine and the 4-cycle engine are used in combination. A ship operating method characterized by the above. A four-cycle engine that drives a propeller shaft having a propeller for propulsion attached to one end via a reduction gear;
A two-cycle engine that drives the propeller and the propeller shaft via the speed reducer;
A ship operation method comprising a denitration device through which only exhaust gas generated by the four-cycle engine is passed,
Only the 4-cycle engine is operated in a specific sea area, and only the 2-cycle engine is operated outside the specific sea area, or the 2-cycle engine and the 4-cycle engine are used in combination. A ship operating method characterized by the above. A four-cycle gas engine driving the generator,
A two-cycle engine that drives a propeller shaft with a propeller for propulsion attached at one end;
A ship operating method comprising a shaft motor or a shaft generator motor having a function as an electric motor for rotating the propeller and the propeller shaft upon receiving power from the generator or a separately prepared power generator. There,
Only the 4-cycle gas engine is operated in a specific sea area, and only the 2-cycle engine is operated outside the specific sea area, or the 2-cycle engine and the 4-cycle gas engine are used in combination. A method of operating a ship characterized by driving. A four-cycle gas engine driving the generator,
A two-cycle engine that drives a propeller shaft with a propeller for propulsion attached at one end;
A method of operating a ship provided with a pod propulsion unit having a built-in propeller drive mechanism that receives power supply from the generator to drive a pod propeller,
Only the 4-cycle gas engine is operated in a specific sea area, and only the 2-cycle engine is operated outside the specific sea area, or the 2-cycle engine and the 4-cycle gas engine are used in combination. A method of operating a ship characterized by driving. A four-cycle gas engine that drives a propeller shaft having a propeller for propulsion attached to one end via a reduction gear;
A marine vessel operation method comprising the propeller and a two-cycle engine that drives the propeller shaft via the speed reducer,
Only the 4-cycle gas engine is operated in a specific sea area, and only the 2-cycle engine is operated outside the specific sea area, or the 2-cycle engine and the 4-cycle gas engine are used in combination. A method of operating a ship characterized by driving.

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