JP6103433B2 - Marine thermoelectric power generation system and ship - Google Patents

Description

  The present invention relates to a ship thermoelectric power generation system that converts heat of exhaust gas discharged from an internal combustion engine of a ship into electricity using a thermoelectric power generation element that utilizes the Seebeck effect.

  Patent Document 1 discloses a power generation device for a water-cooled engine mounted on a ship. In Patent Document 1, the power generation device is configured by a thermoelectric generator, and the water-cooled engine partitions the exhaust passage and the coolant passage adjacent to each other by a wall, and includes the thermoelectric generator in the wall. Yes. In this thermoelectric generator, the high temperature portion is brought close to the exhaust passage, and the low temperature portion is brought close to the cooling water passage. Therefore, the thermoelectric generator generates an electromotive force according to the temperature difference between the high temperature portion and the low temperature portion, and generates power using the temperature difference.

  Patent Document 2 discloses a configuration in which a Peltier element module is provided in a water-cooled heat exchanger for cooling an internal combustion engine such as a ship to convert waste heat into electric energy. In Patent Document 2, a Peltier element module is sandwiched between a heat medium liquid radiation pipe and a heat radiation fin, so that one of the Peltier element modules is overheated with a high-temperature heat medium liquid and the other is cooled with air or seawater to generate power. To do.

  Patent Document 3 discloses an apparatus in which a thermoelectric generator is attached to an exhaust pipe through which exhaust from an engine flows and a cooling water circulation path through which cooling water circulates by a cooling water pump. In Patent Document 3, when a plurality of thermoelectric power generation elements are attached to the exhaust pipe and the cooling water pipe, the flow of the cooling water in the cooling water pipe is designed so as to face the direction of the exhaust gas flowing through the exhaust pipe. Since the temperature difference between the exhaust pipe and the cooling water pipe in the thermoelectric power generation element on the side increases, the power generation difference in each thermoelectric power generation element is reduced, and the overall power generation capacity is improved.

  Patent Document 4 discloses an apparatus that performs thermoelectric power generation by a thermoelectric power generation unit by supplying cooling water from the engine to the thermoelectric power generation unit. In Patent Document 4, when the engine is at a high temperature, overheating of the engine is suppressed by not circulating the cooling water from the engine through the thermoelectric cooling water passage.

  Patent Document 5 discloses a thermoelectric generator that generates power with a thermoelectric element using a high temperature side heat source as exhaust gas from an engine and a low temperature side heat source as cooling water for an engine cooled by a radiator. In Patent Document 5, variable means for changing the supply condition of at least one of exhaust gas and cooling water to the thermoelectric element is provided so that a temperature difference generated in the thermoelectric element becomes large.

JP 2010-242700 A JP 2007-198276 A JP 2005-299417 A JP 2005-307886 A Japanese Patent Application Laid-Open No. 2004-360681

As disclosed in Patent Documents 1 to 5, thermoelectric power generation apparatuses that generate power using exhaust gas discharged from an internal combustion engine and cooling water that cools the internal combustion engine are known.
However, the thermoelectric conversion elements used in these thermoelectric power generation devices are limited in terms of the maximum operating temperature in terms of specifications due to the bonding material conditions, material oxidation, and the like.
For example, in a thermoelectric conversion element using a bismuth / tellurium system (Bi-Te system), the maximum use temperature is about 230 ° C., and in a thermoelectric conversion element using a lead / tellurium system (Pb—Te system), the maximum use temperature is It is about 530 degreeC.
Accordingly, when exhaust heat recovery is performed using exhaust gas of an internal combustion engine exceeding 600 ° C., the surface temperature of the high-temperature portion of the thermoelectric conversion element is set to an appropriate temperature in order to maintain stable long-term power generation operation. It is necessary to adjust to. Further, it is desired to maintain the surface temperature of the high temperature part at an appropriate temperature equal to or lower than the maximum use temperature in accordance with the maximum use temperature of the thermoelectric conversion element to be used.
In particular, when cooling water for cooling the internal combustion engine is used, the supply of cooling water to the thermoelectric conversion element is stopped by stopping the operation of the internal combustion engine, and as a result, the surface temperature of the thermoelectric conversion element exceeds the maximum operating temperature. May end up.

  Therefore, the present invention provides a marine thermoelectric power generation system and a ship that can stably cool the thermoelectric power generation means by exposing the thermoelectric power generation means to water around the hull even when water intake is stopped. Objective.

  In the marine thermoelectric power generation system corresponding to the first aspect of the present invention, an exhaust gas path through which exhaust gas discharged from the internal combustion engine of the ship passes, a cooling water path through which cooling water for cooling the internal combustion engine passes, and a high temperature And a thermoelectric power generation means for generating power by receiving heat from the exhaust gas path at the section and dissipating heat to the intake section of the cooling water path or the hull below the draft at the low temperature section. According to the first aspect of the present invention, even when water intake is stopped, the thermoelectric power generation means is exposed to the water around the hull, so that the thermoelectric power generation means can be cooled stably.

  According to a second aspect of the present invention, there is provided a marine thermoelectric power generation system according to the first aspect, wherein the mixer means for mixing the cooling water with the exhaust gas in the exhaust gas passage, and the cooling water supplied by the mixer means is adjusted to a high temperature. And a temperature control means for controlling the temperature in the section. According to the second aspect of the present invention, the temperature control means for controlling the temperature in the high temperature part by adjusting the cooling water supplied by the mixer means is provided, so that the surface temperature of the high temperature part of the thermoelectric power generation means is appropriately set. The temperature can be adjusted to a stable temperature and stable long-term power generation operation can be maintained.

  According to a third aspect of the present invention, there is provided the marine thermoelectric power generation system according to the second aspect, wherein the temperature control means is controlled based on a use upper limit temperature of the thermoelectric power generation means. According to this invention of Claim 3, according to the specification of the thermoelectric power generation means to be used, the surface temperature of the high temperature part of a thermoelectric power generation means can be adjusted to suitable temperature.

  According to a fourth aspect of the present invention, there is provided the marine thermoelectric power generation system according to the third aspect, further comprising temperature detecting means for detecting a temperature in the high temperature part, wherein the temperature control means includes a detected value of the temperature detecting means, a use upper limit temperature, Based on the above, the mixer means is controlled. According to the present invention as set forth in claim 4, a stable long-term power generation operation can be maintained without exposing the thermoelectric power generation means to a high temperature exceeding the upper limit temperature for use.

  According to a fifth aspect of the present invention, there is provided the marine thermoelectric power generation system according to the third or fourth aspect, wherein the temperature control means adjusts the temperature difference between the high temperature part and the low temperature part at a temperature not more than the upper limit temperature of use. And controlling the power generation output of the thermoelectric power generation means. According to the fifth aspect of the present invention, the power generation amount can be improved.

  A sixth aspect of the present invention is the marine thermoelectric power generation system according to any one of the second to fifth aspects, wherein the mixer means has an opening that opens to an exhaust gas path upstream of the thermoelectric power generation means. The cooling water is injected from the opening in the flow direction of the exhaust gas. According to the sixth aspect of the present invention, the temperature of the exhaust gas can be quickly reduced, and an adverse effect on the internal combustion engine can be prevented by not inhibiting the flow of the exhaust gas.

  A seventh aspect of the present invention is the marine thermoelectric power generation system according to the sixth aspect, wherein the opening has a porous structure and the cooling water is jetted in a shower shape. According to the seventh aspect of the present invention, the temperature of the exhaust gas can be further rapidly reduced by spraying in a shower shape.

  The present invention according to claim 8 is the marine thermoelectric power generation system according to any one of claims 1 to 7, wherein the cooling water is continuously taken in by the water intake unit at least during operation of the internal combustion engine, The engine is continuously discharged after being cooled. According to this invention of Claim 8, compared with the case where cooling water is circulated, a cooling effect can be acquired stably.

  A ninth aspect of the present invention is the marine thermoelectric power generation system according to the sixth or seventh aspect, wherein a part of the taken cooling water is used as the cooling water injected from the opening. . According to the ninth aspect of the present invention, it is possible to supply the cooling water to the mixer means separately from the cooling water flowing through the cooling water path, and to prevent the cooling effect of the internal combustion engine from being impaired.

  According to a tenth aspect of the present invention, there is provided the marine thermoelectric power generation system according to any one of the second to ninth aspects, wherein the temperature control means adjusts a flow rate adjusting valve provided in the cooling water path to adjust the cooling water. It is characterized by controlling the flow rate. According to the tenth aspect of the present invention, since the temperature decrease amount of the exhaust gas can be adjusted, the surface temperature of the high temperature portion of the thermoelectric power generation means can be adjusted to an appropriate temperature without reducing the power generation amount.

  The present invention according to claim 11 is the marine thermoelectric power generation system according to any one of claims 1 to 10, wherein the thermoelectric power generation means includes a plurality of thermoelectric power generation elements arranged around the exhaust gas path, The thermoelectric power generation element is configured to be connected in a heat transfer manner to a water hull or a hull below a draft. According to the eleventh aspect of the present invention, it is possible to efficiently receive heat from the exhaust gas path and dissipate heat to the cooling water path.

  The present invention according to claim 12 is the marine thermoelectric power generation system according to claim 11, wherein the inner surface of the exhaust gas path in which the thermoelectric power generation element is arranged and / or the intake section or the draft in which the thermoelectric power generation element is arranged are below. A heat transfer fin is provided on the hull. According to the present invention described in claim 12, the amount of heat received from the exhaust gas path can be increased, and the amount of heat released from the intake section or the hull below the draft can be increased.

  According to a thirteenth aspect of the present invention, in the marine thermoelectric power generation system according to the eleventh or twelfth aspect, a seal material having compressibility and heat resistance is provided around the thermoelectric power generation element, and the seal material is an exhaust gas. It is characterized by being sandwiched between the route and the intake section or the hull below the draft. According to this invention of Claim 13, the dew condensation and salt damage of a thermoelectric power generation element can be prevented with a sealing material, and durability performance can be improved. Moreover, since it becomes easy to make the surface pressure concerning each thermoelectric power generation element uniform, electric power generation efficiency can be improved.

  According to a fourteenth aspect of the present invention, in the marine thermoelectric power generation system according to any one of the second to thirteenth aspects, the temperature control means increases the supply amount of the cooling water before the operation of the internal combustion engine is stopped. It is characterized by adjusting. According to the present invention described in claim 14, by increasing the cooling effect before stopping the operation of the internal combustion engine, even if the supply of cooling water is stopped due to the stop of the internal combustion engine, The surface temperature can be overshooted so that it does not exceed the upper limit temperature.

  In the ship corresponding to this invention of Claim 15, the thermoelectric power generation system for ships in any one of Claims 1-14 was mounted. According to the present invention of the fifteenth aspect, a marine thermoelectric power generation system capable of maintaining a stable long-term power generation operation can be used.

  According to the present invention, even when water intake is stopped, the thermoelectric power generation means is exposed to the water around the hull, so that the thermoelectric power generation means can be cooled stably.

  In addition, when the temperature control means for controlling the temperature in the high temperature part by adjusting the cooling water supplied by the mixer means is provided, the surface temperature of the high temperature part of the thermoelectric power generation means is adjusted to an appropriate temperature for stable long term The power generation operation can be maintained.

  Further, when controlling the temperature control means based on the upper limit temperature of use of the thermoelectric power generation means, the surface temperature of the high temperature portion of the thermoelectric power generation means can be adjusted to an appropriate temperature according to the specifications of the thermoelectric power generation means used. it can.

  Further, when the temperature control means includes a temperature detection means for detecting the temperature in the high temperature part and the temperature control means controls the mixer means based on the detected value of the temperature detection means and the upper limit temperature for use, the thermoelectric power generation means is set to the upper limit temperature for use. A stable long-term power generation operation can be maintained without being exposed to a high temperature exceeding.

  Moreover, when the temperature control means controls the power generation output of the thermoelectric power generation means by adjusting the temperature difference between the high temperature part and the low temperature part at a temperature equal to or lower than the use upper limit temperature, the power generation amount can be improved.

  Further, when the mixer means has an opening that opens to the exhaust gas path upstream of the thermoelectric power generation means, and the cooling water is injected from the opening in the flow direction of the exhaust gas, the temperature of the exhaust gas is quickly increased. In addition to being able to reduce, the flow of exhaust gas is not hindered, thereby preventing adverse effects on the internal combustion engine.

  Further, the opening has a porous structure, and when the cooling water is injected in a shower shape, the temperature of the exhaust gas can be further rapidly reduced.

  In addition, when the cooling water is continuously taken in by the water intake unit at least during the operation of the internal combustion engine and is continuously discharged after the internal combustion engine is cooled, the cooling water is more stable than when the cooling water is circulated. Cooling effect can be obtained.

  In addition, when a part of the cooling water taken is used as the cooling water injected from the opening, the cooling water can be supplied to the mixer means separately from the cooling water flowing through the cooling water path. It can be prevented that the cooling effect is impaired.

  In addition, when the temperature control means controls the flow rate of the cooling water by adjusting the flow rate adjustment valve provided in the cooling water path, the temperature reduction amount of the exhaust gas can be adjusted, so that the thermoelectric power can be reduced without reducing the power generation amount. The surface temperature of the high temperature part of the power generation means can be adjusted to an appropriate temperature.

  Further, when the thermoelectric power generation means is configured by arranging a plurality of thermoelectric power generation elements around the exhaust gas path and further connecting the thermoelectric power generation elements to the water section or the hull below the draft, the exhaust gas It is possible to efficiently receive heat from the path and dissipate heat to the cooling water path.

  In addition, when heat transfer fins are provided on the inner surface of the exhaust gas path where the thermoelectric power generation element is disposed and / or the intake section where the thermoelectric power generation element is disposed or the hull below the draft, the amount of heat received from the exhaust gas path The amount of heat released from the hull below the intake section or draft can be increased.

  In addition, when a sealing material having compressibility and heat resistance is provided around the thermoelectric power generation element and the sealing material is sandwiched between the exhaust gas path and the water intake section or the hull below the draft, the sealing material of the thermoelectric power generation element is used. Condensation and salt damage can be prevented, and durability can be enhanced. Moreover, since it becomes easy to make the surface pressure concerning each thermoelectric power generation element uniform, electric power generation efficiency can be improved.

  Further, when the temperature control means adjusts the supply amount of the cooling water before the operation of the internal combustion engine is stopped, by increasing the cooling effect before the operation of the internal combustion engine is stopped, Even if the supply of cooling water is stopped, the surface temperature of the high temperature portion of the thermoelectric generator can be overshooted so as not to exceed the upper limit temperature.

  Moreover, according to the ship of this invention, the thermoelectric power generation system for ships which can maintain the stable long-term power generation operation can be utilized.

The block diagram of the thermoelectric power generation system for ships by embodiment of this invention A perspective view of thermoelectric power generation means of the marine thermoelectric power generation system The principal part expanded sectional view and A-A 'sectional view which show the mixer means of the thermoelectric power generation system for ships

  Below, the thermoelectric power generation system for ships by the embodiment of the present invention is explained.

FIG. 1 is a configuration diagram of a marine thermoelectric power generation system according to an embodiment of the present invention.
As shown in FIG. 1, the ship 1 is equipped with an internal combustion engine 10. Exhaust gas exhausted from the internal combustion engine 10 is exhausted through an exhaust gas path 20 constituted by an exhaust pipe. Cooling water is supplied to the internal combustion engine 10 from the cooling water passage 30. The cooling water is continuously taken in by the water intake unit 31 at least during the operation of the internal combustion engine 10 and is continuously discharged after the internal combustion engine 10 is cooled.

  Thermoelectric power generation means 40 that receives heat from the exhaust gas path 20 and dissipates heat to the water intake part 31 is provided facing the exhaust gas path 20 and the water intake part 31. The thermoelectric power generation means 40 includes a heating block 41, a cooling block 42, and a thermoelectric power generation element 43. The heating block 41 is configured by a part of the exhaust gas path 20, and the cooling block 42 is configured by the water intake unit 31. The intake section 31 is disposed in the hull 2 below the draft.

  Mixer means 50 is provided in the exhaust gas path 20 upstream of the thermoelectric power generation means 40. In the mixer means 50, the cooling water supplied from the cooling water passage 30 is mixed with the exhaust gas in the exhaust gas passage 20.

The temperature control means 61 controls the flow rate of the cooling water by adjusting the flow rate adjustment valve 33 provided in the cooling water path 30, adjusts the cooling water supplied from the mixer means 50, and controls the exhaust gas flowing through the exhaust gas path 20. The temperature, that is, the temperature in the high temperature portion of the thermoelectric generator 40 is controlled.
In addition, the temperature control means 61 controls the flow rate of the cooling water by adjusting the flow rate adjustment valve 34 provided in the cooling water path 30, and adjusts the cooling water flowing through the intake portion 31, so that the temperature of the thermoelectric power generation means 40 is low. Control the temperature in the section.
The thermoelectric power generation means 40 is provided with a temperature detection means 62 for detecting the temperature in the high temperature part. The temperature detector 62 may detect the temperature of the exhaust gas flowing through the exhaust gas path 20 upstream of the thermoelectric generator 40 and estimate the temperature of the high temperature portion of the thermoelectric generator 40.

The temperature control means 61 controls the mixer means 50 based on the detected value of the temperature detection means 62 and the use upper limit temperature of the thermoelectric generation element 43, thereby exposing the thermoelectric generation element 43 to a high temperature exceeding the use upper limit temperature. And stable and long-term power generation operation can be maintained.
Further, the temperature control means 61 controls the power generation output of the thermoelectric power generation means 40 by adjusting the temperature difference between the high temperature part and the low temperature part at a temperature equal to or lower than the upper limit use temperature of the thermoelectric power generation element 43, thereby improving the power generation amount. Can be made.
Further, the temperature control means 61 can adjust the flow rate of the cooling water by adjusting the flow rate adjustment valve 34 provided in the cooling water path 30, thereby adjusting the temperature decrease amount of the exhaust gas, thereby reducing the power generation amount. The surface temperature of the high temperature portion of the thermoelectric generator 40 can be adjusted to an appropriate temperature.

  Further, the temperature control means 61 is preferably adjusted so as to increase the amount of cooling water supplied to the mixer means 50 before the operation of the internal combustion engine 10 is stopped. For example, the start / stop means 63 for starting and stopping the internal combustion engine 10 outputs a signal to the temperature control means 61 before issuing an instruction to stop the internal combustion engine 10, thereby supplying cooling water before the internal combustion engine 10 is stopped. The amount can be adjusted to increase. By increasing the cooling effect before the operation of the internal combustion engine 10 is stopped, even if the supply of cooling water is stopped due to the stop of the internal combustion engine 10, the surface temperature of the high temperature portion of the thermoelectric power generation element 43 is overshot. The maximum use temperature can be prevented from exceeding. The overshoot of the surface temperature of the high temperature portion of the thermoelectric power generation element 43 when the operation is stopped is relatively small because the thermoelectric power generation means 40 is exposed to the water portion 31 and dissipates heat to the surrounding water. It is preferable to perform the control as described above in order to ensure that the use upper limit temperature is not exceeded.

The cooling water path 30 is provided with a flow rate adjusting valve 35 that adjusts the flow rate of the cooling water to the mixing means provided downstream of the mixer means 50. The flow rate adjustment valve 35 is adjusted by the temperature control means 61. Although not shown, the mixing means injects the cooling water supplied from the cooling water passage 30 into the exhaust gas passage 20 to lower the temperature of the exhaust gas.
In FIG. 1, the cooling water that has cooled the internal combustion engine 10 is supplied to the mixer means 50 via the flow rate adjustment valve 33, but the cooling water before being supplied to the internal combustion engine 10 is supplied to the flow rate adjustment valve 33. May be supplied to the mixer means 50.

Heat transfer fins 22 are provided on the inner surface of the heating block 41 constituting the exhaust gas path 20. Each heat transfer fin 22 is provided upright on the inner surface of the heating block 41, and a flow path through which exhaust gas flows is formed between each heat transfer fin 22. By providing the heat transfer fins 22, the amount of heat received from the exhaust gas path 20 can be increased.
Moreover, the heat-transfer fin 42a is provided also in the water intake part 31 in which the thermoelectric generation element 43 is arrange | positioned. Each heat transfer fin 42a is erected on the inner surface of the water intake section 31, and a flow path through which water flows is formed between each heat transfer fin 42a. By providing the heat transfer fins 42a, the amount of heat released to the water intake unit 31 can be increased.

The thermoelectric power generation means 40 is configured by arranging a plurality of thermoelectric power generation elements 43 around the exhaust gas path 20 and further sandwiching the thermoelectric power generation elements 43 by a cooling block 42.
The thermoelectric power generation element 43 has a high temperature part on one side and a low temperature part on the other side, and receives heat from the heating block 41 (exhaust gas path 20) at the high temperature part and to the cooling block 42 (water intake part 31) at the low temperature part. It generates electricity by dissipating heat.
The thermoelectric power generation element 43 is efficiently sandwiched between the exhaust gas path 20 and the water intake unit 31, thereby efficiently receiving heat from the exhaust gas path 20 and radiating heat to the water intake unit 31.

FIG. 2 is a perspective view of thermoelectric power generation means of the marine thermoelectric power generation system.
As shown in FIG. 2, a sealing material 44 having compressibility and heat resistance is provided around the thermoelectric power generation element 43. The sealing material 44 is sandwiched between the heating block 41 and the cooling block 42. By providing the sealing material 44, the adhesiveness of the thermoelectric power generation element 43 to the heating block 41 and the cooling block 42 can be increased, condensation or salt damage of the thermoelectric power generation element 43 can be prevented, and durability performance can be improved. In addition, the surface pressure applied to each thermoelectric power generation element 43 can be easily made uniform, and the power generation efficiency can be increased.

FIG. 3 is an enlarged cross-sectional view of a main part and a cross-sectional view taken along line AA ′ showing mixer means of the marine thermoelectric power generation system.
As shown in FIG. 3, the mixer means 50 has an inlet 51 for introducing cooling water from the cooling water path 30, a ring-shaped space 52, and an opening 53 that opens to the exhaust gas path 20.
The ring-shaped space 52 is formed in a ring shape on the outer periphery of the exhaust gas path 20. A large number of openings 53 are provided in a ring shape, and the cooling water is injected in the flow direction of the exhaust gas.
The cooling water is guided from the inlet 51 to the ring-shaped space 52 and is injected from the opening 53 to the exhaust gas path 20.
By injecting the cooling water from a large number of openings 53 provided in a ring shape in the flow direction of the exhaust gas, the temperature of the exhaust gas can be quickly reduced and the flow of the exhaust gas is not hindered. The adverse effect of increasing the load can be prevented. The opening 53 has a porous structure, and it is preferable to spray the cooling water in a shower shape. The temperature of the exhaust gas can be further rapidly reduced by spraying in a shower form.

In addition, although embodiment of this invention demonstrated the case where the thermoelectric power generation means 40 was provided in the water part 31, you may provide in the hull 2 below draft. That is, the thermoelectric power generation element 43 is configured to be connected in heat transfer to the hull 2 below the draft instead of the water portion 31. In this case, it is preferable to provide the heat transfer fins 42a on the hull 2 below the draft where the thermoelectric power generation elements 43 are arranged. Moreover, it is preferable that the hull 2 below the draft in which the thermoelectric power generation element 43 is disposed and the exhaust gas path 20 (heating block 41) are sandwiched by the sealing material 44. By providing the thermoelectric power generation means 40 in the hull 2 below the draft, it is possible to use inexhaustible water around the hull 2 as a cooling source, similarly to the case where it is provided in the water intake section 31.
Further, when the thermoelectric generation element 43 is waterproof, it is possible to directly expose the thermoelectric generation element 43 to the water around the hull 2 and expose it to the water.

As described above, the marine thermoelectric power generation system according to the present embodiment includes the thermoelectric power generation means 40 that generates power by radiating heat to the intake portion 31 of the cooling water path 30 or the hull 2 below the draft at the low temperature portion. Even when the water intake is stopped, since the thermoelectric power generation means 40 is exposed to the water around the hull 2, the thermoelectric power generation means 40 can be cooled stably.
Further, by providing the temperature control means 61 for controlling the temperature in the high temperature part by adjusting the cooling water supplied by the mixer means 50, the surface temperature of the high temperature part of the thermoelectric power generation means 40 is adjusted to an appropriate temperature and stable. Long-term power generation operation can be maintained.
Further, by controlling the temperature control means 61 based on the upper limit temperature of use of the thermoelectric power generation element 43 used in the thermoelectric power generation means 40, the surface temperature of the high temperature portion of the thermoelectric power generation means 40 according to the specifications of the thermoelectric power generation element 43 to be used. Can be adjusted to an appropriate temperature.

  By installing the marine thermoelectric power generation system of the present invention, the thermoelectric power generation means can be stably cooled even when water intake is stopped, and a stable long-term power generation operation can be maintained.

DESCRIPTION OF SYMBOLS 1 Ship 10 Internal combustion engine 20 Exhaust gas path 30 Cooling water path 31 Water intake part 33 Flow control valve 34 Flow control valve 40 Thermoelectric power generation means 41 Heating block 42 Cooling block 43 Thermoelectric power generation element 44 Sealing material 50 Mixer means 51 Opening 61 Temperature control Means 62 Temperature detection means 63 Start / stop means

Claims (15)

An exhaust gas path through which exhaust gas discharged from the internal combustion engine of the ship passes,
A cooling water path through which the cooling water for cooling the internal combustion engine passes;
Thermoelectric power generation for ships, comprising thermoelectric power generation means for generating heat by receiving heat from the exhaust gas path at a high temperature part and dissipating heat to a water intake part of the cooling water path or below the draft at a low temperature part system. Mixer means for mixing the cooling water with the exhaust gas in the exhaust gas path;
The marine thermoelectric power generation system according to claim 1, further comprising temperature control means for adjusting the cooling water supplied by the mixer means to control the temperature in the high temperature part.   The marine thermoelectric power generation system according to claim 2, wherein the temperature control means is controlled based on a use upper limit temperature of the thermoelectric power generation means.   4. A temperature detection means for detecting the temperature in the high temperature part, wherein the temperature control means controls the mixer means based on a detection value of the temperature detection means and the upper limit temperature for use. The marine thermoelectric power generation system described in 1.   The said temperature control means controls the electric power generation output of the said thermoelectric power generation means by adjusting the temperature difference of the said high temperature part and the said low temperature part by the temperature below the said use upper limit temperature. 4. A marine thermoelectric power generation system according to 4.   The said mixer means has an opening part opened to the said exhaust gas path | route upstream from the said thermoelectric power generation means, The said cooling water is injected in the flow direction of the said exhaust gas from the said opening part. The marine thermoelectric power generation system according to any one of claims 2 to 5.   The marine thermoelectric power generation system according to claim 6, wherein the opening has a porous structure, and the cooling water is injected in a shower shape.   8. The cooling water according to claim 1, wherein the cooling water is continuously taken in by the water intake section at least during the operation of the internal combustion engine, and is continuously discharged after the internal combustion engine is cooled. A marine thermoelectric power generation system according to claim 1.   The marine thermoelectric power generation system according to claim 6 or 7, wherein a part of the taken cooling water is used as the cooling water sprayed from the opening.   The marine thermoelectric power generation according to any one of claims 2 to 9, wherein the temperature control means controls a flow rate of the cooling water by adjusting a flow rate adjusting valve provided in the cooling water path. system.   The thermoelectric power generation means is configured by arranging a plurality of thermoelectric power generation elements around the exhaust gas path, and further connecting the thermoelectric power generation elements in heat transfer to the intake section or the hull below the draft. The marine thermoelectric power generation system according to any one of claims 1 to 10.   The heat transfer fin is provided in the inner surface of the exhaust gas path in which the thermoelectric power generation element is disposed and / or the water intake section in which the thermoelectric power generation element is disposed or the hull below the draft. The marine thermoelectric power generation system described in 1.   12. A sealing material having compressibility and heat resistance is provided around the thermoelectric power generation element, and the sealing material is sandwiched between the exhaust gas path and the water intake section or the hull below draft. A marine thermoelectric power generation system according to claim 12.   The marine thermoelectric power generation system according to any one of claims 2 to 13, wherein the temperature control means adjusts the supply amount of the cooling water before the operation of the internal combustion engine is stopped.   A marine vessel equipped with the marine thermoelectric power generation system according to any one of claims 1 to 14.