Integrated floating type offshore energy and resource station

Abstract

The invention relates to the technical field of offshore energy integration systems, in particular to an integrated floating type offshore energy and resource station. According to the invention, power generation is carried out through floating offshore wind power or photovoltaic power, and energy storage is carried out through underwater compressed air; low-frequency and stable parts in the electric energy are converted into potential energy of compressed air to be stored, and high-frequency and violently-fluctuating parts are converted into heat energy to be stored; inlet air of the expansion machine is subjected to two-stage heating by adopting interstage compression heat and electric heating, and a low-temperature part of the interstage compression heat is used for driving the multi-effect distillation seawater desalination system to prepare fresh water; ice making and cold energy making are achieved through the expansion refrigeration characteristic of the expansion machine; the floating type offshore energy and resource station integrates power generation, energy storage, ice, cold, heat and fresh water, and can provide electric energy, fresh water, ice and cold and hot supply for offshore equipment, ships or islands.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore energy integration systems, and particularly refers to an integrated floating offshore energy and resource station. Background Art

[0002] In recent years, the installed capacity of offshore renewable energy power generation in China has increased rapidly. Taking offshore wind power as an example, the planned scale of offshore wind power development introduced in various places has reached 80 million kilowatts, and the cumulative installed capacity will exceed 200 million kilowatts by 2030. With the rapid large-scale development of offshore renewable energy power generation, energy storage has become a core issue that urgently needs to be solved.

[0003] China has a vast ocean area. A large number of ships and islands at sea need electric energy, fresh water, ice, and cold energy, etc. Especially in the sea areas far from the mainland, it is difficult to obtain resources and energy such as fresh water, electric energy, and ice, and the prices are high.

[0004] Based on this, in order to achieve the mutual complementation and common utilization of various energies, there is an urgent need for a floating offshore energy and resource station that integrates power generation, underwater energy storage, ice, cold, heat, and fresh water to solve the above problems. Summary of the Invention

[0005] The object of the present invention is to provide an integrated floating offshore energy and resource station to solve the problems existing in the prior art.

[0006] To solve the problems existing in the prior art, the present invention adopts the following technical solutions:

[0007] An integrated floating offshore energy and resource station includes electric energy generated by floating wind power or photovoltaic power, an electric heater, an electric heating hot water tank, an electric heating hot water pump, an electric heating cold water pump, an electric heating cold water tank, a plurality of inter-stage heaters, a plurality of water heaters, a generator, a plurality of expanders, a plurality of gas valves, a plurality of compressors, a motor, a plurality of inter-stage coolers, a heat recovery cold water tank, a heat recovery cold water pump, a heat recovery hot water tank, a heat recovery hot water pump, a low-temperature multi-effect distillation seawater desalination system, a low-temperature expander, an ice-making device, a refrigeration device, a gas transmission pipe, a heating heat exchanger, a floating platform, a seawater intake pipe, a seawater discharge pipe, and an underwater gas storage tank;

[0008] Generate electricity through floating offshore wind power or photovoltaic power, and store energy through underwater compressed air;

[0009] Among them, part of the electric energy is converted into the potential energy of compressed air for storage, and the other part is converted into heat energy for storage; the intake air of the expander is heated in two stages by inter-stage compression heat and electric heating, and the low-temperature part of the inter-stage compression heat is used to drive a multi-effect distillation seawater desalination system to produce fresh water; the ice-making and cold energy production are realized by using the expansion refrigeration characteristics of the expander, and a floating offshore energy and resource station integrating power generation, energy storage, ice, cold, heat and fresh water is formed.

[0010] As an improvement to the technical solution of the integrated floating offshore energy and resource station of the present invention, the numbers of the inter-stage heater, the water heater, the expander, the compressor, and the inter-stage cooler in the integrated floating offshore energy and resource station are all three, corresponding to the first stage, the second stage, and the third stage respectively.

[0011] As an improvement to the technical solution of the integrated floating offshore energy and resource station of the present invention, the integrated floating offshore energy and resource station includes five working modes;

[0012] The five working modes are respectively an energy storage mode, an energy release mode, an ice-making and refrigeration mode, a heat generation mode, and a fresh water production mode.

[0013] As an improvement to the technical solution of the integrated floating offshore energy and resource station of the present invention, in the energy storage mode: part of the electric energy drives the motor, and the motor drives a plurality of compressors to compress air, and the compressed air is stored in the underwater air storage tank;

[0014] Another part of the electric energy drives an electric heater to heat the water medium, and then the heated water is stored in the motor hot water tank;

[0015] A inter-stage cooler is connected to the outlet of each compressor, and the inter-stage heat generated by the compressed gas is recovered by the corresponding inter-stage cooler, and the inter-stage heat is used to heat the water medium, and then the heated water is stored in the heat recovery hot water tank.

[0016] As an improvement to the technical solution of the integrated floating offshore energy and resource station of the present invention, in the energy release mode: when the peak demand for electric energy occurs, the high-pressure air stored in the underwater air storage tank is released to drive a plurality of expanders and generators to generate electricity;

[0017] The high-pressure air is heated before entering the expander to increase the intake air temperature; the intake air of the expander is heated in two stages. First, it is heated by the water in the heat recovery hot water tank, and then it is heated by the water in the electric heating hot water tank;

[0018] The water in the heat recovery hot water tank heats the air through the water heater, and the air heated by the water heater enters the inter-stage heater to be heated again, and then returns to the expander to perform expansion work;

[0019] The water in the electric heating hot water tank enters the electric heating cold water tank after passing through the inter-stage heater.

[0020] As an improvement to the technical solution of the integrated floating offshore energy and resource station of the present invention, in the ice-making and refrigeration mode: during the energy release period, the outlet of the second-stage expander is connected to the low-temperature expander;

[0021] Air enters the low-temperature expander after passing through the second-stage expander, and then enters the ice-making and refrigeration equipment to perform ice-making and refrigeration respectively.

[0022] As an improvement to the technical solution of the integrated floating offshore energy and resource station of the present invention, in the fresh water production mode: during the energy release period, water flows out from the outlet of the water heater and enters the low-temperature multi-effect distillation seawater desalination system for fresh water production.

[0023] As an improvement to the technical solution of the integrated floating offshore energy and resource station of the present invention, in the heating mode: water flows out from the low-temperature multi-effect distillation seawater desalination system, enters the heating heat exchanger for heat exchange, and the water after heat exchange in the heating heat exchanger returns to the heat recovery cold water tank.

[0024] Advantages of the present invention:

[0025] In the present invention, power is generated by floating offshore wind power or photovoltaic power, and energy is stored by underwater compressed air; the low-frequency and relatively stable part of the electric energy is converted into the potential energy of compressed air for storage, while the high-frequency and violently fluctuating part is converted into heat energy for storage; the intake of the expander is heated in two stages by inter-stage compression heat and electric heating, and the low-temperature part of the inter-stage compression heat is used to drive the multi-effect distillation seawater desalination system to produce fresh water; the ice-making and cold energy production are realized by using the expansion refrigeration characteristics of the expander; an integrated floating offshore energy and resource station integrating power generation, energy storage, ice, cold, heat, and fresh water can provide electric energy, fresh water, ice, and heat and cold supply for offshore equipment, ships or islands. Description of the Drawings

[0026] Figure 1 It is a structural schematic diagram of the present invention.

[0027] Description of the reference numerals: 1 - Electric energy generated by floating wind power or photovoltaic power; 2 - Electric heater; 3 - Electric heating hot water tank; 4 - Electric heating hot water pump; 5 - Electric heating cold water pump; 6 - Electric heating cold water tank; 7 - First - stage intermediate heater; 8 - Second - stage intermediate heater; 9 - Third - stage intermediate heater; 10 - First water heater; 11 - Second water heater; 12 - Third water heater; 13 - Generator; 14 - Third - stage expander; 15 - Second - stage expander; 16 - First - stage expander; 17 - First gas valve; 18 - Second gas valve; 19 - Third - stage compressor; 20 - Second - stage compressor; 21 - First - stage compressor; 22 - Electric motor; 23 - First - stage intermediate cooler; 24 - Second - stage intermediate cooler; 25 - Third - stage intermediate cooler; 26 - Heat recovery cold water tank; 27 - Heat recovery cold water pump; 28 - Heat recovery hot water tank; 29 - Heat recovery hot water pump; 30 - Low - temperature multi - effect distillation seawater desalination system; 31 - Third gas valve; 32 - Low - temperature expander; 33 - Ice - making equipment; 34 - Refrigeration equipment; 35 - Gas transmission pipe; 36 - Heating heat exchanger; 37 - Floating platform; 38 - Seawater intake pipe; 39 - Seawater discharge pipe; 40 - Seawater; 41 - Underwater gas storage tank. Detailed implementation manners

[0028] To make the invention objectives, technical solutions and beneficial effects of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0029] As Figure 1 shown, an integrated floating offshore energy and resource station includes electric energy 1 generated by floating wind power or photovoltaic power, an electric heater 2, an electric heating hot water tank 3, an electric heating hot water pump 4, an electric heating cold water pump 5, an electric heating cold water tank 6, multiple intermediate heaters, multiple water heaters, a generator 13, multiple expanders, multiple gas valves, multiple compressors, an electric motor 22, multiple intermediate coolers, a heat recovery cold water tank 26, a heat recovery cold water pump 27, a heat recovery hot water tank 28, a heat recovery hot water pump 29, a low - temperature multi - effect distillation seawater desalination system 30, a low - temperature expander 32, ice - making equipment 33, refrigeration equipment 34, a gas transmission pipe 35, a heating heat exchanger 36, a floating platform 37, a seawater intake pipe 38, a seawater discharge pipe 39, and an underwater gas storage tank 41;

[0030] Generate electricity through floating offshore wind power or photovoltaic power, and store energy through underwater compressed air;

[0031] Among them, part of the electric energy is converted into the potential energy of compressed air for storage, and the other part is converted into heat energy for storage; the intake air of the expander is heated in two stages by inter-stage compression heat and electric heating, and the low-temperature part of the inter-stage compression heat is used to drive a multi-effect distillation seawater desalination system to produce fresh water; the expansion refrigeration characteristics of the expander are used to realize ice making and cold energy production; a floating offshore energy and resource station integrating power generation, energy storage, ice, cold, heat, and fresh water.

[0032] In the present invention, since the present invention is applicable to floating on the sea, the present invention includes a floating platform 37, an electric heater 2, an electric heating hot water tank 3, an electric heating hot water pump 4, an electric heating cold water pump 5, an electric heating cold water tank 6, a plurality of inter-stage heaters, a plurality of water heaters, a generator 13, a plurality of expanders, a plurality of gas valves, a plurality of compressors, a motor 22, a plurality of inter-stage coolers, a heat recovery cold water tank 26, a heat recovery cold water pump 27, a heat recovery hot water tank 28, a heat recovery hot water pump 29, a low-temperature multi-effect distillation seawater desalination system 30, a low-temperature expander 32, an ice making device 33, a refrigeration device 34, and a heating heat exchanger 36 are all arranged on the floating platform 37. The floating platform 37 floats on the sea, and an underwater gas storage tank 41 is provided below the floating platform 37. The underwater gas storage tank 41 is connected to a gas transmission pipe 35; in addition, the low-temperature multi-effect distillation seawater desalination system 30 is also connected to seawater 40 through a seawater intake pipe 38 and a seawater discharge pipe 39 respectively to achieve the effect of water intake. In this way, the energy storage device is arranged in the seawater 40 of the floating platform 37, reducing the overall volume of the present invention and facilitating its use on the sea.

[0033] In the present invention, power generation is carried out through floating offshore wind power or photovoltaic power, and energy storage is carried out through underwater compressed air; the low-frequency and relatively stable part of the electric energy is converted into the potential energy of compressed air for storage, while the high-frequency and violently fluctuating part is converted into heat energy for storage; the intake air of the expander is heated in two stages by inter-stage compression heat and electric heating, and the low-temperature part of the inter-stage compression heat is used to drive a low-temperature multi-effect distillation seawater desalination system to produce fresh water; the expansion refrigeration characteristics of the expander are used to realize ice making and cold energy production; a floating offshore energy and resource station integrating power generation, energy storage, ice, cold, heat, and fresh water can provide electric energy, fresh water, ice, and heat and cold supply for offshore equipment, ships or islands.

[0034] Specifically, in the present invention, the electric energy generated by floating wind power or photovoltaic power is divided into three paths and respectively transmitted to the electric heater 2, the motor 22, and the external power grid.

[0035] Among them, in one path delivered to the electric heater 2, the water outlet end of the electric heater 2 is sequentially connected to the motor hot water tank and the motor hot water pump. The outlet of the electric heating hot water pump 4 is also respectively connected to the inlets of the first-stage inter-heater 7, the second-stage inter-heater 8, and the third-stage inter-heater 9. The outlets of the first-stage inter-heater 7, the second-stage inter-heater 8, and the third-stage inter-heater 9 are respectively connected to the electric heating cold water tank 6, and the electric heating cold water tank 6 is connected to the motor heater, forming a first circulation loop as a whole.

[0036] In one path delivered to the motor 22, the first-stage compressor 21, the second-stage compressor 20, and the third-stage compressor 19 are coaxially arranged, and the inlets of the three-stage compressors are respectively and simultaneously connected to the motor 22. The outlet end of each stage of the compressor is connected with an inter-stage cooler. The exhaust port of the first-stage compressor 21 is sequentially connected to the first-stage inter-cooler 23, the second-stage compressor 20, the second-stage inter-cooler 24, the third-stage compressor 19, and the third-stage inter-cooler 25. The third-stage inter-cooler 25 also passes through the first gas valve 17 and the second gas valve 18 arranged in parallel, and is connected to the underwater gas storage tank 41.

[0037] The water outlet end of the heat recovery cold water tank 26 is sequentially connected to the heat recovery cold water pump 27, the inlets of the first-stage inter-cooler 23, the second-stage inter-cooler 24, and the third-stage inter-cooler 25. The outlets of the first-stage inter-cooler 23, the second-stage inter-cooler 24, and the third-stage inter-cooler 25 are sequentially connected to the heat recovery hot water tank 28 and the heat recovery hot water pump 29.

[0038] The outlet of the heat recovery hot water pump 29 is divided into three paths, respectively connected to the first water heater 10, the second water heater 11, and the third water heater 12. The three paths of the water outlets of the first water heater 10, the second water heater 11, and the third water heater 12 are combined into one path and connected to the low-temperature multi-effect distillation seawater desalination system 30.

[0039] The low-temperature multi-effect distillation seawater desalination system 30 is also respectively connected to the heating heat exchanger 36 and the heat recovery cold water tank 26.

[0040] The first gas valve 17 is sequentially connected to the inlets of the first water heater 10 and the first-stage inter-heater 7 through the gas delivery pipe 35. The gas outlet end of the first-stage inter-heater 7 is connected to the first-stage expander 16, and the gas outlet of the first-stage expander 16 is connected to the second water heater 11.

[0041] The second-stage inter-heater 8 is sequentially connected to the second expander and the third water heater 12, and the inlet of the third-stage expander 14 is connected to the third-stage inter-heater 9.

[0042] The first-stage expander 16, the second-stage expander 15, and the third-stage expander 14 are coaxially arranged, and all three are simultaneously connected to the generator 13.

[0043] In addition, the air outlet of the second-stage expander 15 is divided into two paths. One path is connected to the second water heater 11, and the other path is sequentially connected to the intake port of the third gas valve 31 and the cryogenic expander 32. The air outlet of the cryogenic expander 32 is connected to the ice-making device 33, and the ice-making device 33 is connected to the refrigeration device 34 at the back.

[0044] In some embodiments of the present invention, the integrated floating offshore energy and resource station includes five working modes; the five working modes are respectively the energy storage mode, the energy release mode, the ice-making and refrigeration mode, the heating mode, and the fresh water production mode.

[0045] Among them, when in the energy storage mode, a part of the electric energy drives the motor 22, and the motor 22 drives a plurality of compressors to compress air, and the compressed air is stored in the underwater gas storage tank 41;

[0046] Another part of the electric energy drives the electric heater 2 to heat the water medium, and then the heated water is stored in the electric heating hot water tank.

[0047] Each compressor outlet is connected with an inter-stage cooler, and the inter-stage heat generated by compressing the gas is recovered by the corresponding inter-stage cooler. The inter-stage heat is used to heat the water medium, and then the heated water is stored in the heat recovery hot water tank 28.

[0048] When in the energy release mode, at the peak of the electric energy demand, the high-pressure air stored in the underwater gas storage tank 41 is released to drive a plurality of expanders and a plurality of generators 13 to generate electricity;

[0049] Before the high-pressure air enters the expander, it is first heated to increase the intake air temperature; the intake air of the expander adopts a two-stage heating method, first heated by the water in the heat recovery hot water tank 28, and then heated by the water in the electric heating hot water tank 3;

[0050] The water in the heat recovery hot water tank 28 heats the air through the water heater. The air heated by the water heater enters the inter-stage heater to be heated again, and then returns to the expander to perform expansion work;

[0051] The water in the electric heating hot water tank 3 enters the electric heating cold water tank 6 after passing through the inter-stage heater.

[0052] When in the ice-making and refrigeration mode, during the energy release period, the air outlet of the second-stage expander 15 is connected to the cryogenic expander 32; the air enters the cryogenic expander 32 after passing through the second-stage expander 15, and then enters the ice-making and refrigeration device 34 to perform ice-making and refrigeration correspondingly.

[0053] When in the fresh water production mode, during the energy release period, the water flows out from the water outlet of the water heater and enters the low-temperature multi-effect distillation seawater desalination system 30 for producing fresh water.

[0054] When in the heating mode, water flows out of the low-temperature multi-effect distillation seawater desalination system 30 and enters the heating heat exchanger 36 for heat exchange. The water after heat exchange in the heating heat exchanger 36 returns to the heat recovery cold water tank 26.

[0055] In some embodiments of the present invention, since the present invention adopts the underwater drainage and gas storage method, the pressure is constant during the energy storage and energy release processes, improving the efficiency of the compressor and expander, as well as the cycle efficiency of the entire system.

[0056] In some embodiments of the present invention, since the electric energy generated by floating wind power or photovoltaic is divided into three paths and respectively transmitted to the electric heater 2, the motor 22, and the external power grid, not only the relatively stable low-frequency electric energy is utilized, but also the high-frequency or violently fluctuating electric energy is converted into heat energy, realizing the efficient utilization and conversion of electric energy.

[0057] In some embodiments of the present invention, since an inter-stage cooler is connected corresponding to each stage of the compressor to achieve the effect of recovering the inter-stage compression heat, the recovered inter-stage compression heat is utilized in two stages. The high-temperature part is used to heat the inlet air of the expander, and the low-temperature part is used to drive the low-temperature multi-effect distillation seawater desalination system 30 to produce fresh water. The hot water out of the low-temperature multi-effect distillation seawater desalination system 30 is further used for heating, realizing the efficient utilization and conversion of heat energy.

[0058] In some embodiments of the present invention, the air entering the expander is heated in two stages. First, it is heated by the recovered inter-stage compression heat, and then by the electric heater 2, efficiently utilizing the heat energy at different temperatures, increasing the power generation, and at the same time realizing the efficient conversion of electricity-heat-electricity.

[0059] In some embodiments of the present invention, the ice-making device 33 and the refrigeration device 34 after the low-temperature expander 32 are connected in series, realizing the efficient utilization of the cold energy of the expander.

[0060] The working principle of the present invention is as follows: The electric energy from floating wind power or photovoltaic is divided into three paths. The first path is connected to the external power grid, the second path is connected to the motor 22, and the third path is connected to the electric heater 2.

[0061] During periods of low electricity demand, the low-frequency, more stable portion of electricity drives the motor 22 and compressor, converting it into the pressure potential energy of the air for storage. The high-frequency or more volatile portion of electricity is used to drive the electric heater 2, converting it into thermal energy. This thermal energy is then used to heat the expander intake air, increasing power generation, and then converting it back into electricity. The interstage heat of compression in the compressor is recovered through the interstage cooler. This recovered heat has two uses: the high-temperature heat is used to heat the expander intake air, while the low-temperature heat is used to drive the low-temperature, multi-effect distillation desalination system 30 to produce fresh water and provide heating. The high-pressure air after the compressor is stored in an underwater air storage tank 41.

[0062] During peak power demand, high-pressure air from underwater air storage tank 41 is released, driving the expander to generate power and generator 13 to generate electricity. The air entering the expander is high-pressure but low-temperature. To improve power generation, the expander inlet temperature must be increased. The expander inlet air is heated in two stages: the first stage uses heat recovered from the interstage cooler, and the second stage uses an electric heater 2.

[0063] Ice making and refrigeration are achieved by utilizing the low-temperature expansion generated by the expander. The exhaust from the second-stage expander 15 is directed to a low-temperature expander 32, which both generates electricity and expands the air to produce low-temperature air. This low-temperature air is then used to make ice and provide refrigeration. Furthermore, since the ice-making device 33 and the refrigeration device 34 are connected in series after the low-temperature expander 32, the exhaust from the low-temperature expander 32 passes through the ice-making device 33 before the refrigeration device 34. This allows for refrigeration after ice making, effectively conserving cooling capacity.

[0064] As an embodiment of the present invention, taking the underwater gas storage tank 41 arranged at a depth of 800m as an example, three-stage compression and three-stage expansion are adopted.

[0065] The working modes of floating offshore energy and resource stations can be divided into energy storage mode, energy release mode, ice making and cooling mode, heating mode and fresh water making mode.

[0066] Energy Storage Mode: The low-frequency, relatively stable portion of the electrical energy drives motor 22, which drives a compressor to compress air at room temperature and pressure to 8 MPa, which is then stored in underwater air storage tank 41. The high-frequency, highly fluctuating portion of the electrical energy drives electric heater 2, heating water to 300°C, which is then stored in electrically heated hot water tank 3. Interstage compression heat is recovered using an interstage cooler, and the recovered 200°C hot water is stored in heat recovery hot water tank 28.

[0067] Energy release mode: During the peak power demand, the 8 MPa high-pressure air stored in the underwater gas storage tank 41 is released to drive the expander and the generator 13 to generate electricity. Before entering the expander, the high-pressure air is heated to increase the intake air temperature. The intake air of the expander is heated in two stages. First, it is heated by the water in the heat recovery hot water tank 28, and then by the water in the electric heating hot water tank 3. The 200 °C hot water in the heat recovery hot water tank 28 heats the air to 180 °C through the water heater, and the hot water leaving the water heater becomes 100 °C. The air heated by the water heater enters the inter-stage heater for further heating, and the temperature rises to 280 °C, and then enters the expander for expansion work. The 300 °C hot water in the electric heating hot water tank 3 becomes 200 °C after passing through the inter-stage heater, and then enters the electric heating cold water tank 6.

[0068] Ice making and refrigeration mode: During the energy release period, the outlet gas of the second-stage expander 15 enters the low-temperature expander 32 for expansion work before being heated. The air temperature after passing through the low-temperature expander 32 becomes -50 °C, and then enters the ice making and refrigeration equipment 34. The cold energy in the temperature range of -50 °C to -20 °C in the ice making equipment 33 is used for ice making, and the air at -20 °C to 0 °C in the refrigeration equipment 34 is used to produce 5 °C cold water.

[0069] Fresh water production mode: During the energy release period, the hot water leaving the water heater becomes 100 °C, and then this hot water enters the low-temperature multi-effect distillation seawater desalination system 30 for fresh water production. The water leaving the low-temperature multi-effect distillation seawater desalination system 30 becomes 50 °C.

[0070] Heating mode: The water leaving the low-temperature multi-effect distillation seawater desalination system 30 becomes 50 °C, and then enters the heating heat exchanger 36. In the heating heat exchanger 36, the 50 °C hot water cools down to 40 °C and then returns to the heat recovery cold water tank 26. And the heating water is heated from 35 °C to 45 °C.

[0071] Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Claims

1. An integrated floating offshore energy and resource station, characterized in that, It includes electric energy generated by floating wind power or photovoltaic power, electric heaters, electric heating hot water tanks, electric heating hot water pumps, electric heating cold water pumps, electric heating cold water tanks, multiple inter-stage heaters, multiple water heaters, generators, multiple expanders, multiple gas valves, multiple compressors, electric motors, multiple inter-stage coolers, heat recovery cold water tanks, heat recovery cold water pumps, heat recovery hot water tanks, heat recovery hot water pumps, low-temperature multi-effect distillation seawater desalination systems, low-temperature expanders, ice-making equipment, refrigeration equipment, gas pipelines, heating heat exchangers, floating platforms, seawater intake pipes, seawater drain pipes and underwater gas storage tanks; Generate electricity through floating offshore wind power or photovoltaic power, and store energy through underwater compressed air; Among them, part of the electric energy is converted into the potential energy of compressed air for storage, and the other part is converted into heat energy for storage; the intake air of the expander is heated in two stages by inter-stage compression heat and electric heating, and the low-temperature part of the inter-stage compression heat is used to drive the multi-effect distillation seawater desalination system to produce fresh water; the expansion refrigeration characteristics of the expander are used to realize ice-making and cold energy production, integrating a floating offshore energy and resource station that combines power generation, energy storage, ice, cold, heat and fresh water.

2. The integrated floating offshore energy and resource station according to claim 1, wherein The number of the inter-stage heaters, the water heaters, the expanders, the compressors and the inter-stage coolers in the integrated floating offshore energy and resource station is three each, corresponding to the first stage, the second stage and the third stage respectively.

3. The integrated floating offshore energy and resource station according to claim 2, wherein The integrated floating offshore energy and resource station includes five working modes; The five working modes are energy storage mode, energy release mode, ice-making and refrigeration mode, heating mode and fresh water production mode.

4. The integrated floating offshore energy and resource station according to claim 3, characterized in that, Energy storage mode: Part of the electric energy drives the electric motor, and the electric motor drives multiple compressors to compress air, and the compressed air is stored in the underwater gas storage tank; Another part of the electric energy drives the electric heater to heat the water medium, and then the heated water is stored in the electric heating hot water tank; The outlet of each compressor is connected with an inter-stage cooler, and the inter-stage heat generated by the compressed gas is recovered by the corresponding inter-stage cooler. The inter-stage heat is used to heat the water medium, and then the heated water is stored in the heat recovery hot water tank.

5. The integrated floating offshore energy and resource station according to claim 3, characterized in that Energy release mode: When the peak demand for electric energy occurs, the high-pressure air stored in the underwater gas storage tank is released to drive multiple expanders and generators to generate electricity; The high-pressure air is heated before entering the expander to increase the intake air temperature; the intake air of the expander is heated in two stages. First, it is heated by the water in the heat recovery hot water tank, and then by the water in the electric heating hot water tank; The water in the heat recovery hot water tank heats the air through the water heater. The air heated by the water heater enters the inter-stage heater to be heated again, and then returns to the expander to perform expansion work; The water in the electric heating hot water tank enters the electric heating cold water tank after passing through the inter-stage heater.

6. The integrated floating offshore energy and resource station according to claim 3, characterized in that, Ice-making and refrigeration mode: During the energy release period, the outlet of the second-stage expander is connected to the low-temperature expander; The air enters the low-temperature expander after passing through the second-stage expander, and then enters the ice-making and refrigeration equipment to perform ice-making and refrigeration correspondingly.

7. The integrated floating offshore energy and resource station according to claim 3, characterized in that, Fresh water production mode: During the energy release period, water flows out of the water outlet of the water heater and enters the low-temperature multi-effect distillation seawater desalination system for fresh water production.

8. The integrated floating offshore energy and resource station according to claim 3, wherein, Heating mode: Water flows out of the low-temperature multi-effect distillation seawater desalination system, enters the heating heat exchanger for heat exchange, and the water after heat exchange in the heating heat exchanger returns to the heat recovery cold water tank.

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