JP2009248013A - Fresh water generating apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fresh water generating apparatus capable of efficiently utilizing calories that circulating cooling water for cooling an internal combustion engine has. <P>SOLUTION: The fresh water generating apparatus 1 includes: the internal combustion engine 2; a plurality of fresh water generators 3 and 4 for producing fresh water from seawater with the circulating cooling water for cooling the internal combustion engine 2 as a heat source; a circulation pipeline 5 for connecting the internal combustion engine 2 and the plurality of fresh water generators 3 and 4 and circulating the circulating cooling water; a temperature sensor T1 for detecting the temperature of the exit side cooling water of the internal combustion engine 2 in the circulation pipeline 5; and a control part 7 for controlling the fresh water generating amount of the plurality of fresh water generators. The control part 7 controls the fresh water generating amount of the plurality of fresh water generators 3 and 4 on the basis of temperature signals from the temperature sensor T1. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a fresh water generator, and more particularly to a fresh water generator that produces fresh water from seawater using circulating cooling water for cooling an internal combustion engine as a heat source fluid.

  Conventionally, in places where water supply cannot be received, for example, ships navigating offshore, there is a limit to the amount of fresh water that is replenished at the time of landing. Must be manufactured in-house. Therefore, such a ship is usually equipped with a fresh water generator that produces fresh water using seawater.

  Here, as a desalinator for producing fresh water from seawater, for example, there is a distillation type apparatus that obtains fresh water by distilling seawater. This distillation type fresh water generator includes an evaporating unit for evaporating seawater and a condensing unit for condensing evaporated vapor, and cooling and condensing the seawater evaporated in the evaporating unit in the condensing unit. Fresh water that is distilled water is obtained. And as a heat source which evaporates seawater, the circulating cooling water which cools internal combustion engines, such as a diesel engine mounted in the ship, is utilized.

  By the way, the fresh water generator using the circulating cooling water of the internal combustion engine as described above has a problem that the circulating cooling water cannot be cooled if the fresh water generator stops operating due to a failure or the like. If the heat exchange of the circulating cooling water cannot be performed, the internal combustion engine cannot be cooled by the circulating cooling water, which may cause a failure of the internal combustion engine.

On the other hand, a first heat exchanger and a fresh water generator provided with a second heat exchanger are provided in series in the circulation line of the circulating cooling water, and the fresh water is second heat exchanged. A technique is disclosed in which fresh water is produced by condensing the steam after heating in a cooler, while cooling the circulating cooling water with cooling seawater using a first heat exchanger (see, for example, Patent Document 1). The fresh water generator described in Patent Document 1 is provided with a first heat exchanger and a fresh water generator including a second heat exchanger, so that, for example, even if one heat exchanger fails, the other Since the circulating cooling water can be cooled by the side heat exchanger, the situation where the cooling of the internal combustion engine stops can be prevented.
JP 2003-245656 A

  However, while the fresh water generator described in Patent Document 1 produces fresh water with the fresh water generator, the amount of heat of the circulating cooling water that cannot be processed by the fresh water generator is in the first heat exchanger that is a heat exhaust device. It is exhausted into the sea. Thereby, there existed a problem that the calorie | heat amount with which circulating cooling water was provided could not be utilized effectively.

  In addition, for example, for diesel engines used in ships and the like, it is considered that water emulsion fuel capable of reducing pollutants such as NOx, SOx, and dust will be used in the future. Therefore, it is necessary to newly produce a large amount of water necessary for producing the water emulsion fuel. Here, in order to produce a large amount of water, it is conceivable to newly install a fresh water generator having a large amount of fresh water. There are cases where the water device cannot be installed, and there is a problem that it takes enormous cost to newly install a water producing device having a large amount of water.

  This invention is made | formed in view of the said subject, Comprising: It aims at providing the fresh water generator which can utilize efficiently the calorie | heat amount which the circulating cooling water which cools an internal combustion engine has.

  The present inventors can install a plurality of fresh water generators by installing a fresh water generator instead of a heat exchanger used only for exhaust heat, and output the multiple fresh water generators to an internal combustion engine. By adjusting based on the temperature of the circulating cooling water of the engine, it has been found that water can be efficiently formed, and the present invention has been completed. Specifically, the following fresh water generator is provided.

  (1) An internal combustion engine, a plurality of fresh water generators for producing fresh water from seawater using circulating cooling water for cooling the internal combustion engine as a heat source, the internal combustion engine and the plurality of fresh water generators are connected, and A circulation pipe that circulates the circulating cooling water, a temperature sensor that detects a temperature of the outlet-side cooling water of the internal combustion engine in the circulation pipe, and a control unit that controls the amount of water produced by the plurality of fresh water generators. And the control unit controls the amount of water generated by the plurality of water generators based on a temperature signal from the temperature sensor.

  (2) Further, each of the fresh water generators includes a plurality of valves that connect each fresh water generator and the circulation pipeline, and the control unit controls opening and closing of the valves. The fresh water generator as described in (1).

  (3) A plurality of bypass parts are provided in the circulation pipeline, and each fresh water generator is connected to each bypass part, and the fresh water described in (1) or (2) apparatus.

  (4) The fresh water generator according to any one of (1) to (3), wherein the plurality of fresh water generators are arranged so that the fresh water generators are arranged in series with respect to the circulation pipe.

  (5) The fresh water generator according to any one of (1) to (3), wherein the plurality of fresh water generators are arranged so that the fresh water generators are arranged in parallel with respect to the circulation pipe.

  ADVANTAGE OF THE INVENTION According to this invention, the fresh water generator which can utilize efficiently the calorie | heat amount which the circulating cooling water which cools an internal combustion engine can be provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, embodiment of this invention is not limited to the following embodiment at all, and the technical scope of this invention is not limited to this.

  FIG. 1 is a flow sheet of a fresh water generator according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing the internal configuration of the fresh water generator according to the embodiment. FIG. 3 is a flowchart showing a control process of the fresh water generator according to the embodiment. FIG. 4 is a flowchart showing a fresh water generation control process of the fresh water generator according to the embodiment.

  The fresh water generator 1 according to the present embodiment is a fresh water generator for a ship, and as a heat source fluid for heating seawater, a coolant after cooling a ship engine, in this embodiment, a diesel engine 2. That is, circulating cooling water is used. And the fresh water generator 1 is comprised so that a vapor | steam may be generated by heating seawater in a pressure-reduced state. The fresh water generator 1 also uses seawater as condensed cooling water for condensing steam.

  First, the structure of the fresh water generator 1 is demonstrated. As shown in FIG. 1, a fresh water generator 1 according to this embodiment includes a diesel engine 2 that is an internal combustion engine mounted on a ship, and a first temperature that measures the temperature of circulating cooling water on the outlet side of the diesel engine 2. A sensor T1, a second temperature sensor T2 that measures the temperature of the circulating cooling water on the inlet side of the diesel engine 2, and a first fresh water generator 3 and a second fresh water generator 4 based on the temperature of the first temperature sensor T1. The controller (control part) 7 to control, the 1st fresh water generator 3 which manufactures fresh water from seawater, and the 2nd fresh water generator 4 which similarly manufactures fresh water from seawater are provided.

  The diesel engine 2, the first fresh water generator 3, and the second fresh water generator 4 are connected by a circulation pipe 5 that circulates circulating cooling water that cools the diesel engine 2. Since the circulation pipe 5 is basically for cooling the diesel engine 2 with the circulating cooling water, it goes without saying that the circulating cooling water is circulated in the diesel engine 2.

  The diesel engine 2 is an internal combustion engine that is responsible for the operation of the ship. Basically, the diesel engine 2 is operated during the navigation of the ship. A first temperature sensor T <b> 1 is provided in the circulation line 5 on the outlet side of the circulating cooling water of the diesel engine 2. The first temperature sensor T <b> 1 detects the temperature of the circulating cooling water that circulates inside the diesel engine 2. Similarly, a second temperature sensor T2 is provided in the circulation line 5 on the inlet side of the circulating cooling water of the diesel engine 2. The second temperature sensor T <b> 2 detects the temperature of the circulating cooling water circulated into the diesel engine 2. Each of the first temperature sensor T1 and the second temperature sensor T2 is connected to a controller 7 which is a control unit described later.

  The controller 7 controls the first fresh water generator 3 and the second fresh water generator 4 based on the temperature of the first temperature sensor T1. Specifically, the controller 7 is connected to a first valve 51, a second valve 52, a third valve 55, and a fourth valve 56, which will be described later, and opens and closes each valve based on the temperature of the first temperature sensor T1. I do. The controller 7 is also connected to the first fresh water generator 3 and the second fresh water generator 4. The controller 7 activates the first fresh water generator when the third valve 55 is opened, and activates the second fresh water generator 4 when the fourth valve 56 is opened.

  The circulating cooling water circulating in the circulation pipe 5 is circulated in the circulation pipe 5 by a circulation pump 6 provided in the circulation pipe 5.

  The 1st fresh water generator 3 and the 2nd fresh water generator 4 are arrange | positioned in series with respect to the circulation pipe line 5 via the below-mentioned bypass. Specifically, the first fresh water generator 3 is connected to a first bypass portion 53 provided on the downstream side of the circulation pipeline 5. The second desalinator 4 is connected to a second bypass part 54 provided downstream from the first bypass part 53.

A first valve 51 is provided between the inlet and the outlet of the first bypass part 53 in the circulation line 5 where the first bypass part 53 is provided. In addition, a third valve 55 is provided on the downstream side of the first fresh water generator 3 in the first bypass portion 53.
Similarly, a second valve 52 is provided between the inlet and the outlet of the second bypass portion 54 in the circulation pipe 5 where the second bypass portion 54 is provided. Further, a fourth valve 56 is provided on the downstream side of the second fresh water generator 4 in the second bypass portion 54.

  In the present embodiment, the first and third valves (second and fourth valves) are provided in the periphery of the first bypass portion 53 (second bypass portion 54). A three-way valve may be provided at the inlet of the first bypass portion 53 (second bypass portion 54) and adjusted by the controller 7.

  Next, the 1st fresh water generator 3 and the 2nd fresh water generator 4 which concern on this embodiment are demonstrated. In addition, in this embodiment, since the 1st fresh water generator 3 and the 2nd fresh water generator 4 use the same type, description of the 2nd fresh water generator 4 is abbreviate | omitted.

  First, the structure of the 1st fresh water generator 3 (2nd fresh water generator 4) which concerns on this embodiment is demonstrated. As shown in FIG. 2, the first fresh water generator 3 (second fresh water generator 4) includes an evaporation unit 300 (400) for evaporating seawater and a condensing unit 301 (401) for condensing evaporated vapor. ing. The first fresh water generator 3 (second fresh water generator 4) obtains fresh water as distilled water by cooling and condensing the seawater evaporated in the evaporation section 300 (400) in the condensing section 301 (401). This is a so-called distillation type fresh water generator.

  The condensing unit 301 (401) is provided via a casing 302 connected to the evaporation unit 300 (400), and the inside of the casing 302 sends steam from the evaporation unit 300 (400) to the condensing unit 301 (401). It is a flow path for supplying.

  The evaporation unit 300 (400) includes an upper header 303 and a lower header 304 that are installed vertically at a predetermined distance. The upper header 303 and the lower header 304 are connected by a first body member 306 for defining an introduction space 305 for circulating cooling water (heat source fluid). The first body member 306 is formed in a cylindrical shape. In the first body member 306, a plurality of heating tubes 307 are arranged in an introduction space 305 that is the inside thereof. The upper end portion of each heating tube 307 is connected to the upper header 303, and the lower end portion of each heating tube 307 is connected to the lower header 304. Further, the top of the upper header 303 is connected to the casing 302.

  A discharge line 308 (408) having a vacuum suction unit (not shown) is connected to the bottom of the upper pipe 303. Accordingly, the upper header 303 functions as a concentrated seawater discharge unit. In addition, a seawater supply line 309 (409) is connected to the lower header 304. Therefore, the lower header 304 functions as a seawater supply unit. Seawater is pulled up from the sea by a pump 310 (410) via a seawater supply line 309 (409).

  Furthermore, a circulating cooling water introduction line 311 (411) is connected to the lower part of the peripheral wall of the first body member 306. The circulating cooling water introduction line 311 (411) is arranged on the upstream side of the first bypass part 53 (second bypass part 54). A circulating cooling water lead-out line 312 (412) is connected to the upper part of the peripheral wall of the first body member 306. The circulating cooling water lead-out line 312 (412) is disposed on the downstream side of the first bypass portion 53 (second bypass portion 54). That is, the circulating cooling water introduction line 311 (411) and the circulating cooling water lead-out line 312 (412) sandwich the first fresh water generator 3, and the circulating cooling water introduction line 311 (411) is the first fresh water generator 3. The circulating cooling water lead-out line 312 (412) is disposed on the upstream side, and is disposed on the downstream side of the first fresh water generator 3.

  Here, a partition plate 313 arranged substantially horizontally is provided at a substantially central portion in the vertical direction inside the first body member 306. The partition plate 313 prevents the circulating cooling water from short-passing between the circulating cooling water introduction line 311 (411) and the circulating cooling water outlet line 312 (412). Are reliably brought into contact with each other, and heat transfer to each heating tube 307 is promoted.

  The condensing unit 301 includes a second barrel member 316 provided substantially horizontally through the casing 302 and left and right pipes 317 and 317 provided at both ends of the second barrel member 316, respectively. 318. The second body member 316 is formed in a cylindrical shape. The second body member 316 has a plurality of cooling pipes 320 disposed therein. One end of each cooling pipe 320 is connected to the left pipe 317 and the other end is connected to the right pipe 318. In addition, an opening 321 for introducing steam from the evaporation unit 300 is formed above the center portion of the second body member 316 in the casing 302.

  In addition, a coolant introduction line 322 is connected to the left pipe 317, and a coolant discharge line 323 is connected to the right pipe 318. Further, a distilled water outlet line 324 is connected to the right bottom portion of the second body member 316. The obtained distilled water (fresh water) is drawn out by the pump 325 (425) via the distilled water outlet line 324 and stored in the storage tank 10.

  Next, the operation of the first fresh water generator 3 (second fresh water generator 4) according to this embodiment will be described. When starting the operation of the fresh water generator 1, the first fresh water generator 3 (second fresh water generator 4) operates a vacuum suction part (not shown) to preliminarily discharge the casing 302 from the discharge line 308 (408). The gas in the inner pipe 303 and the upper pipe 303 is discharged, and the pressure in the upper pipe 303 and the casing 302 is reduced.

  Next, supply of seawater from the seawater supply line 309 to the lower pipe 304 is started. The seawater is sucked into each heating pipe 307 from the seawater supply line 309 through the lower pipe 304 because the inside of the casing 302 and the upper pipe 303 are decompressed. After this seawater is supplied, seawater as cooling liquid is supplied from the circulating cooling water supply line 322 (422) via the left pipe 317 into each cooling pipe 320, and from the circulating cooling water supply line 311 to the inside of the introduction space 305. Supply circulating cooling water to

  When the circulating cooling water is supplied into the introduction space 305, the seawater in each heating pipe 307 is heated by the circulating cooling water in the introduction space 305 and evaporates. Then, this steam flows into the upper pipe 303. Further, the seawater in each heating pipe 307 is concentrated by evaporation of water, and this concentrated seawater also flows from each heating pipe 307 into the upper header 303.

  The steam that has flowed into the upper pipe 303 further flows into the casing 302 and flows in the casing 302 toward the second body member 316. Then, the steam that has flowed into the upper header 303 flows into the second barrel member 316 from the opening 321 formed above the center portion of the second barrel member 316 in the casing 302. The steam that has flowed into the second body member 316 is condensed by being cooled by each cooling pipe 320 and becomes distilled water. The distilled water stays on the second body member 316 and is taken out from the distilled water outlet line 324 and stored in the water storage tank 10.

  Next, the control process of the fresh water generator 1 which concerns on this embodiment is demonstrated. As shown in FIG. 3, prior to the fresh water control process, the fresh water generator 1 first determines whether or not the diesel engine (main engine) 2 in the ship is activated (step S1). If the diesel engine 2 is activated, the process proceeds to step S2, and if the diesel engine 2 is not activated, the monitoring of the diesel engine 2 activation is continued until the diesel engine 2 is activated.

  Next, when starting of the diesel engine 2 is confirmed, the fresh water generator 1 operates the circulation pump 6 (step S2). When the circulation pump 6 is operated, the fresh water generator 1 starts fresh water control processing by the controller 7 (step S3).

  When the predetermined fresh water generation control process is completed, the fresh water generator 1 next determines that the diesel engine 2 is stopped (step S4). Here, if the diesel engine 2 is not stopped, there is a possibility that it is necessary to perform fresh water generation control, so the process returns to step S3. If the diesel engine 2 is stopped, the circulation pump is stopped (step S5), and the control is terminated.

  Next, with reference to FIG. 4, the fresh water control process performed by the controller 7 of the fresh water generator 1 is demonstrated. First, the controller 7 determines whether or not the temperature indicated by the first temperature sensor T1 is 80 ° C. or less (step S10). That is, it is determined whether or not the temperature of the circulating cooling water on the outlet side of the diesel engine 2 is 80 ° C. or less.

  When the temperature of the circulating cooling water on the outlet side of the diesel engine 2 is 80 ° C. or lower, first, the open / close state of the first valve 51 is determined (step S11). Here, when the first valve 51 is closed, the first valve 51 is opened (step S12), and when the first valve 51 is opened, the process proceeds to step S13.

  In step S13, the open / close state of the third valve 55 is determined. Here, when the third valve 55 is opened, the third valve 55 is closed (step S14), and when the third valve 55 is opened, the process proceeds to step S15.

  In step S15, the open / close state of the second valve 52 is determined. Here, when the second valve 52 is closed, the second valve 52 is opened (step S16), and when the second valve 52 is opened, the process proceeds to step S17.

  In step S17, the open / close state of the fourth valve 56 is determined. Here, if the fourth valve 56 is open, the fourth valve 56 is closed (step S18), and if the fourth valve 56 is closed, the process proceeds to step S19.

  In step S19, the controller 7 stops the 1st fresh water generator 3 and the 2nd fresh water generator 4 based on the said state of each valve | bulb. In addition, when the 1st fresh water generator 3 and the 2nd fresh water generator 4 are not starting, the state is maintained. On the contrary, when the 1st water generator 3 and the 2nd water generator 4 are starting, the 1st water generator 3 and the 2nd water generator 4 are stopped.

  Then, it moves to step S40. In step S40, it is determined whether or not the diesel engine 2 (main engine) is stopped. Here, if the diesel engine 2 has stopped, the controller 7 will stop the 1st fresh water generator 3 and the 2nd fresh water generator 4 (step S41), and will end fresh water control processing. If the diesel engine 2 is not stopped, the process returns to step S10.

  Next, when the temperature indicated by the first temperature sensor T1 is 80 ° C. or higher, it is further determined whether or not the temperature indicated by the first temperature sensor T1 is 85 ° C. or lower (step S20). That is, it is determined whether or not the temperature of the circulating cooling water on the outlet side of the diesel engine 2 is 85 ° C. or less.

  When the temperature of the circulating cooling water on the outlet side of the diesel engine 2 is 85 ° C. or lower, that is, between 80 and 85 ° C., first, the open / close state of the third valve 55 is determined (step S21). Here, when the third valve 55 is closed, the third valve 55 is opened (step S22), and when the third valve 55 is opened, the process proceeds to step S23.

  In step S23, the open / close state of the first valve 51 is determined. Here, when the first valve 51 is opened, the first valve 51 is closed (step S24), and when the first valve 51 is opened, the process proceeds to step S25.

  In step S25, the open / close state of the second valve 52 is determined. Here, when the second valve 52 is closed, the second valve 52 is opened (step S26), and when the second valve 52 is opened, the process proceeds to step S27.

  In step S27, the open / close state of the fourth valve 56 is determined. Here, when the fourth valve 56 is opened, the fourth valve 56 is closed (step S28), and when the fourth valve 56 is opened, the process proceeds to step S29.

  In step S29, the controller 7 starts the 1st fresh water generator 3 based on the said state of each valve | bulb. In addition, when the 1st fresh water generator 3 and the 2nd fresh water generator 4 have not started, only the 1st fresh water generator 3 is started and the 2nd fresh water generator 4 maintains the state. On the contrary, when the 1st fresh water generator 3 and the 2nd fresh water generator 4 are starting, the start of only the 1st fresh water generator 3 is maintained and the 2nd fresh water generator 4 is stopped.

  Then, it moves to step S40. In step S40, it is determined whether or not the diesel engine 2 (main engine) is stopped. Here, if the diesel engine 2 has stopped, the controller 7 will stop all the water generators (step S41), and will end fresh water control processing. If the diesel engine 2 is not stopped, the process returns to step S10.

  Next, when the temperature of the circulating cooling water on the outlet side of the diesel engine 2 is 85 ° C. or higher, first, the open / close state of the third valve 55 is determined (step S31). Here, when the third valve 55 is closed, the third valve 55 is opened (step S32), and when the third valve 55 is opened, the process proceeds to step S33.

  In step S33, the open / close state of the first valve 51 is determined. Here, when the first valve 51 is opened, the first valve 51 is closed (step S34), and when the first valve 51 is opened, the process proceeds to step S35.

  In step S35, the open / close state of the fourth valve 56 is determined. Here, if the fourth valve 56 is closed, the fourth valve 56 is opened (step S36), and if the fourth valve 56 is opened, the process proceeds to step S37.

  In step S37, the open / close state of the second valve 52 is determined. If the second valve 52 has been opened, the second valve 52 is closed (step S38). If the second valve 52 has been opened, the process proceeds to step S39.

  In step S39, the controller 7 starts the 1st fresh water generator 3 and the 2nd fresh water generator 4 based on the said state of each valve | bulb.

  Then, it moves to step S40. In step S40, it is determined whether or not the diesel engine 2 (main engine) is stopped. Here, if the diesel engine 2 has stopped, the controller 7 will stop all the fresh water generators (step S41), and will end fresh water processing. If the diesel engine 2 is not stopped, the process returns to step S10.

  Thus, according to the present embodiment, the diesel engine is made by making the first fresh water generator 3 and the second fresh water generator 4 generate water based on the temperature T1 of the circulating cooling water on the outlet side of the diesel engine 2. It becomes possible to keep the temperature of the circulating cooling water on the inlet side of 2 constant. That is, even when the load on the diesel engine 2 is improved, the diesel engine 2 can be efficiently cooled.

  Further, according to the present embodiment, by using the first fresh water generator 3 and the second fresh water generator 4 (a plurality of fresh water generators), the amount of heat generated by the diesel engine 2 (the amount of heat included in the circulating cooling water) is discharged. It can be used effectively without heating, and can produce a large amount of water.

  Further, for example, even when a plurality of fresh water generators are installed, it is possible to install a plurality of fresh water generators while suppressing the cost for capital investment by using an existing circulation pipeline. For example, when an existing heat exchanger is installed, the installation cost can be suppressed by using the existing heat exchanger instead of the existing heat exchanger.

  In addition, for example, even when there is no space for installing a large fresh water generator, a large amount of water can be produced by installing a plurality of small fresh water generators.

  Moreover, since the 1st fresh water generator 3 and the 2nd fresh water generator 4 are attached to the 1st bypass part 53 and the 2nd bypass part 54, for example, the 1st fresh water generator 3 or the 2nd fresh water generator 4 is out of order etc. Even if it is necessary to replace by this, it can be easily replaced. Further, the diesel engine 2 can be replaced without being stopped.

  In addition, in this embodiment, although demonstrated using two fresh water generators, the 1st fresh water generator 3 and the 2nd fresh water generator 4, in this invention, it is not restricted to this. For example, in addition to the 1st water generator 3 and the 2nd water generator 4, you may install several water generators, such as a 3rd water generator and a 4th water generator. The fresh water generator 1 may be configured to control each of the plurality of fresh water generators according to the output characteristics of the diesel engine 2 or the like.

  Moreover, in this embodiment, although the 1st water generator 3 and the 2nd water generator 4 of the same output were installed, in this invention, it is not restricted to this. For example, fresh water generators having different outputs may be installed in accordance with the output characteristics of the diesel engine 2. For example, a fresh water generator with a large output may be installed as the first fresh water generator, and a fresh water generator with a small output may be installed in the second fresh water generator 4.

  Moreover, in this embodiment, although the 1st fresh water generator 3 and the 2nd fresh water generator 4 were arrange | positioned so that it might become in series with respect to the circulation pipeline 5, it is not restricted to this in this invention. For example, you may arrange | position the 1st fresh water generator 3 and the 2nd fresh water generator 4 so that it may become parallel with respect to the circulation pipe line 5. FIG. In the case where the first fresh water generator 3 and the second fresh water generator 4 are arranged in parallel, for example, maintenance such as replacement of the first fresh water generator 3 or the second fresh water generator 4 is facilitated. .

  In the present embodiment, the internal combustion engine is described using a diesel engine mounted on a ship. However, the present invention is not limited to this. For example, the internal combustion engine may be an internal combustion engine such as a gasoline engine. The internal combustion engine can also be used for an internal combustion engine used in an oil field drilling device or a plant facility in a factory at sea or in a desert area.

  Moreover, in this embodiment, the structure which controls opening and closing of the 1st valve 51, the 2nd valve 52, the 3rd valve 55, and the 4th valve 56 based on the temperature T1 of the circulating cooling water in the exit side of the diesel engine 2. However, the present invention is not limited to this. For example, the opening / closing of each valve may be controlled based on the temperature T2 of the circulating cooling water on the inlet side in addition to the temperature T1 of the circulating cooling water on the outlet side. The opening / closing of the first valve 51, the second valve 52, the third valve 55, and the fourth valve 56 may be controlled based on the temperature T2 of the circulating cooling water on the inlet side.

  Moreover, in this embodiment, although the fresh water generator 1 was set as the structure which controls opening and closing of each valve | bulb based on the temperature of 1st temperature sensor T1, it is not restricted to this in this invention. For example, it is good also as a structure which controls the opening / closing degree of each valve based on the temperature of 1st temperature sensor T1 using a flow control valve.

  Moreover, in this embodiment, although it was set as the structure which starts the 2nd water generator 4 when the temperature of circulating cooling water becomes 85 degreeC, in this invention, it does not restrict to this. For example, it is good also as a structure which starts the 2nd fresh water generator 4 by becoming 90 degreeC. That is, the starting condition temperature of the second fresh water generator 4 can be appropriately changed according to the maximum output of the diesel engine 2.

It is a flow sheet of a fresh water generator according to an embodiment of the present invention. It is sectional drawing which shows the internal structure of the fresh water generator which concerns on the said embodiment. It is a flowchart which shows the control processing of the fresh water generator which concerns on the said embodiment. It is a flowchart which shows the fresh water control process of the fresh water generator which concerns on the said embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fresh water generator 2 Internal combustion engine 3 1st fresh water generator 4 2nd fresh water generator 5 Circulation line 9 Controller 51 1st valve 52 2nd valve 55 3rd valve 56 4th valve T1 1st temperature sensor T2 2nd temperature Sensor

Claims (5)

An internal combustion engine;
A plurality of fresh water generators for producing fresh water from seawater using circulating cooling water for cooling the internal combustion engine as a heat source;
A circulation line for connecting the internal combustion engine and the plurality of water generators and circulating the circulating cooling water;
A temperature sensor for detecting the temperature of the outlet side cooling water of the internal combustion engine in the circulation line;
A controller that controls the amount of water produced by the plurality of fresh water generators,
The said control part controls the amount of fresh water of these fresh water generators based on the temperature signal from the said temperature sensor, The fresh water generator characterized by the above-mentioned. Furthermore, the fresh water generator comprises a plurality of valves each connecting each fresh water generator and the circulation pipe line,
The fresh water generator according to claim 1, wherein the control unit controls opening and closing of the valve. The circulation pipe is provided with a plurality of bypass parts,
Each fresh water generator is connected to each bypass part, The fresh water generator of Claim 1 or 2 characterized by the above-mentioned.   The fresh water generator according to any one of claims 1 to 3, wherein the plurality of fresh water generators are arranged such that the fresh water generators are in series with the circulation pipe line.   The fresh water generator according to any one of claims 1 to 3, wherein the plurality of fresh water generators are arranged so that the fresh water generators are arranged in parallel to the circulation pipe.

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