Ice-making system and ice-making method for making ice in marine ranch by using waste heat of electrolytic bath

Abstract

The invention belongs to the field of coupling of electrolytic bath waste heat utilization and marine ranch freezing, and particularly relates to an ice making system and an ice making method for marine ranch ice making through electrolytic bath waste heat. The ice-making system comprises an electrolytic bath waste heat utilization module and a marine ranch ice-making module. The electrolytic cell waste heat utilization module comprises a hydrogen production electrolytic cell, a working medium pump, an evaporator, a steam turbine, a condenser, a first connecting rod and a second connecting rod. The marine ranch ice-making module comprises a refrigeration compressor, a refrigeration condenser, an expansion valve, a refrigeration evaporator and a marine ranch ice-making chamber. A self-driven refrigerating and ice-making system without additional electric power or an external heat source is formed, so that the requirements of temperature control, fresh keeping, ecological regulation and the like of the marine ranch are efficiently met, the ice-making and cold chain guarantee functions required by the marine ranch are completed, and the self-driven refrigerating and ice-making system can be deployed on the marine ranch or an offshore wind power hydrogen production platform together with a hydrogen production platform.

Description

Technical Field

[0001] This invention belongs to the field of electrolytic cell waste heat utilization coupled with marine ranching refrigeration, specifically relating to an ice-making system and method for using electrolytic cell waste heat to make ice in marine ranches. Background Technology

[0002] As the global energy structure shifts towards low-carbon and clean energy, the importance of water electrolysis for hydrogen production has significantly increased in the utilization of renewable energy. However, alkaline electrolyzers and PEM electrolyzers inevitably generate a large amount of low-grade heat energy during hydrogen production. To maintain stable cell temperatures, cooling loops are typically required to discharge this waste heat into the surrounding environment. The recovery rate of this heat is low, resulting in energy waste and increasing the overall operating cost of the system. Meanwhile, marine ranches, as an important vehicle for the modernization of marine fisheries, have a continuous and stable demand for cooling sources for water cooling, ice storage, catch preservation, and seawater temperature control. This dependence is particularly pronounced in deep-sea aquaculture, high-temperature summer waters, and on-site initial processing. However, traditional marine ranch refrigeration systems generally rely on independent diesel generators or shore power, which are not only energy-intensive and emit large amounts of pollutants, but also difficult to operate and maintain in the marine environment, and suffer from long-standing problems with unstable energy supply.

[0003] In the process of developing this application, the applicant discovered that the waste heat generated by the electrolyzer is large and temperature-stable, possessing recycling value. However, existing technologies lack a system structure capable of effectively converting low-grade heat energy into usable cooling capacity. Furthermore, most existing refrigeration technologies require additional electricity input, making them unsuitable for energy-constrained offshore platforms. Existing technologies also fail to achieve effective energy coupling between "electrolyzer waste heat – thermodynamic cycle – refrigeration system (or ice-making system)," and have not developed a complete equipment solution specifically for ice-making and cold chain needs in actual marine ranching environments.

[0004] Therefore, there is an urgent need for a method and device that can fully utilize the waste heat of the electrolytic cell to achieve refrigeration or ice making through a reasonable energy conversion path, thereby providing a stable, clean, and low-energy cold source supply in the marine ranch environment, improving energy utilization efficiency, reducing operation and maintenance costs, and solving the technical bottlenecks of existing systems in terms of energy acquisition, cold chain security, and environmental adaptability.

[0005] This application is submitted in order to address the above issues. Summary of the Invention

[0006] The first aspect of this application provides an ice-making system for making ice in marine ranches by utilizing waste heat from an electrolytic cell, the ice-making system comprising: an electrolytic cell waste heat utilization module and a marine ranch ice-making module;

[0007] The waste heat utilization module of the electrolyzer includes: a hydrogen production electrolyzer 1, a working fluid pump 2, an evaporator 3, a steam turbine 4, a condenser 5, a connecting rod 1 6.1, and a connecting rod 2 6.2;

[0008] The marine ranch ice-making module includes: a refrigeration compressor 7, a refrigeration condenser 8, an expansion valve 9, a refrigeration evaporator 10, and a marine ranch ice-making chamber 11;

[0009] The electrolyte outlet of the hydrogen electrolyzer 1 is connected to the heating medium inlet of the evaporator 3, and the heating medium outlet of the evaporator 3 is connected to the electrolyte inlet of the hydrogen electrolyzer 1.

[0010] The working fluid outlet of the evaporator 3 is connected to the steam inlet of the steam turbine 4, the exhaust port of the steam turbine 4 is connected to the working fluid inlet of the condenser 5, and the working fluid outlet of the condenser 5 is connected to the working fluid inlet of the evaporator 3 via the working fluid pump 2.

[0011] The output shaft of the steam turbine 4 is connected to the working fluid pump 2 via connecting rod 6.1, and the output shaft of the steam turbine 4 is also connected to the refrigeration compressor 7 via connecting rod 6.2.

[0012] The suction port of the refrigeration compressor 7 is connected to the refrigerant outlet of the refrigeration evaporator 10, the discharge port of the refrigeration compressor 7 is connected to the working fluid inlet of the refrigeration condenser 8, the working fluid outlet of the refrigeration condenser 8 is connected to the inlet of the expansion valve 9, and the outlet of the expansion valve 9 is connected to the refrigerant inlet of the refrigeration evaporator 10. The refrigeration evaporator 10 is located in the ocean ranch ice-making chamber 11 and is used to absorb the heat of the ocean ranch ice-making chamber 11 to complete the ice-making process.

[0013] Preferably, the ice-making chamber 11 of the marine ranch contains seawater.

[0014] Preferably, the evaporator 3 contains a liquid working fluid, specifically liquid ammonia.

[0015] The refrigeration compressor 7 contains a refrigerant, specifically ammonia.

[0016] Preferably, the condenser 5 is also equipped with a condensate circulation pipe for supplying cooling water. Seawater can be used as the cooling water.

[0017] Preferably, the ice-making system further includes an ice storage chamber 13 and an ice conveying pipe 12, the ice conveying pipe 12 being configured to transport ice blocks formed by the marine ranch ice-making chamber 11 to the ice storage chamber 13.

[0018] The second aspect of this application provides an ice-making method for marine ranching using waste heat from an electrolytic cell, wherein the refrigeration method employs the ice-making system described in any one of the first aspects;

[0019] The ice-making method includes the following steps:

[0020] The electrolyte of the hydrogen production electrolyzer 1 enters the evaporator 3 through the electrolyte outlet and the heating medium inlet of the evaporator 3 to release heat, and then returns to the hydrogen production electrolyzer 1 through the heating medium outlet of the evaporator 3 and the electrolyte inlet of the hydrogen production electrolyzer 1.

[0021] The heat from the electrolyte causes the liquid working fluid in the evaporator 3 to absorb heat and vaporize, forming high-temperature and high-pressure steam. This steam enters the steam turbine 4 through the working fluid outlet of the evaporator 3 and the steam inlet of the steam turbine 4, expands, does work, and drives the steam turbine 4 to rotate. The output shaft of the steam turbine 4 drives the working fluid pump 2 to rotate through the first connecting rod 6.1, and the output shaft of the steam turbine 4 drives the refrigeration compressor 7 to rotate through the second connecting rod 6.2.

[0022] The steam that has completed its work enters the condenser 5 through the exhaust port of the steam turbine 4 and the working fluid inlet of the condenser 5 to release heat and condense. After flowing out through the working fluid outlet of the condenser 5, it is pressurized by the working fluid pump 2 and sent back to the evaporator 3 to achieve circulation.

[0023] The refrigeration compressor 7 compresses and heats the gaseous refrigerant inside. The compressed and heated gaseous refrigerant enters the refrigeration condenser 8 through the exhaust port of the refrigeration compressor 7 and the working fluid inlet of the refrigeration condenser 8. The compressed and heated gaseous refrigerant releases heat and liquefies in the refrigeration condenser 8. Then, after adiabatic expansion through the expansion valve 9, it decreases in pressure and temperature, forming a low-temperature and low-pressure two-phase refrigerant. The two-phase refrigerant enters the refrigeration evaporator 10 through the refrigerant inlet. In the refrigeration evaporator 10, the two-phase refrigerant absorbs heat from the marine ranch ice-making chamber 11 and becomes gaseous refrigerant. At the same time, it lowers the temperature of the marine ranch ice-making chamber 11 to below the freezing point, realizing the water freezing and ice-making functions. The gaseous refrigerant enters the refrigeration evaporator 10 through the refrigerant outlet to achieve circulation.

[0024] The two-phase refrigerant mentioned above refers to a gas-liquid two-phase refrigerant.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] Through the above process, this application realizes the step-by-step energy conversion of waste heat from hydrogen electrolyzer → working fluid phase change heat → turbine mechanical energy → working fluid pump work, refrigeration compression work → ice source, forming a self-driven refrigeration and ice-making system that does not require external electricity or external heat source. This efficiently meets the needs of marine ranches for temperature control, preservation and ecological regulation, and completes the ice-making and cold chain guarantee functions required by marine ranches. It can be deployed together with hydrogen production platforms on marine ranches or offshore wind power hydrogen production platforms. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the ice-making system of the present invention.

[0028] List of reference numerals in the attached diagram:

[0029] 1. Hydrogen electrolyzer, 2. Working fluid pump, 3. Evaporator, 4. Steam turbine, 5. Condenser, 6.1. Connecting rod one, 6.2. Connecting rod two, 7. Refrigeration compressor, 8. Refrigeration condenser, 9. Expansion valve, 10. Refrigeration evaporator, 11. Ocean ranch ice-making room, 12. Ice conveying pipeline, 13. Ice storage room. Detailed Implementation

[0030] The present application will now be described in further detail with reference to the embodiments.

[0031] Those skilled in the art will understand that the following embodiments are for illustrative purposes only and should not be construed as limiting the scope of this application. Where specific techniques or conditions are not specified in the embodiments, they are performed in accordance with the techniques or conditions described in the literature in the field or according to the product manual. Materials or equipment whose manufacturers are not specified are all conventional products that can be obtained by purchase.

[0032] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. In the description of this application, unless otherwise stated, “a plurality” means two or more. It should be further understood that the term “comprising” as used in the specification of this application means the presence of the stated feature, integer, step, operation, element, and / or component, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should be understood that when we say an element is “connected” to another element, it can be directly connected to the other element, or there may be an intermediate element. Furthermore, the term “connected” as used herein can include wireless connections.

[0033] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0035] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0038] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the meaning consistent with their meaning in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless defined as herein.

[0039] like Figure 1 As shown, the present invention provides a marine ranch ice-making system that utilizes waste heat from an electrolytic cell. The system consists of an electrolytic cell waste heat utilization module and a marine ranch ice-making module.

[0040] The waste heat utilization module for the electrolyzer includes: a hydrogen production electrolyzer 1, a working fluid pump 2, an evaporator 3, a steam turbine 4, a condenser 5, a connecting rod 1 6.1, and a connecting rod 2 6.2.

[0041] The marine ranch ice-making module includes: a refrigeration compressor 7, a refrigeration condenser 8, an expansion valve 9, a refrigeration evaporator 10, a marine ranch ice-making chamber 11, an ice conveying pipeline 12, and an ice storage chamber 13.

[0042] Electrolytic cell 7 has an electrolyte inlet and an electrolyte outlet.

[0043] The condenser 5 has a working fluid inlet, a working fluid outlet, a medium inlet, and a medium outlet.

[0044] The evaporator 11 has a working fluid inlet, a working fluid outlet, a heating medium inlet, and a heating medium outlet. The working fluid undergoes a phase change within the evaporator 11; the low-temperature liquid working fluid enters the evaporator 11 through the working fluid inlet, and the evaporated gaseous working fluid flows out through the working fluid outlet. In this application, ammonia is used as the refrigerant.

[0045] Steam turbine 4 has a steam inlet and a steam outlet.

[0046] The refrigeration compressor 7 has an intake port and an exhaust port. The refrigeration compressor 7 is used to compress a low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gaseous refrigerant.

[0047] The refrigeration evaporator 10 has a refrigerant inlet and a refrigerant outlet. The refrigeration evaporator 10 is used to vaporize low-temperature, low-pressure liquid refrigerant into low-temperature, low-pressure gaseous refrigerant.

[0048] The refrigeration condenser 8 has a working fluid inlet, a working fluid outlet, a medium inlet, and a medium outlet.

[0049] The connection method of the above components is as follows:

[0050] The electrolyte outlet of the hydrogen production electrolyzer 1 is connected to the heating medium inlet of the evaporator 3, and the heating medium outlet of the evaporator 3 is connected to the electrolyte inlet of the hydrogen production electrolyzer 1.

[0051] The working fluid outlet of the evaporator 3 is connected to the steam inlet of the steam turbine 4, the exhaust port of the steam turbine 4 is connected to the working fluid inlet of the condenser 5, and the working fluid outlet of the condenser 5 is connected to the working fluid inlet of the evaporator 3 via the working fluid pump 2.

[0052] The output shaft of the steam turbine 4 is connected to the working fluid pump 2 via connecting rod 6.1, and the output shaft of the steam turbine 4 is also connected to the refrigeration compressor 7 via connecting rod 6.2.

[0053] The suction port of the refrigeration compressor 7 is connected to the refrigerant outlet of the refrigeration evaporator 10, the discharge port of the refrigeration compressor 7 is connected to the working fluid inlet of the refrigeration condenser 8, the working fluid outlet of the refrigeration condenser 8 is connected to the inlet of the expansion valve 9, and the outlet of the expansion valve 9 is connected to the refrigerant inlet of the refrigeration evaporator 10. The refrigeration evaporator 10 is located in the ocean ranch ice-making chamber 11 and is used to absorb the heat of the ocean ranch ice-making chamber 11 to complete the ice-making process.

[0054] The ice-making room 11 of the marine ranch contains seawater.

[0055] The evaporator 3 contains a liquid working fluid, specifically liquid ammonia.

[0056] The refrigeration compressor 7 contains a refrigerant, specifically ammonia.

[0057] The condenser 5 is also equipped with a condensate circulation pipe for supplying cooling water.

[0058] The ice conveying pipe 12 is configured to transport ice blocks formed in the marine ranch ice-making chamber 11 to the ice storage chamber 13.

[0059] The system operates as follows:

[0060] During system operation, the waste heat generated in the hydrogen electrolyzer 1 during hydrogen production enters the evaporator 3, causing the liquid working fluid in the evaporator 3 to absorb heat and vaporize, forming high-temperature, high-pressure steam. This steam is transported to the turbine 4, where it expands and performs work, driving the turbine 4 to rotate. The output shaft of the turbine 4 is connected to the working fluid pump 2 via connecting rod 6.1 and to the refrigeration compressor 7 via connecting rod 6.2, thus utilizing the mechanical energy converted from the waste heat of the hydrogen electrolyzer 1 to drive the working fluid pump 2 and the refrigeration compressor 7.

[0061] The refrigeration compressor 7 draws in the low-pressure refrigerant from the refrigeration evaporator 10 and compresses it into a high-temperature, high-pressure gas. The refrigerant then enters the refrigeration condenser 8 to release heat and condense. After passing through the expansion valve 9, it expands adiabatically and transforms into low-temperature, low-pressure wet vapor. Finally, it enters the refrigeration evaporator 10 to absorb heat from the ocean ranch ice-making chamber 11, completing the refrigeration process and rapidly cooling the water in the ocean ranch ice-making chamber 11 to form ice.

[0062] Meanwhile, the low-pressure working fluid steam discharged from turbine 4 is introduced into condenser 5 to cool and condense into liquid working fluid. After being pressurized by working fluid pump 2, it is sent back to evaporator 3, forming a closed working fluid cycle. The ice blocks formed in the ice-making room 11 of the marine ranch are transported to the ice storage room 13 through ice conveying pipeline 12 for use in environmental cooling, water body regulation, and fish preservation in the marine ranch.

[0063] The working principle of this invention is as follows:

[0064] Based on the waste heat utilization mechanism of hydrogen electrolyzer 1, the low-grade heat energy generated by hydrogen electrolyzer 1 during the hydrogen production process is converted into the heat energy of working fluid steam, and then further converted into the compression work to drive the refrigeration cycle, ultimately realizing the ice-making and cold chain functions required by the marine ranch.

[0065] Specifically, the hydrogen electrolyzer 1 generates a large amount of waste heat during operation. This heat enters the Rankine cycle through the evaporator 3, causing the liquid working fluid in the evaporator 3 to vaporize into high-temperature, high-pressure steam. After entering the steam turbine 4, the steam expands and does work, converting its thermal energy into mechanical energy, which drives the steam turbine 4 to rotate.

[0066] The steam turbine 4 is connected to the working fluid pump 2 and the refrigeration compressor 7 via mechanical connecting rods, thereby directly transmitting the mechanical power of the steam turbine 4 to the working fluid pump 2 and the refrigeration compressor 7, enabling the refrigerant to complete the processes of intake, compression, and exhaust, forming a typical vapor compression refrigeration cycle.

[0067] In this cycle, the refrigerant, which is compressed and heated by the refrigeration compressor 7, releases heat to the seawater or the external environment and liquefies in the refrigeration condenser 8. Then, after adiabatic expansion by the expansion valve 9, it rapidly depressurizes and cools down, forming a low-temperature, low-pressure two-phase refrigerant. It then absorbs heat from the marine ranch ice-making chamber 11 in the refrigeration evaporator 10, lowering the temperature of the marine ranch ice-making chamber 11 to below the freezing point, thus realizing the functions of water freezing and ice making.

[0068] Meanwhile, the working fluid steam that has done work in the steam turbine 4 is cooled and condensed into liquid by seawater in the condenser 5. After being pressurized by the working fluid pump 2, it is sent back to the evaporator 3 to absorb the waste heat from the hydrogen electrolyzer 1 again, thus forming a closed loop.

[0069] It should also be noted that: the working fluid pump 2 is connected to the steam turbine 4 via connecting rod 6.1; the refrigeration compressor 7 is connected to the steam turbine 4 via connecting rod 6.2.

[0070] The power cycle in the waste heat utilization module of the electrolytic cell can be an organic Rankine cycle, and the working fluid can be ammonia.

[0071] The refrigeration cycle in the ocean ranch ice-making module is a vapor compression refrigeration cycle, and the working fluid can be ammonia. The refrigeration temperature of the evaporator 10 can be -10 to 0℃.

Claims

1. An ice-making system for marine ranching utilizing waste heat from an electrolytic cell, characterized in that, The ice-making system includes: an electrolysis cell waste heat utilization module and a marine ranch ice-making module; The waste heat utilization module of the electrolyzer includes: a hydrogen production electrolyzer (1), a working fluid pump (2), an evaporator (3), a steam turbine (4), a condenser (5), a connecting rod one (6.1), and a connecting rod two (6.2). The marine ranch ice-making module includes: a refrigeration compressor (7), a refrigeration condenser (8), an expansion valve (9), a refrigeration evaporator (10), and a marine ranch ice-making chamber (11). The electrolyte outlet of the hydrogen electrolyzer (1) is connected to the heating medium inlet of the evaporator (3), and the heating medium outlet of the evaporator (3) is connected to the electrolyte inlet of the hydrogen electrolyzer (1). The working fluid outlet of the evaporator (3) is connected to the steam inlet of the steam turbine (4), the exhaust port of the steam turbine (4) is connected to the working fluid inlet of the condenser (5), and the working fluid outlet of the condenser (5) is connected to the working fluid inlet of the evaporator (3) via the working fluid pump (2). The output shaft of the steam turbine (4) is connected to the working fluid pump (2) via connecting rod one (6.1), and the output shaft of the steam turbine (4) is also connected to the refrigeration compressor (7) via connecting rod two (6.2); The suction port of the refrigeration compressor (7) is connected to the refrigerant outlet of the refrigeration evaporator (10), the discharge port of the refrigeration compressor (7) is connected to the working fluid inlet of the refrigeration condenser (8), the working fluid outlet of the refrigeration condenser (8) is connected to the inlet of the expansion valve (9), the outlet of the expansion valve (9) is connected to the refrigerant inlet of the refrigeration evaporator (10), and the refrigeration evaporator (10) is located in the ocean ranch ice-making chamber (11) to absorb the heat of the ocean ranch ice-making chamber (11) and complete the ice-making process.

2. The ice-making system for marine ranching using waste heat from an electrolytic cell as described in claim 1, characterized in that, The ice-making room (11) of the marine ranch contains seawater.

3. The ice-making system for marine ranching using waste heat from an electrolytic cell as described in claim 1, characterized in that, The evaporator (3) contains a liquid working fluid, specifically ammonia. The refrigeration compressor (7) contains a refrigerant, specifically ammonia.

4. The ice-making system for marine ranching using waste heat from an electrolytic cell as described in claim 1, characterized in that, The condenser (5) is also equipped with a condensate circulation pipe for providing cooling water.

5. The ice-making system for marine ranching using waste heat from an electrolytic cell as described in claim 1, characterized in that, The ice-making system further includes an ice storage chamber (13) and an ice conveying pipe (12), the ice conveying pipe (12) being configured to transport ice blocks formed by the marine ranch ice-making chamber (11) to the ice storage chamber (13).

6. A method for making ice in marine ranches using waste heat from an electrolytic cell, characterized in that, The refrigeration method is performed using the ice-making system described in any one of claims 1-5; The ice-making method includes the following steps: The electrolyte of the hydrogen production electrolyzer (1) enters the evaporator (3) through the electrolyte outlet and the heating medium inlet of the evaporator (3) to release heat, and then returns to the hydrogen production electrolyzer (1) through the heating medium outlet of the evaporator (3) and the electrolyte inlet of the hydrogen production electrolyzer (1). The heat of the electrolyte causes the liquid working fluid in the evaporator (3) to absorb heat and vaporize to form high-temperature and high-pressure steam. The steam enters the steam turbine (4) through the working fluid outlet of the evaporator (3) and the steam inlet of the steam turbine (4), expands and does work, and drives the steam turbine (4) to rotate. The output shaft of the steam turbine (4) drives the working fluid pump (2) to rotate through the first connecting rod (6.1), and the output shaft of the steam turbine (4) drives the refrigeration compressor (7) to rotate through the second connecting rod (6.2). The steam that has completed its work enters the condenser (5) through the exhaust port of the steam turbine (4) and the working fluid inlet of the condenser (5) to release heat and condense. After flowing out through the working fluid outlet of the condenser (5), it is pressurized by the working fluid pump (2) and sent back to the evaporator (3) to achieve circulation. The refrigeration compressor (7) compresses and heats the gaseous refrigerant inside. The compressed and heated gaseous refrigerant enters the refrigeration condenser (8) through the exhaust port of the refrigeration compressor (7) and the working fluid inlet of the refrigeration condenser (8). The compressed and heated gaseous refrigerant releases heat and liquefies in the refrigeration condenser (8). Then, it expands adiabatically through the expansion valve (9) and then depressurizes and cools down to form a low-temperature and low-pressure two-phase refrigerant. The two-phase refrigerant enters the refrigeration evaporator (10) through the refrigerant inlet. The two-phase refrigerant absorbs heat from the ocean ranch ice-making chamber (11) in the refrigeration evaporator (10) and becomes a gaseous refrigerant. At the same time, it lowers the temperature of the ocean ranch ice-making chamber (11) to below the freezing point, realizing the water freezing and ice-making functions. The gaseous refrigerant enters the refrigeration evaporator (10) through the refrigerant outlet of the refrigeration evaporator (10) to achieve circulation.

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