A freshwater cooling system and design method for submersible electronic equipment

Abstract

The present invention discloses a freshwater cooling system for submersible electronic equipment, comprising a cooling pump group, a heat pipe cooling device, an outlet main pipe, a water supply main pipe, a plurality of partition main pipes, and a return water main pipe. The cooling pump group, the outlet main pipe, the heat source channel of the heat pipe cooling device, and the water supply main pipe are sequentially connected; the water supply main pipe is connected to the inlets of a plurality of partition main pipes, and each partition main pipe is connected to a plurality of branch pipes flowing through the water-cooled electronic and electrical equipment in the partition, the outlets of the branch pipes are connected to the return water main pipe, and the outlet of the return water main pipe is connected to the inlet of the cooling pump group. The present invention also discloses a flow distribution design method and a heat exchange design method for the freshwater cooling system for submersible electronic equipment as described above. The beneficial effects of the present invention are as follows: the present invention can achieve refined flow distribution of electronic and electrical equipment in the case of dispersed submersible layout and different flow resistance characteristics through the method of partition flow distribution control and throttling element flow resistance correction, thereby meeting the cooling needs of all electronic and electrical equipment in the submersible.

Description

Technical Field

[0001] The present invention relates to the technical field of ship system design, and in particular to a freshwater cooling system for submersible electronic equipment and a design method thereof. Background Art

[0002] The freshwater cooling system for submersible electronic equipment provides cooling for the submersible's water-cooled electronic and electrical equipment. The use of water cooling for electronic and electrical equipment can not only improve the cooling efficiency of electronic and electrical equipment, reduce cabin heat dissipation, and improve the cabin working environment, but also control the air noise in the submarine cabin, thereby improving combat comfort and vibration and noise reduction effects.

[0003] Submersibles contain numerous water-cooled electronic and electrical equipment, distributed across various compartments in a relatively dispersed arrangement. This requires high cooling water quality, a complex cooling system network, and challenging flow distribution. However, with increasing demands for comfort, energy conservation, and noise reduction in submersibles, traditional air cooling methods for electronic and electrical equipment are no longer sufficient. Summary of the Invention

[0004] The purpose of the present invention is to provide a freshwater cooling system and design method for submersible electronic equipment that can meet the cooling needs and overall vibration and noise reduction requirements of submersible water-cooled electronic and electrical equipment in response to the shortcomings of the existing technology.

[0005] The technical solution adopted by the present invention is: a freshwater cooling system for submersible electronic equipment, including a cooling pump group, a heat pipe cooling device, an outlet main pipe, a water supply main pipe, several partition main pipes and a return water main pipe, the outlet of the cooling pump group is connected to the inlet of the outlet main pipe, the outlet of the outlet main pipe is connected to the heat source channel of the heat pipe cooling device, and the outlet of the heat source channel of the heat pipe cooling device is connected to the water supply main pipe; the water supply main pipe is connected to the inlets of multiple partition main pipes, each partition main pipe is connected to several branch pipes flowing through the water-cooled electronic and electrical equipment in the partition, the outlet of the branch pipe is connected to the return water main pipe, and the outlet of the return water main pipe is connected to the inlet of the cooling pump group; a low-noise flow regulating valve is arranged on the partition main pipe outside the partition with the largest flow resistance; each branch pipe connected to the same partition main pipe is equipped with a throttling element on the branch pipe with small flow resistance.

[0006] According to the above solution, the water supply main pipe is sequentially provided with a water supply temperature transmitter, a water supply pressure transmitter, a safety valve and a drain valve along the fluid flow direction.

[0007] According to the above scheme, the return water main pipe is sequentially provided with a return water temperature transmitter and a return water pressure transmitter along the fluid flow direction; the return water main pipe is connected to the water supply pipeline, and the water supply pipeline is provided with a water injection and water supply valve.

[0008] According to the above scheme, the fresh water cooling system of the submersible electronic equipment is further provided with a fresh water cooler, which is arranged in parallel with the heat pipe cooling device, and the two share a heat source channel; a salinometer is installed in the heat source channel.

[0009] According to the above solution, the inlet and outlet ends of the heat source channel are respectively connected to the two ends of the fourth pipeline, and the fourth pipeline is installed with an ion filter and an electric-controlled ball valve.

[0010] According to the above scheme, the fresh water cooling system of the submersible electronic equipment is equipped with two cooling pump groups, the inlets of the two cooling pump groups are respectively connected to the return water main pipe, and the outlets of the two cooling pump groups are respectively connected to the outlet main pipe.

[0011] According to the above solution, the inlet and outlet of the cooling pump group are connected through a pressure-taking pipeline, and a differential pressure transmitter is provided on the pressure-taking pipeline.

[0012] According to the above solution, a fresh water accumulator is also provided on the return water main.

[0013] The present invention also provides a flow distribution design method for the fresh water cooling system of the submersible electronic equipment as described above, comprising the following steps:

[0014] Step 1: Divide the submersible electronic and electrical equipment into several zones based on the proximity principle according to their layout and characteristics, and perform zone flow control on the submersible electronic and electrical equipment;

[0015] Step 2: Based on the measured flow and resistance characteristics of the water-cooled electronic and electrical equipment pipelines, throttling elements are configured to correct the flow resistance of all water-cooled electronic and electrical equipment pipelines in the same zone to be consistent. Specifically, throttling elements are not configured on the water-cooled electronic and electrical equipment pipeline with the largest flow resistance, while throttling elements are configured at the inlets of other water-cooled electronic and electrical equipment pipelines with smaller flow resistances to correct the flow resistance to the maximum measured flow resistance in the zone.

[0016] Step 3: Detect the flow and resistance characteristic measurement data of each partition main pipe. Except for the partition with the largest flow resistance, configure low-noise flow control valves on the partition main pipes with small flow resistance for fine adjustment of the partition flow.

[0017] The present invention also provides a heat exchange design method for the freshwater cooling system of the submersible electronic equipment as described above, the method comprising:

[0018] Calculate the heat load of all water-cooled electronic and electrical equipment under different operating conditions, and design the freshwater cooler based on the cooling water flow, maximum total heat load, and maximum water supply temperature, so that the heat exchange capacity of the freshwater cooler meets the cooling requirements of all surface and underwater systems;

[0019] Design the heat pipe cooling device based on the cooling water flow rate, the total heat load of the underwater quiet navigation condition, and the maximum water supply temperature, so that the heat exchange capacity of the heat pipe cooling device meets the cooling requirements of the underwater quiet navigation condition system;

[0020] The fresh water cooler and the heat pipe cooling device are arranged in parallel. The fresh water cooler provides a backup for the heat pipe cooling device. The heat exchange mode is determined according to the navigation conditions of the submersible. The heat pipe cooling device is used to cool the fresh water of the fresh water cooling system of the electronic equipment during underwater navigation. When the heat pipe cooling device fails, the fresh water cooler is switched to cooling. When operating under surface navigation conditions, the fresh water cooler is switched to operation.

[0021] The beneficial effects of the present invention are:

[0022] 1. The present invention can achieve refined flow distribution of electronic and electrical equipment in the case of dispersed submersible layout and different flow resistance characteristics through zoned flow distribution control and throttling element flow resistance correction, thereby meeting the cooling needs of all electronic and electrical equipment in the submersible.

[0023] 2. The present invention has the function of real-time monitoring and purification of fresh water quality, and can purify water quality on demand during the operation of the system without affecting the normal use and operation of the system.

[0024] 3. The heat exchange design of the present invention adopts a backup method of freshwater cooler and heat pipe cooling device. The passive heat pipe cooling device is used for cooling during quiet underwater navigation conditions, and the freshwater cooler is used for cooling during all navigation conditions on the surface and underwater, which is beneficial to vibration and noise reduction during quiet underwater navigation conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural diagram of a specific embodiment of the present invention.

[0026] Among them: 1-cooling pump group; 2-heat pipe cooling device; 3-fresh water cooler; 4-fresh water accumulator; 5-ion filter; 6-throttling element; 7-electrically controlled ball valve; 8-low noise flow control valve; 9-safety valve; 10-water injection and replenishment valve; 11-drain valve; 12-salinity meter; 13-differential pressure transmitter; 14-supply water temperature transmitter; 15-return water temperature transmitter; 16-supply water pressure transmitter; 17-return water pressure transmitter; 18-outlet main pipe; 19-supply water main pipe; 20-return water main pipe; 21-zone main pipe; 22-branch pipeline; 23-pressure sampling pipeline. DETAILED DESCRIPTION

[0027] In order to better understand the present invention, the present invention is further described below with reference to the accompanying drawings and specific embodiments.

[0028] like Figure 1The freshwater cooling system for submersible electronic equipment shown in the figure includes a cooling pump group 1, a heat pipe cooling device 2, an outlet main pipe 18, a water supply main pipe 19, several zone main pipes 21 and a return water main pipe 20. The outlet of the cooling pump group 1 is connected to the inlet of the outlet main pipe 18, the outlet of the outlet main pipe 18 is connected to the heat source channel of the heat pipe cooling device 2, and the outlet of the heat source channel of the heat pipe cooling device 2 is connected to the water supply main pipe 19; the water supply main pipe 19 is connected to the inlet of multiple zone main pipes 21, and each zone main pipe 21 is connected to several branch pipes 22 flowing through each water-cooled electronic and electrical equipment in the zone. The outlet of 22 is connected to the return water main 20, and the outlet of the return water main 20 is connected to the inlet of the cooling pump group 1; a low-noise flow regulating valve 8 is arranged on the partition main 21 outside the partition with the largest flow resistance (that is, the partition main 21 with the largest flow resistance is not arranged with a low-noise flow regulating valve 8, and the other partition mains 21 are arranged with low-noise flow regulating valves 8); each branch pipe 22 connected to the same partition main 21 is equipped with a throttling element 6 on the branch pipe 22 with small flow resistance, that is, the branch pipe 22 with the largest flow resistance is not equipped with a throttling element 6, and the other branch pipes 22 are all equipped with throttling elements 6.

[0029] In the present invention, the cooling pump group 1 is a fluid power drive unit of the fresh water cooling system, which delivers cooling water to various water-cooled electronic and electrical equipment in the submersible. The heat pipe cooling device 2 is a passive heat pipe heat exchanger, which consists of an evaporator, a working fluid pipeline and an outboard condenser. It is used for heat exchange under quiet working conditions underwater, and the heat of the electronic and electrical equipment is brought to the outboard through the working fluid. The heat pipe cooling device 2 is a common equipment in the industry. Its structure and function are all existing technologies and will not be described here. The partition main pipe 21 is used to distribute the cooling water in the water supply main pipe 19 to each partition; the branch pipe 22 is used to distribute the cooling water in the partition main pipe 21 to each water-cooled electronic and electrical equipment in the corresponding partition. The low-noise flow regulating valve 8 is used to adjust the flow of each partition main pipe 21 to achieve fine-grained flow regulation. The flow resistance characteristics of the throttling element 6 are adjustable and are used to correct the flow resistance of water-cooled electronic and electrical equipment. The correction value is set according to the actual measured value of the flow resistance of the water-cooled electronic and electrical equipment, and is fixed after setting.

[0030] Preferably, the water supply main pipe 19 is provided with a water supply temperature transmitter 14, a water supply pressure transmitter 16, a safety valve 9 and a drain valve 11 in sequence along the fluid flow direction.

[0031] In this invention, the water supply temperature transmitter 14 is used to monitor the freshwater supply temperature and is installed on the system's water supply main 19. The water supply pressure transmitter 16 monitors the water supply pressure. When the pressure exceeds a set value of 0.4 MPa, the safety valve 9 trips to release water and reduce pressure. The safety valve 9 controls the system's water pressure and has a set trip pressure of 0.4 MPa. When the system's water supply pressure exceeds 0.4 MPa, the safety valve 9 trips, releasing water to reduce the system pressure to below the set value. The drain valve 11 is used to release freshwater during system maintenance or when the system is out of service during winter. It should be placed at a low point in the pipeline.

[0032] Preferably, the return water main pipe 20 is provided with a return water temperature transmitter 15 and a return water pressure transmitter 17 in sequence along the fluid flow direction; the return water main pipe 20 is connected to the water supply pipeline, and the water supply pipeline is provided with a water injection and supply valve 10.

[0033] In the present invention, the return water temperature transmitter 15 is used to monitor the freshwater return temperature and is installed on the system's return water main 20. The return water pressure transmitter 17 monitors the inlet pressure of the freshwater pump group and replenishes the system when the system pressure is low. The injection and replenishment valve 10 is used to inject and replenish the freshwater system. During the initial system filling or when the return water pressure transmitter 17 detects low system pressure, the injection and replenishment valve 10 is opened to allow injection or replenishment of water through an external water replenishment device or system.

[0034] Preferably, the submersible electronic equipment fresh water cooling system is further provided with a fresh water cooler 3, which is arranged in parallel with the heat pipe cooling device 2, and the two share a heat source channel; a salinometer 12 is installed in the heat source channel.

[0035] In the present invention, the freshwater cooler 3 is a seawater / freshwater heat exchanger that provides heat exchange for electronic equipment during both surface and underwater navigation. It is arranged in parallel with the heat pipe cooling device 2, providing a backup for the latter and transferring heat from the electronic equipment overboard via seawater. A salinometer 12 monitors the salinity of the freshwater. When the salinity exceeds a set limit, the electronically controlled ball valve 7 opens, activating the system's water purification function. Once the water is purified, the electronically controlled ball valve 7 closes.

[0036] Preferably, the inlet and outlet ends of the heat source channel are respectively connected to the two ends of the fourth pipeline, and the fourth pipeline is installed with an ion filter 5 and an electric-controlled ball valve 7.

[0037] In the present invention, the ion filter 5 is used to purify fresh water and can remove various anions and cations in the cooling fresh water. It is arranged in parallel with the fresh water cooler 3. An electrically controlled ball valve 7 is provided at the inlet of the ion filter 5 to control the opening and closing of the system water purification. Water purification can be performed at any time during the operation of the system without affecting the normal use of the system.

[0038] Preferably, the submersible electronic equipment freshwater cooling system is equipped with two cooling pump groups 1, the inlets of the two cooling pump groups 1 are respectively connected to the return water main 20, and the outlets of the two cooling pump groups 1 are respectively connected to the outlet main 18. The inlet and outlet of the cooling pump groups 1 are connected through a pressure sampling pipeline 23, and the pressure sampling pipeline 23 is equipped with a differential pressure transmitter 13.

[0039] In the present invention, the cooling pump group 1 is designed with two, one for use and one for backup. The differential pressure transmitter 13 is used to monitor the head of the cooling pump group 11, and the pressure ports are connected to the inlet and outlet pipe sections of the cooling pump group 1 respectively.

[0040] Preferably, a fresh water accumulator 4 is also provided on the return water main pipe 20 .

[0041] In the present invention, the fresh water accumulator 4 is connected to the return water main 20 to stabilize the pipeline pressure and prevent the inlet of the cooling pump group 1 from being sucked empty.

[0042] The present invention also provides a flow distribution design method, a water purification structure design, and a heat exchange design method for a freshwater cooling system of a submersible electronic equipment.

[0043] A flow distribution design method for a freshwater cooling system for submersible electronic equipment is used to achieve freshwater flow distribution for water-cooled electronic and electrical equipment in various parts of a submersible, comprising the following steps:

[0044] Step 1: Divide the submersible electronic and electrical equipment into several zones based on the proximity principle according to their layout and characteristics, and perform zone flow control on the submersible electronic and electrical equipment;

[0045] Step 2: Based on the measured flow and resistance characteristics of the water-cooled electronic and electrical equipment pipeline (i.e., the branch pipeline 22), a throttling element 6 is configured to correct the flow resistance of all water-cooled electronic and electrical equipment pipelines in the same zone to be consistent (when the flow resistance of each water-cooled electronic and electrical equipment pipeline under the rated flow condition is consistent, the actual distributed flow rate of each water-cooled electronic and electrical equipment pipeline will be consistent with its respective rated flow rate; the rated flow rate of each water-cooled electronic and electrical equipment pipeline may be different). The specific method is as follows: the throttling element 6 is not configured on the water-cooled electronic and electrical equipment pipeline with the largest flow resistance, and the throttling element 6 is configured at the inlet of other water-cooled electronic and electrical equipment pipelines with smaller flow resistance, so as to correct the flow resistance to the maximum measured flow resistance of the zone;

[0046] Step three, detect the flow and resistance characteristic measurement data of each partition main pipe 21. Except for the partition with the largest flow resistance, configure a low-noise flow regulating valve 8 on other partition main pipes 21 with small flow resistance for fine adjustment of the partition flow. Specifically, adjust the cooling water flow of each partition main pipe 21 to the rated flow through the flow regulating valve 8. The actual distributed flow of the partition main pipe 21 with small flow resistance will be greater than the rated flow. It is necessary to increase the total resistance through the low-noise flow regulating valve 8 so that the actual flow is close to the rated flow.

[0047] A water purification method for a freshwater cooling system for submersible electronic equipment is described, designed to monitor and purify the system's water quality. The method involves a salinometer 12 monitoring the salinity of the freshwater within the heat source channel in real time and transmitting the measured salinity value to an external controller, which is configured with a salinity alarm limit. When the controller detects that the measured salinity value exceeds the alarm limit, it opens the ion filter 5 and the electrically controlled ball valve 7 to remove salt and purify the freshwater. After purification is complete, the inlet electrically controlled ball valve 7 closes. This water purification method enables on-demand purification.

[0048] A salinometer 12 is provided at the end of the outlet main pipe 18 of the cooling pump group 1 (i.e., within the heat source channel). The salinometer 12 is installed in the upstream direction, and the measuring range of the salinometer 12 is selected according to the salinity control limit so that the salinity of the fresh water can be monitored in real time. The ion filter 5 is designed based on the total volume of fresh water in the pipe and the filter element life of the ion filter 5. The flow resistance characteristics of the ion filter 5 should be similar to those of the fresh water cooler 3. The ion filter 5 is arranged in parallel with the fresh water cooler 3, and an electrically controlled ball valve 7 is provided at the inlet of the ion filter 5. The advantage is that water purification can be performed at any time during system operation without affecting the normal use of the system.

[0049] A heat exchange design method for a freshwater cooling system for submersible electronic equipment uses a freshwater cooler 3 and a heat pipe cooling device 2 as backup, which is beneficial for vibration and noise reduction during quiet underwater navigation. The heat exchange design method is as follows:

[0050] Calculate the heat load of all water-cooled electronic and electrical equipment under different operating conditions, and design the fresh water cooler 3 based on the cooling water flow, maximum total heat load, and maximum water supply temperature, so that the heat exchange capacity of the fresh water cooler 3 meets the cooling requirements of the system under all operating conditions, both on the surface and underwater;

[0051] Heat pipe cooling device 2 is designed based on the cooling water flow rate, total heat load during underwater quiet sailing, and maximum water supply temperature, ensuring that its heat transfer capacity meets the cooling requirements of the system during underwater quiet sailing. Heat pipe cooling device 2 utilizes passive heat pipe technology, eliminating the need for seawater cooling. Instead, it transfers freshwater heat overboard through a working fluid pipeline, facilitating vibration and noise reduction during underwater quiet sailing.

[0052] The fresh water cooler 3 and the heat pipe cooling device 2 are arranged in parallel. The fresh water cooler 3 provides a backup for the heat pipe cooling device 2. The heat exchange mode is determined according to the navigation conditions of the submarine. When sailing underwater, the heat pipe cooling device 2 is used to cool the fresh water of the fresh water cooling system of the electronic equipment. When the heat pipe cooling device 2 fails, the cooling is switched to the fresh water cooler 3. When sailing on the surface, the fresh water cooler 3 is switched to work.

[0053] In the present invention, the specific design of the cooler according to the cooling water flow rate, heat load and water supply temperature is a prior art and will not be described in detail here.

[0054] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A flow distribution design method for a freshwater cooling system for submersible electronic equipment, characterized in that: The following steps are involved: Step 1: Divide the submersible electronic and electrical equipment into several zones based on the proximity principle according to their layout and characteristics, and perform zone flow control on the submersible electronic and electrical equipment; Step 2: Based on the measured flow and resistance characteristics of the water-cooled electronic and electrical equipment pipelines, throttling elements are configured to correct the flow resistance of all water-cooled electronic and electrical equipment pipelines in the same zone to be consistent. Specifically, throttling elements are not configured on the water-cooled electronic and electrical equipment pipeline with the largest flow resistance, while throttling elements are configured at the inlets of other water-cooled electronic and electrical equipment pipelines with smaller flow resistances to correct the flow resistance to the maximum measured flow resistance in the zone. Step 3: Detect the flow and flow resistance characteristic measurement data of each partition main pipe. Except for the partition with the largest flow resistance, install low-noise flow control valves on the partition main pipes with small flow resistance; The submersible electronic equipment fresh water cooling system includes a cooling pump group, a heat pipe cooling device, an outlet main pipe, a water supply main pipe, several zone main pipes and a return water main pipe. The outlet of the cooling pump group is connected to the inlet of the outlet main pipe, the outlet of the outlet main pipe is connected to the heat source channel of the heat pipe cooling device, and the outlet of the heat source channel of the heat pipe cooling device is connected to the water supply main pipe; the water supply main pipe is connected to the inlets of multiple zone main pipes, each zone main pipe is connected to several branch pipes flowing through the water-cooled electronic and electrical equipment in the zone, the outlet of the branch pipes is connected to the return water main pipe, and the outlet of the return water main pipe is connected to the inlet of the cooling pump group; low-noise flow regulating valves are arranged on the zone main pipes outside the zone with the largest flow resistance; each branch pipe connected to the same zone main pipe is equipped with a throttling element on the branch pipe with small flow resistance; The inlet and outlet ends of the heat source channel are respectively communicated with the two ends of the fourth pipeline, and an ion filter and an electric-controlled ball valve are installed on the fourth pipeline.

2. The flow distribution design method for the fresh water cooling system of a submersible electronic equipment according to claim 1, characterized in that: The water supply main pipe is sequentially provided with a water supply temperature transmitter, a water supply pressure transmitter, a safety valve and a drain valve along the fluid flow direction.

3. The flow distribution design method for the fresh water cooling system of a submersible electronic equipment according to claim 1, characterized in that: The return water main pipe is provided with a return water temperature transmitter and a return water pressure transmitter in sequence along the fluid flow direction; the return water main pipe is connected to the water supply pipeline, and the water supply pipeline is provided with a water injection and supply valve.

4. The flow distribution design method for the fresh water cooling system of a submersible electronic equipment according to claim 1, characterized in that: The submersible electronic equipment fresh water cooling system is further provided with a fresh water cooler, which is arranged in parallel with the heat pipe cooling device, and the two share a heat source channel; a salinometer is installed in the heat source channel.

5. The flow distribution design method for the fresh water cooling system of a submersible electronic equipment according to claim 1, characterized in that: The submersible electronic equipment fresh water cooling system is equipped with two cooling pump groups, the inlets of the two cooling pump groups are respectively connected to the return water main pipe, and the outlets of the two cooling pump groups are respectively connected to the outlet main pipe.

6. The flow distribution design method for the fresh water cooling system of a submersible electronic equipment according to claim 1, characterized in that: The inlet and outlet of the cooling pump group are connected through a pressure-taking pipeline, and a differential pressure transmitter is arranged on the pressure-taking pipeline.

7. The flow distribution design method for the fresh water cooling system of a submersible electronic equipment according to claim 1, characterized in that: The return water main is also provided with a fresh water accumulator.

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