Skid-mounted ship low-temperature fresh water cooling device and system

Abstract

The invention provides a skid-mounted ship low-temperature fresh water cooling device and system. The skid-mounted ship low-temperature fresh water cooling device comprises a public base, a fresh water cooler, a fresh water pump, a water inlet main pipe and a water outlet main pipe. Wherein the fresh water cooler and the fresh water pump are respectively provided with a water inlet and a water outlet, and the water outlet of the fresh water cooler is connected with the water inlet of the fresh water pump through a pipeline; a cooler base is arranged at the bottom of the fresh water cooler, and the fresh water cooler is fixedly connected with the public base through the cooler base; a pump base is arranged at the bottom of the fresh water pump, and the fresh water pump is fixedly connected with the public base through the pump base; the fresh water cooler is connected with the water inlet main pipe and is used for receiving high-temperature fresh water for cooling ship equipment; the fresh water pump is connected with the water outlet main pipe and used for outputting low-temperature fresh water for cooling to the ship equipment. According to the technical scheme, all devices can be managed and monitored in a centralized mode, the utilization rate of the cabin space is increased, the operation risk of the devices is reduced, and daily maintenance and overhaul work is facilitated.

Description

Technical Field

[0001] This application relates to the field of shipbuilding, and more specifically, to a modularized low-temperature fresh water cooling device and system for ships. Background Art

[0002] During the operation of a ship, the low-temperature fresh water cooling system plays a crucial role. Many key devices on the ship, such as engines, generators, air compressors, and the main lubricating oil and intake systems, generate a large amount of heat during operation. If this heat cannot be dissipated in a timely and effective manner, it is likely to cause the devices to overheat, which in turn affects the performance and service life of the devices, and may even lead to device failures, threatening the navigation safety of the ship. The low-temperature fresh water cooling system circulates low-temperature fresh water to absorb and carry away the heat generated by the devices, providing a stable cooling environment for the ship's devices to ensure the safe and efficient operation of each device. In addition, the low-temperature fresh water cooling system can also avoid the corrosion problems caused by directly using seawater for cooling, extend the service life of the devices, and reduce the maintenance cost.

[0003] However, there are many problems in the existing low-temperature fresh water cooling systems for ships in practical applications. A common problem is that in traditional engine room layouts, the equipment positions of the low-temperature fresh water cooling system are scattered, and the pipeline distribution is complex. For example, in container ships, large devices such as low-temperature fresh water expansion tanks, central fresh water coolers, degassing cylinders, low-temperature fresh water cooling pumps, and dosing devices are scattered throughout the plate cooling room, and each device can only be installed as an embedded part during shipbuilding. This scattered layout requires each device to be independently equipped with a device base and pipeline support, greatly increasing the construction difficulty, construction cost, and construction period, and also causing unnecessary engine room space and pipe material waste. At the same time, the ship will face many challenges during subsequent construction. For example, during the equipment installation and commissioning stages, the equipment positions and pipeline connections usually need to be adjusted multiple times, and the scattered equipment and pipeline layout will seriously affect the construction progress. In addition, the scattered equipment and pipeline layout makes the electrical and instrument control components distributed in a scattered manner, resulting in problems such as inconvenient operation and difficult reading, which is not conducive to centralized management and monitoring, and brings great inconvenience to daily maintenance and repair. Summary of the Invention

[0004] The purpose of the embodiments of this application is to provide a modularized low-temperature fresh water cooling device and system for ships. The modularized low-temperature fresh water cooling device can centrally manage and monitor its own various devices, thereby improving the utilization rate of the engine room space, reducing the operation risk of the devices, and facilitating the carrying out of daily maintenance and repair work.

[0005] In a first aspect, the present application provides a skid-mounted low-temperature fresh water cooling device for ships, which includes a common base, a fresh water cooler, a fresh water pump, an inlet main pipe, and an outlet main pipe. Among them, both the fresh water cooler and the fresh water pump are provided with an inlet and an outlet. The outlet of the fresh water cooler and the inlet of the fresh water pump are connected by a pipeline; a cooler base is provided at the bottom of the fresh water cooler, and the fresh water cooler is fixedly connected to the common base through the cooler base; a pump base is provided at the bottom of the fresh water pump, and the fresh water pump is fixedly connected to the common base through the pump base; the fresh water cooler is connected to the inlet main pipe for receiving high-temperature fresh water that has completed the cooling of ship equipment; the fresh water pump is connected to the outlet main pipe for outputting low-temperature fresh water for cooling to ship equipment.

[0006] In an implementable solution, the bottom of the fresh water cooler is fixedly connected to the cooler base in a detachable manner, and the bottom of the fresh water pump is fixedly connected to the pump base in a detachable manner.

[0007] In an implementable solution, the cooler base and the pump base are respectively fixedly connected to the common base by welding.

[0008] In an implementable solution, a temperature control three-way valve and a temperature sensor are provided on the pipeline at the inlet of the fresh water cooler, and the temperature control three-way valve is also connected to the fresh water pump through a pipeline; during use, the water temperature at the inlet of the fresh water cooler is detected by the temperature sensor. When the water temperature is higher than the preset standard, the temperature control three-way valve connects the inlet main pipe and the fresh water cooler to allow fresh water to enter the fresh water cooler; when the water temperature is lower than the preset standard, the temperature control three-way valve connects the inlet main pipe and the fresh water pump to allow fresh water to bypass the fresh water cooler and directly enter the fresh water pump.

[0009] In an implementable solution, heat exchange tubes and a seawater chamber are provided in the fresh water cooler; during use, the heat exchange tubes are immersed in the seawater in the seawater chamber, and heat exchange occurs between the fresh water flowing through the heat exchange tubes and the seawater.

[0010] In an implementable solution, a degassing device is provided on the pipeline at the inlet of the fresh water pump for removing the gas in the fresh water flowing through the degassing device.

[0011] In an implementable solution, an expansion tank is provided on the pipeline between the fresh water cooler and the degassing device. An expansion chamber with a variable volume is provided inside the expansion tank to cope with the volume change of fresh water due to temperature change.

[0012] In an implementable solution, the skid-mounted low-temperature fresh water cooling device for ships further includes a chemical dosing device. The chemical dosing device is provided with a chemical outlet pipe and a return pipe. The chemical outlet pipe is connected to the pipeline at the inlet of the fresh water pump, and the return pipe is connected to the pipeline at the outlet of the fresh water pump.

[0013] In an implementable solution, the skid-mounted ship low-temperature fresh water cooling device further includes an operation platform, which provides space for operators to carry out various operations on the skid-mounted ship low-temperature fresh water cooling device.

[0014] In a second aspect, the present application also provides a skid-mounted ship low-temperature fresh water cooling system, including a skid-mounted ship low-temperature fresh water cooling device, and further including a circulating water pipe. One end of the circulating water pipe is connected to the outlet main pipe of the skid-mounted ship low-temperature fresh water cooling device, and the other end is connected to the inlet main pipe. One or more ship equipment coolers are arranged on the circulating water pipe for cooling the corresponding ship equipment when fresh water flows through the ship equipment coolers.

[0015] Compared with the prior art, the beneficial effects of the present application at least include:

[0016] The skid-mounted ship low-temperature fresh water cooling device of the present application arranges equipment such as fresh water coolers and fresh water pumps on the common base in an orderly manner through their respective equipment bases, realizing a compact skid-mounted design, thereby improving the utilization rate of the engine room space and effectively solving the problem of waste of pipe materials existing in the traditional decentralized layout method. After adopting the skid-mounted design, various equipment, common bases, and pipelines can be hoisted and installed outside the ship, thereby reducing the workload and difficulty of on-site construction, reducing the construction cost and shortening the construction period. At the same time, it can also reduce the quality problems caused by poor on-site construction conditions, better ensure the installation accuracy to improve the integrity and reliability of the system, thereby effectively improving the low-temperature fresh water cooling effect, preventing overheating of various ship equipment, and ensuring the normal operation of the ship. In addition, the centralized arrangement of various equipment is also convenient for centralized management and monitoring of all equipment, thereby reducing the operation risk of the equipment and facilitating the carrying out of daily maintenance and repair work. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, so they should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0018] Figure 1 Is a three-dimensional schematic diagram of the skid-mounted ship low-temperature fresh water cooling device shown according to the embodiments of the present application;

[0019] Figure 2 Is a structural schematic diagram of the skid-mounted ship low-temperature fresh water cooling device;

[0020] Figure 3 Is a front view of the fresh water pump of the skid-mounted ship low-temperature fresh water cooling device.

[0021] In the figure: 1. Common base; 2. Fresh water cooler; 3. Fresh water pump; 4. Inlet main pipe; 5. Outlet main pipe; 6. Degassing device; 7. Chemical dosing device; 8. Ship equipment to be cooled; 201. Cooler base; 202. Cooler inlet valve; 301. Pump base; 302. Pump strengthening fixing device; 401. Temperature control three-way valve; 402. Temperature sensor. Specific embodiments

[0022] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Components of the embodiments of the present application generally described and illustrated in the drawings here may be arranged and designed in a variety of different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the present application claimed, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts fall within the scope of protection of the present application.

[0024] As Figure 1 shown, the present application provides a skid-mounted ship low-temperature fresh water cooling device, including a common base 1, a fresh water cooler 2, a fresh water pump 3, an inlet main pipe 4 and an outlet main pipe 5. Among them, both the fresh water cooler 2 and the fresh water pump 3 are provided with an inlet and an outlet, and the outlet of the fresh water cooler 2 and the inlet of the fresh water pump 3 are connected by a pipeline. A cooler base 201 is provided at the bottom of the fresh water cooler 2, and the fresh water cooler 2 is fixedly connected to the common base 1 through the cooler base 201. A pump base 301 is provided at the bottom of the fresh water pump 3, and the fresh water pump 3 is fixedly connected to the common base 1 through the pump base 301. The fresh water cooler 2 is connected to the inlet main pipe 4 for receiving high-temperature fresh water that has completed the cooling of ship equipment. The fresh water pump 3 is connected to the outlet main pipe 5 for outputting low-temperature fresh water for cooling to the ship equipment 8 to be cooled.

[0025] In the skid-mounted ship low-temperature fresh water cooling device, a plurality of fresh water coolers 2 and a plurality of fresh water pumps 3 can be provided, as Figure 1 and Figure 2As shown, two fresh water coolers 2 and three fresh water pumps 3 can be set. Multiple fresh water coolers 2 can be connected in parallel in the skid-mounted ship low-temperature fresh water cooling device, and the fresh water from the inlet main pipe 4 is divided into multiple paths and enters each fresh water cooler 2 respectively. Similarly, multiple fresh water pumps 3 can be connected in parallel in the skid-mounted ship low-temperature fresh water cooling device. When in use, the high-temperature fresh water that has completed the cooling of the ship equipment first enters the skid-mounted ship low-temperature fresh water cooling device through the inlet main pipe 4 and reaches the fresh water cooler 2. If there are multiple parallel fresh water coolers 2, cooler inlet valves 202 can be set for each fresh water cooler 2 respectively. By adjusting each cooler inlet valve 202, the flow rate of the high-temperature fresh water entering different fresh water coolers 2 can be distributed. Or a dedicated flow distribution valve (not shown in the figure) can also be set and connected to each fresh water cooler 2 through pipelines respectively.

[0026] The bottom of the fresh water cooler 2 can be fixedly connected to the cooler base 201 in a detachable manner, and the bottom of the fresh water pump 3 can be fixedly connected to the pump base 301 in a detachable manner. Specifically, mechanical connection methods such as bolt connection, flange connection, and clamp connection can be adopted. In this way, when subsequent maintenance, repair, or replacement is required, the fresh water cooler 2 or the fresh water pump 3 can be conveniently disassembled from the skid-mounted ship low-temperature fresh water cooling device without the need to carry out large-scale disassembly of the entire device, thereby greatly improving the maintenance efficiency and operation convenience.

[0027] In addition, the cooler base 201 and the pump base 301 can be fixedly connected to the common base 1 by welding respectively. Through welding, the cooler base 201 and the pump base 301 form an integral structure with the common base 1, improving the stability of the entire cooling device, enabling the cooling device to better cope with various working conditions, and maintaining stable operation during the ship's navigation. As Figure 3 shown, since the fresh water pump 3 generates relatively large vibrations during operation, pump strengthening fixing devices 302 can be respectively set between each fresh water pump 3 and the corresponding pump base 301.

[0028] In addition to the fresh water coolers 2 and the fresh water pumps 3, other equipment can also be set in the skid-mounted ship low-temperature fresh water cooling device. For example, a seawater pump or a seawater filter can be installed and fixedly connected to the common base 1 through the corresponding filter base. Specifically, it can be expanded according to the situation and is not limited here.

[0029] The skid-mounted low-temperature fresh water cooling device of the present application centrally arranges equipment such as fresh water coolers and fresh water pumps on a common base in an orderly manner through their respective equipment bases, achieving a compact skid-mounted design, thereby improving the utilization rate of the engine room space and effectively solving the problem of pipe material waste existing in the traditional decentralized layout method. After adopting the skid-mounted design, various equipment, common bases, and pipelines can be hoisted and installed outside the ship, thereby reducing the workload and difficulty of on-site construction, reducing the construction cost and shortening the construction period. At the same time, it can also reduce the quality problems caused by poor on-site construction conditions, better ensure the installation accuracy to improve the integrity and reliability of the system, thereby effectively improving the low-temperature fresh water cooling effect, preventing overheating of various ship equipment, and ensuring the normal operation of the ship. In addition, the centralized arrangement of various equipment is also convenient for centralized management and monitoring of all equipment, thereby reducing the equipment operation risk and facilitating the carrying out of daily maintenance and repair work.

[0030] In one embodiment, as Figure 2 shown, a temperature control three-way valve 401 and a temperature sensor 402 are arranged on the pipeline at the water inlet of the fresh water cooler 2. The temperature control three-way valve 401 is also connected to the fresh water pump 3 through a pipeline, that is, the temperature control three-way valve 401 is respectively connected to the fresh water cooler 2, the inlet main pipe 4, and the fresh water pump 3. When in use, the water temperature at the water inlet of the fresh water cooler 2 is detected by the temperature sensor 402. When the water temperature is higher than the preset standard, the temperature control three-way valve 401 connects the inlet main pipe 4 and the fresh water cooler 2, so that fresh water enters the fresh water cooler 2. When the water temperature is lower than the preset standard, for example, when the overall operating load of the ship is low and excessive cooling is not required, the temperature control three-way valve 401 connects the inlet main pipe 4 and the fresh water pump 3, so that fresh water bypasses the fresh water cooler 2 and directly enters the fresh water pump 3. This can avoid unnecessary cooling processes, save energy, and at the same time ensure that the temperature of the fresh water remains within a suitable range to meet the cooling requirements of ship equipment.

[0031] In one embodiment, heat exchange tubes and a seawater chamber are arranged in the fresh water cooler 2. When in use, the heat exchange tubes are immersed in the seawater in the seawater chamber, and heat exchange occurs between the fresh water flowing through the heat exchange tubes and the seawater. Specifically, the heat exchange area of the fresh water can be increased by extending the length of the heat exchange tubes (for example, using U-shaped tubes), adopting a special cross-sectional shape of the heat exchange tubes (for example, the cross-section of the heat exchange tubes is strip-shaped), etc., thereby improving the cooling efficiency of the fresh water. In addition, the seawater flow can be accelerated by setting a seawater pump, etc., and the high-temperature seawater can be discharged in time, so that the seawater temperature in the seawater chamber always remains at a low level, thereby further improving the fresh water cooling efficiency. This heat exchange method makes full use of seawater for heat dissipation, effectively improves the cooling efficiency and reduces the cooling cost.

[0032] In one embodiment, as Figure 1 and Figure 2As shown, an air removal device 6 is provided on the pipeline at the water inlet of the fresh water pump 3 to remove the gas in the fresh water flowing through the air removal device 6. During the operation of the skid-mounted marine low-temperature fresh water cooling device, gas may be generated. The accumulation of bubbles may insulate the heat, resulting in local overheating. Moreover, when the bubbles burst in the liquid, local high pressure will be generated, increasing the flow resistance of the cooling water, thereby reducing the cooling efficiency and even causing the failure of the cooling device. Therefore, an air removal device 6 can be provided to remove these gases to ensure that only liquid flows inside the cooling device and keep the cooling device running normally. Specifically, the air removal device 6 can adopt one or a combination of a vacuum air removal device, a centrifugal air removal device, and a mechanical stirring air removal device, which is not limited here.

[0033] In addition, an expansion tank (not shown in the figure) can also be provided on the pipeline between the fresh water cooler 2 and the air removal device 6. A variable-volume expansion chamber is provided inside the expansion tank. After the fresh water flows through each marine equipment that needs to be cooled, the temperature will increase significantly, and then the volume will expand. The main function of the expansion tank is to allow the fresh water to have room for expansion after being heated by changing its own volume. In addition, it can also supplement the water lost due to evaporation and leakage in the system. Specifically, since the expansion tank may occupy a large space and is not convenient to be installed on the common base 1, the expansion tank can be led out to the outside of the skid-mounted marine low-temperature fresh water cooling device for installation. Preferably, the expansion tank is arranged near the common base 1 to reduce the consumption of pipes and lower the installation complexity. The air removal device 6 and the expansion tank are connected by a pipeline. On the one hand, it can ensure that the gas in the entire skid-mounted marine low-temperature fresh water cooling device can be safely discharged. At the same time, the expansion tank can also supply water to the air removal device 6 to ensure that there is sufficient cooling water in the air removal device 6.

[0034] In one embodiment, as Figure 1 and Figure 2 shown, the skid-mounted marine low-temperature fresh water cooling device may further include a dosing device 7. The dosing device 7 is provided with a medicine outlet pipe and a reflux pipe. Among them, the medicine outlet pipe is connected to the pipeline at the water inlet of the fresh water pump 3, and the reflux pipe is connected to the pipeline at the water outlet of the fresh water pump 3. During the actual navigation of the ship, due to the limited fresh water resources, the fresh water used for cooling is usually recycled for a long time. Therefore, it is easy to deteriorate, which may cause corrosion to the fresh water cooler 2, the fresh water pump 3, and each pipeline, shorten the equipment life, reduce the overall cooling efficiency, and even seriously affect the navigation safety of the ship in severe cases. In order to cope with the problem of fresh water deterioration, a dosing device 7 can be set for the skid-mounted marine low-temperature fresh water cooling device to automatically or manually add medicines for purifying the water quality to the fresh water.

[0035] When the ship is in operation, the medicament in the dosing device 7 flows out from the medicine outlet pipe and flows into the fresh water pump 3 through the water inlet of the fresh water pump 3, so as to be fully mixed with the cooling fresh water. A part of the mixed water flow flows back into the dosing device 7 through the return pipe, pushing the newly added medicament to flow out from the medicine outlet pipe, thus forming a cycle and realizing continuous dosing. Stop check valves can be respectively arranged on the medicine outlet pipe and the return pipe to ensure the correct flow direction of the medicament and prevent the medicament from flowing back. In actual layout, the dosing device 7 and the fresh water pump 3 can be arranged in parallel. In addition, a drain valve can be arranged on the dosing device to discharge the medicament to the outside of the ship or a special waste water tank when needed.

[0036] In one embodiment, the skid-mounted ship low-temperature fresh water cooling device may further include an operating platform, and the operating platform provides a space for operators to carry out various operations on the skid-mounted ship low-temperature fresh water cooling device. After setting up the operating platform, the crew can perform daily operations, maintenance and repair work on key equipment such as the fresh water cooler 2, the fresh water pump 3, the degassing device 6, and the dosing device 7 in a stable and safe environment. For example, the operator can easily check the operating status of the equipment, replace components, add medicament or perform other necessary maintenance operations on the operating platform. The operating platform can also be equipped with necessary auxiliary facilities (such as a straight ladder), as well as safety facilities such as guardrails and non-slip floors. In addition, multiple dedicated operating areas can be set on the operating platform to meet the operating requirements of different equipment, further improving work efficiency and operating flexibility.

[0037] As Figure 2 shown, the present application also provides a skid-mounted ship low-temperature fresh water cooling system, which is characterized in that it includes a skid-mounted ship low-temperature fresh water cooling device and also includes a circulating water pipe. Wherein, one end of the circulating water pipe is connected to the water outlet main pipe 5 of the skid-mounted ship low-temperature fresh water cooling device, and the other end is connected to the water inlet main pipe 4. One or more ship equipment coolers (not shown in the figure) are arranged on the circulating water pipe to cool the corresponding ship equipment when the fresh water flows through the ship equipment cooler.

[0038] This design enables the entire cooling system to form a closed loop. Low-temperature fresh water flows out from the low-temperature outlet main pipe 5 and is transported through the circulating water pipes to each ship equipment cooler. After absorbing the heat generated during the operation of the equipment, it becomes high-temperature fresh water. Subsequently, the high-temperature fresh water returns to the modular ship low-temperature fresh water cooling device through the high-temperature inlet main pipe 4 and is cooled again by the fresh water cooler 2, thus realizing the recycling of fresh water. By setting multiple ship equipment coolers on the circulating water pipes, the cooling requirements of different equipment on the ship can be met, such as engines, generators, air compressors, and the main lubrication and intake systems, etc. This centralized cooling system not only improves the cooling efficiency but also reduces the floor area of the cooling equipment and optimizes the space layout of the ship's engine room. By reasonably arranging the circulating water pipes and ship equipment coolers, the flexibility and reliability of the system can be further improved to ensure that the ship equipment always maintains a good cooling state during operation.

[0039] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A skid-mounted low-temperature fresh water cooling device for ships, characterized in that, Comprising: A common base; A fresh water cooler and a fresh water pump, both the fresh water cooler and the fresh water pump are provided with water inlets and water outlets, and the water outlet of the fresh water cooler and the water inlet of the fresh water pump are connected by a pipeline; a cooler base is arranged at the bottom of the fresh water cooler, and the fresh water cooler is fixedly connected to the common base through the cooler base; a pump base is arranged at the bottom of the fresh water pump, and the fresh water pump is fixedly connected to the common base through the pump base; A water inlet main pipe and a water outlet main pipe, the fresh water cooler is connected to the water inlet main pipe for receiving high-temperature fresh water that has completed the cooling of ship equipment; the fresh water pump is connected to the water outlet main pipe for outputting low-temperature fresh water for cooling to ship equipment.

2. The skid-mounted low-temperature fresh water cooling device for ships according to claim 1, characterized in that, The bottom of the fresh water cooler is fixedly connected to the cooler base in a detachable manner, and the bottom of the fresh water pump is fixedly connected to the pump base in a detachable manner.

3. The skid-mounted low-temperature fresh water cooling device for ships according to claim 1, characterized in that, The cooler base and the pump base are respectively fixedly connected to the common base by welding.

4. The skid-mounted low-temperature fresh water cooling device for ships according to claim 1, characterized in that, A temperature control three-way valve and a temperature sensor are arranged on the pipeline at the water inlet of the fresh water cooler, and the temperature control three-way valve is also connected to the fresh water pump through a pipeline; During use, the temperature of the water at the water inlet of the fresh water cooler is detected by the temperature sensor. When the water temperature is higher than the preset standard, the temperature control three-way valve connects the water inlet main pipe and the fresh water cooler to allow fresh water to enter the fresh water cooler; When the water temperature is lower than the preset standard, the temperature control three-way valve connects the water inlet main pipe and the fresh water pump to allow fresh water to bypass the fresh water cooler and directly enter the fresh water pump.

5. The skid-mounted low-temperature fresh water cooling device for ships according to claim 1, characterized in that, Heat exchange tubes and a seawater chamber are arranged in the fresh water cooler; during use, the heat exchange tubes are immersed in the seawater in the seawater chamber, and heat exchange occurs between the fresh water flowing through the heat exchange tubes and the seawater.

6. The skid-mounted low-temperature fresh water cooling device for ships according to claim 1, wherein, An air removal device is arranged on the pipeline at the water inlet of the fresh water pump for removing the gas in the fresh water flowing through the air removal device.

7. The skid-mounted low-temperature fresh water cooling device for ships according to claim 6, characterized in that, An expansion tank is arranged on the pipeline between the fresh water cooler and the air removal device, and a variable-volume expansion chamber is arranged inside the expansion tank for coping with the volume change of fresh water due to temperature change.

8. The skid-mounted low-temperature fresh water cooling device for ships according to claim 1, characterized in that It further includes a chemical dosing device, the chemical dosing device is provided with a chemical outlet pipe and a return pipe, the chemical outlet pipe is connected to the pipeline at the water inlet of the fresh water pump, and the return pipe is connected to the pipeline at the water outlet of the fresh water pump.

9. The skid-mounted low-temperature fresh water cooling device for ships according to claim 1, characterized in that, It further includes an operation platform, and the operation platform provides space for operators to carry out various operations on the skid-mounted ship low-temperature fresh water cooling device.

10. A skid-mounted low-temperature fresh water cooling system for ships, characterized in that, Comprising the skid-mounted ship low-temperature fresh water cooling device according to any one of claims 1-9, it further includes a circulating water pipe, one end of the circulating water pipe is connected to the water outlet main pipe of the skid-mounted ship low-temperature fresh water cooling device, and the other end is connected to the water inlet main pipe; One or more ship equipment coolers are arranged on the circulating water pipe for cooling the corresponding ship equipment when fresh water flows through the ship equipment coolers.

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