Energy-saving marine central cooling water system

Abstract

The invention relates to the technical field of ships, and discloses an energy-saving marine central cooling water system which comprises a seawater cooling system, a high-temperature fresh water cooling system, a low-temperature fresh water cooling system and a control module. The seawater header pipe is used for guiding seawater into the ship, inlet ends of the first seawater pump and the second seawater pump are both connected with the seawater header pipe, and outlet ends are both connected with the central cooler and used for guiding seawater in the seawater header pipe into the central cooler; a first high-temperature fresh water pipeline is arranged at one end of the first high-temperature fresh water pump and one end of the second high-temperature fresh water pump and connected with the inlet end of the host, and the temperature control valve is connected with the outlet end of the host and used for receiving fresh water absorbing heat of the host in the host; the first low-temperature fresh water pipeline is connected with the temperature control valve; the first low-temperature fresh water pump and the second low-temperature fresh water pump are connected with the central cooler; the control module is electrically connected with the seawater cooling system, the high-temperature fresh water cooling system and the low-temperature fresh water cooling system respectively.

Description

Technical Field

[0001] The invention relates to the technical field of ships, and in particular to an energy-saving central cooling water system for ships. Background Art

[0002] At present, the central cooling water system is a cooling system used in large and medium-sized ships and other occasions. Its main function is to remove the heat generated by equipment or engines through circulating cooling water, so as to keep the equipment running within the normal operating temperature range. The system is usually composed of multiple components, including high-temperature fresh water cooling water pumps, low-temperature fresh water cooling water pumps, seawater cooling pumps and pipelines.

[0003] Its working principle is that when the ship is sailing normally, the high-temperature fresh water cooling water pump runs at a constant speed for a long time, and the system is ventilated or / and replenished with water through the cylinder jacket water expansion tank. At the same time, the low-temperature fresh water cooling water pump also runs at a constant speed for a long time, and the system is ventilated or / and replenished with water through the low-temperature fresh water expansion tank, and the seawater cooling pump also runs at the same time, but its power and output power are determined by the temperature of the low-temperature fresh water cooling water. If its temperature rises, the power / power of the seawater cooling pump increases, and vice versa, it decreases to control the temperature of the low-temperature cooling water system within the set value range. It can be seen from this that the temperature fresh water pump and the low-temperature fresh water pump are always kept at rated power, and only the seawater cooling water pump can automatically adjust its output power through variable frequency.

[0004] The existing central cooling water system has the following shortcomings during use: the power of the high-temperature fresh water cooling water pump and the low-temperature fresh water cooling water pump cannot be adjusted synchronously according to the actual power demand of the main engine, and the design power margin cannot be reduced and controlled during use, resulting in a large amount of surplus ineffective operating power and no energy-saving capability; only the seawater cooling water pump can be frequency-controlled, and the system energy saving range is small; the valves on the cooling water pipes of each device are all manual control valves, and the water supply of each device cannot be automatically controlled, resulting in a low degree of automation. Summary of the invention

[0005] The technical problem to be solved by the present invention is: in the prior art, the power of the high-temperature fresh water cooling pump and the low-temperature fresh water cooling pump cannot be synchronously adjusted according to the actual power demand of the main engine, resulting in the cooling water pump often performing ineffective power and increasing the operating cost of the central cooling water system.

[0006] In order to solve the above technical problems, the present invention provides an energy-saving marine central cooling water system, which includes a seawater cooling system, a high-temperature fresh water cooling system, a low-temperature fresh water cooling system and a control module; the seawater cooling system includes a seawater main, a first seawater pump, a second seawater pump and a central cooler, the seawater main is used to introduce seawater into the ship, the inlet ends of the first seawater pump and the second seawater pump are both connected to the seawater main, and the outlet ends of the first seawater pump and the second seawater pump are both connected to the central cooler, which is used to introduce the seawater in the seawater main into the central cooler; the high-temperature fresh water cooling system includes a first high-temperature fresh water pump, a second high-temperature fresh water pump, a main engine and a temperature control valve, one end of the first high-temperature fresh water pump and the second high-temperature fresh water pump are provided with a first high-temperature fresh water pipeline, the first high-temperature fresh water pipeline is connected to the inlet end of the main engine, and is used to inject high-temperature fresh water into the main engine, the other end of the first high-temperature fresh water pump and the second high-temperature fresh water pump is connected to the central cooler, and is used to introduce low-temperature fresh water into the high-temperature fresh water cooling system, and the temperature control valve is connected to the The main engine is connected to receive high-temperature fresh water in the main engine that absorbs the heat of the main engine; the low-temperature fresh water cooling system includes a first low-temperature fresh water pump, a second low-temperature fresh water pump and a cooled device, the inlet ends of the first low-temperature fresh water pump and the second low-temperature fresh water pump are provided with a first low-temperature fresh water pipeline, the first low-temperature fresh water pipeline is connected to the temperature control valve, and is used to introduce high-temperature fresh water into the low-temperature fresh water cooling system, the first low-temperature fresh water pipeline is connected to the cooled device, the first low-temperature fresh water pump and the second low-temperature fresh water pump are connected to the central cooler, and are used to introduce the low-temperature fresh water in the first low-temperature fresh water pump and the second low-temperature fresh water pump into the central cooler; the control module is electrically connected to the main engine to obtain the power of the main engine, the control module is electrically connected to the seawater cooling system, and is used to control the seawater cooling system according to the power of the main engine, the control module is electrically connected to the high-temperature fresh water cooling system, and is used to control the high-temperature fresh water cooling system according to the power of the main engine, and the control module is electrically connected to the low-temperature fresh water cooling system, and is used to control the low-temperature fresh water cooling system according to the number of cooled devices.

[0007] In one embodiment, a first pipeline, a second pipeline, a second high-temperature fresh water pipeline and a second low-temperature fresh water pipeline are provided on the central cooler, one end of the first pipeline is connected to the seawater inlet end of the central cooler, and the other end is respectively connected to the first seawater pump and the second seawater pump for receiving seawater, one end of the second pipeline is connected to the seawater outlet end of the central cooler, and the other end is connected to an outboard valve for discharging seawater, one end of the second high-temperature fresh water pipeline is connected to the fresh water outlet end of the central cooler, and the other end is respectively connected to the inlet ends of the first high-temperature fresh water pump and the second high-temperature fresh water pump, for introducing cooling fresh water into the high-temperature fresh water cooling system, one end of the second low-temperature fresh water pipeline is connected to the fresh water inlet end of the central cooler, and the other end is respectively connected to the outlet ends of the first low-temperature fresh water pump and the second low-temperature fresh water pump, for introducing low-temperature fresh water into the central cooler.

[0008] In one embodiment, the seawater cooling system also includes a temperature sensor, which is arranged on the second high-temperature fresh water pipeline for real-time monitoring of the temperature of the fresh water in the second high-temperature fresh water pipeline and sending a signal to the control module. The control module is electrically connected to the temperature sensor, and the control module is electrically connected to the first seawater pump and the second seawater pump respectively, for adjusting the power of the first seawater pump and the second seawater pump according to the temperature of the second high-temperature fresh water pipeline.

[0009] In one embodiment, the control module is electrically connected to the first high temperature fresh water pump and the second high temperature fresh water pump respectively, and is used to control the power of the first high temperature fresh water pump and the second high temperature fresh water pump according to the temperature signal sent by the temperature sensor.

[0010] In one embodiment, a first interface, a second interface and a third interface are provided on the temperature control valve. The first interface is connected to the main unit for absorbing high-temperature fresh water in the main unit, the second interface is connected to the second high-temperature fresh water pipeline for returning high-temperature cooled fresh water to the main unit, and the third interface is connected to the first low-temperature fresh water pipeline.

[0011] In one embodiment, the control module is electrically connected to the temperature control valve, and is used to send a control signal to the temperature control valve after calculation according to the temperature signal of the temperature sensor, so as to adjust the opening cross-sectional areas of the second interface and the third interface.

[0012] In one embodiment, there are multiple cooled devices, and each cooled device is connected to a first low-temperature fresh water pipeline for delivering low-temperature fresh water to the cooled device.

[0013] In one embodiment, a solenoid valve is provided on each cooled device, and each solenoid valve is electrically connected to the control module. The solenoid valve is used to transmit the stop or running status of each cooled device to the control module, and the control module adjusts the power of the first low-temperature fresh water pump and the second low-temperature fresh water pump according to this information.

[0014] In one embodiment, the low-temperature fresh water cooling system further includes a fresh water tank, which is connected to the first low-temperature fresh water pump and the second low-temperature fresh water pump respectively, for replenishing water to the low-temperature fresh water cooling system.

[0015] In one embodiment, the control module includes an automatic control panel ACP and a plurality of control circuits connected to the automatic control panel ACP.

[0016] Compared with the prior art, the energy-saving central cooling water system for ships in the embodiment of the present invention has the following beneficial effects: 1) The seawater cooling system includes a seawater main pipe, a first seawater pump, a second seawater pump and a central cooler. The seawater main pipe serves as a seawater introduction pipeline to ensure that seawater can smoothly enter the ship. The first seawater pump and the second seawater pump are used to extract seawater from the seawater main pipe and transport it to the central cooler. The central cooler is a key component for heat exchange between seawater and fresh water. The temperature of fresh water is reduced by the cooling effect of seawater; 2) The high-temperature fresh water cooling system includes a first high-temperature fresh water pump, a second high-temperature fresh water pump and a temperature control valve. The first high-temperature fresh water pump and the second high-temperature fresh water pump are used to transport high-temperature fresh water from the fresh water pipeline to the main engine. , providing cooling for the host, the first high-temperature fresh water pump, the first high-temperature fresh water pipeline at one end of the second high-temperature fresh water pump is a pipeline connecting the fresh water pump with the central cooler and the host, and the temperature control valve adjusts the flow and temperature of the fresh water according to the temperature demand of the host, and at the same time extracts the fresh water that absorbs heat from the host; 3), the low-temperature fresh water cooling system includes a first low-temperature fresh water pump and a second low-temperature fresh water pump, and the first low-temperature fresh water pump and the second low-temperature fresh water pump are used to re-transport the high-temperature fresh water received from the temperature control valve to the central cooler for cooling; 4), the control module is electrically connected to the host, the seawater cooling system, the high-temperature fresh water cooling system and the low-temperature fresh water cooling system, and is used to adjust the operating status of each system in real time according to the working efficiency of the host to achieve energy saving and efficient cooling. At the same time, the use of two pumps in each system can provide redundancy to ensure that each system can still work normally when one of the pumps fails. The present invention effectively solves the problem in the prior art that the power of the high-temperature fresh water cooling water pump and the low-temperature fresh water cooling water pump cannot be synchronously adjusted according to the actual power demand of the host, resulting in the cooling water pump often running ineffectively and increasing the operating cost of the central cooling water system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of an energy-saving marine central cooling water system according to an embodiment of the present invention.

[0018] Figure 2 It is a schematic diagram of an energy-saving marine central cooling water system according to an embodiment of the present invention without showing a control circuit.

[0019] In the figure, 1, seawater cooling system; 11, seawater main; 12, first seawater pump; 13, second seawater pump; 14, central cooler; 141, first pipeline; 142, second pipeline; 143, second high-temperature fresh water pipeline; 144, second low-temperature fresh water pipeline; 15, temperature sensor; 16, outboard valve;

[0020] 2. High-temperature fresh water cooling system; 21. First high-temperature fresh water pump; 22. Second high-temperature fresh water pump; 23. Main engine; 24. Temperature control valve; 241. First interface; 242. Second interface; 243. Third interface; 25. First high-temperature fresh water pipeline;

[0021] 3. Low-temperature fresh water cooling system; 31. First low-temperature fresh water pump; 32. Second low-temperature fresh water pump; 33. First low-temperature fresh water pipeline; 34. Cooling equipment; 35. Solenoid valve; 36. Fresh water tank;

[0022] 4. Control module; 41. Automatic control panel ACP; 42. Control circuit. DETAILED DESCRIPTION

[0023] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] In the description of the present invention, it should be understood that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. The terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0025] In the description of the present invention, it should be understood that the terms "height", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used in the present invention to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In the description of the present invention, it should be understood that the terms "first" and "second" are used in the present invention for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0027] like Figure 1 to Figure 2As shown, an energy-saving marine central cooling water system preferably provided in an embodiment of the present invention comprises a seawater cooling system 1, a high-temperature freshwater cooling system 2, a low-temperature freshwater cooling system 3 and a control module 4; the seawater cooling system 1 comprises a seawater main pipe 11, a first seawater pump 12, a second seawater pump 13 and a central cooler 14, the seawater main pipe 11 is used to introduce seawater into the ship, the inlet ends of the first seawater pump 12 and the second seawater pump 13 are both connected to the seawater main pipe 11, and the outlet ends of the first seawater pump 12 and the second seawater pump 13 are both connected to the central cooler 14, which is used to introduce the seawater main pipe 11 into the ship, The seawater in the pipe 11 is introduced into the central cooler 14; the high-temperature fresh water cooling system 2 includes a first high-temperature fresh water pump 21, a second high-temperature fresh water pump 22, a main engine 23 and a temperature control valve 24. One end of the first high-temperature fresh water pump 21 and the second high-temperature fresh water pump 22 is provided with a first high-temperature fresh water pipeline 25, and the first high-temperature fresh water pipeline 25 is connected to the inlet end of the main engine 23, and is used to inject high-temperature fresh water into the main engine 23. The other ends of the first high-temperature fresh water pump 21 and the second high-temperature fresh water pump 22 are connected to the central cooler 14, and are used to introduce low-temperature fresh water into the high-temperature fresh water cooling system 2. The temperature control valve 24 is connected to the The main engine 23 is connected to receive the high-temperature fresh water in the main engine 23 that absorbs the heat of the main engine 23; the low-temperature fresh water cooling system 3 includes a first low-temperature fresh water pump 31, a second low-temperature fresh water pump 32 and a cooled device 34, the inlet ends of the first low-temperature fresh water pump 31 and the second low-temperature fresh water pump 32 are provided with a first low-temperature fresh water pipeline 33, the first low-temperature fresh water pipeline 33 is connected to the temperature control valve 24, and is used to introduce high-temperature fresh water into the low-temperature fresh water cooling system 3, the first low-temperature fresh water pipeline 33 is connected to the cooled device 34, the first low-temperature fresh water pump 31 and the second low-temperature fresh water pump 32 are connected to the central cooler 1 4 is connected to introduce the low-temperature fresh water in the first low-temperature fresh water pump 31 and the second low-temperature fresh water pump 32 into the central cooler 14; the control module 4 is electrically connected to the host 23 to obtain the power of the host 23, the control module 4 is electrically connected to the seawater cooling system 1 to control the seawater cooling system 1 according to the power of the host 23, the control module 4 is electrically connected to the high-temperature fresh water cooling system 2 to control the high-temperature fresh water cooling system 2 according to the power of the host 23, and the control module 4 is electrically connected to the low-temperature fresh water cooling system 3 to control the low-temperature fresh water cooling system 3 according to the number of cooled equipment 34.

[0028] Based on the above technical features, the seawater cooling system 1 in the present invention includes a seawater main pipe 11, a first seawater pump 12, a second seawater pump 13 and a central cooler 14. The seawater main pipe 11 is used as a seawater introduction pipeline to ensure that seawater can smoothly enter the ship. The functions of the first seawater pump 12 and the second seawater pump 13 are to extract seawater from the seawater main pipe 11 and transport it to the central cooler 14. The central cooler 14 is a key component for heat exchange between seawater and fresh water. The temperature of the fresh water is reduced by the cooling effect of seawater; the high-temperature fresh water cooling system 2 includes a first high-temperature fresh water pump 21, a second high-temperature fresh water pump 22 and a temperature control valve 24. The first high-temperature fresh water pump 21 and the second high-temperature fresh water pump 22 are used to transport high-temperature fresh water from the fresh water pipeline to the main engine 23 to provide cooling for the main engine 23. The first high-temperature fresh water pipeline 25 at one end of the high-temperature fresh water pump 21 and the second high-temperature fresh water pump 22 is a pipeline connecting the fresh water pump with the central cooler 14 and the host 23. The temperature control valve 24 adjusts the flow and temperature of the fresh water according to the temperature requirement of the host 23, and at the same time extracts the fresh water that absorbs heat from the host 23; the low-temperature fresh water cooling system 3 includes a first low-temperature fresh water pump 31 and a second low-temperature fresh water pump 32, which are used to re-transport the high-temperature fresh water received from the temperature control valve 24 to the central cooler 14 for cooling; the control module is electrically connected to the host 23, the seawater cooling system 1, the high-temperature fresh water cooling system 2 and the low-temperature fresh water cooling system 3, and is used to adjust the operating status of each system in real time according to the working efficiency of the host 23 to achieve energy saving and efficient cooling. At the same time, the use of two pumps in each system can provide redundancy to ensure that each system can still work normally when one of the pumps fails.

[0029] As some embodiments of the present invention, Figure 2As shown, the central cooler 14 is provided with a first pipeline 141, a second pipeline 142, a second high-temperature fresh water pipeline 143 and a second low-temperature fresh water pipeline 144. One end of the first pipeline 141 is connected to the seawater inlet end of the central cooler 14, and the other end is respectively connected to the first seawater pump 12 and the second seawater pump 13 for receiving seawater. One end of the second pipeline 142 is connected to the seawater outlet end of the central cooler 14, and the other end is connected to an outboard valve for discharging seawater. One end of the second high-temperature fresh water pipeline 143 is connected to the fresh water outlet end of the central cooler 14, and the other end is respectively connected to the inlet ends of the first high-temperature fresh water pump 21 and the second high-temperature fresh water pump 22 for introducing cooling fresh water into the high-temperature fresh water cooling system 2. One end of the second low-temperature fresh water pipeline 144 is connected to the fresh water inlet end of the central cooler 14, and the other end is respectively connected to the outlet ends of the first low-temperature fresh water pump 31 and the second low-temperature fresh water pump for introducing low-temperature fresh water into the central cooler 14. Among them, one end of the first pipeline 141 is connected to the central cooler 14, and the other end is connected to the first seawater pump 12 and the second seawater pump 13 respectively. When the seawater pump is started, seawater is pumped into the central cooler 14 through the first pipeline 141 to provide a necessary cold source for the subsequent cooling process; the second pipeline 142 is used to discharge seawater. The temperature of the seawater after heat exchange in the central cooler 14 will increase. At this time, it needs to be discharged to the outside of the ship through the second pipeline 142 to maintain the continuous flow and effective cooling of the seawater in the central cooler 14. The outboard valve 16 is used to control the discharge of seawater to ensure that the seawater can be discharged quickly and safely when needed. Water; the second high-temperature fresh water pipeline 143 introduces cooling fresh water to the high-temperature fresh water cooling system 2. The fresh water cooled by the central cooler 14 is transported to the high-temperature fresh water cooling system 2 through this pipeline, and is used to provide low-temperature fresh water for the main engine 23 and other equipment that needs cooling; the second low-temperature fresh water pipeline 144 conducts low-temperature fresh water to the central cooler 14. The temperature of the fresh water that absorbs heat from the high-temperature fresh water cooling system 2 will increase. At this time, it needs to return to the central cooler 14 through this pipeline for cooling. This process forms a closed-loop cooling system, which ensures that the fresh water can continuously and effectively provide cooling for the main engine 23 and other equipment.

[0030] As some embodiments of the present invention, Figure 2As shown, the seawater cooling system 1 also includes a temperature sensor 15, which is arranged on the second high-temperature fresh water pipeline 143 for real-time monitoring of the temperature of the fresh water in the second high-temperature fresh water pipeline 143, and sends a signal to the control module, which is electrically connected to the temperature sensor 15, and the control module is electrically connected to the first seawater pump 12 and the second seawater pump 13 respectively, for adjusting the power of the first seawater pump 12 and the second seawater pump 13 according to the temperature of the second high-temperature fresh water pipeline 143. After adding the temperature sensor 15, the seawater cooling system 1 realizes real-time monitoring and precise control of the fresh water temperature. By working in coordination with the control module, the system can dynamically adjust the power of the seawater pump according to actual needs, thereby improving the cooling efficiency, reducing energy consumption and enhancing the stability of the system. This optimization measure is of great significance for improving the performance and reliability of the entire energy-saving marine central cooling water system.

[0031] As some embodiments of the present invention, Figure 2 As shown, the control module is electrically connected to the first high-temperature fresh water pump 21 and the second high-temperature fresh water pump 22, respectively, and is used to control the power of the first high-temperature fresh water pump 21 and the second high-temperature fresh water pump 22 according to the temperature signal sent by the temperature sensor 15. The speed of the working seawater cooling pump is automatically controlled by the temperature signal sent by the temperature sensor on the second high-temperature fresh water pipeline 143 of the central cooler 14 to the control module. When its temperature reaches the set high temperature value, its speed will run at the rated speed / rated power point. If the load of the main engine 23 and all other related equipment is reduced, causing the low-temperature fresh water temperature of the system to drop, the speed of the seawater pump will drop synchronously, so that the operating load of the seawater cooling water pump matches the total load of all the equipment to be cooled.

[0032] As some embodiments of the present invention, Figure 1 As shown, the temperature control valve 24 is provided with a first interface 241, a second interface 242 and a third interface 243. The first interface 241 is connected to the main unit 23 for absorbing high-temperature fresh water in the main unit 23, the second interface 242 is connected to the second high-temperature fresh water pipeline 143 for returning high-temperature cooling fresh water to the main unit, and the third interface 243 is connected to the first low-temperature fresh water pipeline 33. The first interface 241 is used to receive the high-temperature fresh water in the main unit 23. The main unit 23 will generate a large amount of heat during operation, causing the temperature of the fresh water to rise. The temperature control valve 24 receives the high-temperature fresh water through the first interface 241 for subsequent cooling treatment; the second interface 242 is used to receive the cooling fresh water in the second high-temperature fresh water pipeline 143. The temperature control valve 24 introduces the cooling fresh water into the system through the second interface 242, and mixes or replaces it with the high-temperature fresh water to achieve the purpose of cooling; the cooled low-temperature fresh water enters the first low-temperature fresh water pipeline 33 through the third interface 243, which is convenient for cooling the cooling equipment 34 that needs to be cooled by low-temperature fresh water in the future, and effectively reduces the energy consumption of the entire system.

[0033] As some embodiments of the present invention, Figure 1 As shown, the control module is electrically connected to the temperature control valve 24, and is used to send a control signal to the temperature control valve 24 after calculation according to the temperature signal of the temperature sensor 15, so as to adjust the opening cross-sectional area of ​​the second interface 242 and the third interface 243. The two opening flows of the second interface 242 and the third interface 243 will be sent to the temperature control valve 24 by the temperature sensor signal through the control module, and the control signal will be sent to the temperature control valve 24 after calculation, so as to realize automatic control thereof. When the outlet temperature of the high-temperature cooling fresh water of the main engine 23 decreases, the opening cross-sectional area of ​​the third interface 243 decreases and the opening cross-sectional area of ​​the second interface 242 increases, the amount of high-temperature fresh water entering the low-temperature fresh water cooling system 3 decreases, the amount of circulating high-temperature return water increases, and the amount of low-temperature cooling fresh water supplemented to the high-temperature cooling fresh water decreases accordingly.

[0034] Furthermore, the flow rate of the first interface 241 is equal to the flow rate of the second interface 242 plus the flow rate of the third interface 243 , and the flow rate of the first interface 241 is equal to the flow rates output by the first high-temperature fresh water pump 21 and the second high-temperature fresh water pump 22 .

[0035] As some embodiments of the present invention, Figure 1 to Figure 2 As shown, there are multiple cooled devices 34, and each cooled device 34 is connected to the first low-temperature fresh water pipeline 33 for delivering low-temperature fresh water to the cooled device 34. Each cooled device 34 is connected to the first low-temperature fresh water pipeline 33 directly or through a branch pipeline. The first low-temperature fresh water pipeline 33 is responsible for introducing low-temperature fresh water that has been cooled to each cooled device 34. The low-temperature fresh water circulates inside the cooled device 34, absorbs and takes away the heat generated by the generator, and then returns to the low-temperature cooling system through the pipeline for re-cooling. Connecting multiple cooled devices 34 to the first low-temperature fresh water pipeline 33 is an important component of the energy-saving marine low-temperature fresh water cooling system 3. This design not only improves the cooling efficiency of the cooled device 34, but also ensures the stable operation of the equipment under various working conditions. Through precise temperature control and efficient heat transfer, the low-temperature fresh water cooling system 3 provides reliable protection and support for key equipment on board.

[0036] As some embodiments of the present invention, Figure 1 to Figure 2As shown, each cooled device 34 is provided with a solenoid valve 35, each solenoid valve 35 is electrically connected to the control module, and the solenoid valve 35 is used to transmit the stop or running state of each cooled device 34 to the control module, and the control module adjusts the power of the first low-temperature fresh water pump 31 and the second low-temperature fresh water pump 32 according to this information. Each cooled device 34 is equipped with a solenoid valve 35, which not only controls the flow of low-temperature fresh water, but also is responsible for transmitting the state information of the cooled device 34 to the control module. The solenoid valve 35 can sense the working state of the cooled device 34 (such as start, run, stop, etc.), and convert these state information into electrical signals and send them to the control module. Based on the processed information, the control module can dynamically adjust the power of the first low-temperature fresh water pump 31 and the second low-temperature fresh water pump 32. When a certain cooled device 34 needs more cooling fresh water, the control module will increase the power of the corresponding pump to provide more low-temperature fresh water. When the demand of the cooled device 34 decreases or stops, the control module will reduce the power of the pump to save energy.

[0037] As some embodiments of the present invention, Figure 2 As shown, the low-temperature fresh water cooling system 3 also includes a fresh water tank 36, which is connected to the first low-temperature fresh water pump 31 and the second low-temperature fresh water pump 32 respectively, and is used to replenish water for the low-temperature fresh water cooling system 3. Through the arrangement of the fresh water tank 36, the fresh water in the low-temperature fresh water cooling system 3 plays a buffering role due to the change in water volume caused by the change in water temperature, thereby preventing the pressure in the first low-temperature fresh water pipeline 33 from being too high or too low. The fresh water tank 36 can realize the automatic water replenishment function of the system, thereby improving the stability and energy efficiency of the system.

[0038] As some embodiments of the present invention, Figure 1 As shown, the control module includes an automatic control board ACP41 and a plurality of control circuits 42 connected to the automatic control board ACP41. The automatic control board ACP41 is the brain of the control module. It is responsible for receiving signals from devices such as temperature sensors 15 and solenoid valves 35 through a plurality of control circuits 42, and processes these signals according to a preset program or logic. The input signals of the automatic control board are respectively taken from the operating status of each related device, the temperature of low-temperature cooling fresh water, the working status of each solenoid valve 35, the outlet temperature of the high-temperature cooling fresh water of the host 23, etc. After the input signal is calculated by the software, it outputs a control signal to the seawater cooling pump, the low-temperature fresh water cooling pump, the high-temperature fresh water cooling pump, the solenoid valve 35, the temperature control valve 24, etc. for automatic control, and displays each control status.

[0039] In summary, the embodiment of the present invention provides an energy-saving marine central cooling water system, which has the following beneficial effects compared with the prior art: 1) The seawater cooling system 1 includes a seawater main pipe 11, a first seawater pump 12, a second seawater pump 13 and a central cooler 14. The seawater main pipe 11 serves as a seawater introduction pipeline to ensure that seawater can smoothly enter the ship. The first seawater pump 12 and the second seawater pump 13 are used to extract seawater from the seawater main pipe 11 and transport it to the central cooler 14. The central cooler 14 is a key component for heat exchange between seawater and fresh water. The temperature of the fresh water is reduced by the cooling effect of seawater; 2) The high-temperature fresh water cooling system 2 includes a first high-temperature fresh water pump 21, a second high-temperature fresh water pump 22 and a temperature control valve 24. The first high-temperature fresh water pump 21 and the second high-temperature fresh water pump 22 are used to transport high-temperature fresh water from the fresh water pipeline to the main engine 2 3. Provide cooling for the host 23. The first high-temperature fresh water pipeline 25 at one end of the first high-temperature fresh water pump 21 and the second high-temperature fresh water pump 22 is a pipeline connecting the fresh water pump with the central cooler 14 and the host 23. The temperature control valve 24 adjusts the flow and temperature of the fresh water according to the temperature requirement of the host 23, and at the same time extracts the fresh water that absorbs heat from the host 23; 3) The low-temperature fresh water cooling system 3 includes a first low-temperature fresh water pump 31 and a second low-temperature fresh water pump 32. The first low-temperature fresh water pump 31 and the second low-temperature fresh water pump 32 are used to re-transport the high-temperature fresh water received from the temperature control valve 24 to the central cooler 14 for cooling; 4) The control module is electrically connected to the host 23, the seawater cooling system 1, the high-temperature fresh water cooling system 2 and the low-temperature fresh water cooling system 3, and is used to adjust the operating status of each system in real time according to the working efficiency of the host 23 to achieve energy saving and efficient cooling. At the same time, the use of two pumps in each system can provide redundancy to ensure that each system can still work normally when one of the pumps fails.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. An energy-saving marine central cooling water system, characterized in that: Including seawater cooling system, high-temperature fresh water cooling system, low-temperature fresh water cooling system and control module; The seawater cooling system comprises a seawater main pipe, a first seawater pump, a second seawater pump and a central cooler. The seawater main pipe is used to introduce seawater into the ship. The inlet ends of the first seawater pump and the second seawater pump are both connected to the seawater main pipe. The outlet ends of the first seawater pump and the second seawater pump are both connected to the central cooler to introduce the seawater in the seawater main pipe into the central cooler. The high-temperature fresh water cooling system comprises a first high-temperature fresh water pump, a second high-temperature fresh water pump, a main engine and a temperature control valve, one end of the first high-temperature fresh water pump and the second high-temperature fresh water pump is provided with a first high-temperature fresh water pipeline, the first high-temperature fresh water pipeline is connected to the inlet end of the main engine, and is used to inject high-temperature fresh water into the main engine, the other end of the first high-temperature fresh water pump and the second high-temperature fresh water pump is connected to the central cooler, and is used to introduce low-temperature fresh water into the high-temperature fresh water cooling system, and the temperature control valve is connected to the main engine, and is used to receive the high-temperature fresh water in the main engine that absorbs the heat of the main engine; The low-temperature fresh water cooling system comprises a first low-temperature fresh water pump, a second low-temperature fresh water pump and a cooled device, wherein the inlet ends of the first low-temperature fresh water pump and the second low-temperature fresh water pump are provided with a first low-temperature fresh water pipeline, the first low-temperature fresh water pipeline is connected to the temperature control valve, and is used to introduce high-temperature fresh water into the low-temperature fresh water cooling system, the first low-temperature fresh water pipeline is connected to the cooled device, the first low-temperature fresh water pump and the second low-temperature fresh water pump are connected to the central cooler, and are used to introduce the low-temperature fresh water in the first low-temperature fresh water pump and the second low-temperature fresh water pump into the central cooler; The control module is electrically connected to the host and is used to obtain the power of the host. The control module is electrically connected to the seawater cooling system and is used to control the seawater cooling system according to the power of the host. The control module is electrically connected to the high-temperature fresh water cooling system and is used to control the high-temperature fresh water cooling system according to the power of the host. The control module is electrically connected to the low-temperature fresh water cooling system and is used to control the low-temperature fresh water cooling system according to the number of cooled devices.

2. The energy-saving marine central cooling water system according to claim 1 is characterized in that: The central cooler is provided with a first pipeline, a second pipeline, a second high-temperature fresh water pipeline and a second low-temperature fresh water pipeline. One end of the first pipeline is connected to the seawater inlet end of the central cooler, and the other end is connected to the first seawater pump and the second seawater pump for receiving seawater. One end of the second pipeline is connected to the seawater outlet end of the central cooler, and the other end is connected to an outboard valve for discharging seawater. One end of the second high-temperature fresh water pipeline is connected to the fresh water outlet end of the central cooler, and the other end is connected to the inlet ends of the first high-temperature fresh water pump and the second high-temperature fresh water pump, respectively, for introducing cooling fresh water into the high-temperature fresh water cooling system. One end of the second low-temperature fresh water pipeline is connected to the fresh water inlet end of the central cooler, and the other end is connected to the outlet ends of the first low-temperature fresh water pump and the second low-temperature fresh water pump, respectively, for introducing low-temperature fresh water into the central cooler.

3. The energy-saving marine central cooling water system according to claim 2 is characterized in that: The seawater cooling system also includes a temperature sensor, which is arranged on the second high-temperature fresh water pipeline for real-time monitoring of the temperature of the fresh water in the second high-temperature fresh water pipeline and sending a signal to the control module. The control module is electrically connected to the temperature sensor, and the control module is electrically connected to the first seawater pump and the second seawater pump respectively, for adjusting the power of the first seawater pump and the second seawater pump according to the temperature of the second high-temperature fresh water pipeline.

4. The energy-saving marine central cooling water system according to claim 3 is characterized in that: The control module is electrically connected to the first high-temperature fresh water pump and the second high-temperature fresh water pump respectively, and is used to control the power reaching the first high-temperature fresh water pump and driving the second high-temperature fresh water pump according to the temperature signal sent by the temperature sensor.

5. The energy-saving marine central cooling water system according to claim 1 is characterized in that: The temperature control valve is provided with a first interface, a second interface and a third interface. The first interface is connected to the main unit for absorbing high-temperature fresh water in the main unit, the second interface is connected to the second high-temperature fresh water pipeline for returning high-temperature cooling fresh water to the main unit, and the third interface is connected to the first low-temperature fresh water pipe.

6. The energy-saving marine central cooling water system according to claim 5, characterized in that: The control module is electrically connected to the temperature control valve, and is used to send a control signal to the temperature control valve after calculation according to the temperature signal of the temperature sensor, so as to adjust the opening cross-sectional areas of the second interface and the third interface.

7. The energy-saving marine central cooling water system according to claim 1, characterized in that: There are multiple cooled devices, and each cooled device is connected to the first low-temperature fresh water pipeline for delivering low-temperature fresh water to the cooled device.

8. The energy-saving marine central cooling water system according to claim 7, characterized in that: Each of the cooled devices is provided with a solenoid valve, and each of the solenoid valves is electrically connected to the control module. The solenoid valve is used to transmit the stop or running status of each cooled device to the control module, and the control module adjusts the power of the first low-temperature fresh water pump and the second low-temperature fresh water pump according to this information.

9. The energy-saving marine central cooling water system according to claim 8, characterized in that: The low-temperature fresh water cooling system further comprises a fresh water tank, which is respectively connected to the first low-temperature fresh water pump and the second low-temperature fresh water pump and is used to replenish water for the low-temperature fresh water cooling system.

10. The energy-saving marine central cooling water system according to claim 1, characterized in that: The control module includes an automatic control panel ACP and a plurality of control circuits connected to the automatic control panel ACP.

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