JP3158417U - Engine cooling fresh water system for ships - Google Patents

Abstract

An engine cooling fresh water system in a ship that can reduce the number of installed fresh water coolers, reduces the installation space for fresh water coolers, and reduces the piping length of a cooling fresh water line. SOLUTION: A main engine cylinder jacket 1 mounted on a ship and combined fresh water coolers 2a and 2b for supplying cold water to cooling water pumps 9a, 9b and 9c disposed in the power generation engines 8a, 8b and 8c, and the main engine A first temperature sensor arranged at the outlet of the engine cylinder jacket, a second temperature sensor arranged in the cooling water pipes 5a and 5b to the inlet of the cooling fresh water pump of the power generation engine, and the main engine cylinder jacket Cooling supplied to the main engine cylinder jacket based on the detection result of the first temperature sensor arranged at the outlet and the second temperature sensor arranged in the cooling water pipe to the inlet of the cooling fresh water pump of the power generation engine It comprises temperature control valves 4a and 4b for controlling the flow rates of fresh water and cooling fresh water supplied to the power generation engine, respectively. [Selection] Figure 1

Description

  The present invention relates to an engine cooling fresh water system in a ship.

  Conventionally, as an example of a marine engine cooling fresh water system, for example, one disclosed as “conventional cooling water circulation device” in Japanese Patent Application Laid-Open No. 2004-082866 is known. That is, in the “conventional cooling water circulation device” posted in Japanese Patent Application Laid-Open No. 2004-082866, as shown in FIG. 4, a diesel engine 101 is installed in the engine room at the lower part of the hull, and the diesel engine 101 is cooled. A fresh water circulation passage 102 is provided, and an engine cooling fresh water pump 103 is provided in the cooling fresh water circulation passage 102. On the other hand, an air conditioner 104, 105 is provided in a residential area above the hull. A cooling fresh water circulation passage 106 is provided, and an air conditioning cooling fresh water pump 107 is provided in the cooling fresh water circulation passage 106.

  The cooling fresh water circulation passages 102 and 106 communicate with each other through a communication passage 108, and a fresh water expansion tank 110 is connected to the communication passage 108 via a connection passage 109, and overflows via a connection passage 111 of the fresh water expansion tank 110. A tank 112 is connected. And by driving the engine cooling fresh water pump 103, the cooling fresh water can circulate through the cooling fresh water circulation passage 102 and cool the diesel engine 101, and by driving the air conditioning cooling fresh water pump 107, the cooling fresh water The cooling fresh water circulation passage 106 is circulated and supplied to the air conditioners 104 and 105 so that heat exchange (air cooling) can be performed (see paragraph numbers 0003 and 0004 of the publication).

  FIG. 4 is a schematic configuration diagram of the conventional cooling water circulation apparatus shown in the publication (FIG. 2 attached to the publication). Reference numeral 101 shown in FIG. 4 is a diesel engine, 102 is a cooling fresh water circulation passage, and 103 is an engine. Cooling fresh water pumps 104 and 105 are air conditioners, 106 is a cooling fresh water circulation passage, 107 is an air conditioning cooling fresh water pump, 108 is a communication passage, 109 is a connection passage, 110 is a fresh water expansion tank, 111 is The connecting passage 112 is an overflow tank.

  As described above, the engine cooling fresh water system in a ship is generally isolated from a system for cooling the diesel engine 101 of the main engine and a system for cooling the air conditioners 104 and 105, for example. This is the same for other engines that require cooling in a ship. For example, a system for cooling a main engine and a system for cooling a power generation engine are generally cooled separately.

  That is, as shown in FIGS. 3A and 3B, the cooling fresh water line 205 of the main engine cylinder jacket 201 and the cooling fresh water line 215 of the power generation engines 210a, 210b, 210c become separate cooling fresh water lines 205, 215. The cooling fresh water coolers 202, 212a, and 212b are installed in the respective cooling fresh water lines 205 and 215, and the main engine cylinder jacket 201 and the power generation engines 210a, 210b, and 210c are separately cooled. FIGS. 3A and 3B are schematic views showing that the conventional main engine cylinder jacket 201 and the power generation engines 210a, 210b, and 210c are separately cooled.

  As described above, in the engine cooling fresh water system in the ship, the fresh water coolers 202, 212a, and 212b are installed in the cooling fresh water lines 205 and 215 of the main engine cylinder jacket 201 and the power generation engines 210a, 210b, and 210c, respectively. There is a problem that the number of installed 202, 212a, and 212b increases, and the installation space for the fresh water coolers 202, 212a, and 212b is required in a narrow engine room where the ship is limited. Moreover, since the cooling fresh water lines 205 and 215 of the main engine cylinder jacket 201 and the power generation engines 210a, 210b and 210c are separate cooling fresh water lines 205 and 215, the piping length of the cooling fresh water lines 205 and 215 is increased. There was a problem.

JP 2004-082866 A

  In view of the above-described problems in the prior art, the present invention can reduce the number of fresh water coolers installed, reduce the installation space for fresh water coolers, and reduce the length of the cooling fresh water line. It aims at providing the engine cooling fresh water system in the ship which decreases.

In order to achieve the above object, the invention according to claim 1 of the present application is a combined fresh water supplying cold water to a main engine cylinder jacket mounted on a ship and a cooling fresh water pump arranged in the power generation engine in an engine cooling system in a ship. A cooler, a first temperature sensor disposed at an outlet of the main engine cylinder jacket, a second temperature sensor disposed in a cooling water pipe to an inlet of a cooling fresh water pump of the power generation engine, and the main engine cylinder Supplying to the main engine cylinder jacket based on the detection results of the first temperature sensor arranged at the outlet of the jacket and the second temperature sensor arranged in the cooling water pipe to the inlet of the cooling fresh water pump of the power generation engine And a temperature control valve that controls the flow rate of the cooling fresh water to be supplied to the power generation engine. That.
The invention according to claim 2 of the present application is the engine cooling system for a ship according to claim 1, wherein the cooling water pipe for supplying cooling fresh water to the power generation engine is a cooling fresh water pump of a main air compressor. It is characterized by being connected to.

Since this invention is comprised as mentioned above, there exists an effect described below.
Compared with the conventional cooling fresh water cooler for the main engine cylinder jacket and separate cooling cooler for the power generation engine, the cooling fresh water cooler is configured as a combined cooling fresh water cooler so that one cooling fresh water line is used. There are effects such as reduction of the number of Shimizu cooler equipment and pipe length, reduction of settsu space, and reduction of on-site man-hours by reducing pipe length.

FIG. 1 is a diagram showing an outline of an engine cooling fresh water system in a ship according to the first embodiment. FIG. 2 is a diagram illustrating an outline of an engine cooling fresh water system in a ship according to the second embodiment. 3 (a) and 3 (b) are schematic views showing that the conventional main engine cylinder jacket 201 and power generation engines 210a, 210b, and 210c are separately cooled, FIG. 4 is a schematic configuration diagram of a conventional cooling water circulation device disclosed in Japanese Patent Application Laid-Open No. 2004-082866 (FIG. 2 attached to the same publication).

  An embodiment of an engine cooling fresh water system in a ship according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a diagram illustrating an outline of an engine cooling fresh water system in a ship according to the first embodiment. In FIG. 1, reference numeral 1 is a main engine cylinder jacket, 2a and 2b are cooling fresh water coolers, 3 is a cooling water pump, 4a and 4b are temperature control valves, 5a and 5b are cooling water pipes, 6a, 6b is a temperature sensor, 7a and 7b are sensor wires, 8a, 8b and 8c are power generation engines, and 9a, 9b and 9c are cooling fresh water pumps arranged in the power generation engines 8a, 8b and 8c, respectively. is there. In the engine cooling system for a ship according to the first embodiment, a large capacity is considered in consideration of the cause of the low load operation of the generator, the deterioration of power generation fuel consumption, and the failure of the generator from the reduction of the power generation load while the ship is anchored. This is an embodiment assuming an engine cooling system in a ship that is equipped with three generators and can easily increase or decrease the amount of power generation as required, instead of a ship equipped with only one generator.

  As shown in FIG. 1, the engine cooling system in the ship according to the first embodiment stops the fresh water cooler that has conventionally been provided separately for the main engine cylinder jacket 1 and the power generation engines 8a, 8b, and 8c. The engine cylinder jacket 1 and the cooling fresh water pumps 9a, 9b, 9c disposed in each of the power generation engines 8a, 8b, 8c are provided with cooling water pipes 5a, 5b comprising one cooling fresh water line, and the main The fresh water coolers 2a and 2b for supplying cold water to the engine cylinder jacket 1 and the cooling fresh water pumps 9a, 9b and 9c disposed in the power generation engines 8a, 8b and 8c, respectively, are equipped.

  Further, in the engine cooling system in the ship according to the first embodiment, in order to prevent overcooling of the main engine cylinder jacket 1 and keep the cooling fresh water temperature supplied to the main engine cylinder jacket 1 constant (for example, 60 ° C.), A temperature sensor 6a is disposed at the outlet of the main engine cylinder jacket 1, detects the cooling fresh water temperature at the outlet of the main engine cylinder jacket 1, and controls the temperature control valve 4a based on the detection result. On the other hand, in order to prevent overcooling of the power generating engines 8a, 8b, 8c, the temperature of the cooling fresh water supplied to the cooling fresh water pumps 9a, 9b, 9c of the power generating engines 8a, 8b, 8c is constant (for example, 60 ° C.). In order to maintain the temperature sensor 6b in the cooling water pipes 5b from the inlets of the cooling fresh water pumps 9a, 9b, 9c of the power generation engines 8a, 8b, 8c, the cooling fresh water pumps 9a, 9b, 9c The cooling fresh water temperature at each inlet is detected, and the temperature control valve 4b is controlled based on the detection result.

Here, in the engine cooling system in the ship according to the first embodiment, a temperature valve (a temperature balance is not lost) is prevented by adopting a diaphragm valve with less water leakage as the temperature control valves 4a and 4b. It is configured to do.
In a ship equipped with three generators in this way, it is necessary to supply power to the crew members' living and living areas or engine rooms when the crew members work in the ship or to constantly generate power as needed. In the case of the maximum required amount, it is necessary to drive the three generators when they go to bed and when there is no work, etc. There may be no. In such a case, power is generated by only one generator, and the other two generators are suspended. If it does so, the cooling fresh water temperature of the piping 5b for cooling water from each inlet_port | entrance of each said cooling fresh water pump 9a, 9b, 9c will not supply high temperature, but will reduce and supply the supply amount.

As shown in FIG. 1, the engine cooling system in the ship according to the first embodiment is equipped with two cooling fresh water coolers 2a and 2b, and each of the cooling fresh water coolers 2a and 2b shares 50% capacity. However, this is not limited to two units. From the installation space and cooling capacity, one cooling fresh water cooler may be used, and three or more cooling fresh water coolers may be equipped. Anyway, it is good.
By setting it as such a structure, the engine cooling system in the ship which concerns on the present Example 1 can reduce the number of equipment of a cooling fresh water cooler, and also can reduce piping length, installation space, and piping length. It is possible to reduce the number of on-site man-hours through reduction.

  The engine cooling fresh water system in the ship according to the second embodiment includes main air compressors 10a and 10b, which are devices that further require cooling, on the ship assumed in the engine cooling fresh water system in the ship according to the first embodiment. It is the Example which assumed the engine cooling system of the ship to equip.

  FIG. 2 is a diagram showing an outline of the engine cooling fresh water system in the ship according to the second embodiment. The main engine cylinder jacket 1 and the cooling fresh water cooler which are devices necessary for the engine cooling fresh water system in the ship according to the first embodiment. 2a, 2b, cooling water pump 3, temperature regulating valves 4a, 4b, cooling water pipes 5a, 5b, temperature sensors 6a, 6b, sensor wires 7a, 7b, power generation engines 8a, 8b, 8c, cooling fresh water pumps 9a, 9b , 9c, and a ship equipped with main air compressors 10a and 10b and cooling fresh water pumps 11a and 11b arranged in the main air compressors 10a and 10b, respectively.

  In FIG. 2, reference numeral 1 is a main engine cylinder jacket, 2a and 2b are cooling fresh water coolers, 3 is a cooling water pump, 4a and 4b are temperature control valves, 5a and 5b are cooling water pipes, 6a, 6b is a temperature sensor, 7a and 7b are sensor wires, 8a, 8b and 8c are power generation engines, 9a, 9b and 9c are cooling fresh water pumps arranged in the power generation engines 8a, 8b and 8c, 10a and 10b are main air compressors, and 11a and 11b are cooling fresh water pumps disposed in the main air compressors 10a and 10b, respectively.

In addition, in the engine cooling system in the ship which concerns on the present Example 2, the said main air compressor 10a, 10b is equipped for the duplication of an installation.
As shown in FIG. 2, the engine cooling system in the ship according to the second embodiment includes cooling fresh water pumps 9 a, 9 b, 9 c arranged in the main engine cylinder jacket 1 and the power generation engines 8 a, 8 b, 8 c, respectively. The cooling fresh water pumps 11a, 11b arranged in the main air compressors 10a, 10b are connected to the cooling water pipe 5b connected to the cooling fresh water pumps 9a, 9b, 9c, 11a, 11b, respectively. The cooling fresh water is supplied in parallel.

  And in the engine cooling system in the ship which concerns on this Example 2, while supplying the cooling fresh water to the said main engine cylinder jacket 1 similarly to the engine cooling system in the ship which concerns on Example 1, these said power generation engines 8a, Combined fresh water cooler 2a for supplying cooling fresh water to cooling fresh water pumps 9a, 9b, 9c arranged in each of 8b, 8c and cooling fresh water pumps 11a, 11b arranged in each of main air compressors 10a, 10b 2b.

  Further, in the engine cooling system in the ship according to the second embodiment, similarly to the engine cooling system in the ship according to the first embodiment, overcooling of the main engine cylinder jacket 1 is prevented and cooling fresh water supplied to the main engine cylinder jacket 1 is provided. In order to keep the temperature constant (for example, 60 ° C.), a temperature sensor 6 a is disposed at the outlet of the main engine cylinder jacket 1, the cooling fresh water temperature at the outlet of the main engine cylinder jacket 1 is detected, and based on the detection result. The temperature control valve 4a is configured to be controlled, and each cooling fresh water of the power generation engines 8a, 8b, 8c is used to prevent overcooling of the power generation engines 8a, 8b, 8c and the main air compressors 10a, 10b. Cooling fresh water pumps 11a, 11 disposed in the pumps 9a, 9b, 9c and the main air compressors 10a, 10b, respectively. In order to keep the temperature of the cooling fresh water supplied to a constant (for example, 60 ° C.), a temperature sensor 6b is disposed in the cooling water pipe 5b from each inlet of each of the cooling fresh water pumps 9a, 9b, 9c, 11a, 11b, The cooling fresh water temperature at each inlet of each cooling fresh water pump 9a, 9b, 9c, 11a, 11b is detected, and the temperature control valve 4b is controlled based on the detection result.

  Here, also in the engine cooling system in the ship according to the second embodiment, like the engine cooling system in the ship according to the first embodiment, by adopting a diaphragm valve with less water leakage as the temperature control valves 4a and 4b. , Temperature hunting (temperature balance is lost) is prevented.

  As described above, the engine cooling system in the ship according to the second embodiment equipped with the main air compressors 10a and 10b that similarly needs to be cooled in the engine cooling system in the ship according to the first embodiment is equipped with power generation. From the necessity of cooling to the cooling fresh water pumps 9a, 9b, 9c, 11a, 11b of the engines 8a, 8b, 8c and the main air compressors 10a, 10b as necessary, and the need to avoid overcooling, the cooling is appropriately performed. The temperature of the water pipes 5a and 5b is detected, and based on the detection result, control is performed to keep the cooling water temperature to each of these cooling fresh water pumps 9a, 9b, 9c, 11a, and 11b constant (for example, 60 ° C. ).

  By setting it as such a structure, the engine cooling system in the ship which concerns on the present Example 2 can reduce the installation number of cooling fresh water coolers, and also can reduce piping length, installation space, and piping length. It is possible to reduce the number of on-site man-hours through the reduction.

  The present invention is used in an engine cooling system in a ship.

DESCRIPTION OF SYMBOLS 1 Main engine cylinder jacket 2a, 2b Cooling fresh water cooler 3 Cooling water pump 4a, 4b Temperature control valve 5a, 5b Cooling water piping 6a, 6b Temperature sensor 7a, 7b Sensor wire 8a, 8b, 8c Power generation engine 9a, 9b, 9c Cooling fresh water pump 10a, 10b Main air compressor 11a, 11b Cooling fresh water pump 101 Diesel engine 102 Cooling fresh water circulation passage 103 Engine cooling fresh water pump 104, 105 Air conditioning device 106 Cooling fresh water circulation passage 107 Air conditioning cooling fresh water pump 108 Communication passage 109 Connection Passage 110 Fresh water expansion tank 111 Connection passage 112 Overflow tank 201 Main engine cylinder jacket 202 Cooling fresh water cooler 205, 215 Cooling fresh water lines 210a, 210b, 210c Power generation engine

Claims (2)

A combined fresh water cooler that supplies cold water to a main engine cylinder jacket installed in the ship and a cooling fresh water pump arranged in the power generation engine,
A first temperature sensor disposed at an outlet of the main engine cylinder jacket;
A second temperature sensor disposed in a cooling water pipe to the inlet of the cooling fresh water pump of the power generation engine;
Based on the detection result of the first temperature sensor arranged at the outlet of the main engine cylinder jacket and the second temperature sensor arranged in the cooling water pipe to the inlet of the cooling fresh water pump of the power generation engine, the main engine An engine cooling system for a ship, comprising: a cooling fresh water supplied to a cylinder jacket and a temperature control valve for controlling a flow rate of the cooling fresh water supplied to the power generation engine.   The engine cooling system for a ship according to claim 1, wherein the cooling water pipe for supplying cooling fresh water to the power generation engine is connected to a cooling fresh water pump of a main air compressor cylinder jacket.

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