JP5174000B2 - Ship heat storage device and ship - Google Patents

Description

  The present invention relates to a marine heat storage device and a marine vessel, and more particularly to a marine heat storage device and a marine vessel that are used to supply hot water used in a ship's berth.

  Generally, a ship such as a large ferry includes a fresh water tank in which fresh water used in the ship is stored. In such a ship, in order to supply hot water used in the ship, fresh water is heated by a boiler or the like each time.

  However, when hot water is obtained by heating the boiler, much fuel is consumed in the boiler. On the other hand, from the viewpoint of reducing boiler fuel and improving the energy efficiency of a ship engine, it is required to use the waste heat of the engine. For this reason, it is desired to develop a ship that can supply hot water using the waste heat of the ship's engine, but the demand for hot water (heat demand) and the supply of engine waste heat (engine waste heat) May not necessarily coincide with time.

When the demand for hot water and the supply of ship engine waste heat do not coincide with each other in time, it is difficult to effectively use the waste heat of the ship engine.
For example, when a ship calls at a port to take passengers, the demand for hot water may increase rapidly. On the other hand, when calling at a port, it is desirable to stop the engine of the ship from the viewpoint of environmental conservation. Thus, conventionally, when calling at a port, the demand for hot water and the supply of engine waste heat may not coincide with each other in time.
Therefore, it is important to provide a heat storage device that stores the waste heat of the engine and extract heat from the heat storage device as necessary.

  For example, Patent Document 1 proposes an apparatus for storing waste heat of an internal combustion engine and an electric motor that assists the internal combustion engine. In Patent Document 1, fresh water that cools an internal combustion engine circulates through the internal combustion engine, and the waste heat of the internal combustion engine is stored in a hot water tank (heat storage tank). The cooling water stored in the heat storage tank is used for supplying hot water in the ship as needed.

JP 2003-81185 A

  However, the space in a ship is limited and it is difficult to ensure the space which arrange | positions a thermal storage tank. Although Patent Document 1 stores the cooling water used for cooling the electric motor and uses it for supplying hot water in the ship, there is no specific description about the arrangement of the heat storage tank, the hot water storage method, and the hot water utilization method.

  This invention is made | formed in view of the above-mentioned situation, and it aims at providing the thermal storage apparatus for ships which can utilize the waste heat of the engine of a ship with a compact structure, and a ship.

Marine heat storage device according to the present invention, a space for fresh water tank provided in the ship,
A low-temperature tank in which fresh water is stored;
A heat exchanger that heats the fresh water in the low-temperature tank by waste heat of the engine of the ship;
A high-temperature tank for storing the fresh water warmed by the waste heat of the engine in the heat exchanger;
A first pipe connecting the low temperature tank, the heat exchanger and the high temperature tank;
A first pump disposed in the first pipe and sending the fresh water from the low temperature tank to the high temperature tank via the heat exchanger ;
A second pipe connected to a discharge port provided on the bottom side of the high-temperature tank and connecting the high-temperature tank and the low-temperature tank ;
Wherein the cryostat and the hot bath space for pre Symbol Shimizu tank is disposed independently of one another,
The fresh water in the high-temperature tank is configured to be lower in temperature as it approaches the bottom surface of the high-temperature tank, and includes a second pump that returns fresh water having a lower temperature from the discharge port to the low-temperature tank. It is characterized by that.
Here, in this specification, "the low temperature tank and the high temperature tank are formed independently in the space for the fresh water tank" means that the low temperature tank and the high temperature tank are obtained by remodeling an existing ship's fresh water tank. In addition to making them independent of each other, it also includes installing a low temperature tank and a high temperature tank independently in a space for a fresh water tank of a new ship.

In the marine heat storage device, a high-temperature tank and a low-temperature tank are provided in the space for the fresh water tank, and the fresh water warmed by the waste heat of the engine is stored in the high-temperature tank while storing the fresh water in the low-temperature tank. There is no need to newly provide a space for installing the heat storage tank in the ship.
Therefore, the waste heat of the engine of the ship can be used with a compact configuration.

The low temperature tank and the high temperature tank may be formed by dividing the existing fresh water tank of the ship.
Thereby, since the high-temperature tank can be formed using the space of the existing fresh water tank, the waste heat of the engine of the ship can be used with a more compact configuration.

Also, disposed in front Symbol high temperature chamber, a temperature sensor for measuring the temperature of Shimizu in said high temperature chamber, disposed in the high temperature chamber, a level gauge for detecting the fresh water of the liquid surface of the the hot tub And a flow rate adjusting means for adjusting a flow rate of the fresh water flowing through the first pipe and the second pipe based on measurement results of the temperature sensor and the level meter.

For example, when the demand for hot water in the ship greatly falls below the supply amount, the hot water in the high-temperature tank (corresponding to fresh water warmed by engine waste heat) remains for a long time without being consumed, and the temperature gradually decreases. As described above, when the temperature of the hot water in the high-temperature tank is lowered, it may not be possible to supply the hot water into the ship. Therefore, it is important to maintain the temperature of the hot water in the high-temperature tank at a specified temperature or higher. In addition, it is important to maintain a predetermined amount of hot water in the high-temperature tank so that hot water in the high-temperature tank can be immediately supplied according to the demand for hot water in the ship.
Therefore, according to the present invention, based on the measurement result of the temperature sensor and level meter, regulates the flow rate of the fresh water flowing through the first pipe and the second pipe. This not only uses the waste heat of the ship's engine in a compact configuration, but also maintains the temperature and amount of hot water in the high-temperature tank above the specified values, so that the supply of hot water to the ship is smooth. Done.

  Alternatively, between the low temperature tank of the first pipe and the heat exchanger, a third pipe connecting the first pipe and the high temperature tank and the third pipe are arranged, and from the high temperature tank, the A third pump that returns the fresh water to the first pipe, a temperature sensor that is disposed in the high-temperature tank and that measures the temperature of the fresh water in the high-temperature tank, and is disposed in the high-temperature tank and the fresh water in the high-temperature tank And a flow rate adjusting means for adjusting the flow rate of the fresh water flowing through the first pipe and the third pipe based on the measurement results of the temperature sensor and the level gauge. Also good.

  In this way, the flow rate of fresh water flowing through the first pipe and the third pipe is adjusted based on the measurement results of the temperature sensor and the level meter. This not only uses the waste heat of the ship's engine in a compact configuration, but also maintains the temperature and amount of hot water in the high-temperature tank above the specified values, so that the supply of hot water to the ship is smooth. Done.

Moreover, it is preferable that the said heat exchanger heats the said fresh water by heat-exchanging the said fresh water of the said low-temperature tank with the cooling water of the said engine.
In general, engine cooling water, exhaust gas, and the like are used as the waste heat of a ship engine. Conventionally, the exhaust gas of a ship engine has been used for power generation or the like, whereas the engine cooling water is often discarded into the sea without being used as waste heat. However, as in the case of exhaust gas, effective use of waste heat is also demanded in the cooling water of ship engines. Therefore, the fresh water in the low temperature tank was exchanged with the engine cooling water to warm the fresh water.
Thereby, the waste heat of the engine of a ship can be utilized still more effectively.

The ship which concerns on this invention is equipped with the said engine and the said heat storage apparatus for ships, It is characterized by the above-mentioned.
In the above ship, a high-temperature tank and a low-temperature tank are provided in the space for the fresh water tank, and the fresh water is stored in the high-temperature tank while storing fresh water in the low-temperature tank. There is no need to newly provide a space for installing the heat storage tank.
Therefore, the waste heat of the engine of the ship can be used with a compact configuration.

Moreover, it is preferable to further include a boiler that heats the fresh water in the high-temperature tank and a hot water supply pipe that mixes the fresh water heated by the boiler with the fresh water in the low-temperature tank and supplies the fresh water to the ship.
When the demand for hot water in the ship greatly falls below the supply amount, the hot water in the high-temperature tank remains for a long time without being consumed, and the temperature gradually decreases. Then, the boiler which heats the fresh water in a high-temperature tank is provided.
Thereby, for example, even if the temperature of the hot water in the high-temperature tank is lowered, it can be cooked by the boiler, so that hot water having a specified temperature can be obtained. Therefore, it is possible to stably supply hot water used in the ship. In addition, since the boiler is used as an auxiliary, it is possible to suppress fuel consumption as compared with the conventional ship, and to consider the environment.

In the present invention, the high-temperature tank and the low-temperature tank are provided in the space for the fresh water tank, and the fresh water is stored in the low-temperature tank and the fresh water warmed by the waste heat of the engine is stored in the high-temperature tank. There is no need to newly provide a space for installing the heat storage tank.
Therefore, the waste heat of the engine of the ship can be used with a compact configuration.

It is a block diagram which shows an example of the ship provided with the thermal storage apparatus for ships which concerns on Embodiment 1. FIG. It is a block diagram which shows an example of a high temperature tank. It is a block diagram which shows an example of the ship provided with the thermal storage apparatus for ships which concerns on Embodiment 2. FIG. It is a flowchart which shows an example of the flow volume adjustment of the clear water which concerns on Embodiment 2. FIG. It is a block diagram which shows an example of the ship provided with the thermal storage apparatus for ships which concerns on Embodiment 3. FIG. It is a block diagram which shows an example of the ship provided with the thermal storage apparatus for ships which concerns on Embodiment 4. It is a block diagram which shows an example of the ship provided with the thermal storage apparatus for ships which concerns on Embodiment 5. FIG.

  Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention unless otherwise specified, but are merely illustrative examples. Not too much.

[Embodiment 1]
FIG. 1 is a configuration diagram illustrating an example of a ship provided with a marine heat storage device according to the first embodiment of the present invention.

  As shown in FIG. 1, the marine vessel 1 is mainly composed of a marine heat storage device 10, an engine 20, a boiler 16, and a hot water supply pipe 18.

  The marine heat storage device 10 is a device that stores waste heat of the engine 20, and includes, for example, a low temperature tank 4, a heat exchanger 6, a high temperature tank 8, a first pipe 12, and a first pump 14. Prepare.

  The low temperature tank 4 and the high temperature tank 8 are formed independently of each other in the space for the fresh water tank 2. The low temperature tank 4 and the high temperature tank 8 may be formed by modifying a fresh water tank of an existing ship, or may be formed in a space of a fresh water tank of a new ship.

Waste heat of the engine 20 is stored in fresh water used in the ship 1 and stored in the high-temperature tank 8.
A high-temperature tank and a low-temperature tank are installed in the space for the fresh water tank, and fresh water is stored in the low-temperature tank and fresh water warmed by the waste heat of the engine is stored in the high-temperature tank. It is not necessary to newly provide a space for
Therefore, the waste heat of the engine of the ship can be used with a compact configuration.

As described above, the high-temperature tank 8 stores the fresh water warmed by the waste heat of the engine 20 in the heat exchanger 6 as hot water and stores the waste heat of the engine, and corresponds to a heat storage tank (hot water tank). To do. Moreover, although not shown in figure, the high temperature tank 8 is formed with the double structure of a tank and a heat insulating material, and suppresses the fall of the fresh water temperature stored in the high temperature tank 8. FIG.
Moreover, as shown in FIG. 2, it is preferable to install the heat insulation lid | cover 31 with high heat insulation in the gas-liquid interface in the high temperature tank 8. As shown in FIG. Thereby, the heat retention in the high temperature tank 8 can be improved. The heat insulating lid 31 can be moved according to the water level of the high-temperature tank 8.

  Normal temperature fresh water is stored in the low temperature tank 4, and the temperature of the fresh water is lower than that in the high temperature tank 8. The fresh water in the low temperature tank 4 is sent to the heat exchanger 6 through the first pipe 12.

  In the heat exchanger 6, the fresh water sent from the low temperature tank 4 is warmed by exchanging heat between the fresh water in the low temperature tank 4 and the waste heat of the engine 20 of the ship 1. The waste heat of the engine 20 of the ship 1 used here is not particularly limited, and may be exhaust gas of the engine or cooling water of the engine. In particular, engine cooling water is generally discarded to the sea without using waste heat as compared with engine exhaust gas, but by exchanging heat with fresh water in the low-temperature tank 4 as described above, It can be used effectively to warm fresh water.

The first pipe 12 connects the low temperature tank 4, the heat exchanger 6 and the high temperature tank 8 described above. It is preferable that the flow rate of the first pipe 12 is adjusted by an arbitrary method. Specifically, for example, a variable flow type first pump 14 may be used, or a flow rate adjusting valve 15 may be provided.
The first pump 14 sends fresh water from the low temperature tank 4 to the high temperature tank 8 through the heat exchanger 6.

The boiler 16 may heat fresh water (hot water) in the high-temperature tank 8.
Thereby, even if the demand for hot water in the ship greatly falls below the supply amount, the hot water in the high-temperature tank remains for a long time without being consumed, and the temperature gradually decreases, it can be cooked by the boiler. On the other hand, for example, even if the demand for hot water in the ship greatly exceeds the supply amount and the hot water in the high-temperature tank 8 is insufficient, and hot water cannot be supplied to the ship, the boiler 16 temporarily supplies fresh water in the high-temperature tank 8. By warming (warm water), the shortage of warm water can be compensated.
Therefore, it becomes possible to supply the specified temperature and the specified amount of hot water into the ship. Moreover, since the boiler 16 is used supplementarily, it can suppress fuel consumption compared with the conventional ship, and can also consider environmentality.
The specified temperature of the hot water is not particularly limited, but it is set to a higher temperature (for example, about 80 ° C.) than that actually used in consideration of supplying it to the cabin in the ship far from the marine thermal storage device 10. Good.

  The hot water supply pipe 18 mixes the fresh water from the high temperature tank 8 heated by the boiler 16 and the fresh water in the low temperature tank 4 and supplies them to the ship. The flow rate of fresh water from the high temperature tank 8 and fresh water from the low temperature tank 4 may be adjusted by a valve 19 and a valve 17, respectively.

  Since the ship 1 includes the above-described heat storage device 10 for ships, for example, hot water can be stored in the high-temperature tank 8 before calling at a port. Therefore, even if it is a case where a port is called in order to board a passenger and the demand for hot water increases rapidly, hot water can be supplied into the ship without using the boiler as much as possible. This is particularly effective when calling at the port because it is desired to limit the use of the boiler or to stop the engine of the ship from the viewpoint of environmental conservation.

[Embodiment 2]
Next, the marine heat storage device according to the second embodiment will be described.
FIG. 3: is a block diagram which shows an example of the ship provided with the thermal storage apparatus for ships which concerns on Embodiment 2 of this invention. FIG. 4 is a flowchart showing an example of flow rate adjustment of fresh water according to the second embodiment.

The marine heat storage device 10 according to the second embodiment is the marine heat storage device described with reference to FIG. 1 except that the temperature of fresh water (hot water) in the high-temperature tank 8 and the amount of fresh water are maintained at a specified value or more. 10 is the same configuration. Therefore, the detailed description of the same configuration as that of the first embodiment is omitted.
As shown in FIG. 3, the marine heat storage device 10 further includes a second pipe 22, a second pump 24, a temperature sensor 26, and a level meter 28 in addition to the configuration described in FIG. 1.

The second pipe 22 connects the low temperature tank 4 and the high temperature tank 8. One end of the second pipe 22, that is connected to the discharge port 29 provided on the bottom surface side of the high temperature chamber 8. The other end of the second pipe 22 is connected to the low temperature tank 4 and may be connected to the upper surface side of the low temperature tank 4 as shown in FIG. May be.
The flow rate of the second pipe 22 is preferably adjusted by an arbitrary method. Specifically, for example, a variable flow rate second pump 24 may be used, or a flow rate adjusting valve 25 may be provided.

  It is preferable not to stir the fresh water in the high-temperature tank 8 so that the temperature becomes lower as it approaches the bottom surface of the high-temperature tank 8. Thus, the second pump 24 can return the fresh water having a lower temperature among the fresh water in the high-temperature tank 8 from the discharge port 29 to the low-temperature tank 4.

The temperature sensor 26 measures the temperature of fresh water in the high-temperature tank 8, and can be installed at any place in the high-temperature tank 8. The number of temperature sensors is not particularly limited as long as it is at least one. For example, if there is a temperature distribution in the fresh water temperature in the high-temperature tank 8 as described above, temperature sensors 26a and 26b may be provided above and below the high-temperature tank 8 as shown in FIG. Here, the fresh water temperatures measured by the temperature sensors 26a and 26b are T ₁ and T ₂ , respectively.
The level meter 28 is disposed in the high-temperature tank 8 and detects the level of fresh water in the high-temperature tank 8.

  In order to supply the fresh water (hot water) in the high-temperature tank 8 to the ship according to the demand for hot water in the ship, the temperature of the fresh water in the high-temperature tank 8 is maintained at a specified temperature or more, and the fresh water in the high-temperature tank 8 It is important to maintain the amount (warm water amount) so that the specified amount remains. Therefore, it is better to adjust the flow rate of fresh water flowing through the first pipe 12 and the second pipe 22 based on the measurement results of the temperature sensor 26 and the level meter 28.

  For example, as shown in FIG. 4, first, the start of the engine 20 is confirmed (step 1). If it is confirmed that the engine 20 is activated, the process proceeds to step 3. On the other hand, if it is determined that the engine 20 has not been started (NO determination in step 1), the first pipe 12 is closed and the second pipe 22 is closed (step 2).

When the start of the engine 20 (step 1) is confirmed in step 1, it is determined by the level meter 28 whether or not there is a specified amount of fresh water stored in the high temperature tank 8 (step 3). When fresh water is stored in the hot tank 8 is determined to be the specified amount (YES judgment in step 3), Shimizu temperature T ₂ of the bottom side of the high temperature chamber 8 by the temperature sensor 26b is measured (step 5), step Proceed to 6.
On the other hand, if it is determined that the amount of fresh water stored in the high-temperature tank 8 is not a specified amount (NO determination in step 3), the first pipe 12 is opened using the variable flow rate first pump 14 or the valve 15 and the first pipe 12 is opened. The flow rate of the one pipe 12 is made larger than the current flow rate, and the second pipe 22 is closed using the variable flow rate second pump 24 or the valve 25 to make the flow rate of the second pipe 22 smaller than the current flow rate (step). 4). At this time, the second pipe 22 is preferably fully closed because there is no specified amount of fresh water stored in the high-temperature tank 8.

In step 6, the fresh water temperature T ₂ on the bottom surface side of the high temperature tank 8 is compared with the specified temperature T _th of fresh water in the high temperature tank 8.
If fresh water temperature T ₂ of the bottom side of the high temperature chamber 8 is equal to or less than the specified temperature T _th above (YES determination at step 6), the first pipe 12 open with a variable flow-type first pump 14 or the valve 15 of the Then, the flow rate of the first pipe 12 is made larger than the current flow rate, and the second pipe 22 is opened using the variable flow rate second pump 24 or the valve 25 to make the flow rate of the second pipe 22 larger than the current flow rate. (Step 7).

On the other hand, based on the measurement result of the temperature sensor 26b, greater than the specified temperature _{T th} Shimizu temperature _{T 2} of the bottom side of the fresh water of the hot tank 8 _{(T 2> T th)} when (NO judgment in step 6), The first pipe 12 is closed using the variable flow type first pump 14 or valve 15 to make the flow rate of the first pipe 12 smaller than the current flow rate, and the variable flow type second pump 24 or valve 25 is used. The second pipe 22 is closed to make the flow rate of the second pipe 22 smaller than the current flow rate (step 8). At this time, the temperature and amount of fresh water in the high-temperature tank 8 are in a state satisfying specified values, and therefore it is preferable to fully close the first pipe 12 and the second pipe 22.

Here, as an object to be compared with the specified temperature T _th, an example has been described using fresh water temperature T ₂ of the bottom side of the high temperature chamber 8, which is measured by the temperature sensor 26b, is not particularly limited, compared the temperature sensor It may be the fresh water temperature T ₁ on the upper surface side of the high-temperature tank 8 measured at 26a, or may be the average value of the fresh water temperature T ₁ and the fresh water temperature T ₂ described above.

Thereby, for example, even when the demand for hot water in the ship greatly falls below the supply amount, and the fresh water (hot water) in the high temperature tank 8 remains for a long time without being consumed, and the fresh water temperature gradually decreases, the high temperature tank 8 changes to the low temperature tank. 4 can return the fresh water.
Therefore, not only can the waste heat of the ship's engine be used in a compact configuration, but the temperature and amount of hot water in the high-temperature tank can be maintained at or above the specified values, so that hot water can be supplied smoothly into the ship. Is called.

[Embodiment 3]
Next, the marine heat storage device according to the third embodiment will be described.
FIG. 5: is a block diagram which shows an example of the ship provided with the thermal storage apparatus for ships which concerns on Embodiment 3 of this invention.

  The marine heat storage device 10 according to the third embodiment has the same configuration as the marine heat storage device 10 described in the second embodiment except that a third pipe 32 is provided instead of the second pipe 22. Therefore, the detailed description of the same configuration as that of the second embodiment is omitted.

The third pipe 32 connects the first pipe 12 and the high temperature tank 8 between the low temperature tank of the first pipe 12 and the heat exchanger 6. One end of the third pipe 32 is preferably connected to a discharge port 29 provided on the bottom surface side of the high-temperature tank 8.
The flow rate of the third pipe 32 is preferably adjusted by an arbitrary method. Specifically, for example, a variable flow type third pump 34 may be used, or a flow rate adjusting valve 35 may be provided.

According to the present embodiment, as in the second embodiment, for example, the demand for hot water in the ship greatly falls below the supply amount, and the fresh water (hot water) in the high-temperature tank 8 remains for a long time without being consumed, and the fresh water temperature gradually increases. Even if it falls, the fresh water of the high-temperature tank 8 can be reheated with the heat exchanger 6, and the fresh water temperature of the high-temperature tank 8 can be kept above a specified temperature.
Specifically, when the fresh water temperature in the high-temperature tank 8 is equal to or lower than the specified temperature, the first pipe 12 is closed, and the third pipe 32 is opened using the third pump 34 or the valve 35 having a variable flow rate, so that the third pipe 32 is opened. By making the flow rate of the pipe 32 larger than the current flow rate, the fresh water in the high-temperature tank 8 is reheated by the heat exchanger 6.
Therefore, not only can the waste heat of the ship's engine be used in a compact configuration, but the temperature and amount of hot water in the high-temperature tank can be maintained at or above the specified values, so that hot water can be supplied smoothly into the ship. Is called.

[Embodiment 4]
Next, the marine heat storage device according to the fourth embodiment will be described.
FIG. 6: is a block diagram which shows an example of the ship provided with the thermal storage apparatus for ships which concerns on Embodiment 4 of this invention.

The marine heat storage device 10 has the same configuration as the marine heat storage device 10 described in the first embodiment except that the marine heat storage device 10 includes an auxiliary pipe 30 that supplies fresh water in the low-temperature tank 4 to the boiler 16. Therefore, the detailed description of the same configuration as that of the first embodiment is omitted.
As shown in FIG. 6, the marine heat storage device 10 further includes an auxiliary pipe 30, an auxiliary pump 33, a temperature sensor 26, and a level meter 28 in addition to the configuration described in FIG. 1.

In this way, by providing the auxiliary pipe 30 that can supply the fresh water in the low temperature tank 4 to the boiler 16, even if the amount of fresh water in the high temperature tank 8 is insufficient, the boiler 16 can recharge.
Specifically, for example, the auxiliary pipe 30 is opened using the variable flow type auxiliary pump 33 so that the flow rate of the auxiliary pipe 30 is larger than the current flow rate, and the fresh water in the low temperature tank 4 is replenished by the boiler 16. .
This makes it possible to stably supply hot water used on the ship.

[Embodiment 5]
Next, a marine heat storage device according to the fifth embodiment will be described.
FIG. 7: is a block diagram which shows an example of the ship provided with the thermal storage apparatus for ships which concerns on Embodiment 5 of this invention.

  As shown in FIG. 7, the marine vessel 1 mainly includes a marine heat storage device 10, an engine 20, a boiler 16, a hot water supply pipe 18, an auxiliary pipe 30, and an auxiliary pump 33.

The marine heat storage device 10 is a device that stores waste heat of the engine 20, and includes, for example, a low temperature tank 4, a heat exchanger 6, a high temperature tank 8, a first pipe 12, a first pump 14, and the like. A third pipe 32, a third pump 34, a temperature sensor 26, and a level meter 28 are provided.
In addition, since these structures are the same as the structure of above-mentioned Embodiment 1-4, the detailed description is abbreviate | omitted.

The engine 20 has an engine start / stop detector 36 that detects its own operating state (stop, start).
In the present embodiment, each unit is controlled by a controller (not shown) so that hot water supplied to the ship is obtained at an appropriate temperature and in an appropriate amount.

Specifically, as shown in Table 1, when the fresh water amount in the high-temperature tank 8 is an appropriate amount and the fresh water temperature in the high-temperature tank 8 is lower than the specified temperature in the startup state of the engine 20, the first pipe 12 is used. Is closed to make the flow rate of the first pipe 12 smaller than the current flow rate, and the third pipe 32 is opened to make the flow rate of the third pipe 32 larger than the current flow rate.
When the amount of fresh water in the high-temperature tank 8 is insufficient regardless of the fresh water temperature in the high-temperature tank 8, the first pipe 12 is opened and the flow rate of the first pipe 12 is made larger than the current flow rate. The pipe 32 is closed to make the flow rate of the third pipe 32 smaller than the current flow rate. The third pipe 32 is preferably fully closed.

On the other hand, when the engine 20 is stopped, as shown in Table 1, when the amount of fresh water in the high temperature tank 8 is an appropriate amount and the fresh water temperature in the high temperature tank 8 is lower than the specified temperature, the boiler 16 is started. The fresh water in the high-temperature tank 8 is heated.
In addition, when the amount of fresh water in the high-temperature tank is insufficient regardless of the fresh water temperature in the high-temperature tank 8, the boiler 16 is started and the auxiliary pipe 30 is opened to make the flow rate of the auxiliary pipe 30 larger than the current flow rate. . Thus, the fresh water in the low temperature tank 4 is heated with the boiler 16, and the shortage of warm water is compensated.

As mentioned above, although it explained in detail in the example of the present invention, the present invention is not limited to this, and various improvements and modifications may be made without departing from the gist of the present invention.
For example, it goes without saying that the above-described first to fifth embodiments may be appropriately combined.

DESCRIPTION OF SYMBOLS 1 Ship 2 Fresh water tank 4 Low temperature tank 6 Heat exchanger 8 High temperature tank 10 Marine heat storage device 12 1st piping 14 1st pump 15 Valve 16 Boiler 18 Hot water supply pipe 20 Engine 22 2nd piping 24 2nd pump 25 Valve 26 Temperature sensor 28 Level meter 29 Discharge port 30 Auxiliary piping 31 Heat insulation lid 32 Third piping 33 Auxiliary pump 34 Third pump 35 Valve

Claims (7)

And space for the fresh water tank provided in the ship,
A low-temperature tank in which fresh water is stored;
A heat exchanger that heats the fresh water in the low-temperature tank by waste heat of the engine of the ship;
A high-temperature tank for storing the fresh water warmed by the waste heat of the engine in the heat exchanger;
A first pipe connecting the low temperature tank, the heat exchanger and the high temperature tank;
A first pump disposed in the first pipe and sending the fresh water from the low temperature tank to the high temperature tank via the heat exchanger ;
A second pipe connected to a discharge port provided on the bottom side of the high-temperature tank and connecting the high-temperature tank and the low-temperature tank ;
Wherein the cryostat and the hot bath space for pre Symbol Shimizu tank is disposed independently of one another,
The fresh water in the high-temperature tank is configured to be lower in temperature as it approaches the bottom surface of the high-temperature tank, and includes a second pump that returns fresh water having a lower temperature from the discharge port to the low-temperature tank. A marine heat storage device.   The said low temperature tank and the said high temperature tank are divided | segmented and formed the said fresh water tank of the said ship, The thermal storage apparatus for ships of Claim 1 characterized by the above-mentioned. Placed before Symbol high temperature chamber, a temperature sensor for measuring the temperature of Shimizu in said high temperature chamber,
A level meter that is disposed in the high-temperature tank and detects the level of the fresh water in the high-temperature tank;
The flow rate adjusting means for adjusting the flow rate of the fresh water flowing through the first pipe and the second pipe based on measurement results of the temperature sensor and the level meter is further provided. The marine heat storage device described. A third pipe connecting the first pipe and the high-temperature tank between the low-temperature tank of the first pipe and the heat exchanger;
A third pump disposed in the third pipe and returning the fresh water from the high temperature tank to the first pipe;
A temperature sensor disposed in the high-temperature bath and measuring the temperature of the fresh water in the high-temperature bath;
A level meter that is disposed in the high-temperature tank and detects the level of the fresh water in the high-temperature tank;
The flow rate adjusting means for adjusting the flow rate of the fresh water flowing through the first pipe and the third pipe based on measurement results of the temperature sensor and the level meter is further provided. The marine heat storage device described.   The said heat exchanger heat-exchanges the said fresh water of the said low temperature tank with the cooling water of the said engine, and warms the said fresh water, The thermal storage apparatus for ships as described in any one of Claim 1 thru | or 4 characterized by the above-mentioned. . The engine;
A marine vessel comprising the marine heat storage device according to claim 1. A boiler for heating the fresh water in the high-temperature tank;
The ship according to claim 6, further comprising a hot water supply pipe that mixes the fresh water heated by the boiler with the fresh water in the low-temperature tank and supplies the fresh water to the ship.

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