Offshore wind power on-site absorption system based on ice slurry cold storage

Abstract

The invention belongs to the technical field of wind power application, and particularly discloses an offshore wind power on-site consumption system based on flow ice slurry cold storage, seawater ice slurry is used as a cold storage medium, the generating capacity of an offshore wind turbine generator is converted into cold capacity through a refrigerating unit, and then the cold capacity is stored in the form of ice slurry and finally supplied to past fishing boats for use or transportation. And a set of efficient wind power on-site consumption system for electricity utilization, refrigeration, cold storage and cold utilization is formed. Refrigeration service can be provided for deep and far sea facilities, local consumption and efficient utilization of deep and far sea wind power are achieved, the problems that deep and far sea wind power integration is difficult and the wind curtailment rate is high are solved, and meanwhile stable cold energy supply is provided for the deep and far sea facilities. On one hand, the investment and operation cost of the fishing boat can be reduced, on the other hand, deep and far sea wind power can be independently consumed, cables do not need to be built, high construction and maintenance cost is reduced, the loss of stored cold energy is small, and the storage efficiency is high.

Description

Technical Field

[0001] The present invention belongs to the technical field of wind power application, and in particular relates to an offshore wind power local consumption system based on fluidized ice slurry cold storage. Background Art

[0002] As the global demand for clean energy continues to increase, deep-sea wind power, as a renewable form of clean energy, has received more and more attention. Compared with onshore wind power, offshore wind energy resources are more abundant and stable, with higher power generation efficiency. In addition, deep-sea wind power stations are built far away from densely populated areas such as coastal residential areas, which is more friendly to the environment of the nearby coastline and more environmentally friendly. Therefore, deep-sea wind power technology can effectively reduce the limitations of onshore wind power resources and has broad development prospects. However, due to the special environmental conditions and construction difficulties of deep-sea wind power, its construction cost and operating cost are relatively high, which directly affects its application scope and economic benefits.

[0003] At present, the main way to utilize deep-sea wind power is to transmit the electricity generated by the generator set to the nearest onshore power grid through cables, but this technical route has certain limitations. On the one hand, the deep-sea area is far away from the land, and transmitting electricity to the land requires the construction of a large number of cables and related supporting facilities, which has extremely high construction and maintenance costs; on the other hand, large-scale deep-sea wind power has the characteristics of randomness, fluctuation, probability distribution, and reverse peak regulation, which greatly restricts the transmission and consumption of wind power. Faced with the limitations brought by the long-distance transmission of offshore wind power, the current solutions for consuming offshore wind power on site inevitably lay cables and pipelines to connect with the onshore power grid or water network, and cannot independently and completely consume wind power, which leads to high construction and maintenance costs.

[0004] With the rapid development of deep-sea fishing and marine ranching technologies, the technology of cold storage and ice slurry (0℃ ice-water mixture) presents broad application prospects: First, as a highly perishable food, fish must be refrigerated immediately after being caught, while flake ice has poor heat exchange effect and hard texture, slow cooling speed and easy to scratch the fish and accelerate decay, while ice slurry has good heat exchange and flow characteristics, can fully contact the surface of the catch, evenly and quickly reduce it to the refrigeration temperature, minimize damage, and extend the shelf life of seafood. Secondly, ice slurry has a high energy storage density, with latent heat of up to 334kJ / kg, and can be used as an excellent cold storage medium. At the same time, seawater ice slurry is not easy to agglomerate, and is easier to transport and pump. In addition, equipping fishing vessels with ice makers requires a certain amount of initial investment and operating costs, and the equipment and fuel occupy a certain space, which reduces the size of the fish tank.

[0005] If the deep sea wind power can be consumed locally to produce ice slurry and provide it to distant-water fishing vessels for refrigerating seafood, it can reduce the investment and operation costs of fishing vessels on the one hand, and independently consume the deep sea wind power on the other hand, without the need to build cables, thus reducing the high construction and maintenance costs. However, there is currently no such effective on-site consumption system for offshore wind power. Summary of the invention

[0006] The purpose of the present invention is to provide an offshore wind power on-site consumption system based on fluidized ice slurry cold storage, so as to solve the above-mentioned problems existing in the prior art.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions: The present invention provides an offshore wind power local consumption system based on fluidized ice slurry cold storage, comprising a seawater supply subsystem, a refrigeration cycle subsystem, a supercooled water circulation subsystem, an ice slurry production subsystem, an ice slurry transportation subsystem and an ice slurry melting subsystem; the seawater supply subsystem is used to provide purified seawater to the refrigeration cycle subsystem and the ice slurry transportation subsystem; the refrigeration cycle subsystem is used to access the power supply of the wind turbine generator set for operation, and use the purified seawater to generate refrigerant; the ice slurry transportation subsystem is used to store ice slurry, and add purified seawater to the stored ice slurry to output ice slurry; the ice slurry production subsystem is used to use the refrigerant to cool ice water into supercooled water, promote crystallization of the supercooled water, obtain ice slurry, transfer the ice slurry to the ice slurry transportation subsystem for storage, and recycle the ice slurry of the ice slurry transportation subsystem to extract ice water; the ice slurry melting subsystem is used to transfer the cold amount of the ice slurry output by the ice slurry transportation subsystem to the cold end.

[0008] In one possible design, the seawater supply subsystem includes a seawater purification device, a seawater pump, a seawater pool and a cooling water pump. The seawater purification device is used to input seawater for purification and output purified seawater. The seawater pump is used to pump the purified seawater output by the seawater purification device into the seawater pool for cooling and storage. The cooling water pump is used to pump the purified seawater stored in the seawater pool into a water supply pipeline, and output the purified seawater through the water supply pipeline.

[0009] In one possible design, the refrigeration cycle subsystem includes a refrigeration main unit, which includes a compressor, a condenser, a throttle valve and an evaporator. A first refrigerant circulation pipeline and a second refrigerant circulation pipeline are connected between the condenser and the evaporator. The compressor is arranged on the first refrigerant circulation pipeline, and the compressor is connected to the power supply of the wind turbine generator set. The throttle valve is arranged on the second refrigerant circulation pipeline. The water inlet of the condenser is connected to a water supply pipeline for introducing purified seawater. The return water outlet of the condenser is connected to a return water pipeline for outputting return water. The return water pipeline is connected to a seawater pool for discharging return water into the seawater pool.

[0010] In one possible design, the refrigerant of the refrigeration main unit is ethylene glycol, and the supercooled water circulation subsystem includes an ethylene glycol circulation pump and a supercooled water plate heat exchanger. The ethylene glycol circulation pump is used to draw the refrigerant of the evaporator into the first heat exchange channel of the supercooled water plate heat exchanger, and return the refrigerant to the evaporator via the first heat exchange channel. The second heat exchange channel of the supercooled water plate heat exchanger is connected to the ice slurry preparation subsystem, which is used to introduce ice water from the ice slurry preparation subsystem, and exchange heat between the ice water and the refrigerant in the first heat exchange channel to obtain supercooled water, and return the supercooled water to the ice slurry preparation subsystem.

[0011] In one possible design, the ice slurry preparation subsystem includes a crystal promoter, an ice making pump and an ice crystal filter. The ice making pump is used to extract ice slurry from the ice slurry transport subsystem and transport the ice slurry to the ice crystal filter. The ice crystal filter is used to filter the ice slurry extracted by the ice making pump, and output the ice water obtained after filtering the ice crystals to the second heat exchange channel of the supercooled water plate heat exchanger for heat exchange. The crystal promoter is used to crystallize the supercooled water output from the second heat exchange channel of the supercooled water plate heat exchanger to obtain ice slurry, and then transmit the ice slurry to the ice slurry transport subsystem.

[0012] In one possible design, the ice slurry production subsystem also includes an ice crystal preheater, and the first preheating channel of the ice crystal preheater is respectively connected to the return water pipe and the water supply pipe, and is used to introduce return water from the return water pipe for precooling treatment to obtain precooled purified seawater, and return the precooled purified seawater to the water supply pipe. The second preheating channel of the ice crystal preheater is respectively connected to both ends of the ice making pump, and is used to introduce ice slurry from the ice slurry transportation subsystem, and exchange heat between the ice slurry and the return water in the first preheating channel, and transport the ice water obtained after the heat exchange to the ice crystal filter.

[0013] In one possible design, the ice slurry conveying subsystem includes an ice storage tank, which is used to store the ice slurry conveyed by the crystal promoter, and a water replenishment pipe is connected to the top of the ice storage tank, and an ice slurry conveying pipe is provided at the bottom. The water replenishment pipe is connected to the water supply pipe and is used to replenish the purified seawater in the water supply pipe into the ice slurry in the ice storage tank, and the ice slurry conveying pipe is used to output the ice slurry in the ice storage tank.

[0014] In one possible design, the ice slurry melting subsystem includes an ice melting pump, an ice melting plate heat exchanger and a cold end pump. The ice melting pump is used to pump the ice slurry output from the ice slurry delivery pipeline to the first heat exchange channel of the ice melting plate heat exchanger, and the cold end pump is used to pump the cold water at the cold end to the second heat exchange channel of the ice melting plate heat exchanger. The ice slurry in the first heat exchange channel of the ice melting plate heat exchanger exchanges heat with the cold water in the second heat exchange channel. After heat exchange, the first heat exchange channel of the ice melting plate heat exchanger obtains purified seawater, and the purified seawater is output to the water replenishment pipeline. After heat exchange, the second heat exchange channel of the ice melting plate heat exchanger obtains cold ice slurry, and the cold ice slurry is output to the cold end.

[0015] In a possible design, the ice slurry melting subsystem includes a cold end pump, and the cold end pump is used to pump the ice slurry output from the ice slurry conveying pipeline to the cold end.

[0016] In a possible design, the seawater pool is provided with a temperature sensor and is connected to a drainage pipe.

[0017] Beneficial effects: The present invention uses seawater ice slurry as a cold storage medium, converts the power generation of offshore wind turbines into cold through a refrigeration unit, and then stores the cold in the form of ice slurry, and finally supplies it to passing fishing boats for use or transportation, forming a set of efficient wind power on-site consumption system of electricity use-refrigeration-cold storage-cold use. The present invention uses seawater as raw material, so that the raw material source is abundant, easy to obtain, and low in cost, and the energy efficiency of the system can be improved. The present invention can convert the excess electric energy of offshore wind power facilities into ice slurry storage, and release it through the cold storage system to provide refrigeration services for deep-sea facilities, realizing the on-site consumption and efficient utilization of deep-sea wind power, solving the problems of difficult grid connection and high wind abandonment rate of deep-sea wind power, and providing a stable supply of cold energy for deep-sea facilities. The present invention uses offshore wind power to make ice slurry for storage and supplies it to distant-sea fishing vessels to refrigerate seafood. On the one hand, it can reduce the investment and operating costs of fishing vessels, and on the other hand, it can independently consume deep-sea wind power without the need to build cables, reducing high construction and maintenance costs, and has less storage cold loss and high storage efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the system structure provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0020] It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. The specific structures and functional details disclosed herein are only used to describe the exemplary embodiments of the present invention. However, the present invention can be embodied in many alternative forms, and it should not be understood that the present invention is limited to the embodiments set forth herein.

[0021] It should be understood that, unless otherwise clearly specified and limited, the corresponding terms should be understood in a broad sense, for example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be an electrical connection, a direct connection, an indirect connection through an intermediate medium, or the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments can be understood according to specific circumstances.

[0022] In the following description, certain details are provided to facilitate a complete understanding of the example embodiments. However, it will be appreciated by those of ordinary skill in the art that the example embodiments may be implemented without these certain details. For example, the system may be shown in a block diagram to avoid obscuring the example with unnecessary details. In other embodiments, well-known processes, structures, and techniques may not be shown in unnecessary detail to avoid obscuring the embodiments.

[0023] Example: This embodiment provides an offshore wind power local consumption system based on fluidized ice slurry cold storage, such as Figure 1 As shown, it includes a seawater supply subsystem, a refrigeration cycle subsystem, a supercooled water circulation subsystem, an ice slurry production subsystem, an ice slurry transportation subsystem and an ice slurry melting subsystem; the seawater supply subsystem is used to provide purified seawater to the refrigeration cycle subsystem and the ice slurry transportation subsystem; the refrigeration cycle subsystem is used to access the power supply of the wind turbine generator set for operation, and use the purified seawater to generate refrigerant; the ice slurry transportation subsystem is used to store ice slurry, and add purified seawater to the stored ice slurry to output ice slurry; the ice slurry production subsystem is used to use the refrigerant to cool ice water into supercooled water, and promote crystallization of the supercooled water to obtain ice slurry, transfer the ice slurry to the ice slurry transportation subsystem for storage, and recycle the ice slurry of the ice slurry transportation subsystem to extract ice water; the ice slurry melting subsystem is used to transfer the cold of the ice slurry output by the ice slurry transportation subsystem to the cold end.

[0024] The seawater supply subsystem includes a seawater purification device, a seawater pump, a seawater pool and a cooling water pump. The seawater purification device is used to input seawater for purification and output purified seawater. The seawater pump is used to pump the purified seawater output by the seawater purification device into the seawater pool for cooling and storage. The cooling water pump is used to pump the purified seawater stored in the seawater pool into a water supply pipeline and output the purified seawater through the water supply pipeline. The seawater pool is provided with a temperature sensor, and the seawater pool is connected to a drainage pipeline.

[0025] The refrigeration cycle subsystem includes a refrigeration main unit, which includes a compressor, a condenser, a throttle valve and an evaporator. A first refrigerant circulation pipeline and a second refrigerant circulation pipeline are connected between the condenser and the evaporator. The compressor is arranged on the first refrigerant circulation pipeline, and the compressor is connected to the power supply of the wind turbine generator set. The throttle valve is arranged on the second refrigerant circulation pipeline. The water inlet of the condenser is connected to a water supply pipeline for introducing purified seawater. The return water outlet of the condenser is connected to a return water pipeline for outputting return water. The return water pipeline is connected to a seawater pool for discharging return water into the seawater pool.

[0026] The refrigerant of the refrigeration main unit is ethylene glycol, and the supercooled water circulation subsystem includes an ethylene glycol circulation pump and a supercooled water plate heat exchanger. The ethylene glycol circulation pump is used to draw the refrigerant of the evaporator into the first heat exchange channel of the supercooled water plate heat exchanger, and return the refrigerant to the evaporator via the first heat exchange channel. The second heat exchange channel of the supercooled water plate heat exchanger is connected to the ice slurry preparation subsystem, which is used to introduce ice water from the ice slurry preparation subsystem, and exchange heat between the ice water and the refrigerant in the first heat exchange channel to obtain supercooled water, and return the supercooled water to the ice slurry preparation subsystem.

[0027] The ice slurry preparation subsystem includes a crystal promoter, an ice-making pump and an ice crystal filter. The ice-making pump is used to extract ice slurry from the ice slurry transportation subsystem and transport the ice slurry to the ice crystal filter. The ice crystal filter is used to filter the ice slurry extracted by the ice-making pump for ice crystals, and output the ice water obtained after filtering the ice crystals to the second heat exchange channel of the supercooled water plate heat exchanger for heat exchange. The crystal promoter is used to promote crystallization of the supercooled water output from the second heat exchange channel of the supercooled water plate heat exchanger to obtain ice slurry, and then transmit the ice slurry to the ice slurry transportation subsystem.

[0028] The ice slurry production subsystem also includes an ice crystal preheater, wherein the first preheating channel of the ice crystal preheater is respectively connected to the return water pipeline and the water supply pipeline, and is used to introduce return water from the return water pipeline for precooling treatment to obtain precooled purified seawater, and return the precooled purified seawater to the water supply pipeline; the second preheating channel of the ice crystal preheater is respectively connected to both ends of the ice making pump, and is used to introduce ice slurry of the ice slurry transportation subsystem, and exchange heat between the ice slurry and the return water in the first preheating channel, and transport the ice water obtained after the heat exchange to the ice crystal filter.

[0029] The ice slurry conveying subsystem includes an ice storage tank, which is used to store the ice slurry conveyed by the crystal promoter, and a water replenishment pipe is connected to the top of the ice storage tank, and an ice slurry conveying pipe is provided at the bottom. The water replenishment pipe is connected to the water supply pipe and is used to replenish the purified seawater in the water supply pipe into the ice slurry in the ice storage tank. The ice slurry conveying pipe is used to output the ice slurry in the ice storage tank.

[0030] The ice slurry melting subsystem includes an ice melting pump, an ice melting plate heat exchanger and a cold end pump, wherein the ice melting pump is used to pump the ice slurry output from the ice slurry delivery pipeline to the first heat exchange channel of the ice melting plate heat exchanger, and the cold end pump is used to pump the cold water at the cold end to the second heat exchange channel of the ice melting plate heat exchanger, and the ice slurry in the first heat exchange channel of the ice melting plate heat exchanger exchanges heat with the cold water in the second heat exchange channel, and the first heat exchange channel of the ice melting plate heat exchanger obtains purified seawater after heat exchange, and the purified seawater is output to the water supply pipeline, and the second heat exchange channel of the ice melting plate heat exchanger obtains cold ice slurry after heat exchange, and the cold ice slurry is output to the cold end. Alternatively, the ice slurry melting subsystem only includes a cold end pump, and the cold end pump is used to pump the ice slurry output from the ice slurry delivery pipeline to the cold end.

[0031] In specific implementation, the seawater purification device can introduce seawater from the seawater inlet for purification and output the purified seawater. The seawater pump pumps the purified seawater output by the seawater purification device into the seawater pool for cooling and storage. The cooling water pump is used to pump the purified seawater stored in the seawater pool into the water supply pipeline, and output the purified seawater through the water supply pipeline. In addition, a temperature sensor is provided in the seawater pool, and the seawater pool is connected to a drainage pipeline. When the temperature of the purified seawater in the seawater pool is higher than the set temperature, the drainage pipeline can be used to discharge the purified seawater in the seawater pool to the seawater outlet. Each pipeline can be provided with a corresponding valve for water flow control.

[0032] The compressor of the refrigeration host can be connected to the power supply of the wind turbine generator set to work, suck in the low-temperature and low-pressure refrigerant, compress it into a high-temperature and high-pressure gas, and then transport it to the condenser. After the high-temperature and high-pressure refrigerant gas enters the condenser, the condenser introduces the cooling and purified seawater output by the water supply pipeline to cool and dissipate the high-temperature and high-pressure refrigerant, so that the high-temperature and high-pressure refrigerant is cooled into a liquid refrigerant (liquid refrigerant), and the liquid refrigerant is then converted into a low-pressure liquid refrigerant through a throttle valve and transmitted to the evaporator. The liquid refrigerant entering the evaporator evaporates and absorbs the surrounding heat to achieve a refrigeration effect. The refrigerant can be ethylene glycol. At the same time, the return water port of the condenser is connected to a return water pipe, which is used to output the return water of the condenser, and the return water pipe is connected to the seawater pool, and the return water can be discharged into the seawater pool for cooling and recycling.

[0033] The ethylene glycol circulation pump draws the refrigerant of the evaporator into the first heat exchange channel of the supercooled water plate heat exchanger, and returns the refrigerant to the evaporator through the first heat exchange channel for circulating refrigeration. At the same time, the second heat exchange channel of the supercooled water plate heat exchanger is connected to the ice crystal filter, and ice water (0℃ water) can be introduced from the ice crystal filter, and the ice water is heat exchanged with the refrigerant in the first heat exchange channel to obtain supercooled water, which is then transported to the crystal promoter. The crystal promoter promotes crystallization of the supercooled water to obtain ice slurry (a 0℃ ice-water mixture containing a certain proportion of granular solid ice), and the ice slurry is output to the ice storage tank for storage.

[0034] The ice storage tank is used to store the prepared ice slurry. The ice slurry forms a natural stratification state in the ice storage tank, with ice sand on the top and 0℃ water on the bottom due to the density difference. The top of the ice storage tank is connected to a water supply pipe, which is used to replenish the purified seawater output from the water supply pipe into the ice storage tank (melting ice return water nozzles can be set to melt ice and replenish water), so that the ice sand on the top of the ice storage tank is gradually melted dynamically to ensure that the ice slurry is always stored in the ice storage tank, so that the ice slurry can be pumped out to prevent the ice storage tank from freezing completely. When the ice storage tank is full of ice slurry, the ice slurry conveying pipe at the bottom of the ice storage tank will discharge the ice slurry in the ice storage tank for use. When the ice storage tank is not full of ice slurry, the cold water / part of the ice crystals in the lower layer are discharged through the ice slurry conveying pipe and can be used for circulating ice making.

[0035] During the cyclic ice-making process, the ice-making pump draws the cold water / ice discharged from the ice slurry delivery pipeline and delivers it to the ice crystal filter. The ice crystal filter filters the ice crystals on the material delivered by the ice-making pump, and outputs the ice water obtained after filtering the ice crystals to the second heat exchange channel of the supercooled water plate heat exchanger for heat exchange to obtain supercooled water. The supercooled water is then crystallized by the crystal promoter to generate ice slurry, thereby realizing cyclic ice-making and gradually filling the ice storage tank with ice slurry. The entire cyclic ice-making process needs to be supported by the compressor of the refrigeration host to absorb the power supply of the wind turbine.

[0036] Moreover, during the cyclic ice-making process, the first preheating channel of the ice crystal preheater can introduce the return water of the condenser from the return water pipeline for precooling to obtain precooled purified seawater, and then return the precooled purified seawater to the water supply pipeline to mix with the seawater drawn from the seawater pool and provide it to the condenser and the water supply pipeline for cyclic use, thereby achieving the purpose of improving the energy efficiency of the system. The second preheating channel of the ice crystal preheater introduces the ice water / ice slurry output from the ice slurry delivery pipeline, and exchanges heat between the ice water / ice slurry and the return water in the first preheating channel, and then delivers the ice water obtained after the heat exchange to the ice crystal filter, and delivers the ice water to the supercooled water plate heat exchanger through the ice crystal filter for cyclic ice-making.

[0037] The ice slurry output from the ice storage tank through the ice slurry delivery pipeline can be directly pumped to an external cold end (such as a cold end for a fishing vessel) by a cold end pump for use. Figure 1As shown, an ice melting pump, an ice melting plate heat exchanger and a cold end pump are provided. The ice melting pump is used to pump ice slurry to the first heat exchange channel of the ice melting plate heat exchanger. The ice slurry in the first heat exchange channel of the ice melting plate heat exchanger exchanges heat with cold water in the second heat exchange channel, so that cold ice slurry is obtained in the second heat exchange channel after heat exchange, and the cold ice slurry is output to the cold end for use. The ice slurry in the first heat exchange channel of the ice melting plate heat exchanger obtains purified seawater after heat exchange, and the purified seawater is output to the water supply pipeline for cyclic use. The cold end pump can pump the cold water provided by the cold end to the second heat exchange channel of the ice melting plate heat exchanger for cyclic heat exchange, so as to continuously obtain cold ice slurry.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An offshore wind power local consumption system based on fluidized ice slurry cold storage, characterized in that: It includes a seawater supply subsystem, a refrigeration cycle subsystem, a supercooled water circulation subsystem, an ice slurry production subsystem, an ice slurry transportation subsystem and an ice slurry melting subsystem; the seawater supply subsystem is used to provide purified seawater to the refrigeration cycle subsystem and the ice slurry transportation subsystem; the refrigeration cycle subsystem is used to access the power supply of the wind turbine generator set for operation, and use purified seawater to generate refrigerant; the ice slurry transportation subsystem is used to store ice slurry, and add purified seawater to the stored ice slurry to output ice slurry; the ice slurry production subsystem is used to use refrigerant to cool ice water into supercooled water, promote crystallization of the supercooled water, obtain ice slurry, transfer the ice slurry to the ice slurry transportation subsystem for storage, and recycle the ice slurry of the ice slurry transportation subsystem to extract ice water; the ice slurry melting subsystem is used to transfer the cold of the ice slurry output by the ice slurry transportation subsystem to the cold end.

2. The offshore wind power local consumption system based on fluidized ice slurry cold storage according to claim 1 is characterized in that: The seawater supply subsystem includes a seawater purification device, a seawater pump, a seawater pool and a cooling water pump. The seawater purification device is used to input seawater for purification and output purified seawater. The seawater pump is used to pump the purified seawater output by the seawater purification device into the seawater pool for cooling and storage. The cooling water pump is used to pump the purified seawater stored in the seawater pool into a water supply pipeline and output the purified seawater through the water supply pipeline.

3. The offshore wind power local consumption system based on fluidized ice slurry cold storage according to claim 2 is characterized in that: The refrigeration cycle subsystem includes a refrigeration main unit, which includes a compressor, a condenser, a throttle valve and an evaporator. A first refrigerant circulation pipeline and a second refrigerant circulation pipeline are connected between the condenser and the evaporator. The compressor is arranged on the first refrigerant circulation pipeline, and the compressor is connected to the power supply of the wind turbine generator set. The throttle valve is arranged on the second refrigerant circulation pipeline. The water inlet of the condenser is connected to a water supply pipeline for introducing purified seawater. The return water outlet of the condenser is connected to a return water pipeline for outputting return water. The return water pipeline is connected to a seawater pool for discharging return water into the seawater pool.

4. The offshore wind power local consumption system based on fluidized ice slurry cold storage according to claim 3 is characterized in that: The refrigerant of the refrigeration main unit is ethylene glycol, and the supercooled water circulation subsystem includes an ethylene glycol circulation pump and a supercooled water plate heat exchanger. The ethylene glycol circulation pump is used to draw the refrigerant of the evaporator into the first heat exchange channel of the supercooled water plate heat exchanger, and return the refrigerant to the evaporator via the first heat exchange channel. The second heat exchange channel of the supercooled water plate heat exchanger is connected to the ice slurry preparation subsystem, which is used to introduce ice water from the ice slurry preparation subsystem, and exchange heat between the ice water and the refrigerant in the first heat exchange channel to obtain supercooled water, and return the supercooled water to the ice slurry preparation subsystem.

5. The offshore wind power local consumption system based on fluidized ice slurry cold storage according to claim 4 is characterized in that: The ice slurry preparation subsystem includes a crystal promoter, an ice-making pump and an ice crystal filter. The ice-making pump is used to extract ice slurry from the ice slurry transportation subsystem and transport the ice slurry to the ice crystal filter. The ice crystal filter is used to filter the ice slurry extracted by the ice-making pump for ice crystals, and output the ice water obtained after filtering the ice crystals to the second heat exchange channel of the supercooled water plate heat exchanger for heat exchange. The crystal promoter is used to promote crystallization of the supercooled water output from the second heat exchange channel of the supercooled water plate heat exchanger to obtain ice slurry, and then transmit the ice slurry to the ice slurry transportation subsystem.

6. The offshore wind power local consumption system based on fluidized ice slurry cold storage according to claim 5 is characterized in that: The ice slurry production subsystem also includes an ice crystal preheater, wherein the first preheating channel of the ice crystal preheater is respectively connected to the return water pipeline and the water supply pipeline, and is used to introduce return water from the return water pipeline for precooling treatment to obtain precooled purified seawater, and return the precooled purified seawater to the water supply pipeline; the second preheating channel of the ice crystal preheater is respectively connected to both ends of the ice making pump, and is used to introduce ice slurry of the ice slurry transportation subsystem, and exchange heat between the ice slurry and the return water in the first preheating channel, and transport the ice water obtained after the heat exchange to the ice crystal filter.

7. The offshore wind power local consumption system based on fluidized ice slurry cold storage according to claim 5 is characterized in that: The ice slurry conveying subsystem includes an ice storage tank, which is used to store the ice slurry conveyed by the crystal promoter, and a water replenishment pipe is connected to the top of the ice storage tank, and an ice slurry conveying pipe is provided at the bottom. The water replenishment pipe is connected to the water supply pipe and is used to replenish the purified seawater in the water supply pipe into the ice slurry in the ice storage tank. The ice slurry conveying pipe is used to output the ice slurry in the ice storage tank.

8. The offshore wind power local consumption system based on fluidized ice slurry cold storage according to claim 7 is characterized in that: The ice slurry melting subsystem includes an ice melting pump, an ice melting plate heat exchanger and a cold end pump. The ice melting pump is used to pump the ice slurry output from the ice slurry delivery pipeline to the first heat exchange channel of the ice melting plate heat exchanger. The cold end pump is used to pump the cold water at the cold end to the second heat exchange channel of the ice melting plate heat exchanger. The ice slurry in the first heat exchange channel of the ice melting plate heat exchanger exchanges heat with the cold water in the second heat exchange channel. After heat exchange, the first heat exchange channel of the ice melting plate heat exchanger obtains purified seawater, and the purified seawater is output to the water replenishment pipeline. After heat exchange, the second heat exchange channel of the ice melting plate heat exchanger obtains cold ice slurry, and the cold ice slurry is output to the cold end.

9. The offshore wind power local consumption system based on fluidized ice slurry cold storage according to claim 7 is characterized in that: The ice slurry melting subsystem comprises a cold end pump, and the cold end pump is used to pump the ice slurry output from the ice slurry conveying pipeline to the cold end.

10. The offshore wind power local consumption system based on fluidized ice slurry cold storage according to claim 2, characterized in that: The seawater pool is provided with a temperature sensor and is connected with a drainage pipe.

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