TW201714835A - Fresh water production system comprising a fresh water production device, a first cooling water passage, a second cooling water passage, a first circulating passage, and a second circulating passage - Google Patents

Abstract

To provide a fresh water production system which ensures that a sufficient amount of heat required for obtaining fresh water is secured even when the temperature of the jacket cooling water discharged from an internal combustion engine is reduced. A fresh water production system comprises: a fresh water production device 2 provided with a heater 3; a first cooling water passage 7 for circulating the scavenging air cooling water; a second cooling water passage 8 for circulating the jacket cooling water; a first circulating passage 9; a second circulating passage 10. Cooling water flowing through the first circulating passage 9 or cooling water flowing through the second circulating passage 10 is guided to the heater 3 for exchanging heat with the sea water. The first circulating passage 9, through which the cooling water is flowing and guided to the heater 3, is provided with an heat exchanger 16 at the upstream side of the heater 3 to enable the cooling water flowing through the circulating passage 9 to perform heat exchange with the cooling water flowing through other circulating passage 10. The other circulating passage 10 is provided, at the upstream side of the heat exchanger 16, with a flow rate adjusting valve 23 for adjusting the flow rate of the cooling water guided to the heat exchanger 16.

Description

Water production system

The present invention relates to a water-making system for producing fresh water from seawater, and more particularly to a water-making system that utilizes waste heat in an internal combustion engine such as a diesel engine (Diesel Engine).

Generally, in ships operating at sea, waste heat from a diesel engine mounted on a ship is used as a heat source, and in the past, seawater has been extracted from the sea by evaporation under high vacuum to produce fresh water. For example, the water generating device described in Patent Document 1 guides the jacket cooling water for cooling the diesel engine to the fresh water generator, and is desalinated by cooling water vapor generated by evaporation and condensation with seawater. In addition, the exhaust gas discharged from the diesel engine is also used for the heat required for desalination of seawater.

However, with the recent increase in the efficiency of the diesel engine, the main engine load (output) of the diesel engine is reduced (the amount of waste heat is reduced), and if the temperature of the jacket cooling water is lowered, the amount of heat of evaporation of the seawater is lowered. As a result, there is a problem that a sufficient amount of fresh water cannot be obtained. In addition, since the waste heat of the exhaust gas from the diesel engine is also reduced, it becomes necessary to secure the heat for obtaining a sufficient amount of fresh water.

[Previous Technical Literature] [Patent Literature]

Patent Document 1: JP-A-52-27916

The present invention has been made in view of the foregoing problems, and an object thereof is to provide a water generating system for obtaining a sufficient amount of heat of fresh water even when the temperature of the jacket cooling water discharged from the internal combustion engine (diesel engine) is lowered.

The above-described object of the present invention is achieved by a water-producing system that uses fresh water from an internal combustion engine mounted on a ship to produce fresh water from seawater introduced into a ship, and has a water-making device having heating a heater for seawater; a first cooling water passage for circulating cooling water to the air cooler, the air cooler cooling the combustion air supplied from the supercharger to the internal combustion engine; and the second cooling water passage for circulating the cooling water for cooling the internal combustion engine a first circulation passage that is diverted from the first cooling water passage and then recirculated to the first cooling water passage; and a second circulation passage that is diverted from the second cooling water passage and then recirculated to the second cooling water passage; and Cooling water flowing through the first circulation passage or cooling water flowing through the second circulation passage is guided to the heater and exchange heat with seawater; and the first circulation passage and the second circulation passage are guided to the heater a circulation passage through which the cooling water flows, wherein a heat exchanger is disposed on the flow side of the heater, and the heat exchanger is configured to flow cooling water flowing through the circulation passage Flowing a cooling water circulation passage of the other heat exchange; the other system circulation passage at the upstream of the heat exchanger A flow regulating valve is disposed on the side, and the flow regulating valve adjusts a flow rate of cooling water that is guided to the heat exchanger.

In the water-making system according to the first embodiment, it is preferable to further include a central cooler that cools the cooling water flowing through the first cooling water passage and the second cooling water passage.

Further, in the water-making system according to the first embodiment, it is preferable that the first circulation passage and the second circulation passage guide the circulation passage through which the cooling water of the heater flows, and the heat exchange is performed. A first temperature detector and a second temperature detector are disposed on the flow side and the downstream side of the apparatus, and the other circulation channel is provided with a third temperature detector on the upstream side of the heat exchanger.

Further, in the water generating system according to the first embodiment, it is preferable to further include a control device that is connected to the first temperature detector, the second temperature detector, the third temperature detector, and the a flow regulating valve; further comprising a central cooler, wherein the central cooling device measures the temperature of the cooling water of the other circulation passage when the temperature of the cooling water guided to the heater is lower than a set temperature; When the temperature is higher than the set temperature, the flow rate adjusting valve is opened to guide the cooling water to the heat exchanger.

Further, in the water generating system according to the first embodiment, preferably, the control device measures the temperature of the cooling water of the other circulation passage when the temperature of the cooling water guided to the heater is higher than the set temperature. When the temperature is lower than the set temperature, the flow rate adjusting valve is opened to guide the cooling water to the heat exchanger.

Further, in the water generating system according to the first embodiment, preferably, the control device measures the other when the temperature of the cooling water guided to the heater is higher than a set temperature. The temperature of the cooling water in the circulation passage, and when the temperature is higher than the set temperature, the central cooler is controlled to lower the temperature of the cooling water flowing through the first cooling water passage and the second cooling water passage.

The above object of the present invention can be achieved by the water-producing system of the second embodiment, which is characterized in that fresh water is produced from the seawater introduced into the ship from the waste heat of the internal combustion engine mounted on the ship. The invention includes a water generating device having a heater for heating sea water, a first cooling water passage for circulating cooling water to the air cooler, and the air cooler for cooling the combustion air supplied from the supercharger to the internal combustion engine; the second cooling water a passage for circulating cooling water to cool the internal combustion engine; the first circulation passage is diverted from the first cooling water passage and then recirculated to the first cooling water passage; and the second circulation passage is diverted from the second cooling water passage and then recirculated The second cooling water passage; and the cooling water flowing through the first circulation passage and the cooling water flowing through the second circulation passage are guided to the heater and seawater for heat exchange; and the first circulation passage flows over the heater a first temperature detector and a first flow rate adjustment valve, wherein the first flow rate adjustment valve adjusts a flow rate of cooling water that is guided to the heater; The ring passage is provided with a second temperature detector and a second flow rate adjusting valve on the upstream side of the heater, and the second flow rate adjusting valve adjusts a flow rate of the cooling water that is guided to the heater.

In the water-making system according to the second embodiment, it is preferable to further include a central cooler that cools the cooling water flowing through the first cooling water passage and the second cooling water passage.

Further, in the water generating system according to the second embodiment, it is preferable to further include a control device that is connected to the first temperature detector and the second temperature check. a measuring device, the first flow rate adjusting valve, and the second flow rate adjusting valve; wherein the control device individually controls the amount of cooling water heat from the first circulation passage and the second circulation passage to the heater to be lower than a prescribed heat At the same time, the first flow rate adjustment valve and the second flow rate adjustment valve are simultaneously opened to guide the cooling water to the heater.

Further, in the water generating system according to the second embodiment, preferably, the control device is configured such that the flow rate adjusting valve of any one of the first flow rate adjusting valve and the second flow rate adjusting valve is fully opened, and the other flow rate is adjusted. The opening amount of the valve is adjusted so that the amount of heat of the cooling water individually guided to the heater from the first circulation passage and the second circulation passage is determined as the predetermined amount of heat.

According to the water generating system of the present invention, even when the temperature of the jacket cooling water discharged from the internal combustion engine (diesel engine) is lowered, the amount of heat for obtaining a sufficient amount of fresh water can be secured.

1,1 ' ‧‧‧Water system

2‧‧‧Water generator

3‧‧‧heater

7‧‧‧1st cooling water channel

8‧‧‧2nd cooling water channel

9‧‧‧1st circulation channel

10‧‧‧2nd circulation channel

30‧‧‧Control device

Fig. 1 is a schematic configuration diagram of a fresh water generating system according to a first embodiment of the present invention.

Fig. 2 is a flow chart showing a method of producing water in the water generating system of the first embodiment.

Fig. 3 is a flow chart showing a method of producing water in the water generating system of the first embodiment.

Fig. 4 is a schematic configuration diagram of a modification of the fresh water generating system according to the first embodiment of the present invention.

Fig. 5 is a flow chart showing the method of water production of the water making system of Fig. 4.

Fig. 6 is a flow chart showing the water making method of the water generating system of Fig. 4.

Fig. 7 is a schematic configuration diagram of a fresh water generating system according to a second embodiment of the present invention.

Fig. 8 is a flow chart showing a method of producing water in the water generating system of the second embodiment.

Fig. 9 is a flow chart showing a method of producing water in the water generating system of the second embodiment.

Fig. 10 is a schematic configuration diagram of a modification of the fresh water generating system according to the second embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The water-making system of the present invention is applicable to the waste heat of the internal combustion engine (diesel engine) from the host that generates the propulsion of the ship, and is transmitted to the seawater filled in the water-making device, and the water vapor is cooled by evaporating the seawater. ‧ Condensing water-making device for desalination.

Fig. 1 is a schematic configuration diagram of a fresh water generating system according to a first embodiment of the present invention. The fresh water generating system 1 of the first embodiment includes a fresh water generating device 2 having a heater 3 for heating seawater, and is provided with air cooling for cooling the combustion air supplied from the supercharger 5 to the diesel engine 4. The first cooling water passage 7 for circulating cooling water (scaven air cooling water), the second cooling water passage 8 for circulating cooling water (jacket cooling water) of the diesel engine 4, and the first cooling water passage 7 from the aforementioned first cooling water passage 7 After the split, the first circulation passage 9 that has flowed back into the first cooling water passage 7 and the second circulation passage 10 that is branched from the second cooling water passage 8 and then recirculated to the second cooling water passage 8 are returned.

The fresh water generator 2 is not particularly limited as long as it is heated by the heater 3 to generate water vapor and then separated by gas and liquid, and the fresh water is produced by the water vapor separated by the condensed gas and liquid. For example, a flashing type water generating device (for example, JP-A-2009-90228), a plate type water generating device (for example, JP-A-9-299927), and a multi-tube type water generating device (For example, JP-A-2013-166141), a membrane-distilling type water-making apparatus (for example, JP-A-6-7644). The heater 3 is, for example, a heat exchanger, and the seawater extracted from the sea is heated by the heat exchange of the waste heat discharged from the diesel engine 4 as a heat source in the heat exchanger to evaporate.

The diesel engine 4 system uses at least one of fuel oil and fuel gas as a main fuel, and shuts off the internal combustion engine in which the main fuel and the scavenging air are combusted together.

The supercharger 5 includes a turbine 50 driven by exhaust gas discharged from the main engine fuel by the diesel engine 4, and a compressor 51 that compresses the outside air by the rotary power of the turbine 50, and compresses the outside air as combustion. Air (scaven air) is supplied to the diesel engine 4.

The air cooler 6 is configured to cool the scavenging air supplied from the supercharger 5 to the diesel engine 4. The scavenging air is cooled and supplied to the diesel engine 4 by the air cooler 6 for the purpose of increasing the air density (weight per unit volume) by heat insulation compression (about 50 ° C to 200 ° C).

The first cooling water passage 7 is circulated and supplied to the piping of the scavenging air cooling water of the air cooler 6, and is connected to the circulation pump 11. The scavenging air cooling water circulates the first cooling water passage 7 by the circulation pump 11. The first cooling water passage 7 is provided with a flow rate adjusting valve 12 and a cooler 13. The flow rate adjustment valve 12 adjusts the flow rate of the scavenging air cooling water supplied from the first cooling water passage 7 to the air cooler 6. The flow rate adjustment valve 12 may be provided with a flow meter. The cooler 13 is a scavenging air in the cooling air cooler 6 and a scavenging air cooling water that becomes high in temperature. The cooler 13 is, for example, a heat exchanger, and sends cooling water from a central cooler (not shown). In the cooler 13, heat exchange is performed between the scavenging air cooling water and the cooling water to cool the scavenging air cooling water. The flow regulating valve 12 is connected to the control device 30 and is controlled by the control device 3 0, the switching state of the flow regulating valve 12 is controlled. Further, the first cooling water passage 7 is connected to the first circulation passage 9 which is branched from the first cooling water passage 7 and is returned to the first cooling water passage 7.

The first circulation passage 9 is configured to scavenge air in the cooling air cooler 6 and guide the scavenging air cooling water to a high temperature to the pipeline of the heater 3. The first circulation passage 9 is provided on the flow side of the heater 3, and the temperature detector 15, the flow rate adjustment valve 14, and the heat exchanger 16 are sequentially provided. The flow rate adjustment valve 14 adjusts the flow rate of the scavenging air cooling water (the scavenging air cooling water guided to the heater 3) that is branched from the first cooling water passage 7 to the first circulation passage 9. The flow rate adjustment valve 14 may be provided with a flow meter. The temperature detector 15 measures the temperature T _A of the scavenging air cooling water guided from the first cooling water passage 7 to the heater 3. The flow rate adjusting valve 14 and the temperature detector 15 are connected to the control device 30, and the control device 30 controls the switching state of the flow rate adjusting valve 14 and monitors the temperature detector 15.

The heat exchanger 16 is configured to heat or cool the scavenging air cooling water that is directed from the air cooler 6 to the heater 3 as needed. The heat exchanger 16 is configured to send a part of the jacket cooling water after cooling the diesel engine 4, and heat exchange between the scavenging air cooling water and the jacket cooling water is performed in the heat exchanger 16, and the scavenging air cooling water is adjusted. temperature. Between the heat exchanger 16 and the heater 3, a temperature detector 17 is connected, and the temperature detector 17 measures the temperature of the scavenging air cooling water which is adjusted by the heat exchanger 16 and guided to the heater 3. This temperature detector 17 is connected to the control unit 30 and monitored by the control unit 30.

Further, the first circulation passage 9 is provided on the flow side below the heater 3, and the temperature detector 18 and the flow rate adjustment valve 19 are provided in this order. The temperature detector 18 measures the temperature of the scavenging air cooling water discharged from the heater 3. The flow rate adjusting valve 19 adjusts the scavenging air cooling water that is returned from the first circulation passage 9 to the first cooling water passage 7 (the scavenging gas discharged from the heater 3) The flow of air cooling water). The flow rate adjustment valve 19 may be provided with a flow meter. The temperature detector 18 and the flow rate adjusting valve 19 are connected to the control device 30, and the control device 30 controls the switching state of the flow rate adjusting valve 19 and monitors the temperature detector 18.

The second cooling water passage 8 is configured to cyclically cool the jacketed cooling water pipeline of the diesel engine 4 and is connected to the circulation pump 20. The jacket cooling water circulates the second cooling water passage 8 by the circulation pump 20. The second cooling water passage 8 is provided with a flow rate adjusting valve 21 and a cooler 22. The flow rate adjustment valve 21 adjusts the flow rate of the jacket cooling water supplied from the second coolant channel 8 to the diesel engine 4. The flow rate adjustment valve 21 may be provided with a flow meter. The cooler 22 is a jacket cooling water that is discharged from the diesel engine 4 and becomes high in temperature. The cooler 22 is, for example, a heat exchanger, and sends cooling water from a central cooler (not shown). In the cooler 22, heat is exchanged between the jacketed cooling water and the cooling water to cool the jacket cooling water. The flow rate adjustment valve 21 is connected to the control device 30, and the control device 30 controls the switching state of the flow rate adjustment valve 21. Further, the second cooling water passage 8 is connected to the second circulation passage 10 which is branched from the second cooling water passage 8 and flows back to the second cooling water passage 8.

In the second circulation passage 10, the jacket cooling water which is heated by the cooling of the diesel engine 4 is guided to the piping of the heat exchanger 16. The second circulation passage 10 is provided on the flow side of the heater 16, and the temperature detector 24 and the flow rate adjustment valve 23 are provided in this order. The flow rate adjustment valve 23 adjusts the flow rate of the jacket cooling water (the jacket cooling water guided to the heat exchanger 16) branched from the second cooling water passage 8 to the second circulation passage 10. The flow rate adjustment valve 23 is provided with a flow meter 23A. The temperature detector 24 measures the temperature T _J of the jacket cooling water that is guided from the second cooling water passage 8 to the heat exchanger 16. The flow rate adjusting valve 23 and the temperature detector 24 are connected to the control device 30, and the control device 30 monitors the flow rate of the flow meter 23A and the flow rate adjusting valve 23 and monitors the temperature detector 24.

Further, the second circulation passage 10 is provided on the flow side below the heat exchanger 16, and the temperature detector 25 and the flow rate adjustment valve 26 are provided in this order. The temperature detector 25 measures the temperature of the jacket cooling water discharged from the heat exchanger 16. The flow rate adjustment valve 26 adjusts the flow rate of the jacket cooling water (the jacket cooling water discharged from the heat exchanger 16) that flows back from the second circulation passage 10 to the second cooling water passage 8. The flow rate adjustment valve 26 may be provided with a flow meter. The temperature detector 25 and the flow rate adjusting valve 26 are connected to the control device 30, and the control device 30 controls the switching state of the flow rate adjusting valve 26 and monitors the temperature detector 25.

Next, a water producing method of the fresh water generating system 1 of the first embodiment will be described with reference to Figs. 2 and 3 . In the steps shown in FIGS. 2 and 3, the control device 30 operates by reading a computer program stored in the memory (not shown) and executing it. In addition, in Fig. 2 and Fig. 3, the scavenging air cooling water is Q, and the jacket cooling water is represented by J.

First, in ST1, based on the detected temperature of the temperature detector 15 and the temperature detector 24, the control device 30 flows the temperature T _A of the scavenging air cooling water of the first circulation passage 9 from the first cooling water passage 7 and the second. The temperature T _J of the jacket cooling water flowing through the cooling water passage 8 through the second circulation passage 10 is within the temperature range in which the water can be produced. Here, when the temperature T _{A of the} scavenging air cooling water is lowered, there is a problem that the seawater cannot be heated by the heater 3 to the evaporation temperature. Further, sea water, because of scale components such as calcium ions mixed Ca ²⁺ ions or the sulfate SO ₄ ^2-, upon evaporation of water under high temperature conditions, such as a scale for the analysis of the surface of the heater 3, heat exchange efficiency is Poor question. On the other hand, the temperature of the jacket cooling water T _J is a necessary temperature range in which the stability of the diesel engine 4 must be maintained. Therefore, it is preferable that the temperature T _A of the scavenging air cooling water and the temperature T _J of the jacket cooling water are such that the operation of the apparatus is unobstructed and the scale component does not precipitate out of the surface of the heater 3 to evaporate the seawater. Therefore, the water temperature can be determined. The water temperature range can be set, for example, from 60 ° C to 95 ° C.

In ST1, since the temperature T _A of the scavenging air cooling water and the temperature T _{J of the} jacket cooling water are not within the water curable temperature range, the temperature of the cooling water must be raised or lowered, so that the control device 30 is connected to ST2. The amount of cooling water individually sent from the cooler 13 and the cooler 22 of the central cooler is adjusted, and the flow control valve 12 and the flow control valve 21 are adjusted, and the cooling water flowing through the first cooling water passage 7 and the second cooling water passage 8 is adjusted. The amount of cooling water in which the first cooling water passage 7 and the second cooling water passage 8 are circulated (that is, supplied to the first circulation passage 9 and the second circulation passage 10) is adjusted. Then, return to ST1.

In ST1, when the temperature T _{A of the} scavenging air cooling water and the temperature T _{J of the} jacket cooling water are all within the water curable temperature range, the process proceeds to ST3, and the control device 30 is opened to open the flow control valve 14 from the first cycle. Channel 9 is directed to heater 3 to begin water production. Next, in the control device 30, in ST4, based on the detected temperature of the temperature detector 15, the temperature T _A of the scavenging air cooling water flowing through the first circulation passage 9 is the set temperature or not. Here, the set temperature means an optimum temperature range for efficiently operating the fresh water generator 2, for example, 75 to 85 °C.

In ST4, when the temperature T _A of the scavenging air cooling water is the set temperature, the process proceeds to ST5, and the control device 30 continues to supply the scavenging air cooling water of the set temperature to the heater 3 to perform the water generation.

On the other hand, the temperature T _A of the scavenging air cooling water in ST4 is not the set temperature, and when it is lower than the set temperature, the process proceeds to ST7 because the scavenging air cooling water supplied to the heater 3 needs to be raised to the set temperature, and is controlled by The device 30 determines whether the temperature T _J of the jacket cooling water through which the second cooling water passage 8 flows is higher than the set temperature based on the detected temperature of the temperature detector 24.

In ST7, when the temperature T _J of the jacket cooling water through which the second cooling water passage 8 flows is higher than the set temperature, the control device 30 opens only the amount specified by the flow rate adjusting valve 23 at the subsequent ST8, from the second circulation passage. 10 guides the jacket cooling water to the heat exchanger 16, in which the scavenging air cooling water supplied to the heater 3 is heated by the jacket cooling water. Next, the control device 30 determines, based on the detected temperature of the temperature detector 17, the temperature of the scavenging air cooling water guided to the heater 3 after the temperature adjustment of the heat exchanger 16 is the set temperature or not, in the subsequent step ST9. In the case of the temperature, the water is produced in a state in which the amount specified by the flow rate adjusting valve 23 is opened (ST10).

Further, in ST9, when the temperature of the scavenging air cooling water guided to the heater 3 after the temperature adjustment of the heat exchanger 16 is lower than the set temperature, the control device 30 proceeds to ST11, and determines the flow rate adjustment based on the detection amount of the flow meter 23A. When the valve 23 is fully open (100% open state) or not, the flow regulating valve 23 is not fully opened, the process proceeds to ST12, and the flow regulating valve 23 is adjusted to increase the jacket cooling from the second circulation passage 10 to the heat exchanger 16. The flow rate of water, in the heat exchanger 16, further heats the scavenging air cooling water supplied to the heater 3. Then, when the temperature of the scavenging air cooling water guided to the heater 3 after the temperature adjustment of the heat exchanger 16 is changed to the set temperature (YES in ST9), the amount specified by the flow rate adjusting valve 23 is further turned on. Water production (ST10). On the other hand, in ST11, when the flow rate adjustment valve 23 is fully open (100% open state), the process proceeds to ST13, and the control device 30 reduces the amount of cooling water that is individually sent from the cooler 13 and/or the cooler 22 of the central cooler. The amount of the first cooling water passage 7 and/or the second cooling water passage 8 is circulated (also That is, the temperature of the cooling water supplied to the first circulation passage 9 and/or the second circulation passage 10) rises and returns to ST1.

Returning to ST7, when the temperature T _J of the trap cooling water flowing through the second cooling water passage 8 is lower than the set temperature, the process proceeds to ST14, and the control device 30 does not open the flow regulating valve 23 to reduce the cooler 13 and/or by the central cooler. The amount of cooling water sent by the cooler 22 alone is such that the first cooling water passage 7 and/or the second cooling water passage 8 are circulated (that is, supplied to the first circulation passage 9 and/or the second circulation passage 10). The temperature of the water rises and returns to ST1.

Returning to ST6, when the temperature T _{A of the} scavenging air cooling water is higher than the set temperature, since it is necessary to lower the temperature of the scavenging air cooling water supplied to the heater 3 to the set temperature, the process proceeds to ST15, and the control device 30 detects the temperature based on the temperature. The detected temperature of the device 24 determines whether the temperature T _{J of the} trap cooling water flowing through the second cooling water passage 8 is lower than the set temperature or not.

When ST15, the cooling water of lined 8 of the second flow passage of the cooling water temperature is set lower than the temperature T _J, into the ST16, the control device 30, a predetermined amount of the flow rate adjusting valve 23 is only opened, the second circulation passage 10 from the guide jacket The cooling water is supplied to the heat exchanger 16, and the scavenging air cooling water supplied to the heater 3 is cooled by the jacket cooling water. Thereafter, the control device 30 determines, based on the detected temperature of the temperature detector 17, the temperature T1 of the scavenging air cooling water guided to the heater 3 after the temperature adjustment of the heat exchanger 16 is set to the set temperature, at the set temperature. At the time of the opening, the amount of water is increased by the amount specified by the flow rate adjusting valve 23 (ST18).

Further, in ST17, when the temperature T1 of the scavenging air cooling water guided to the heater 3 after the temperature adjustment of the heat exchanger 16 is higher than the set temperature, the process proceeds to ST19, and the control device 30 determines the flow rate based on the detected amount of the flow meter 23A. Adjustment valve 23 is fully open (1 When the flow regulating valve 23 is not fully open, the flow regulating valve 23 is adjusted in ST20 to increase the flow rate of the jacket cooling water guided from the second circulation passage 10 to the heat exchanger 16, the heat exchanger. In 16, the scavenging air cooling water supplied to the heater 3 is further cooled. Then, when the temperature of the scavenging air cooling water guided to the heater 3 after the temperature adjustment of the heat exchanger 16 is changed to the set temperature (YES in ST17), the amount specified by the flow rate adjusting valve 23 is further turned on. Water production (ST18). On the other hand, in ST19, when the flow rate adjustment valve 23 is fully open (100% open state), the process proceeds to ST21, and the control device 30 increases the amount of cooling water that is individually sent from the cooler 13 of the central cooler and/or the cooler 22. The amount of cooling water flowing through the first cooling water passage 7 and/or the second cooling water passage 8 (that is, supplied to the first circulation passage 9 and/or the second circulation passage 10) is lowered, and the temperature is returned to ST1.

Back ST15, the cooling water passage 8 to the second of the jacket cooling water temperature T _J is set higher than the temperature control device 30, does not open the flow regulating valve 23, in the subsequent ST22, the intercooler increasing the cooler 13 and/or the amount of cooling water sent by the cooler 22 individually, so that the first cooling water passage 7 and/or the second cooling water passage 8 are circulated (that is, supplied to the first circulation passage 9 and/or the second circulation passage 10). The temperature of the cooling water is lowered and returns to ST1.

According to the fresh water generating system 1 of the first embodiment, the scavenging cooling water flowing through the first cooling water passage 7 is guided from the first circulation passage 9 to the heater 3 and used for water generation in the fresh water generator 2, and is scavenged in the scavenging air. The water is guided to the heat exchanger 16 provided on the way to the heater 3. In the heat exchanger 16, the temperature of the scavenging cooling water is adjusted by the jacket cooling water. Thereby, even if the temperature of the scavenging cooling water discharged from the air cooler 6 rises or falls, it is guided to the heater 3. The temperature of the scavenging cooling water can be adjusted to an appropriate temperature for water generation in the fresh water generator 2, and the scavenging air cooling water of a stable temperature (heat) can be supplied to the fresh water generator 2 (heater 3), thereby ensuring The fresh water unit 2 is used to obtain a sufficient amount of fresh water.

Although the first embodiment of the present invention has been described above, the first embodiment of the present invention is not limited to the above embodiment. For example, in the embodiment of Fig. 1, the scavenging air cooling water of the first cooling water passage 7 which becomes the high temperature by the scavenging air in the cooling air cooler 6 is guided to the heater 3 to heat the seawater, as shown in Fig. 4. As shown in the figure, the jacket cooling water of the second cooling water passage 8 which becomes high temperature by the cooling of the diesel engine 4 is guided to the heater 3, and the seawater may be heated. At this time, the scavenging air in the air cooler 6 is cooled to become the scavenging air cooling water of the first cooling water passage 7 at a high temperature for guiding the temperature adjustment of the jacket cooling water to the heater 3.

Fig. 4 is a schematic view showing a schematic diagram of a fresh water system 1 for desalinating seawater by jacket cooling water. The basic configuration of the embodiment of Fig. 4 is the same as the configuration of the embodiment of Fig. 1, and the corresponding configurations are denoted by the same reference numerals, and the description thereof will be omitted.

The fresh water generating system 1 of the embodiment of Fig. 4 is provided with a fresh water generating device 2 having a heater 3 for heating seawater, and an air cooler 6 for cooling the combustion air supplied from the supercharger 5 to the diesel engine 4. The first cooling water passage 7 of the circulating cooling water (scaven air cooling water) circulates and cools the second cooling water passage 8 of the cooling water (jacket cooling water) of the diesel engine 4, and is diverted from the first cooling water passage 7 The first circulation passage 9 of the first cooling water passage 7 is recirculated, and is branched from the second cooling water passage 8 and then recirculated to the second circulation passage 10 of the second cooling water passage 8.

The embodiment of FIG. 4 differs from the embodiment of FIG. 1 in that the second circulation passage 10 is branched and recirculated with respect to the second cooling water passage 8 of the circulating jacket cooling water. The heater 3 is connected to the heater 3, and the heat exchanger 16 is disposed on the flow side of the heater 3 of the second circulation passage 10. The heat exchanger 16 is configured to send out a portion of the scavenging air cooling water after the scavenging air in the air cooler 6 is turned into a high temperature, and heat is exchanged between the jacket cooling water and the scavenging air cooling water in the heat exchanger 16. Exchange and adjust the temperature of the jacket cooling water. Further, a temperature detector 27 is connected between the heat exchanger 16 and the heater 3, and the temperature of the jacket cooling water adjusted by the temperature of the heat exchanger 16 is measured by the temperature detector 27. This temperature detector 27 is connected to the control unit 30 and monitored by the control unit 30. Further, the flow rate adjustment valve 14 is provided with a flow meter 14A, and the flow rate control valve 14 is monitored by the control device 30 to control the switching state of the flow rate adjustment valve 14.

Next, a water producing method of the fresh water generating system 1 of the present embodiment will be described with reference to Figs. 5 and 6 . In each of the steps shown in FIGS. 5 and 6, the control device 30 operates by reading a computer program stored in the memory (not shown) and executing it. In addition, in Fig. 5 and Fig. 6, the scavenging air cooling water is Q and the jacket cooling water is represented by J.

First, in the control device 30, based on the detected temperature of the temperature detector 15 and the temperature detector 24, the temperature T _A of the scavenging air cooling water flowing through the first circulation passage 9 from the first cooling water passage 7 and The temperature T _J of the jacket cooling water flowing through the second circulation passage 10 in the second circulation passage 10 is within the temperature range in which the water can be produced.

In ST1, when the temperature T _{A of the} scavenging air cooling water and the temperature T _J of the jacket cooling water are not within the water curable temperature range, the temperature of the cooling water must rise or fall, and enter the ST2, and the control device 30 The amount of cooling water separately sent from the cooler 13 and the cooler 22 of the central cooler is adjusted, and the flow control valve 12 and the flow control valve 21 are adjusted to adjust the cooling of the first cooling water passage 7 and the second cooling water passage 8 The amount of water is adjusted to regulate the temperature of the cooling water flowing through the first cooling water passage 7 and the second cooling water passage 8 (that is, supplied to the first circulation passage 9 and the second circulation passage 10). Then, go back to ST1.

In ST1, when the temperature T _{A of the} scavenging air cooling water and the temperature T _{J of the} jacket cooling water are all within the water curable temperature range, the process proceeds to ST3, and the control device 30 is opened to open the flow control valve 23 from the second circulation passage. 10 Guide the jacket cooling water to the heater 3 to start making water. Next, in the control device 30, in ST4, based on the detected temperature of the temperature detector 24, it is determined whether the temperature T _J of the jacket cooling water flowing through the second circulation passage 10 is the set temperature or not.

In ST4, if the temperature T _J of the jacket cooling water is the set temperature, the process proceeds to ST5, and the control device 30 continues to supply the jacket cooling water of the set temperature to the heater 3 for water production.

On the other hand, the temperature T _J of the jacket cooling water in ST4 is not the set temperature, and when it is lower than the set temperature, it enters ST7 because the temperature of the jacket cooling water supplied to the heater 3 needs to rise to the set temperature, and is controlled by The device 30 determines whether the temperature T _A of the scavenging air cooling water flowing through the first cooling water passage 7 is higher than the set temperature based on the detected temperature of the temperature detector 15.

In ST7, when the temperature T _A of the scavenging air cooling water through which the first cooling water passage 7 flows is higher than the set temperature, the control device 30 opens only the amount specified by the flow rate adjusting valve 14 in the subsequent ST8, from the first cycle. The passage 9 guides the scavenging air cooling water to the heat exchanger 16, in which the jacket cooling water supplied to the heater 3 is heated by the scavenging air cooling water. Next, the control device 30 determines, based on the detected temperature of the temperature detector 27, that the temperature T2 of the jacket cooling water guided to the heater 3 after the temperature adjustment of the heat exchanger 16 is set to the set temperature or not, in the subsequent step ST9. In the case of temperature, the amount specified by the flow regulating valve 14 is turned on to make water (ST10).

Further, in ST9, when the temperature of the jacket cooling water of the heater 3 adjusted to the temperature of the heat exchanger 16 is lower than the set temperature, the control device 30 proceeds to ST11, and determines the flow rate adjustment based on the detection amount of the flow meter 14A. When the valve 14 is fully open (100% open state) or not, the flow regulating valve 14 is not fully opened, and the flow regulating valve 14 is adjusted to increase the scavenging air guided from the first circulation passage 9 to the heat exchanger 16 in ST12. The flow rate of the cooling water is such that, in the heat exchanger 16, the jacket cooling water supplied to the heater 3 is further heated. Then, when the temperature of the jacket cooling water of the heater 3 whose temperature has been adjusted by the heat exchanger 16 is changed to the set temperature (YES in ST9), the state of the flow regulating valve 14 is further turned on. Water (ST10). On the other hand, in ST11, when the flow rate adjustment valve 14 is fully open (100% open state), the process proceeds to ST13, and the control device 30 reduces the amount of cooling water that is separately sent from the cooler 13 of the central cooler and/or the cooler 22. The amount of cooling water flowing through the first cooling water passage 7 and/or the second cooling water passage 8 (that is, supplied to the first circulation passage 9 and/or the second circulation passage 10) is increased, and the flow returns to ST1.

Returning to ST7, when the temperature T _A of the scavenging air cooling water flowing through the first cooling water passage 7 is lower than the set temperature, the process proceeds to ST14, the control device 30 does not open the flow regulating valve 14, and the cooler 13 of the central cooler is reduced. And/or the amount of cooling water sent by the cooler 22 individually, so that the first cooling water passage 7 and/or the second cooling water passage 8 are circulated (that is, supplied to the first circulation passage 9 and/or the second circulation passage 10). The temperature of the cooling water rises and returns to ST1.

Returning to ST6, when the temperature T _{J of the} jacket cooling water is higher than the set temperature, since the temperature of the jacket cooling water supplied to the heater 3 must be lowered to the set temperature, the process proceeds to ST1 5, and the control device 30 is based on the temperature detector. The detected temperature of 15 determines whether the temperature T _A of the scavenging air cooling water flowing through the first cooling water passage 7 is lower than the set temperature or not.

In ST15, when the temperature T _A of the scavenging air cooling water flowing through the first cooling water passage 7 is lower than the set temperature, the process proceeds to ST16, and the control device 30 opens only the amount specified by the flow rate adjusting valve 14 from the first circulation passage 9 The scavenging air cooling water is guided to the heat exchanger 16, and the jacket cooling water supplied to the heater 3 is cooled by the scavenging air cooling water. Thereafter, the control device 30 determines, based on the detected temperature of the temperature detector 27, the temperature of the jacket cooling water guided to the heater 3 after the temperature adjustment of the heat exchanger 16 is set to a set temperature, and at the set temperature, The water is produced in a state in which the amount specified by the flow rate adjusting valve 14 is opened (ST18).

Further, in ST17, when the temperature of the jacket cooling water guided to the heater 3 after the temperature adjustment of the heat exchanger 16 is higher than the set temperature, the process proceeds to ST19, and the control device 30 determines the flow rate adjusting valve based on the detected amount of the flow meter 14A. 14 is fully open (100% open state) or not, when the flow regulating valve 14 is not fully open, the flow regulating valve 14 is adjusted in ST20 to increase the scavenging air cooling water guided from the first circulation passage 9 to the heat exchanger 16. In the flow rate, in the heat exchanger 16, the jacket cooling water supplied to the heater 3 is further cooled. Then, when the temperature of the jacket cooling water guided to the heater 3 after the temperature adjustment of the heat exchanger 16 is changed to the set temperature (YES at ST17), the state of the flow regulating valve 14 is further turned on to make water. (ST18). On the other hand, in ST19, when the flow rate adjustment valve 14 is fully open (100% open state), the process proceeds to ST21, and the control device 30 increases the amount of cooling water that is individually sent from the cooler 13 and/or the cooler 22 of the central cooler. The first cooling water passage 7 and/or the second cooling water passage 8 are circulated (that is, supplied to the first circulation passage) The temperature of the cooling water of the track 9 and/or the second circulation passage 10) is lowered to return to ST1.

Returning to ST15, when the temperature T _{A of the} first cooling water passage 7 flowing through the scavenging air cooling water is higher than the set temperature, the control device 30 does not open the flow regulating valve 14, and in the subsequent ST22, the cooler of the central cooler is added. 13 and/or the amount of cooling water sent by the cooler 22 individually, so that the first cooling water passage 7 and/or the second cooling water passage 8 are circulated (that is, supplied to the first circulation passage 9 and/or the second circulation passage 10). The temperature of the cooling water is lowered and returns to ST1.

In the water-making system 1 of this embodiment, the jacket cooling water flowing through the second cooling water passage 8 is guided from the second circulation passage 10 to the heater 3 and used for water generation in the fresh water generator 2, and is cooled in the jacket. The water is guided to the heat exchanger 16 provided on the way to the heater 3. In the heat exchanger 16, the temperature of the jacket cooling water is adjusted by scavenging air cooling water. Thereby, even if the temperature of the jacket cooling water discharged from the diesel engine 4 rises or falls, the temperature of the jacket cooling water guided to the heater 3 can be adjusted to an appropriate temperature for water generation in the fresh water generator 2, The heat in the fresh water generator 2 for obtaining a sufficient amount of fresh water can be ensured. The temperature of the jacket cooling water is accompanied by a decrease in the efficiency of the diesel engine 4, so that it is difficult to use the jacket cooling water alone for the water making of the fresh water generator 2, and according to this embodiment. The water system 1, the jacketed cooling water of the stable temperature (heat) can be supplied to the fresh water generator 2 (heater 3).

Next, Fig. 7 is a schematic configuration diagram of a water generating system 1 ' according to a second embodiment of the present invention. The fresh water generating system 1 ' of the second embodiment is provided with a fresh water generating device 2 having a heater 3 for heating seawater, and an air cooler 6 for cooling the combustion air supplied from the supercharger 5 to the diesel engine 4. The first cooling water passage 7 of the circulating cooling water (scaven air cooling water) circulates and cools the second cooling water passage 8 of the cooling water (jacket cooling water) of the diesel engine 4, and is diverted from the first cooling water passage 7 The first circulation passage 9 of the first cooling water passage 7 is recirculated, and is branched from the second cooling water passage 8 and then recirculated to the second circulation passage 10 of the second cooling water passage 8.

The fresh water generating system 1 of the first embodiment is a scavenging air cooling water of the first cooling water passage 7 which is heated to a high temperature by the scavenging air in the air cooler 6, or is cooled by the diesel engine 4. Any one of the jacket cooling waters of the second cooling water passage 8 that becomes the high temperature is guided to the heater 3 to heat the seawater. On the other hand, the patterns for the second embodiment of the water producing system 1 'system, the scavenging air into the cooling air cooler 6 becomes a high temperature of the first cooling water passage 7 of the scavenging air or water cooled diesel engines by The jacket cooling water of the second cooling water passage 8 which is cooled to become high temperature can be guided to the heater 3 at the same time, and can be turned into any of the scavenging cooling water and the jacket cooling water, or scavenging gas, depending on the situation. Both the cooling water and the jacketed cooling water heat the seawater.

In the water making system 1 ' of the second embodiment, the water generating device 2, the diesel engine 4, the supercharger 5, the air cooler 6, the first cooling water passage 7, and the second cooling water passage 8 are configured as described above. The configuration of the first embodiment is the same, and the corresponding components are denoted by the same reference numerals, and the detailed description is omitted. In addition, constituting the configuration corresponding to the configuration of the first embodiment described above will be denoted by the same reference numerals.

In the first circulation passage 9 system, the cooling air cooler 6 scavenges the air and guides the high temperature sweeping air conditioner cooling water to the pipeline of the heater 3. The first circulation passage 9 is provided on the flow side of the heater 3, and the temperature detector 15 and the flow rate adjustment valve 14 are sequentially provided. The flow rate adjustment valve 14 adjusts the flow rate of the scavenging air cooling water (the scavenging air cooling water guided to the heater 3) that is branched from the first cooling water passage 7 to the first circulation passage 9. Flow regulating valve 14 series, A flow meter 14A can also be provided. The temperature detector 15 is for measuring the temperature of the scavenging air cooling water guided to the heater 3. The flow rate adjusting valve 14 and the temperature detector 15 are connected to the control device 30, and the flow meter 14A is monitored by the control device 30 to control the switching state of the flow rate adjusting valve 14 and monitor the temperature detector 15.

Further, the first circulation passage 9 is provided on the flow side below the heater 3, and the temperature detector 18 and the flow rate adjustment valve 19 are provided in this order. The temperature detector 18 measures the temperature of the scavenging air cooling water discharged from the heater 3. The flow rate adjustment valve 19 adjusts the flow rate of the scavenging air cooling water (the scavenging air cooling water discharged from the heater 3) that is returned from the first circulation passage 9 to the first cooling water passage 7. The flow rate adjustment valve 19 may be provided with a flow meter. The temperature detector 18 and the flow rate adjusting valve 19 are connected to the control device 30, and the control device 30 controls the switching state of the flow rate adjusting valve 19 and monitors the temperature detector 18.

In the second circulation passage 10, the jacket cooling water which is heated by the cooling of the diesel engine 4 is guided to the piping of the heater 3. The second circulation passage 10 is provided on the flow side of the heater 16, and the temperature detector 24 and the flow rate adjustment valve 23 are provided in this order. The flow rate adjustment valve 23 adjusts the flow rate of the jacket cooling water (the jacket cooling water guided to the heater 3) that is branched from the second cooling water passage 8 to the second circulation passage 10. The flow rate adjustment valve 23 is provided with a flow meter 23A. A temperature detector 24 is provided for measuring the temperature of the jacket cooling water that is directed to the heater 3. The flow rate adjusting valve 23 and the temperature detector 24 are connected to the control device 30, and the flow meter 23A is monitored by the control device 30 to control the switching state of the flow rate adjusting valve 23 and monitor the temperature detector 24.

Further, the second circulation passage 10 is provided with a temperature detector 25 and a flow rate adjustment valve 26 in this order on the flow side below the heater 3. Temperature detector 25, measuring from the heater 3 The temperature of the jacket cooling water is discharged. The flow rate adjusting valve 26 adjusts the flow rate of the jacket cooling water (the jacket cooling water discharged from the heater 3) that flows back from the second circulation passage 10 to the second cooling water passage 8. The flow rate adjustment valve 26 may be provided with a flow meter. The temperature detector 25 and the flow rate adjusting valve 26 are connected to the control device 30, and the control device 30 controls the switching state of the flow rate adjusting valve 26 and monitors the temperature detector 25.

Next, a water-making method of the water-making system 1 ' of the second embodiment will be described with reference to Figs. 8 and 9 . In the steps shown in Figs. 8 and 9, the control device 30 operates by reading a computer program stored in the memory (not shown) and executing it. Further, in Figs. 8 and 9, the scavenging air cooling water is Q and the jacket cooling water is represented by J.

First, the control device 30 is configured to flow the temperature T _A of the scavenging air cooling water flowing from the first cooling water passage 7 to the first circulation passage 9 and from the second cooling water passage 8 to the second circulation passage 10 in ST1. The jacket cooling water temperature T _{J is} further based on the flow rate Q _J of the scavenging air cooling water that can be supplied from the first cooling water passage 7 to the first circulation passage 9 and from the second cooling water passage 8 to the second circulation passage 10 can supply the jacket cooling water flow Q _A calculated heat (T _J × Q _J and T _A × Q _A ), determine at least one of the scavenging air cooling water and the jacket cooling water, to meet the water production Whether the heat source of the device 2 must be heat or not.

In ST1, when the heat of at least one of the scavenging air cooling water and the jacket cooling water satisfies the heat necessary as the heat source of the fresh water generating device 2, the process proceeds to ST2, and the control device 30 confirms the scavenging air cooling water and the jacket. The heat of either of the cooling waters satisfies the heat necessary as the heat source of the fresh water generator 2. When the heat of the scavenging air cooling water is necessary to satisfy the heat source of the water generating device 2, the process proceeds to ST3, the control device 30, the flow rate control valve 14 is opened, and the scavenging cooling water is guided from the first circulation passage 9 to the heater 3. Make water. Next, in the control devices 30 and ST4, based on the detected temperature of the temperature detector 15, it is determined whether or not the temperature T _A of the scavenging air cooling water flowing through the first circulation passage 9 is the set temperature or not.

In ST4, when the temperature T _A of the scavenging air cooling water is the set temperature, the process proceeds to ST5, and the control device 30 continues to supply the scavenging air cooling water of the set temperature to the heater 3 for water production. On the other hand, in ST4, when the temperature T _{A of the} scavenging air cooling water is not the set temperature, since it is necessary to raise or lower the temperature of the scavenging air cooling water to the set temperature, the process proceeds to ST6, and the control device 30 adjusts the central cooling. The amount of cooling water sent from the cooler 13 of the device is adjusted, and the flow control valve 12 is adjusted to adjust the amount of scavenging air cooling water flowing through the first cooling water passage 7, and the first cooling water passage 7 is adjusted to flow (that is, supplied to the first one). The temperature of the scavenging air cooling water of the circulation passage 9). Then, return to ST1.

On the other hand, in ST2, when the heat of the jacket cooling water satisfies the heat necessary as the heat source of the fresh water generator 2, the process proceeds to ST7, the control device 30, the flow control valve 23 is opened, and the jacket cooling water is guided from the second circulation passage 10. The heater 3 starts to build water. Next, in the control devices 30 and ST8, based on the detected temperature of the temperature detector 24, the temperature T _J of the jacket cooling water flowing through the second circulation passage 10 is set to a set temperature or not.

In ST8, if the temperature T _J of the jacket cooling water is the set temperature, the process proceeds to ST9, and the control device 30 continues to supply the jacketed cooling water of the set temperature to the heater 3 for water production. On the other hand, in ST8, when the temperature T _{J of the} jacket cooling water is not set to a temperature, since it is necessary to raise or lower the temperature of the jacket cooling water to the set temperature, the process proceeds to ST10, and the control device 30 is adjusted by the central cooler. The amount of cooling water sent from the cooler 22 is adjusted, the flow rate control valve 21 is adjusted, and the amount of jacket cooling water flowing through the second cooling water passage 8 is adjusted, and the second cooling water passage 8 is adjusted to flow (that is, supplied to the second circulation passage 10). The temperature of the jacket cooling water. Then, go back to ST1.

In addition, in ST1, when both the scavenging air cooling water and the jacket cooling water satisfy the heat necessary for the water generating device 2 as a heat source, the user initially sets the scavenging air cooling water and the jacket cooling water. The water is produced, and in ST2, for example, it is determined based on whether or not the scavenging air cooling water is set in advance.

In addition, in ST1, when both the scavenging air cooling water and the jacket cooling water satisfy the heat necessary for the water generating device 2 as a heat source, the process proceeds to ST11, and the control device 30 is based on the temperature detector 15 and the temperature detector 24. The detected temperature is determined, the temperature T _A of the scavenging air cooling water flowing from the first cooling water passage 7 to the first circulation passage 9 and the jacket cooling water flowing from the second cooling water passage 8 to the second circulation passage 10 The temperature T _J is within the range of the water curable temperature.

When ST11, the scavenging air temperatures T _A and the cooling water jacket cooling water temperature T _J can be made within a neither water in the temperature range, because of the need to increase or decrease the temperature of cooling water, into the ST12, the control means 30, adjustment The amount of cooling water sent from the cooler 13 and the cooler 22 of the central cooler is adjusted, and the flow control valve 12 and the flow control valve 21 are adjusted to adjust the flow of the first cooling water passage 7 and the second cooling water passage 8 (that is, The temperature of the cooling water supplied to the first circulation passage 9 and/or the second circulation passage 10). Then, return to ST1.

In ST11, when the temperature T _{A of the} scavenging air cooling water and the temperature T _{J of the} jacket cooling water are all within the water curable temperature range, the process proceeds to ST13, and the control device 30 determines the scavenging air cooling water and the jacket cooling water. Which of the cooling water is used for the heat source of the main water generating device 2 or not. In this determination, the user initially sets the cooling water for the scavenging air cooling water and the jacket cooling water to be used as the heat source of the main fresh water generator 2, for example, based on whether or not the scavenging air cooling water is set in advance.

When the scavenging air cooling water is initially set for the heat source of the main fresh water generator 2, the process proceeds to ST14, the control device 30, and the full-open flow control valve 14 guides the scavenging air cooling water from the first circulation passage 9 to the heater 3 while Only the amount specified by the flow control valve 23 is turned on, and the jacket cooling water is guided from the second circulation passage 10 to the heater 3 to start water generation. Next, in the control device 30, in ST15, based on the temperature and flow rate of the scavenging air cooling water and the jacket cooling water guided to the heater 3, it is determined whether or not the heat necessary for the heat source of the fresh water generator 2 is satisfied. In ST15, when the temperature and flow rate of the scavenging air cooling water and the jacket cooling water guided to the heater 3 satisfy the heat necessary as the heat source of the fresh water generating device 2, the process proceeds to ST16, and the control device 30 opens the flow regulating valve 23. The water is produced in a predetermined amount.

On the other hand, in ST15, when the temperature and flow rate of the scavenging air cooling water and the jacket cooling water guided to the heater 3 do not satisfy the heat necessary for the heat source of the fresh water generator 2, the process proceeds to ST17, and the control device 30 is based on the flow rate. When the amount of detection of the flow rate adjustment valve 23 is determined to be fully open (100% open state) or not, and the flow rate adjustment valve 23 is not fully opened, the flow rate adjustment valve 23 is not fully opened, and the flow rate adjustment valve 23 is adjusted to increase the flow rate adjustment valve 23 from the second circulation passage 10 The flow of the jacket cooling water directed to the heater 3 rises to the heat of the jacket cooling water of the heater 3. Then, when the heat of the scavenging air cooling water and the jacket cooling water that is guided to the heater 3 is the heat necessary for the heat source of the fresh water generator 2 (NO in ST15), the flow regulating valve 23 is further opened. The state of the quantity is used for water production (ST16). On the other hand, in ST17, when the flow rate adjustment valve 23 is fully open (100% open state), the process proceeds to ST19, and the control device 30 increases the amount of cooling water that is individually sent from the cooler 13 and/or the cooler 22 of the central cooler. The amount of the first cooling water passage 7 and/or the second cooling water passage The temperature of the cooling water flowing through the passage 8 (that is, supplied to the first circulation passage 9 and/or the second circulation passage 10) is lowered, and returns to ST1.

Returning to ST13, when the jacket cooling water is initially used for the heat source of the main fresh water generator 2, ST13 becomes "NO" and enters ST20, the control device 30, the full open flow control valve 23, and the clamp is guided from the second circulation passage 10. The cooling water is supplied to the heater 3, and only the amount specified by the flow control valve 14 is turned on, and the scavenging air cooling water is guided from the first circulation passage 9 to the heater 3 to start water generation. Next, in the control device 30, in ST21, based on the temperature and flow rate of the scavenging air cooling water and the jacket cooling water guided to the heater 3, it is determined whether or not the heat necessary for the heat source of the fresh water generator 2 is satisfied. In ST21, when the heat of the scavenging air cooling water and the jacket cooling water guided to the heater 3 is required to satisfy the heat source of the water generating device 2, the control unit 30 is started to open the flow regulating valve 23. The water is produced in the state of the quantity.

On the other hand, in ST21, when the heat of the scavenging air cooling water and the jacket cooling water guided to the heater 3 does not satisfy the heat necessary as the heat source of the fresh water generator 2, the process proceeds to ST23, and the control device 30 is based on the flow meter 14A. The amount of detection determines whether the flow rate adjustment valve 14 is fully open (100% open state) or not, and the flow rate adjustment valve 14 is not fully open. In ST24, the flow rate adjustment valve 14 is adjusted to be guided from the first circulation passage 9 by increasing. The flow rate of the scavenging air cooling water to the heater 3 rises to the heat of the scavenging air cooling water of the heater 3. Then, when the heat of the scavenging air cooling water and the jacket cooling water that is guided to the heater 3 is the heat necessary for the heat source of the fresh water generator 2 (NO in ST21), the flow regulating valve 14 is further opened. The water is produced in the state of the prescribed amount (ST22). On the other hand, in ST23, when the flow rate adjustment valve 14 is fully open (100% open state), In ST25, the control device 30 increases the amount of cooling water separately sent from the cooler 13 and/or the cooler 22 of the central cooler to circulate the first cooling water passage 7 and/or the second cooling water passage 8 (ie, The temperature of the cooling water supplied to the first circulation passage 9 and/or the second circulation passage 10) is lowered, and the flow returns to ST1.

According to the fresh water generating system 1 ' of the second embodiment, the scavenging cooling water flowing through the first cooling water passage 7 is guided from the first circulation passage 9 to the heater 3, and the second cooling water passage 8 is passed through the jacket cooling. Water is guided from the second circulation passage 10 to the heater 3 and used for water generation in the fresh water generator 2. Thereby, even if the temperature of the scavenging cooling water discharged from the air cooler 6 rises or falls, and the temperature of the jacket cooling water discharged from the diesel engine 4 rises or falls, it is appropriately adjusted and guided to the heater 3. The temperature and flow rate of the scavenging cooling water and the jacket cooling water ensure the amount of fresh water used in the fresh water generator 2 to obtain a sufficient amount of fresh water. The temperature of the jacket cooling water is accompanied by a decrease in the efficiency of the diesel engine 4, and the temperature of the scavenging cooling water varies, and the jacket cooling water or the scavenging cooling water is separately used in the water generating device 2. water, it is difficult, the second embodiment of the water producing system patterns 1 ', the cooling water may be supplied to the heat stability of the fresh water apparatus 2 (heater 3).

The second embodiment of the present invention has been described above, but the present invention is not limited thereto, and various modifications can be made without departing from the concept of the invention.

For example, in the water making system 1 ' of the second embodiment, as shown in Fig. 10, a portion closer to the upstream side than the heater 3 of the first circulation passage 9 and a heater 3 of the second circulation passage 10 are provided. The side of the side is connected to the first connecting passage 28, and the portion on the downstream side of the heater 3 of the first circulation passage 9 is disposed, and the portion on the downstream side of the heater 3 of the second circulation passage 10 is connected to the second connecting passage 29 . Further, a flow rate adjusting valve 31 is provided in the first connecting passage 28, and a flow rate adjusting valve 32 may be provided in the second connecting passage 29. Each of the flow rate adjusting valves 31 and 32 is for adjusting the flow of the cooling water flowing from the first circulation passage 9 to the second circulation passage 10, the return flow, or the flow from the second circulation passage 10 to the first circulation passage 9 The control device 30 is connected, and the switching state of the flow rate adjusting valves 31, 32 is controlled by the control device 30.

When this embodiment of FIG. 10 of the water producing system of the patterns 1 'system, when using only fresh water scavenging air cooling water jacket cooling water and one in which the cooling water, e.g., using jacket cooling water is fresh water Generally, (the embodiment of FIG. 7), by closing the flow control valves 14, 19, the flow control valves 23, 26 are opened, and only the jacket cooling water is guided to the heater 3 via the second circulation passage 10, at this time, The flow control valves 31, 32 are opened, and the jacket cooling water flowing through the second circulation passage 10 is branched from the first connecting passage 28 to the first circulation passage 9, so that the jacket cooling water is also guided to the heating through the first circulation passage 9. Device 3, for making water. Then, the jacket cooling water of the first circulation passage 9 discharged from the heater 3 is returned to the first circulation passage 9 from the second connection passage 29, thereby returning all to the second cooling water passage 8. According to the water-making system 1 ' of the embodiment of Fig. 10, not only the second circulation passage 10 but also the jacket cooling water to the heater 3 is guided by the first unused circulation passage 9 by the heater 3 and the seawater. The heat exchange makes it possible to effectively utilize the heat transfer surface of the heater 3 (the portion for heat exchange) without any remaining. Thereby, even if the heat source of the fresh water generator 2 (scavenging air cooling water or jacket cooling water) is changed, regardless of this, the operating efficiency of the fresh water generator 2 can be maintained at an optimum state and is effective.

Further, in the water making system 1 ' of the embodiment of Fig. 10, when the scavenging air cooling water is used for the water making, usually (the embodiment of Fig. 7), the flow control valves 23, 26 are closed, and the water is turned on. The flow control valves 14, 19 guide the scavenging cooling water to the heater 3 only by the first circulation passage 9, and at this time, the flow control valves 31, 32 are opened, and the scavenging cooling water flowing through the first circulation passage 9 is opened. The first connecting passage 28 is branched to the second circulation passage 10, so that not only the first circulation passage 9, but also the scavenging cooling water can be guided to the heater 3 via the second circulation passage 10 to perform water generation.

1‧‧‧Water system

2‧‧‧Water generator

3‧‧‧heater

7‧‧‧1st cooling water channel

8‧‧‧2nd cooling water channel

9‧‧‧1st circulation channel

10‧‧‧2nd circulation channel

30‧‧‧Control device

Claims (10)

A water-making system which uses fresh water to be supplied from a marine engine mounted on a ship to produce fresh water from a seawater introduced into a ship, and is characterized in that it has a water-making device having a heater for heating sea water, and a first cooling water passage. The cooling water is circulated to the air cooler, the air cooler cools the combustion air supplied from the supercharger to the internal combustion engine; the second cooling water passage circulates the cooling water that cools the internal combustion engine; and the first circulation passage is cooled from the first The water passage is branched and returned to the first cooling water passage; and the second circulation passage is branched from the second cooling water passage and then recirculated to the second cooling water passage; and the cooling water or the circulation of the first circulation passage is circulated. The cooling water in the second circulation passage is guided to the heater and is heat-exchanged with seawater; and the circulation passage that guides the cooling water flowing to the heater in the first circulation passage and the second circulation passage is heated by the heating a heat exchanger is disposed on the flow side of the device, and the heat exchanger is configured to heat the cooling water flowing through the circulation passage and the cooling water flowing through the other circulation passages. ; The other system circulation passage, the valve to adjust the flow rate in the upstream side of the heat exchanger, the flow rate adjusting valve that adjusts the flow rate of the cooling water is guided to the heat exchanger. The water-making system according to the first aspect of the invention, further comprising a central cooler that cools the cooling water flowing through the first cooling water passage and the second cooling water passage. The water-producing system according to the first or second aspect of the invention, wherein the first circulation passage and the second circulation passage are configured to guide a circulation passage through which the cooling water of the heater flows. A first temperature detector and a second temperature detector are disposed on the flow side and the downstream side of the exchanger, and the other circulation channel is provided with a third temperature detector on the upstream side of the heat exchanger. The water-producing system according to claim 3, further comprising: a control device connected to the first temperature detector, the second temperature detector, the third temperature detector, and The flow regulating valve; and the control device, when the temperature of the cooling water guided to the heater is lower than the set temperature, measuring the temperature of the cooling water of the other circulation passage, and when the temperature is higher than the set temperature, opening the foregoing A flow regulating valve guides the cooling water to the aforementioned heat exchanger. The water-producing system according to the fourth aspect of the invention, wherein the control device measures the temperature of the cooling water of the other circulation passage when the temperature of the cooling water guided to the heater is higher than a set temperature, and When the temperature is lower than the set temperature, the flow rate adjusting valve is opened to guide the cooling water to the heat exchanger. The water-producing system according to the fourth aspect of the invention, wherein the control device measures the temperature of the cooling water of the other circulation passage when the temperature of the cooling water guided to the heater is higher than a set temperature, and When the temperature is higher than the set temperature, the central cooler is controlled to lower the temperature of the cooling water flowing through the first cooling water passage and the second cooling water passage. A water-making system which uses fresh water from an internal combustion engine mounted on a ship to produce fresh water from a seawater introduced into a ship, and is characterized in that it has a water-generating device and a heater for heating seawater; The first cooling water passage circulates the cooling water to the air cooler, the air cooler cools the combustion air supplied from the supercharger to the internal combustion engine; and the second cooling water passage circulates the cooling water that cools the internal combustion engine; the first circulation passage Discharging from the first cooling water passage and returning to the first cooling water passage; and the second circulation passage, diverting from the second cooling water passage and returning to the second cooling water passage; and circulating the first circulation Cooling water in the passage and cooling water flowing through the second circulation passage are guided to heat exchange between the heater and the seawater; and the first circulation passage is provided with a first temperature detector and a first flow rate adjustment on the upstream side of the heater a valve, wherein the first flow rate adjustment valve adjusts a flow rate of the cooling water that is guided to the heater; and the second circulation passage is provided with a second temperature detector and a second flow rate adjustment valve on the upstream side of the heater, The flow regulating valve adjusts the flow rate of the cooling water directed to the heater. The water-making system according to claim 7, further comprising a central cooler that cools the cooling water flowing through the first cooling water passage and the second cooling water passage. The water-producing system according to claim 7 or 8, further comprising: a control device connected to the first temperature detector, the second temperature detector, and the first flow rate adjustment a valve and the second flow rate adjusting valve; the control device is individually guided from the first circulation passage and the second circulation passage to When the amount of heat of the cooling water of the heater is lower than the predetermined amount of heat, the first flow rate adjusting valve and the second flow rate adjusting valve are simultaneously opened to guide the cooling water to the heater. The water-producing system according to claim 9, wherein the control device is fully opened by the flow rate adjusting valve of any one of the first flow rate adjusting valve and the second flow rate adjusting valve, and adjusts another flow rate adjustment The amount of opening of the valve causes the amount of heat of the cooling water individually guided to the heater from the first circulation passage and the second circulation passage as the predetermined amount of heat.