WO2020202590A1 - Moving body - Google Patents

Abstract

Provided is a moving body equipped with a cooling device capable of efficiently cooling air supplied to a combustion means and capable of suppressing a reduction in the output of a gas turbine unit.　This moving body is equipped with a cooling device 20 used in the cooling of air supplied to a combustion means 6 and used in a power generation system E equipped with: a gas turbine unit G, which generates a combustion gas by burning in a combustion means 6 an air-fuel mixture of air and a fuel gas obtained by gasifying a liquid fuel, and rotationally drives the gas turbine 7 by means of the combustion gas generated by the combustion means 6; and a first power generation means 35, which uses the rotational force of the gas turbine 7 to generate power. The cooling device 20 is provided with at least two units among a first cooling unit 21, which uses as a cold heat source a heat medium used for gasifying the liquid fuel, a second cooling unit 22 which uses as a cold heat source a heat medium from a refrigeration machine 10, and a third cooling unit 23 which uses as a cold heat source seawater serving as a heat medium.

Description

Mobile

Regarding a moving body equipped with a cooling device used to cool the air supplied to the combustion means in the power generation system.

The combined cycle power generation system supplies the combustion gas generated by the combustion means to the gas turbine to rotate the gas turbine, and the generator generates electricity by the rotational force and exhausts the heat remaining in the exhaust gas from the gas turbine. This is a system in which a heat recovery boiler recovers steam to generate steam, the steam turbine is rotated by the generated steam, and a generator generates electricity by the rotational force.

This type of combined cycle power generation system is not only used in onshore power plants, but in recent years it is a system that can demonstrate high power generation efficiency, so its use outside of land is also being considered.

For example, Patent Document 1 discloses a ship power generation system mounted on a ship for the purpose of power generation on board. This ship power generation system is a power generation system installed on a ship such as an LNG ship, and like the above-mentioned combined cycle power generation system, generates rotational power by supplying combustion gas to a gas turbine to generate rotational power of the gas turbine. Along with generating electricity from the generator, steam is generated by recovering heat from the exhaust gas discharged from the gas turbine, and the generated steam is supplied to the steam turbine to generate rotational power, which is the rotational force of the steam turbine. The generator generates electricity.

Japanese Unexamined Patent Publication No. 2018-141381

By the way, in the gas turbine unit, the air is sucked and compressed, mixed with the fuel gas by the combustion means and burned, and the gas turbine is rotationally driven by the generated combustion gas, so that the generator generates power by this rotational force. When the temperature of the air supplied to the combustion means rises, the air density decreases, so that the mass of the air sent to the combustion means decreases, and as a result, the output decreases (in other words, the amount of power generation decreases). ).

Therefore, when trying to secure the required amount of power generation regardless of the temperature of the air supplied to the combustion means, it is necessary to take measures such as increasing the number of installed gas turbine units.

However, increasing the number of installed gas turbine units causes problems such as increased costs. In particular, in a power generation system installed on a moving body such as a ship such as the ship power generation system described in Patent Document 1, space saving of the power generation system is required due to the space on the moving body, so that the cost aspect Not only that, the expansion of the installation space is also a big problem.

On the other hand, as a method for improving the decrease in the output of the gas turbine unit, a method for lowering the temperature of the air supplied to the combustion means has been conventionally proposed. As such a method, for example, there is a method in which mist is generated in the intake chamber where the air is sucked, and the air sucked into the intake chamber cools the air supplied to the combustion means by taking away the latent heat of vaporization of the mist. ..

However, the method using mist can evaporate only the amount of mist up to the saturated steam pressure corresponding to the atmospheric temperature, so if the power generation system is installed in a hot and humid tropical region, or in a hot and humid environment in summer, the power generation system In the case of using the above, there is a problem that the air supplied to the combustion means cannot be sufficiently cooled, and it is difficult to obtain the effect of recovering the output.

In particular, with respect to a power generation system installed on a moving body such as a ship such as the ship power generation system described in Patent Document 1, the moving body often moves in a tropical region, and the effect of power recovery cannot be sufficiently obtained. In many cases.

In addition, as a method of lowering the temperature of the air supplied to the combustion means, a refrigerator is provided to produce cold water using the heat of combustion of fuel, and the heat using the cold water (cold heat source) produced by the refrigerator is provided. There is also a method in which a exchanger is installed in the intake chamber to cool the air supplied to the combustion means by this cold water.

However, in the method using the cold water from the refrigerator, when the refrigerator is to produce cold water capable of sufficiently cooling the air supplied to the combustion means, the gas turbine unit has a heat input to the refrigerator and an input power amount. There is a problem that the effect of output recovery is small and the energy efficiency of the entire power generation system is reduced. In addition, when trying to increase the amount of cold water to be produced, there is a problem that the size of the refrigerator is inevitably increased and the cost burden is large. Especially, the power generation system installed on the mobile body has a problem. Since space saving is required as described above, expansion of the installation space of the refrigerator is also a big problem.

In this way, the above method alone can save power generation systems while suppressing the problem that the effect of output recovery depends on the environment in which the power generation system is located and the decrease in energy efficiency of the entire power generation system. There is a problem that it is difficult to suppress a decrease in the output of the gas turbine unit while realizing space.

The present invention has been made in view of the above circumstances, and provides a moving body provided with a cooling device capable of efficiently cooling the air supplied to the combustion means and suppressing a decrease in the output of the gas turbine unit. Is the purpose.

The characteristic configuration of the moving body according to the present invention for achieving the above object is to generate a combustion gas by burning a mixture of fuel gas and air in which liquid fuel is vaporized by a combustion means, and generate the combustion gas by the combustion means. It is used in a power generation system including a gas turbine unit in which a gas turbine is rotationally driven by the generated combustion gas and a first power generation means for generating power by utilizing the rotational force of the gas turbine, and cooling of air supplied to the combustion means. It is a moving body equipped with a cooling device, which is used for
The cooling device
The first cooling unit that uses the heat medium used to vaporize the liquid fuel as a cold heat source, the second cooling unit that uses the heat medium from the refrigerator as a cold heat source, and seawater as a heat medium are used as cold heat sources. The point is that at least two of the third cooling units are provided.

According to the above characteristic configuration, a first cooling unit using a heat medium used for vaporizing liquid fuel as a cold heat source, a second cooling unit using a heat medium from a refrigerator as a cold heat source, and seawater as a heat medium. The air supplied to the combustion means is cooled in at least two cooling units of the third cooling unit using the above as a cooling heat source.

For example, when using only the cold heat of the cold water (cold heat source) from the refrigerator as in the past, there is a problem that the air cannot be sufficiently cooled only by the cold heat of the cold water from the refrigerator. Another problem is that if you try to produce cold water that can cool the air sufficiently, the energy efficiency of the entire power generation system will decrease, and if you try to increase the amount of cold water produced, the size of the refrigerator will inevitably increase. Was inevitable. However, in the above-mentioned characteristic configuration, by cooling the air supplied to the combustion means in at least two cooling units, as compared with the case where only the cold heat of the cold heat source from the refrigerator is used. The air supplied to the combustion means can be sufficiently cooled while suppressing the occurrence of the above-mentioned problems, and the effect of recovering the output of the power generation system can be easily obtained.

Further, since the present invention is a moving body provided with the above-mentioned cooling device, for example, by moving the moving body to a place where a combined cycle power generation system without a cooling device is installed, the moving body can be moved. A cooling device can be attached to this combined cycle power generation system, which makes it possible to suppress a decrease in the output of the gas turbine unit.

Further, a further characteristic configuration of the moving body according to the present invention is that the cooling device includes the first cooling unit and the second cooling unit.

According to the above characteristic configuration, in the first cooling unit, the air supplied to the combustion means is cooled by using the heat medium used for vaporizing the liquid fuel as a cooling heat source, and the air is supplied to the second cooling unit. , The heat medium from the refrigerator is used as a cooling heat source for cooling.

In a power generation system that generates power using a liquid fuel, a heat medium that has taken cold heat from the liquid fuel is inevitably generated when the liquid fuel is vaporized. Therefore, the heat medium that has taken cold heat from the liquid fuel is burned. By using it as a cold heat source for cooling the air supplied to the means, the cold heat of the liquid fuel can be effectively utilized.
Further, unlike the case where only the cold heat of the cold heat source from the refrigerator is used as described above, in the above characteristic configuration, not only the cooling by the cold heat source from the refrigerator but also the cold heat of the liquid fuel is used. By using the same cooling together, it is not necessary to cool the air only by cooling with the cold heat of the cold water from the refrigerator. Therefore, even if the air supplied to the combustion means is sufficiently cooled to obtain the effect of recovering the output of the power generation system, the decrease in energy efficiency of the entire power generation system can be suppressed and the size of the refrigerator can be avoided. Therefore, it is possible to reduce the burden on the cost and save the space of the power generation system.

As described above, according to the moving body having the above-mentioned characteristic configuration, the cold heat of the liquid fuel can be effectively utilized to cool the air supplied to the combustion means, and the decrease in energy efficiency of the entire power generation system can be suppressed. At the same time, it is possible to cool the air supplied to the combustion means while reducing the cost burden and space saving of the power generation system, which makes it possible to suppress a decrease in the output of the gas turbine unit. ..

Further, a further characteristic configuration of the moving body according to the present invention is that the cooling device is such that the air supplied to the combustion means flows in the order of the second cooling unit and the first cooling unit. The point is that the second cooling unit is arranged.

The heat medium used as a cold heat source in the first cooling unit is used for vaporizing the liquid fuel, and the temperature is extremely low by obtaining a considerable amount of cold heat.
On the other hand, the heat medium used as a cold heat source in the second cooling unit is cold water produced by a refrigerator, and the temperature is relatively higher than that of the heat medium used in the first cooling unit. There is a tendency.
Therefore, according to the above characteristic configuration, the air supplied to the combustion means is cooled in the second cooling unit where the temperature of the heat medium used is relatively high, and then the temperature of the heat medium used is relatively low. Since cooling is performed in the cooling unit, the air can be cooled without wasting the cold heat of each heat medium used in the two cooling units as much as possible.

Further, a further characteristic configuration of the moving body according to the present invention is that the cooling device includes the first cooling unit and the third cooling unit.

According to the above characteristic configuration, in the first cooling unit, the air supplied to the combustion means is cooled by using the heat medium used for vaporizing the liquid fuel as a cooling source, and the air is supplied to the third cooling unit. , Seawater as a heat medium is cooled as a cold heat source.

Similar to the above, in the first cooling section, the cold heat of the liquid fuel is effectively utilized by using a heat medium that has taken away the cold heat that is inevitably generated in the system that generates electricity using the liquid fuel as a cold heat source. It can be used.
In addition, even if the temperature of the air cannot be lowered to a temperature that can suppress the decrease in the output of the power generation system only by the cold heat obtained by vaporizing the liquid fuel consumed by the power generation system during power generation, the third cooling In the unit, the temperature can be lowered by cooling the air supplied to the combustion means with the cold heat of seawater. This makes it easier to suppress a decrease in the output of the power generation system.
Further, since the refrigerator is not required in this feature configuration, the problem of increasing the size of the refrigerator does not occur, the burden on the cost can be reduced, and the space of the power generation system can be saved.

In this way, even a moving body having the above-mentioned characteristic configuration can effectively utilize the cold heat of the liquid fuel to cool the air supplied to the combustion means, and reduce the energy efficiency of the entire power generation system. In addition to suppressing the cost burden, the space of the power generation system can be reduced, and the air supplied to the combustion means can be cooled, whereby the output decrease of the gas turbine unit can be suppressed.

Further, a further characteristic configuration of the moving body according to the present invention is that the cooling device is such that the air supplied to the combustion means flows in the order of the third cooling unit and the first cooling unit. The point is that the third cooling unit is arranged.

As described above, the heat medium used as a cold heat source in the first cooling unit obtains a considerable amount of cold heat from the liquid fuel, and its temperature is extremely low.
On the other hand, the temperature of seawater used as a cold heat source in the third cooling section is relatively higher than that of the heat medium used as a cold heat source in the first cooling section, although it depends on the sampling depth. There is a tendency.
Therefore, according to the above characteristic configuration, the air supplied to the fuel means is cooled in the third cooling unit where the temperature of the heat medium used is relatively high, and then the temperature of the heat medium used is relatively low. Since cooling is performed in the cooling unit, the air can be cooled without wasting the cold heat of each heat medium used in the two cooling units as much as possible.

Further, a further characteristic configuration of the moving body according to the present invention is that the cooling device includes the second cooling unit and the third cooling unit.

According to the above characteristic configuration, the air supplied to the combustion means is cooled by using the heat medium from the refrigerator as a cooling heat source in the second cooling unit, and the air is used as a heat medium in the third cooling unit. It is cooled using seawater as a cold heat source.

Unlike the case where only the cold heat of the cold heat source from the refrigerator is used as described above, in the above characteristic configuration, not only the cooling by the cold heat source from the refrigerator but also the cooling using the cold heat of seawater is used. By using the above together, it is not necessary to cool the air only by cooling with the cold heat of the cold water from the refrigerator. Therefore, even if the air supplied to the combustion means is sufficiently cooled to obtain the effect of recovering the output of the power generation system, the decrease in energy efficiency of the entire power generation system can be suppressed and the size of the refrigerator can be avoided. Therefore, it is possible to reduce the burden on the cost and save the space of the power generation system.

As described above, according to the moving body having the above-mentioned characteristic configuration, the combustion is performed after suppressing the decrease in the energy efficiency of the entire power generation system, reducing the burden on the cost, and saving the space of the power generation system. The air supplied to the means can be cooled, which can suppress a decrease in the output of the gas turbine unit.

Further, a further characteristic configuration of the moving body according to the present invention is that the cooling device has the second and second cooling devices so that the air supplied to the combustion means flows in the order of the third cooling section and the second cooling section. The point is that the third cooling unit is arranged.

The temperature of the seawater used as the cold heat source in the third cooling section tends to be relatively higher than that of the cold water from the refrigerator used as the cold heat source in the second cooling section, although it depends on the sampling depth. ..
Therefore, according to the above characteristic configuration, the air supplied to the combustion means is cooled in the third cooling unit where the temperature of the heat medium used is relatively high, and then the temperature of the heat medium used is relatively low. Since cooling is performed in the cooling unit, the air can be cooled without wasting the cold heat of each heat medium used in the two cooling units as much as possible.

Further, a further characteristic configuration of the moving body according to the present invention is that the cooling device includes the first cooling unit, the second cooling unit, and the third cooling unit.

According to the above characteristic configuration, the first cooling unit that uses the heat medium used to vaporize the liquid fuel as a cold heat source, the second cooling unit that uses the heat medium from the refrigerator as a cold heat source, and seawater. The air supplied to the combustion means is cooled in the third cooling unit used as a cold heat source.

By cooling the air supplied to the combustion means in the first, second, and third cooling units in this way, for example, the cold heat obtained by vaporizing the liquid fuel consumed by the power generation system during power generation can be obtained. The temperature of the air supplied to the combustion means can be suppressed from the decrease in the output of the power generation system only by the cold heat of each heat medium used in any two of the three cooling units due to insufficient reasons. Even in cases where the temperature cannot be lowered to such a temperature, by providing three cooling units, the air supplied to the combustion means is cooled by the cold heat of each heat medium used in these three cooling units. The temperature can be lowered. As a result, the decrease in the output of the power generation system can be further suppressed.

Further, a further characteristic configuration of the moving body according to the present invention is that in the cooling device, the air supplied to the combustion means circulates in the order of the third cooling unit, the second cooling unit, and the first cooling unit. The point is that the first, second and third cooling units are arranged.

As described above, the temperature of seawater used as a cold heat source in the third cooling section is higher than that of the heat medium used as a cold heat source in the first cooling section and the second cooling section, although it depends on the sampling depth. The temperature tends to be relatively high, and the heat medium used as a cold heat source in the second cooling section tends to have a relatively high temperature as compared with the heat medium used in the first cooling section. ..
Therefore, according to the above-mentioned characteristic configuration, the air supplied to the combustion means is cooled in the order of the cooling unit having the highest relative temperature of the heat medium to be used, that is, after cooling in the third cooling unit, the second cooling unit. Since the cooling is performed in the first cooling unit and then cooled in the first cooling unit, the air can be cooled without wasting the cooling heat of each of the heat media used in the three cooling units as much as possible.

Further, a further characteristic configuration of the moving body according to the present invention is a fuel tank in which the liquid fuel is stored and a fuel tank.
A vaporization unit that vaporizes the liquid fuel by using the heat medium used in the first cooling unit as a heat source.
With the gas turbine unit
The point is that the first power generation means is provided.

According to the above characteristic configuration, the moving body is a moving body including a cooling device, a fuel tank, a vaporization unit, a gas turbine unit, and a first power generation means. In this moving body, the gas turbine unit The first power generation means generates electricity by the rotational force of the gas turbine. By providing the above-mentioned cooling device, the moving body having such a configuration suppresses the decrease in energy efficiency of the entire power generation system, reduces the burden on the cost, and saves the space of the power generation system. On top of that, the air supplied to the combustion means can be cooled, whereby a decrease in the output of the gas turbine unit can be suppressed, and power generation can be efficiently performed.
Further, in the moving body according to the present invention, even if the area where the moving body is moving or stopped is a tropical region, the air supplied to the combustion means is cooled by the above cooling device, and mist is generated as in the conventional case. Since it is not used, the effect of recovering the output of the power generation system can be obtained.

Further, a further characteristic configuration of the moving body according to the present invention is an exhaust heat recovery boiler unit that vaporizes water by exhaust gas from the gas turbine unit.
A steam turbine unit in which the steam turbine is rotationally driven by steam vaporized in the exhaust heat recovery boiler unit, and
A second power generation means for generating power by utilizing the rotational force of the steam turbine is provided.
It is a ship.

According to the above-mentioned characteristic configuration, the moving body becomes a ship further provided with the exhaust heat recovery boiler unit, the above-mentioned turbine unit, and the second power generation means (in other words, a ship equipped with a combined cycle power generation system), and this movement In the body ship, the steam turbine is rotationally driven by utilizing the heat of the exhaust gas from the gas turbine unit, and the rotational force of the steam turbine also generates electricity by the second power generation means. Therefore, it is possible to efficiently generate electricity by effectively utilizing the heat of the exhaust gas from the gas turbine unit.
Further, in the moving body according to the present invention, even if the area where the moving ship is navigating or anchoring is often in the tropics, the air supplied to the combustion means is cooled by the above cooling device. Since the mist is not used as in the above, the effect of recovering the output of the power generation system can be obtained.

Further, a further characteristic configuration of the moving body according to the present invention is that the cooling device includes a third cooling unit that uses seawater as a heat medium as a cold heat source.
The steam turbine unit includes a condenser that recovers steam used for rotationally driving the steam turbine as condensate.
The point is that the seawater used in the third cooling unit is used as a cold heat source, and a condensate cooling unit for cooling the inside of the condenser is provided.

According to the above characteristic configuration, the seawater used in the third cooling unit is used as a cooling heat source, the inside of the condenser is cooled in the condensate cooling unit, and the steam discharged from the steam turbine is used in the condenser. It can be cooled inside and recovered as condensate.
Therefore, it is possible to share a part of the seawater pipes for supplying seawater to the third cooling part and the condensate cooling part and recovering seawater from these cooling parts, so that the arrangement of the pipes can be simplified. , The number of pumps required to distribute seawater in the pipe can be reduced.

Further, a further characteristic configuration of the moving body according to the present invention is a first seawater flow path through which the seawater supplied to the third cooling unit flows.
A second seawater flow path through which the seawater supplied from the third cooling unit to the condensate cooling unit flows,
A bypass flow path connecting the first seawater flow path and the second seawater flow path,
The point is that it is provided with an adjusting means for adjusting the amount of the seawater flowing through the bypass flow path.

When the temperature difference between the seawater supplied to the third cooling unit and the outside air sucked in to supply the combustion means is small, the air is cooled even if the amount of seawater supplied to the third cooling unit is small. It is difficult to make a difference in the effect, but even in such a case, it is an unnecessary increase in pump output to always distribute the entire amount of seawater pumped by the pump to the condensate cooling section via the third cooling section. Connect. Further, when the temperature of the seawater is higher than the temperature of the outside air, the air may be heated by supplying the seawater to the third cooling unit.
According to the above characteristic configuration, a bypass flow path connecting the first seawater flow path and the second seawater flow path is provided, and the amount of seawater flowing through the bypass flow path is adjusted by the adjusting means to adjust the third cooling unit. The amount of seawater flowing to the condensate cooling section via the above and the amount of seawater flowing to the condensate cooling section through the bypass flow path without passing through the third cooling section can be adjusted.
Therefore, by adjusting the amount of seawater flowing through the bypass flow path according to the amount of seawater required by the third cooling unit, it is possible to suppress an unnecessary increase in pump output. In addition, when the temperature of seawater is higher than the temperature of the outside air, the total amount of seawater pumped up by the pump is adjusted so that it flows through the bypass flow path so that seawater is not supplied to the third cooling unit. , It is also possible to prevent the situation where the air is heated.

Further, a further characteristic configuration of the moving body according to the present invention is to determine the number of operating gas turbine units based on the power demand and the operating state of the cooling device.

According to the above feature configuration, it is possible to operate the number of gas turbine units that meet the power demand without unnecessarily increasing the number of operating gas turbine units.

The operating state of the cooling device changes depending on the degree of cooling of the air supplied to the combustion means in each of the first cooling part, the second cooling part, and the third cooling part, and the degree of cooling of the air by each cooling part is determined. By changing it, the operating state of the cooling device can be changed as appropriate. Further, the degree of cooling of air by each cooling unit can be changed by changing the temperature of the heat medium supplied to the cooling unit or by starting or stopping the supply of the heat medium to the cooling unit.
Further, the electric power demand in the present application means the electric power required by the mobile body, the electric power required by one or more facilities to which the electric power is supplied from the mobile body, and the power generation system for the purpose of storing electricity. It is a concept that includes electric power to be generated.

Further, a further characteristic configuration of the moving body according to the present invention is to determine the operating state of the cooling device based on the electric power demand and the output characteristics of the gas turbine unit.

According to the above-mentioned feature configuration, the cooling device can be operated in an appropriate operating state that meets the power demand, and it is possible to prevent the cooling device from being loaded more than necessary.

Further, a further characteristic configuration of the moving body according to the present invention is that the cooling device includes the first cooling unit and at least one of the second cooling unit and the third cooling unit.
With the air supplied to the combustion means cooled by the first cooling unit, at least one of the second cooling unit and the third cooling unit is used based on the power demand and the output characteristics of the gas turbine unit. The point is that the operating state of the cooling device is determined by determining the degree of cooling of the air supplied to the combustion means.

According to the above characteristic configuration, in a state where the air is cooled by the first cooling unit, the air by at least one of the second cooling unit and the third cooling unit is based on the power demand and the output characteristics of the gas turbine unit. The degree of cooling can be determined, and the operating state of the cooling device can be determined. Therefore, the operating state of the cooling device determined in this way is an operating state in which the cold heat of the liquid fuel is effectively utilized.

In the above characteristic configuration, the air supplied to the combustion means is cooled by the first cooling unit, and the combustion is performed by the second cooling unit and the third cooling unit based on the power demand and the output characteristics of the gas turbine unit. By determining the degree of cooling of the air supplied to the means, the operating state of the cooling device is determined, and with the air supplied to the combustion means cooled by the first cooling unit, the power demand and the output characteristics of the gas turbine unit. By determining the degree of cooling of the air supplied to the combustion means by the second cooling unit based on the above, the operating state of the cooling device is determined, and the air supplied to the combustion means is cooled by the first cooling unit. This includes determining the operating state of the cooling device by determining the degree of cooling of the air supplied to the combustion means by the third cooling unit based on the power demand and the output characteristics of the gas turbine unit. ..

Further, a further characteristic configuration of the moving body according to the present invention is that the cooling device includes the first cooling unit, the second cooling unit, and the third cooling unit.
With the air supplied to the combustion means cooled by the first cooling unit and the third cooling unit, the combustion means by the second cooling unit is based on the power demand and the output characteristics of the gas turbine unit. By determining the degree of cooling of the air supplied to the cooling device, the operating state of the cooling device is determined.

According to the above characteristic configuration, in a state where the air is cooled by the first cooling unit and the third cooling unit, the degree of cooling of the air by the second cooling unit is determined based on the power demand and the output characteristics of the gas turbine. The operating state of the cooling device can be determined. Therefore, the operating state of the cooling device determined in this way is an operating state in which the cold heat of the liquid fuel is effectively utilized.

Further, a further characteristic configuration of the moving body according to the present invention determines the operating state of the cooling device according to at least one of the air condition and the cooling device condition, and the first cooling unit. The point is to determine the degree of cooling of the air supplied to the combustion means by at least one of the second cooling unit and the third cooling unit.

According to the above characteristic configuration, it is possible to determine the degree of cooling of air by each cooling unit after determining the operating state of the cooling device according to the atmospheric condition. Therefore, for example, after determining the state in which the air is not cooled by any one of the first to third cooling units as the operating state of the cooling device, the degree of cooling of the air by the other cooling units is determined. You can decide and operate the cooling system. The atmospheric condition is the atmospheric temperature, atmospheric pressure, humidity, etc., and the condition of the cooling device is the presence or absence of a failure, the temperature of the seawater used, the amount of LNG used, and the like.

It is a figure which shows the schematic structure of the power generation system mounted on a ship which concerns on 1st Embodiment. It is a figure which shows the schematic structure of the refrigerator. It is a figure which shows the schematic structure of the power generation system mounted on a ship which concerns on 2nd Embodiment. It is a graph which shows the output characteristic of a gas turbine unit. It is a graph which shows the efficiency characteristic of a gas turbine unit.

[First Embodiment]
Hereinafter, the moving body according to the first embodiment of the present invention will be described with reference to the drawings. In this embodiment, a case where the moving body is a ship will be described as an example.

FIG. 1 is a diagram showing a schematic configuration of a power generation system E mounted on a ship (LNG carrier). As shown in the figure, the power generation system E uses a fuel tank 1 in which liquefied natural gas (LNG) as a liquid fuel is stored and water as a heat medium to vaporize the LNG into a fuel gas. A mixture of the vessel 2 (vaporizer) and fuel gas and air is burned by the combustor 6 (combustion means) to generate combustion gas, and the combustion gas generated by the combustor 6 rotates the gas turbine 7. Utilizing the gas turbine unit G to be driven, the refrigerating machine 10 for producing water as a cold heat source, the cooling device 20 for cooling the air supplied to the combustor 6, and the heat of the exhaust gas discharged from the gas turbine unit G. The exhaust heat recovery boiler unit 25 that vaporizes water to generate steam, the steam turbine unit S in which the steam turbine 30 is rotationally driven by the steam vaporized by the exhaust gas from the gas turbine unit G, and the rotational force of the gas turbine 7. It includes a first generator 35 (first power generation means) that uses it to generate electricity, and a second generator 36 (second power generation means) that uses the rotational force of the steam turbine 30 to generate power.

The fuel tank 1 is connected to the other end of the fuel supply path L1 whose one end is connected to the combustor 6 in the gas turbine unit G, and the vaporizer 2 is arranged in the fuel supply path L1. .. Further, the vaporizer 2 is a heat exchanger in which a vaporization medium supply path L2 through which water as a heat source flows and a first cooling medium supply path L3 through which water obtained with cold heat from LNG flows are connected. The LNG supplied from the inside of the fuel tank 1 is heated and vaporized by the heat of the water supplied through the vaporization medium supply path L2 in the vaporizer 2, and is supplied to the combustor 6 as a fuel gas. ..

The gas turbine unit G has a compressor 5, a combustor 6, and a gas turbine 7. The compressor 5 is rotationally driven by the gas turbine 7, and the air cooled by the cooling device 20 described later is supplied through the first air supply path L10, and the supplied air is compressed and sent out to the combustor 6. It is configured. Further, the combustor 6 burns a mixture of fuel gas supplied through the fuel supply path L1 and compressed air supplied from the compressor 5 through the second air supply path L11 to generate combustion. The gas is sent to the gas turbine 7 through the combustion gas supply path L12. The gas turbine 7 is rotationally driven by the combustion gas sent from the combustor 6, and the rotational force is transmitted to the compressor 5 and the first generator 35. Further, the combustion gas used to drive the rotation of the gas turbine 7 is sent out as exhaust gas to the exhaust heat recovery boiler unit 25, which will be described later, through the exhaust gas supply path L13.

The refrigerator 10 in the present embodiment is a so-called absorption chiller, and as shown in FIG. 2, includes an evaporator 11, a absorber 13, a regenerator 15 and a condenser 17.

The evaporator 11 is provided inside the second cooling medium supply path L4 through which water supplied as a cooling heat source to the second cooling section 22 of the cooling device 20 described later flows, and the second cooling medium supply path L4. A cooling medium recovery path L5 through which water that has been connected and has been deprived of cold heat flows is arranged in the second cooling unit 22, and water stored in the evaporator 11 is pumped up by a pump (not shown). A first spraying means 12 for spraying is provided in the evaporator 11. Further, the evaporator 11 is in a state of communicating with the absorber 13 via a passage, and the inside of the evaporator 11 and the absorber 13 is depressurized by a vacuum pump (not shown). In the evaporator 11, the water sprayed by the first spraying means 12 is evaporated at a low temperature of about 5 ° C. under reduced pressure to cool the water flowing through the cooling medium recovery path L5, thereby cooling the water. (Ii) Water having cold heat used as a cold heat source is produced in the cooling unit 22. The water evaporated at low temperature (that is, water vapor) moves to the absorber 13 through the passage.

The absorber 13 stores an absorbing liquid (for example, an aqueous solution of lithium bromide) inside the absorber 13 and sprays a high-concentration absorbing liquid heated in the regenerator 15 described later into the absorber 13. The second spraying means 14 is arranged. In the absorber 13, the high-concentration absorption liquid sprayed by the second spraying means 14 is cooled by the refrigerant, and the water vapor generated in the evaporator 11 is absorbed by the cooled absorption liquid.

In the regenerator 15, the absorbent liquid stored in the absorber 13 is pumped up by a pump (not shown) and supplied, so that the supplied absorbent liquid is heated by the heating means 16. It has become. The heating means 16 is not particularly limited as long as it can heat the absorbing liquid, and examples thereof include those using the heat of combustion of fuel gas and the heat of an electric heater. In the regenerator 15, the water vapor absorbed by the absorbent liquid in the absorber 13 is separated by heating the absorbent liquid supplied from the absorber 13. The separated water vapor moves to the condenser 17 which is in a state of being communicated with the regenerator 15 via the passage.

In the condenser 17, the water vapor separated by the regenerator 15 is cooled by the refrigerant, and the condensed water is supplied to the evaporator 11. For cooling the high-concentration absorbing liquid in the absorber 13 and cooling the water vapor in the condenser 17, the cold heat of the refrigerant (for example, water) supplied from the outside as appropriate is used to cool the absorber 13 and the condenser. A refrigerant flow path La through which this refrigerant flows passes through the inside of the 17.

The water as a cold heat source produced in the evaporator 11 of the refrigerator 10 may be used only by the second cooling unit 22, but is used for the air conditioner provided on the ship. Is also good. That is, the flow paths branched from the second cooling medium supply path L4 and the cooling medium recovery path L5 connected to the evaporator 11 are appropriately connected to the air conditioner, and serve as a cooling heat source through the second cooling medium supply path L4. The water may be supplied to the air conditioner, and the water from which the cold heat has been deprived in the air conditioner may be recovered through the cooling medium recovery path L5.

The cooling device 20 is configured to cool the air flowing through the first air supply path L10 (air supplied to the combustor 6). Specifically, in the present embodiment, the cooling device 20 uses the first cooling unit 21 that uses water as a heat medium used for vaporizing LNG as a cold heat source, and the water produced by the refrigerator 10. A second cooling unit 22 used as a cold heat source and a third cooling unit 23 using seawater as a heat medium as a cold heat source are provided.

The first cooling unit 21 is a heat exchanger to which the vaporization medium supply path L2 and the first cooling medium supply path L3 are connected, and water as a heat medium is a heat exchanger between the vaporizer 2 and the first cooling unit 21. It circulates between them through the vaporization medium supply path L2 and the first cooling medium supply path L3. The first cooling unit 21 cools the air supplied to the combustor 6 by the cold heat of the water supplied through the first cooling medium supply path L3 (that is, the water obtained from the LNG).

The second cooling unit 22 is a heat exchanger to which the second cooling medium supply path L4 and the cooling medium recovery path L5 are connected, and the water as the heat medium is the evaporator 11 of the refrigerator 10 and the second cooling. It circulates with the unit 22 through the second cooling medium supply path L4 and the cooling medium recovery path L5. The second cooling unit 22 cools the air supplied to the combustor 6 by the cold heat of the water supplied through the second cooling medium supply path L4 (that is, the water produced by the refrigerator 10 and obtained cold heat). To do.

The third cooling unit 23 supplies seawater to which the seawater supplied from the condensate cooling unit 32, which will be described later, flows through the first seawater supply channel L6 (first seawater channel) through which the seawater pumped from the sea by the pump P1 flows. It is a heat exchanger connected to the passage L7 (second seawater flow path). The third cooling unit 23 cools the air supplied to the combustor 6 by the cold heat of seawater as a cold heat source supplied through the first seawater supply path L6. A bypass flow path L8 connecting the first seawater supply path L6 and the second seawater supply path L7 is connected between the pump P1 and the third cooling unit 23 in the first seawater supply path L6.

Further, an adjusting device 24 (adjusting means) is provided at a connection point of the bypass flow path L8 in the first seawater supply path L6, and the adjusting device 24 adjusts the amount of seawater flowing through the bypass flow path L8. You can do it.

Further, in the present embodiment, the cooling units 21, 22, and 23 are the third cooling unit 23, the second cooling unit 22, and the first cooling unit 21 from the upstream side in the flow direction of the air flowing to the combustor 6. The air is arranged in this order, and the air sucked into the first air supply passage L10 is cooled in the order of the third cooling unit 23, the second cooling unit 22, and the first cooling unit 21.

The exhaust heat recovery boiler unit 25 is used to rotate and drive the gas turbine 7, and is configured to recover the heat of the exhaust gas discharged from the gas turbine 7. Specifically, in the present embodiment, the exhaust heat recovery boiler unit 25 heats and vaporizes the water in the plurality of drums 26 by the heat of the exhaust gas from the gas turbine 7 to produce steam. Then, this steam is sent to the steam turbine 30 of the steam turbine unit S through the steam supply path L14. The exhaust gas from which the heat has been recovered is appropriately discharged to the outside.

The steam turbine unit S includes a steam turbine 30, a condenser 31, and a condenser cooling unit 32. The steam turbine 30 is rotationally driven by the steam sent from the exhaust heat recovery boiler unit 25, and the rotational force is transmitted to the second generator 36. Further, the condenser 31 is provided with a condenser cooling unit 32 inside, and the steam used to drive the rotation of the steam turbine 30 is returned to water in the condenser 31 to supply water. It is supplied to the drum 26 through the road L15. The condensate cooling unit 32 is a heat exchanger in which the second seawater supply path L7 and the seawater discharge path L9 for discharging seawater to the sea are connected, and the cold heat of the seawater supplied through the second seawater supply path L7. The inside of the condenser 31 is cooled by, and the seawater used for cooling the inside of the condenser 31 is discharged to the sea through the seawater discharge path L9. In the present embodiment, in the condensate cooling unit 32, when the temperature of the seawater supplied through the second seawater supply path L7 is about 32 ° C., the temperature of the seawater used for cooling the inside of the condenser 31 is It will be about 42 ° C.

The first generator 35 is driven by the gas turbine 7 to generate electricity, and the second generator 36 is driven by the steam turbine 30 to generate electricity.

In the moving body having the above configuration, the fuel gas vaporized in the vaporizer 2 is supplied to the combustor 6, and the air cooled in the cooling device 20 is supplied to the combustor 6 in the combustor 6. , A mixture of fuel gas and air is burned, and the generated combustion gas is sent to the gas turbine 7, so that the gas turbine 7 is rotationally driven, and the rotational force drives the first generator 35. And power is generated.

Further, in this moving body, the combustion gas used to drive the rotation of the gas turbine 7 is sent to the exhaust heat recovery boiler unit 25 as exhaust gas, and the steam is generated in the exhaust heat recovery boiler unit 25 by utilizing the heat of the exhaust gas. When the steam is produced and sent to the steam turbine 30, the steam turbine 30 is rotationally driven, and the rotational force drives the second generator 36 to generate power.

According to the ship provided with the power generation system E according to the present embodiment, since the air supplied to the combustor 6 is cooled by the cooling device 20, the output of the power generation system E is reduced (in other words, the amount of power generation is reduced). Can be suppressed. Further, in the case where a plurality of gas turbine units G are installed on a ship, since the decrease in the output of the power generation system E can be suppressed by providing the cooling device 20, the gas turbine unit G required to obtain the same electric power It is possible to reduce the number of installed turbines, and it is possible to reduce equipment costs, maintenance costs, and installation space.

Further, since the cooling device 20 in the present embodiment is used as a cooling heat source for cooling the air that supplies the combustor 6 with the heat medium that has taken the cold heat from the LNG, which is inevitably generated when the LNG is vaporized. The cold heat of LNG can be effectively utilized.

Further, since the air supplied to the combustor 6 is cooled in the three cooling units 21, 22, 23, there is a problem that the energy efficiency of the entire power generation system E is lowered, and the size of the refrigerator 10 is increased. The combustor solves the problem that the output of the power generation system E decreases due to the inevitable problem and the lack of cooling heat obtained by vaporizing the LNG consumed by the power generation system E during power generation. The air supplied to No. 6 can be sufficiently cooled to suppress a decrease in the output of the power generation system E.

Here, the water used as a cold heat source in the first cooling unit 21 is used for vaporizing LNG. In the present embodiment, as shown in FIG. 1, when the temperature of LNG is about −160 ° C., when LNG is vaporized by the water used in the first cooling unit 21 to make a fuel gas of about 10 ° C., heat is generated. Water as a medium obtains a considerable amount of cold heat, and if the temperature before obtaining the cold heat is about 13 ° C., the temperature after obtaining the cold heat is about 5 ° C.

On the other hand, the water used as the cold heat source in the second cooling unit 22 is produced by the refrigerator 10, and the temperature is relatively higher than the water used in the first cooling unit 21. In this embodiment, as shown in FIG. 1, the temperature at the time of supplying to the second cooling unit 22 is about 7 ° C., and after the second cooling unit 22 is deprived of cold heat by the air. The temperature at is about 15 ° C.

The seawater used as a cold heat source in the third cooling unit 23 depends on the sampling depth, but if it is pumped from a depth of 30 m to 70 m, it is about 20 to 30 ° C., as shown in FIG. As shown, in the present embodiment, the temperature is about 25 ° C., and the temperature after the cold heat is taken away by the air in the third cooling unit 23 is about 32 ° C.

In the present embodiment, the third cooling unit 23, the second cooling unit 22, and the first cooling unit 21 are arranged in this order from the upstream side in the flow direction of the air flowing to the combustor 6, so that the first air is supplied. The air sucked into the passage L10 (35 ° C. in this embodiment) is cooled in the order of the cooling units 21, 22, 23 in which the temperature of the heat medium to be used is relatively high, that is, the third cooling unit 23 first. By cooling in, the temperature becomes about 30 ° C., then in the second cooling unit 22, the temperature becomes about 20 ° C., and then in the first cooling unit 21, the air supplied to the combustor 6 is supplied. Finally, it can be cooled to about 15 ° C., and the air can be efficiently cooled without wasting the cold heat of each heat medium used by the three cooling units 21, 22, 23 as much as possible.

Further, in the present embodiment, a part of the seawater piping (that is, for supplying seawater to the third cooling unit 23 and the condensate cooling unit 32 and collecting seawater from these cooling units 23 and 32 (that is,). , The first seawater supply route L6, the second seawater supply route L7, and the seawater discharge route L9) are shared, which simplifies the arrangement of pipes and increases the number of pumps P1 for distributing seawater. Only one unit is needed.

Further, in the present embodiment, a bypass flow path L8 connecting the first seawater supply path L6 and the second seawater supply path L7 is provided so that the amount of seawater flowing through the bypass flow path L8 can be adjusted by the adjusting device 24. By doing so, there are the following advantages.

For example, when the temperature difference between the air sucked into the first air supply path L10 and the seawater used by the third cooling unit 23 is small, the air can be supplied even if the amount of seawater supplied to the third cooling unit 23 is small. Although it is difficult to make a difference in the cooling effect, flowing seawater to the condensate cooling unit 32 via the third cooling unit 23 leads to an unnecessary increase in the pump output even in such a case. Further, when the temperature of the sucked air is higher than the temperature of the seawater, the air may be heated by supplying the seawater to the third cooling unit 23.

However, in the moving body according to the present embodiment, an unnecessary increase in the output of the pump P1 can be suppressed by adjusting the amount of seawater flowing through the bypass flow path L8 by the adjusting device 24 as needed. .. Further, in the moving body according to the present embodiment, the temperature of the seawater is higher than the temperature of the air by adjusting the total amount of the seawater pumped by the pump P1 so as to flow through the bypass flow path L8 by the adjusting device 24. Even in such a case, it is possible to prevent a situation in which the air is heated by seawater.

[Second Embodiment]
Next, the moving body according to the second embodiment of the present invention will be described. In this embodiment as well, the case where the moving body is a ship will be described as an example. Further, the same components as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

FIG. 3 is a diagram showing a schematic configuration of a power generation system E1 mounted on a ship (LNG carrier). As shown in the figure, the power generation system E1 includes a vaporizer 2, a plurality of gas turbine units Ga and Gb, a refrigerator 10, a plurality of cooling devices 20a and 20b, and a plurality of exhaust heat recovery boiler units 25a. It includes 25b and a steam turbine unit S. Further, the power generation system E1 includes a control device 40 and a temperature sensor Tb for detecting the atmospheric temperature. Although not shown, the mobile power generation system E1 according to the second embodiment also includes a fuel tank in which liquefied natural gas is stored and the rotational force of the gas turbines 7a and 7b of the gas turbine units Ga and Gb. A first power generation means for generating power by utilizing the above, and a second power generation means for generating power by utilizing the rotational force of the steam turbine 30 are provided. In addition, in FIG. 3, a configuration in which two of each of a plurality of gas turbine units, a plurality of cooling devices, and a plurality of exhaust heat recovery boiler units are provided is shown.

In the second embodiment, a fuel regulating valve V1 is provided between the fuel tank and the vaporizer 2 in the fuel supply path L1, and the opening / closing operation of the fuel regulating valve V1 is the operation of the electric power demand and the gas turbine unit. It is controlled by the control device 40 based on the state and the like.

In the second embodiment, the vaporization medium supply path L2 connected to the vaporizer 2 is branched into the vaporization medium supply paths L2a and L2b on the upstream side thereof, and the first cooling is also connected to the vaporizer 2. The media supply path L3 is branched into the first cooling medium supply paths L3a and L3b on the downstream side thereof. Further, the cooling medium supply path L3 is provided with a heat exchanger 37 and a buffer tank 38 in this order from the upstream side. The heat exchanger 37 is for exchanging heat between the water obtained from LNG in the vaporizer 2 and the seawater appropriately pumped from the sea, and the buffer tank 38 is used at the time of starting the power generation system E1. This is for temporarily storing the water supplied to the first cooling units 21a and 21b.

The two gas turbine units Ga and Gb have the same configuration as the gas turbine unit G in the first embodiment, and include compressors 5a and 5b and gas turbines 7a and 7b. That is, in the present embodiment, the air cooled by the cooling devices 20a and 20b is supplied to the compressors 5a and 5b through the first air supply paths L10a and L10b, respectively. Further, the air supplied to the compressors 5a and 5b is mixed with the fuel gas and burned in a combustor (not shown). Then, the combustion gas generated in the combustor is sent to the gas turbines 7a and 7b to be used for rotational driving of the gas turbines 7a and 7b, and then as exhaust gas through the exhaust gas supply paths L13a and L13b, the exhaust heat recovery boiler unit 25a, It is sent to 25b.

Further, in the second embodiment, the second cooling medium supply path L4 connected to the refrigerator 10 is branched into the second cooling medium supply paths L4a and L4b on the downstream side of the refrigerator 10 and is also frozen. The cooling medium recovery path L5 connected to the machine 10 branches into the cooling medium recovery paths L5a and L5b on the upstream side of the refrigerator 10. Further, in the second embodiment, a seawater temperature sensor Ta that measures the temperature of seawater is provided in the refrigerant flow path La that passes through the inside of the absorber 13 and the condenser 17 of the refrigerator 10.

The vaporization medium supply paths L2a and L2b and the first cooling medium supply paths L3a and L3b are connected to the first cooling units 21a and 21b of the cooling devices 20a and 20b in the second embodiment, respectively. Further, the second cooling medium supply paths L4a and L4b and the cooling medium recovery paths L5a and L5b are connected to the second cooling units 22a and 22b, respectively.

Further, in the second embodiment, the first seawater supply passage L6 branches into the first seawater supply passages L6a and L6b on the downstream side of the pump P1, and the third cooling unit 23a of the cooling devices 20a and 20b, The first seawater supply channels L6a and L6b are connected to the 23b, and the seawater drainage channels L9a and L9b are connected to the 23b, and the first seawater supply channels L6a and L6b are connected to the third cooling units 23a and 23b. The supplied seawater is discarded into the sea through the seawater drainage channels L9a and L9b. In the cooling devices 20a and 20b, the cooling units 21a, 21b, 22a, 22b, 23a and 23b are the third cooling units 23a, 23b and the second from the upstream side of the first air supply passages L10a and L10b. The cooling units 22a and 22b and the first cooling units 21a and 21b are arranged in this order.

The exhaust heat recovery boiler units 25a and 25b in the second embodiment vaporize the water in the drums 26a and 26b by the exhaust gas sent from the gas turbines 7a and 7b through the exhaust gas supply paths L13a and L13b, respectively, to produce steam. Then, this steam is sent to the steam turbine 30 through the supply paths L14a and L14b.

In the second embodiment, the condensate cooling unit 32 of the steam turbine unit S is connected to the second seawater supply line L7 branched from the first seawater supply line L6b and is connected to the seawater discharge line L9c. (Ii) The seawater supplied through the seawater supply channel L7 is discarded into the sea through the seawater discharge channel L9c. Further, the steam produced by the exhaust heat recovery boiler units 25a and 25b is returned to water in the condenser 31 and supplied to the drums 26a and 26b through the water supply passages L15a and L15b.

The control device 40 is a device responsible for various controls related to the operation of the power generation system E1. The control device 40 can determine the number of operating gas turbine units Ga and Gb based on the power demand and the operating states of the cooling devices 20a and 20b. The operating states of the cooling devices 20a and 20b can be predetermined, or can be appropriately determined based on the power demand and the output characteristics of the gas turbine units Ga and Gb. Further, the output characteristics of the gas turbine units Ga and Gb are predetermined according to the atmospheric temperature, atmospheric pressure, humidity, seawater temperature and the like.

Hereinafter, an example of operation control of the power generation system performed by the control device 40 will be described with reference to FIG. In the following description, the operating state of the cooling devices 20a and 20b is such that the degree of cooling of air by the first cooling units 21a and 21b and the third cooling units 23a and 23b is constant, and then the second cooling is performed. It is changed by changing the degree of cooling of the air by the parts 22a and 22b. Further, FIG. 4 is a graph showing the output characteristics of the gas turbine unit determined in advance according to the atmospheric temperature. The one-point chain line X1 in the figure shows the first output characteristic when one gas turbine unit is operated while the cooling device is operated so that the air supplied to the combustor becomes 15 ° C. X2 shows the second output characteristic when two gas turbine units are operated in a state where the cooling device is operated so that the air supplied to the combustor becomes 15 ° C. Further, the two-point chain wire Y1 in the figure shows the third output characteristic when one gas turbine unit is operated while the cooling device is operated so that the air supplied to the combustor becomes 10 ° C. The two-point chain wire Y2 shows the fourth output characteristic when two gas turbine units are operated in a state where the cooling device is operated so that the air supplied to the combustor becomes 10 ° C.

First, the control device 40 can meet the power demand of 49.2 MW at an atmospheric temperature of 20 ° C. in a predetermined operating state of the cooling devices 20a and 20b (an operating state in which the air supplied to the combustor is 15 ° C.). The number of operating gas turbine units Ga and Gb is determined to be two, and the two gas turbine units Ga and Gb are operated (the state of the black circle (1) in FIG. 4).

Even if the atmospheric temperature rises from this state to 35 ° C., if the power demand is still in the state of 49.2 MW (the state of the black circle (2) in FIG. 4), this state is one point showing the first output characteristic. Since it is located between the chain wire X1 and the alternate long and short dash line X2 that exhibits the second output characteristic, it is possible to meet the power demand without changing the operating state of the cooling devices 20a and 20b, and the two gas turbine units Ga. , Keep Gb running.

Then, when the power demand increases from this state and the power demand becomes 82 MW or less (the state of the black circle (3) in FIG. 4), this state exceeds the alternate long and short dash line X2 indicating the second output characteristic. Not in a position. Therefore, since it is possible to meet the power demand without changing the operating state of the cooling devices 20a and 20b, the two gas turbine units Ga and Gb are maintained in the operating state.

On the other hand, if the power demand greatly exceeds 82 MW (the state of the white circle (3)'in FIG. 4), this state is the alternate long and short dash line X2 and the fourth output showing the second output characteristic. It is located far beyond the two-dot chain line Y2, which shows its characteristics. Therefore, even if the operating state of the cooling devices 20a and 20b is changed to the operating state in which the air supplied to the combustor is 10 ° C., the electric power demand cannot be met. Therefore, the third gas turbine unit (not shown) is used. Operate and respond.

After that, when the atmospheric temperature drops to 27 ° C. and the power demand drops to 42.6 MW (the state of the black circle (4) in FIG. 4), this state is one point indicating the first output characteristic. Although it exceeds the chain line X1, it is located on the alternate long and short dash line Y1 showing the third output characteristic. Therefore, by changing the operating state of the cooling devices 20a and 20b to an operating state in which the air supplied to the combustor is 10 ° C., the number of operating gas turbine units can be reduced to one to meet the power demand. .. Therefore, in the second embodiment, the temperature of the cold water supplied from the refrigerator 10 to the second cooling unit is lowered (that is, the degree of cooling of the air by the second cooling unit is increased), and the cooling devices 20a and 20b are used. The operating state is changed to an operating state in which the air supplied to the combustor is 10 ° C., and one of the two operating gas turbine units Ga and Gb is stopped.

As described above, in the moving body according to the second embodiment, the operating state of the cooling devices 20a and 20b and the number of operating gas turbine units Ga and Gb can be determined according to the power demand, which meets the power demand. The cooling device can be operated in an appropriate operating state, and the number of gas turbine units that meets the power demand can be operated without unnecessarily increasing the number of operating gas turbine units.

Further, in the control device 40, when the gas turbine units Ga and Gb are rapidly started or when the trips of the gas turbines 7a and 7b are stopped, the flow rate of LNG suddenly increases and the heat retained in the water supplied to the vaporizer 2 suddenly decreases. Even when the operation is performed properly, the buffer tank 38 provided in the cooling medium supply path L3 is provided with a sufficient amount of water, and control is performed so that water can be supplied quickly. As a result, it is possible to prevent the vaporizer 2 from being damaged by freezing due to insufficient heat.

[Another Embodiment]
[1] In each of the above embodiments, the cooling devices 20, 20a, 20b include first cooling units 21,21a, 21b, second cooling units 22, 22a, 22b, and third cooling units 23, 23a, 23b. Although the configuration is set, a configuration in which the cooling device includes at least any two of the above three cooling units may be adopted.

When a configuration including the first cooling units 21,21a, 21b and the second cooling units 22, 22a, 22b is adopted, the cold heat of the LNG is effectively utilized, and the energy efficiency of the entire power generation system is lowered. After solving the problem that the size of the refrigerator is inevitably increased, the air supplied to the combustor 6 is cooled by the first cooling units 21, 21a, 21b and the second cooling units 22, 22a, 22b. Therefore, it is possible to suppress a decrease in the output of the power generation systems E and E1 in the same manner as described above.
In this case, the air supplied to the combustor 6 is the second cooling unit 22, 22a, 22b, and the first cooling unit from the viewpoint of cooling the air without wasting the cold heat of the heat medium as much as possible. It is preferable to arrange these two cooling units 21,21a, 21b, 22, 22a, 22b so that they are distributed in the order of 21,21a, 21b.

Further, even when a configuration including the first cooling units 21 and 21a and 21b and the third cooling units 23, 23a and 23b is adopted, the cold heat of the LNG is effectively utilized and the energy efficiency of the entire power generation system is lowered. The air supplied to the combustor 6 is supplied to the first cooling units 21 and 21a and 21b and the third cooling units 23, 23a and 23b, while suppressing the problem of the chiller and the inevitable increase in size of the refrigerator. Since it can be cooled by the above, it is possible to suppress a decrease in the output of the power generation systems E and E1 in the same manner as described above.
In this case, these two cooling units 21 and 21a, so that the air supplied to the combustor 6 circulates in the order of the third cooling units 23, 23a and 23b and the first cooling units 21 and 21a and 21b. It is preferable to arrange 21b, 23, 23a, 23b, and in this way, the air can be cooled without wasting the cold heat of the heat medium as much as possible.

Further, when the configuration including the second cooling units 22, 22a, 22b and the third cooling units 23, 23a, 23b is adopted, there is a problem that the energy efficiency of the entire power generation system is lowered and the size of the refrigerator is increased. The air supplied to the combustor 6 can be cooled by the second cooling units 22, 22a, 22b and the third cooling units 23, 23a, 23b, while suppressing the occurrence of the problem that the above is unavoidable. Similarly, it is possible to suppress a decrease in the output of the power generation system E.
In this case, the two cooling units 22, 22a, so that the air supplied to the combustor 6 flows in the order of the third cooling units 23, 23a, 23b and the second cooling units 22, 22a, 22b. It is preferable to arrange 22b, 23, 23a, 23b, and in this way, the air can be cooled without wasting the cold heat of the heat medium as much as possible.

[2] In the above embodiment, the first cooling units 21,21a, 21b, the second cooling units 22, 22a, 22b and the third cooling units 23, 23a, 23b constituting the cooling devices 20, 20a, 20b burn. The configuration was such that the third cooling units 23, 23a, 23b, the second cooling units 22, 22a, 22b, and the first cooling units 21, 21, 21a, 21b were arranged in this order from the upstream side in the flow direction of the air flowing to the vessel 6. However, the arrangement of these cooling units is not limited to this, and can be appropriately set.

[3] In the above embodiment, the moving body is a ship including a fuel tank 1, a vaporizer 2, a gas turbine unit G, an exhaust heat recovery boiler unit 25, a steam turbine unit S, and generators 35 and 36, respectively. Although the case has been illustrated, the case is not limited to this, and at least a moving body equipped with a cooling device may be used, and in addition to the cooling device, the configuration required for gas turbine power generation (fuel tank, vaporizer, gas turbine unit and It may be a moving body equipped with a first generator).
In the case of a moving body equipped with a cooling device, for example, by moving the moving body to a facility equipped with a combined cycle power generation system without a cooling device, the cooling device provided by the moving body can be used in this power generation system. It becomes possible to cool the air supplied to the combustor, and it becomes possible to suppress a decrease in the output of the gas turbine unit.
Further, if a cooling device and a configuration required for gas turbine power generation are installed, it can be applied to a relatively small mobile body and put into practical use.
In addition to LNG carriers, moving objects include, but are not limited to, LPG carriers, ethylene ships, ammonia ships, liquefied hydrogen carriers, large tuna ships, refrigerated container ships, floating ships, etc. It also includes floating structures that have been built or modified and towed to the site of use and moored during the trial period or almost permanently, and other various land transportation facilities (trucks, dolly vehicles).

[4] In the first embodiment, a part of the seawater piping for supplying seawater to the third cooling unit 23 and the condensate cooling unit 32 and collecting seawater from these cooling units 23 and 32. (I. However, it is not limited to this. For example, a pipe for supplying seawater and collecting seawater to the third cooling unit 23 and a pipe for supplying seawater and collecting seawater to the condensate cooling unit 32 are provided, respectively, for third cooling. The condensate cooling unit 32 may use seawater supplied from a pipe different from the seawater used in the unit 23.

[5] In the first embodiment, a bypass flow path L8 connecting the first seawater supply path L6 and the second seawater supply path L7 is provided, and an adjusting device for adjusting the amount of seawater flowing through the bypass flow path L8. Although the configuration is provided with 24, the configuration is not limited to this, and a bypass flow path and an adjusting device may be provided as necessary.
Further, in the second embodiment, the mode of adjusting the amount of seawater flowing through the second seawater supply channel L7 is not adopted, but as in the first embodiment, an appropriate adjusting device is provided to provide a second. The amount of seawater flowing through the seawater supply channel L7 may be adjusted.

[6] In each of the above embodiments, water is used as the heat medium used in the vaporizer 2 and the first cooling units 21, 21, 21a, 21b, but an antifreeze solution such as ethylene glycol is used instead of water. Is also good. If an antifreeze solution is used, the temperature of the antifreeze solution is lower than that of water (for example, to 0 ° C.) by vaporizing LNG into fuel gas by heat exchange with the antifreeze solution in the vaporizer 2. By using the antifreeze liquid obtained from the LNG in the first cooling unit 21 and cooling the air supplied to the combustor 6, the air can be cooled to, for example, about 10 ° C.

[7] In each of the above embodiments, a so-called absorption chiller is adopted as the chiller 10, but the present invention is not limited to this, and an electric turbo chiller may be adopted.

[8] In each of the above embodiments, the cold heat of the refrigerant supplied from the outside is appropriately used for cooling the high-concentration absorbent liquid in the absorber 13 of the refrigerator 10 and cooling the water vapor in the condenser 17. However, it is not limited to this. For example, if the refrigerant flow path La is branched from the first seawater supply passages L6 and L6a, flows through the absorber 13 and the condenser 17, and is connected to the second seawater supply passage L7, seawater is provided. Since a part of the piping can be shared not only as the third cooling unit 23, 23a, 23b and the condensate cooling unit 32 but also as a flow path of seawater supplied to the absorber 13 and the condenser 17 of the refrigerator, the piping can be shared. The arrangement of can be simplified. When an electric turbo refrigerator is adopted as the refrigerator 10, the flow path of the cooling water used in the condenser of the electric turbo refrigerator is branched from the first seawater supply passages L6 and L6a. If it is provided so as to circulate in the condenser and connect to the second seawater supply path L7, a part of the seawater pipe can be shared and the arrangement of the pipe can be further simplified as described above. The pipe through which seawater flows is preferably made of stainless steel or titanium in consideration of the occurrence of rust and the like.

[9] In each of the above embodiments, seawater used as a cold heat source is pumped up from a depth of 30 m to 70 m as an example, but the present invention is not limited to this. For example, deep seawater can be used as a cold heat source.

[10] Although FIG. 1 does not show the configuration corresponding to the heat exchanger 37 and the buffer tank 38 in the second embodiment, also in the power generation system E mounted on the ship according to the first embodiment. It is preferable to provide a heat exchanger and a buffer tank in the first cooling medium supply path L3.

[11] In the second embodiment, a configuration is adopted in which the steam produced by the plurality of exhaust heat recovery boiler units 25a and 25b is sent to the common steam turbine 30, but the present invention is not limited to this, and a plurality of steams are used. The turbine unit S may be provided.

[12] In the second embodiment, as the output characteristics of the gas turbine units Ga and Gb for determining the operating state of the cooling devices 20a and 20b, those predetermined in accordance with the atmospheric temperature are used. Predetermined ones may be used according to the atmospheric pressure, humidity, and seawater temperature.

[13] In the second embodiment, the gas turbine units Ga and Gb are provided so as to be able to meet a predetermined power demand under a predetermined atmospheric temperature in a predetermined operating state of the cooling devices 20a and 20b. After determining the number of operating units, the gas turbine units Ga and Gb are operated, and then the operating state of the cooling devices 20a and 20b and the number of operating units of the gas turbine units Ga and Gb are appropriately adjusted according to the power demand and changes in the atmospheric temperature. The mode is changed, but the present invention is not limited to this.
First, the operating states of the cooling devices 20a and 20b are determined based on the power demand and the output characteristics of the gas turbine units Ga and Gb, and further, the gas turbine units Ga and Gb are determined based on the determined operating state and the power demand. The gas turbine units Ga and Gb may be operated after determining the number of operating units.
Further, when the change in the atmospheric temperature and the change in the electric power demand in one day are known in advance, the cooling devices 20a and 20b are operated in advance according to the state where the atmospheric temperature is the highest and the electric power demand is the highest. The state and the number of operating gas turbine units Ga and Gb may be determined.

[14] In the second embodiment, as a case of changing the operating state of the cooling devices 20a and 20b, a case of lowering the temperature of the cold water supplied from the refrigerator 10 to the second cooling unit (that is, the second cooling unit 22a). , 22b to increase the degree of cooling of air), but the present invention is not limited to this.
The operating state of the cooling devices 20a and 20b changes the degree of cooling of air by at least one of the first cooling units 21a and 21b, the second cooling units 22a and 22b and the third cooling unit 23a and 23b. Can be changed with.
For example, the temperature of seawater measured by the seawater temperature sensor Ta may be high, and it may be considered that the cooling of air by the third cooling units 23a and 23b is not effective. In this case, the regulating valves appropriately provided in the first seawater supply paths L6a and L6b are closed to change the operating state of the cooling devices 20a and 20b to the three cooling units 21a, 21b, 22a, 22b, 23a and 23b. In an operating state in which the air is cooled by the first cooling units 21a and 21b and the second cooling units 22a and 22b, and the air is not cooled by the third cooling units 23a and 23b (in other words, the first cooling). It is also possible to change to an operating state in which the cooling degree of air by the third cooling portions 23a and 23b is lowered without changing the cooling degree of air by the portions 21a and 21b and the second cooling portions 22a and 22b).

[15] In the second embodiment, the air produced by the first cooling units 21a and 21b, the second cooling units 22a and 22b, and the third cooling units 23a and 23b is based on the power demand and the output characteristics of the gas turbine unit. The operating state of the cooling devices 20a and 20b is determined by determining the degree of cooling, but the present invention is not limited to this.
The operating states of the cooling devices 20a and 20b are determined according to the atmospheric conditions (atmospheric temperature, atmospheric pressure, humidity, etc.), and the first cooling units 21a and 21b, the second cooling units 22a and 22b, and the third cooling unit 23a, The degree of cooling of the air by 23b may be determined.
For example, when the atmospheric temperature is low (about 20 to 30 ° C.), the operating state of the cooling devices 20a and 20b is determined to be a state in which the air having a low temperature is operated with a cooling capacity capable of cooling to a predetermined temperature. The degree of cooling of air by each of the cooling units 21a, 21b, 22a, 22b, 23a, and 23b may be determined so as to obtain such an operating state.

[16] In the second embodiment, the output characteristics of the gas turbine units Ga and Gb are taken into consideration when determining the operating state of the cooling devices 20a and 20b and the number of operating gas turbine units Ga and Gb. The operation is not limited to this, and the operation of the power generation system may be controlled in consideration of the efficiency characteristics of the gas turbine units Ga and Gb. An example of operation control of the power generation system in consideration of the efficiency characteristics of the gas turbine units Ga and Gb will be described with reference to FIG.
FIG. 5 is a graph showing the efficiency characteristics of the gas turbine unit, and the one-point chain line Z1 in the figure shows a load factor of 60 in a state where the cooling device is operated so that the air supplied to the combustor is 15 ° C. The efficiency characteristic per gas turbine unit (first efficiency characteristic) when it is% is shown, and the one-point chain wire Z2 shows the load factor in a state where the cooling device is operated so that the air supplied to the combustor becomes 15 ° C. The efficiency characteristic per gas turbine unit (second efficiency characteristic) when it is 100% is shown, and the two-point chain wire Z3 is in a state where the cooling device is operated so that the air supplied to the combustor becomes 10 ° C. The efficiency characteristics (third efficiency characteristics) per gas turbine unit when the load factor is 100% are shown.
At an air temperature of 20 ° C., the cooling device was operated at a load factor of 60% so that the air supplied to the combustor was 15 ° C., and two gas turbine units were operated (black circles (1) in FIG. 5). From the state), when the atmospheric temperature rises to 35 ° C. (the state of the black circle (2) in FIG. 5) without changing the number of operating gas turbine units and the degree of air cooling, one gas turbine unit per unit. Efficiency is reduced. From this state (the state of the black circle (2) in FIG. 5), the gas turbine output and the cooling device are operated at a load factor of 100% so that the air supplied to the combustor becomes 15 ° C. (in FIG. 5). By setting the black circle (3)), the efficiency per gas turbine unit can be improved. After that, when the air temperature dropped to 27 ° C., and at the same time, the power demand also dropped and the efficiency per gas turbine unit decreased (the state of the black circle (4) in FIG. 5). On condition that the power demand can be met, the cooling device is operated so that the air supplied to the combustor becomes 10 ° C. by a method such as lowering the temperature of the cold water supplied from the refrigerator, and the gas turbine unit is operated. The number of operating units is reduced to one (the state of the black circle (5) in FIG. 5). By doing so, the efficiency per gas turbine unit will be slightly reduced from the viewpoint of increasing the cooling capacity of the cooling device, but by reducing the number of operating gas turbine units to one, the gas turbine unit The efficiency per unit will eventually improve.
In this way, by controlling the operation of the power generation system in consideration of the efficiency characteristics of the gas turbine unit, the gas turbine unit can be operated efficiently.

[17] The configuration disclosed in the above embodiment (including another embodiment) can be applied in combination with the configuration disclosed in other embodiments as long as there is no contradiction, and the present specification. The embodiments disclosed in the document are examples, and the embodiments of the present invention are not limited thereto, and can be appropriately modified without departing from the object of the present invention.

The present invention can be used for a moving body provided with a cooling device capable of efficiently cooling the air supplied to the combustion means and suppressing a decrease in the output of the gas turbine unit.

1 Fuel tank 2 Vaporizer (vaporizer)
6 Combustor (combustion means)
7,7a, 7b Gas turbine 10 Refrigerator 20, 20a, 20b Cooling device 21, 21a, 21b First cooling unit 22, 22a, 22b Second cooling unit 23, 23a, 23b Third cooling unit 24 Adjusting device (adjusting means) )
25, 25a, 25b Exhaust heat recovery boiler unit 30 Steam turbine 31 Condenser 32 Condensation cooling unit 35 First generator (first power generation means)
36 Second generator (second power generation means)
L6, L6a, L6b 1st seawater supply channel (1st seawater channel)
L7 Second seawater supply channel (second seawater channel)
L8 Bypass flow path G, Ga, Gb Gas turbine unit S Steam turbine unit E, E1 Power generation system

Claims (18)

1. A gas turbine unit in which a mixture of fuel gas vaporized from liquid fuel and air is burned by a combustion means to generate a combustion gas, and the gas turbine is rotationally driven by the combustion gas generated by the combustion means, and the gas turbine. It is a moving body provided with a cooling device, which is used in a power generation system provided with a first power generation means for generating power by utilizing the rotational force of the above combustion means and is used for cooling the air supplied to the combustion means.
   The cooling device
   The first cooling unit that uses the heat medium used to vaporize the liquid fuel as a cold heat source, the second cooling unit that uses the heat medium from the refrigerator as a cold heat source, and seawater as a heat medium are used as cold heat sources. A moving body including at least two of the third cooling units.
2. The moving body according to claim 1, wherein the cooling device includes the first cooling unit and the second cooling unit.
3. The second aspect of the present invention, wherein the first and second cooling units are arranged so that the air supplied to the combustion means flows in the order of the second cooling unit and the first cooling unit. Mobile body.
4. The moving body according to claim 1, wherein the cooling device includes the first cooling unit and the third cooling unit.
5. The fourth aspect of the present invention, wherein the first and third cooling units are arranged in the cooling device so that the air supplied to the combustion means flows in the order of the third cooling unit and the first cooling unit. Mobile body.
6. The moving body according to claim 1, wherein the cooling device includes the second cooling unit and the third cooling unit.
7. The sixth aspect of claim 6 in which the second and third cooling units are arranged so that the air supplied to the combustion means flows in the order of the third cooling unit and the second cooling unit. Mobile body.
8. The moving body according to claim 1, wherein the cooling device includes the first cooling unit, the second cooling unit, and the third cooling unit.
9. In the cooling device, the first, second and third cooling units are arranged so that the air supplied to the combustion means flows in the order of the third cooling unit, the second cooling unit, and the first cooling unit. The moving body according to claim 8.
10. The fuel tank in which the liquid fuel is stored and
    A vaporization unit that vaporizes the liquid fuel by using the heat medium used in the first cooling unit as a heat source.
    With the gas turbine unit
    The mobile body according to any one of claims 1 to 9, further comprising the first power generation means.
11. An exhaust heat recovery boiler unit that vaporizes water with exhaust gas from the gas turbine unit,
    A steam turbine unit in which the steam turbine is rotationally driven by steam vaporized in the exhaust heat recovery boiler unit, and
    A second power generation means for generating power by utilizing the rotational force of the steam turbine is provided.
    The moving body according to claim 10, which is a ship.
12. The cooling device includes the third cooling unit.
    The steam turbine unit includes a condenser that recovers steam used for rotationally driving the steam turbine as condensate.
    The mobile body according to claim 11, further comprising a condensate cooling unit that cools the inside of the condenser by using the seawater used in the third cooling unit as a cooling heat source.
13. The first seawater flow path through which the seawater supplied to the third cooling unit flows, and
    A second seawater flow path through which the seawater supplied from the third cooling unit to the condensate cooling unit flows,
    A bypass flow path connecting the first seawater flow path and the second seawater flow path,
    The moving body according to claim 12, further comprising an adjusting means for adjusting the amount of seawater flowing through the bypass flow path.
14. The moving body according to any one of claims 1 to 13, which determines the number of operating gas turbine units based on the power demand and the operating state of the cooling device.
15. The moving body according to any one of claims 1 to 14, which determines the operating state of the cooling device based on the electric power demand and the output characteristics of the gas turbine unit.
16. The cooling device includes the first cooling unit and at least one of the second cooling unit and the third cooling unit.
    With the air supplied to the combustion means cooled by the first cooling unit, at least one of the second cooling unit and the third cooling unit is used based on the power demand and the output characteristics of the gas turbine unit. The moving body according to claim 15, wherein the operating state of the cooling device is determined by determining the degree of cooling of the air supplied to the combustion means.
17. The cooling device includes the first cooling unit, the second cooling unit, and the third cooling unit.
    With the air supplied to the combustion means cooled by the first cooling unit and the third cooling unit, the combustion means by the second cooling unit is based on the power demand and the output characteristics of the gas turbine unit. The moving body according to claim 15, wherein the operating state of the cooling device is determined by determining the degree of cooling of the air supplied to the cooling device.
18. The operating state of the cooling device is determined according to at least one of the air condition and the state of the cooling device, and the operating state of the first cooling unit, the second cooling unit, and the third cooling unit is determined. The moving body according to any one of claims 1 to 14, which determines the degree of cooling of the air supplied to the combustion means by at least one of them.

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