A deep-sea phase-change heat and cold storage device and its operation method

Abstract

A deep-sea phase-change heat and cold storage device and an operating method thereof, comprising an outer shell placed in the deep sea, wherein the inner wall surface of the outer shell is coated with an insulation layer, which blocks heat transfer between the interior of the outer shell and the outside world; a plurality of heat-conducting layers are evenly and staggeredly arranged in a transverse direction from top to bottom inside the outer shell, wherein the heat-conducting layers are hollow, thin-walled rectangular structures, an outer shell serving as a phase change unit is installed inside the heat-conducting layer, a high-temperature phase change unit or a low-temperature phase change unit is installed inside the heat-conducting layer, and a heat exchange zone is formed outside the heat-conducting layer; an inlet is provided at the top of the outer shell, an inlet tee is installed at the inlet, a medium inlet valve and a water pump are installed at the medium inlet of the inlet tee, and a seawater inlet valve is installed at the seawater inlet of the inlet tee; an outlet is provided at the bottom of the outer shell, an outlet tee is installed at the outlet, a seawater outlet valve is installed at the seawater outlet of the outlet tee, and a medium outlet valve is installed at the medium outlet end of the outlet tee, which has reliable operation and simple operation.

Description

Technical Field

[0001] The present invention relates to the technical field of deep-sea equipment, and in particular to a deep-sea phase-change heat and cold storage device and an operating method thereof. Background Art

[0002] Temperature gradient, the temperature change trend is that the seawater temperature decreases with increasing depth. Take the South China Sea in summer as an example: the water surface temperature is 29 degrees Celsius, the water temperature at a depth of 1000 meters is 4.5 degrees Celsius, and the water temperature at a depth of 2000 meters is 2.4 degrees Celsius. In order to ensure the normal operation of the equipment and the comfort of personnel, the deep-sea manned platform (hereinafter referred to as the "platform") should maintain the temperature within a certain range, usually 20 degrees Celsius to 27 degrees Celsius. The trend of seawater temperature change leads to a large difference in the heat load of the platform on the water surface and in the deep sea. When the air conditioning device is turned off, the temperature of the surface working cabin is higher than the design temperature range.

[0003] The cabin temperature in deep-sea working conditions is lower than the design temperature range. The air conditioning device controls the cabin temperature within the design range through surface cooling and underwater heating. This process requires the consumption of electricity. For non-nuclear powered platforms, electricity is the only form of energy source and its reserves are limited.

[0004] In order to reduce power consumption, the present invention provides a deep-sea phase-change heat and cold storage device and an operating method. Summary of the Invention

[0005] In response to the shortcomings of the above-mentioned existing production technology, the applicant provides a deep-sea phase change heat and cold storage device and its operation method, which can conveniently provide heat and cold for the platform in the deep sea. It has the characteristics of good working reliability, simple structure, reliable principle, and energy saving.

[0006] The technical solutions adopted in the present invention are as follows:

[0007] A deep-sea phase-change heat and cold storage device comprises an outer shell placed in the deep sea, the inner wall surface of the outer shell being coated with an insulation layer, the insulation layer blocking heat transfer between the inside of the outer shell and the outside; a plurality of heat-conducting layers are evenly and staggeredly arranged in a transverse direction from top to bottom inside the outer shell, the heat-conducting layer being a hollow, thin-walled rectangular structure, an outer shell serving as a phase change unit being installed inside the heat-conducting layer, a high-temperature phase change unit or a low-temperature phase change unit being installed inside the heat-conducting layer, and a heat exchange zone being formed outside the heat-conducting layer; an inlet is provided at the top of the outer shell, an inlet tee is installed at the inlet, a medium inlet valve and a water pump are installed at the medium inlet of the inlet tee, and a seawater inlet valve is installed at the seawater inlet of the inlet tee; an outlet is provided at the bottom of the outer shell, an outlet tee is installed at the outlet, a seawater outlet valve is installed at the seawater outlet of the outlet tee, and a medium outlet valve is installed at the medium outlet end of the outlet tee.

[0008] Its further technical solution is:

[0009] The high-temperature phase-change units or the low-temperature phase-change units are distributed at intervals in the heat-conducting layer.

[0010] The structure of the high-temperature phase change unit is as follows: it includes a No. 1 unit shell, the interior of the No. 1 unit shell is filled with a No. 1 phase change material, and the No. 1 unit shell is made of a high thermal conductivity material.

[0011] The structure of the low-temperature phase change unit is: including a No. 2 unit shell and a No. 2 phase change material, wherein the No. 2 unit shell is filled with the No. 2 phase change material, and the No. 2 unit shell is made of a high thermal conductivity material.

[0012] An inlet temperature sensor is installed on the inlet tee.

[0013] An outlet temperature sensor is installed on the outlet tee.

[0014] The heat-insulating layer is made of corrosion-resistant material with low thermal conductivity, and the heat-conducting layer is made of corrosion-resistant material with high thermal conductivity.

[0015] The outer shell is made of high-strength and corrosion-resistant material.

[0016] The cross section of the outer shell is a rectangular structure.

[0017] A method for operating a deep-sea phase change heat and cold storage device comprises the following steps:

[0018] Preparation: Before activation, the medium inlet valve, medium outlet valve, seawater inlet valve and seawater outlet valve are all in the closed state;

[0019] Preparation for diving: The platform is in a high-temperature seawater environment on the water surface. The operation process for storing thermal energy is as follows: open the seawater inlet valve and the seawater outlet valve to allow the high-temperature seawater to exchange heat with the high-temperature phase change unit, the low-temperature phase change unit, and the seawater to store thermal energy. After the storage is completed, close the seawater inlet valve and the seawater outlet valve.

[0020] Diving work:

[0021] When the platform dives to a depth greater than 1,000 meters, the heat energy release operation process is as follows: open the medium inlet valve and the medium outlet valve to allow the medium to exchange heat with the high-temperature phase change unit and the low-temperature phase change unit. The phase change unit transfers the heat energy to the medium and transports it to the location where the heat energy is needed. After completion, close the medium inlet valve and the medium outlet valve;

[0022] Cold energy storage operation process: open the seawater inlet valve and the seawater outlet valve to allow the seawater to exchange heat with the high-temperature phase change unit and the low-temperature phase change unit to store cold energy. After completion, close the seawater inlet valve and the seawater outlet valve;

[0023] When the platform floats to the water surface, the cold energy is released. The operation process is as follows: open the medium inlet valve and the medium outlet valve to allow the medium to exchange heat with the high-temperature phase change unit and the low-temperature phase change unit. The phase change unit transfers the cold energy to the medium and transports it to the location where the cold energy is needed. After completion, close the medium inlet valve and the medium outlet valve.

[0024] The beneficial effects of the present invention are as follows:

[0025] The present invention has a compact and reasonable structure and is easy to operate. By arranging a high-temperature phase change unit and a low-temperature phase change unit in the outer shell and forming a heat exchange zone between the high-temperature phase change unit and the low-temperature phase change unit, the required cooling and heating can be conveniently provided to the platform at the water surface and deep sea locations respectively. It has low power consumption and has the characteristics of good working reliability, simple structure, reliable principle, energy saving, etc.

[0026] The present invention uses seawater as a cold source and a heat source, and has high reliability.

[0027] The present invention adopts corrosion-resistant and pollution-free materials and can be operated safely in deep sea areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the present invention.

[0029] Figure 2 Schematic diagram of the structure of the high-temperature phase change unit of the present invention.

[0030] Figure 3 Schematic diagram of the structure of the low-temperature phase change unit of the present invention.

[0031] Wherein: 1. Outer shell; 2. Insulation layer; 3. Heat-conducting layer; 4. High-temperature phase change unit; 5. Water pump; 6. Medium inlet valve; 7. Inlet tee; 8. Seawater inlet valve; 9. Inlet temperature sensor; 10. Heat exchange area; 11. Low-temperature phase change unit; 12. Outlet temperature sensor; 13. Seawater outlet valve; 14. Outlet tee; 15. Medium outlet valve.

[0032] 401. Unit No. 1 housing; 402. Phase change material No. 1;

[0033] 1101. Unit No. 1 housing; 1102. Phase change material No. 2. DETAILED DESCRIPTION

[0034] The specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0035] like Figure 1 、 Figure 2 and Figure 3As shown, the deep-sea phase change heat and cold storage device of this embodiment includes an outer shell 1 placed in the deep sea, and the inner wall surface of the outer shell 1 is coated with an insulation layer 2, which blocks the heat transfer between the inside of the outer shell 1 and the outside world; a plurality of heat-conducting layers 3 are evenly spaced and staggered in the transverse direction from top to bottom inside the outer shell 1, and the heat-conducting layer 3 is a hollow thin-walled rectangular structure. The outer shell of the phase change unit is installed inside the heat-conducting layer 3, and a high-temperature phase change unit 4 or a low-temperature phase change unit 11 is installed inside the heat-conducting layer 3, and a heat exchange area 10 is formed outside the heat-conducting layer 3; an inlet is provided at the top of the outer shell 1, and an inlet tee 7 is installed at the inlet, a medium inlet valve 6 and a water pump 5 are installed at the medium inlet of the inlet tee 7, and a seawater inlet valve 8 is installed at the seawater inlet of the inlet tee 7; an outlet is provided at the bottom of the outer shell 1, an outlet tee 14 is installed at the outlet, a seawater outlet valve 13 is installed at the seawater outlet of the outlet tee 14, and a medium outlet valve 15 is installed at the medium outlet end of the outlet tee 14.

[0036] The high-temperature phase change units 4 or the low-temperature phase change units 11 are distributed at intervals in the heat conducting layer 3 .

[0037] The structure of the high-temperature phase change unit 4 is as follows: it includes a No. 1 unit shell 401 , the interior of which is filled with a No. 1 phase change material 402 , and the No. 1 unit shell 401 is made of a material with a high thermal conductivity coefficient.

[0038] The structure of the low-temperature phase change unit 11 is as follows: it includes a No. 2 unit shell 1101 and a No. 2 phase change material 1102 , wherein the No. 2 unit shell 1101 is filled with the No. 2 phase change material 1102 , and the No. 2 unit shell 1101 is made of a material with high thermal conductivity.

[0039] An inlet temperature sensor 9 is installed on the inlet tee 7 .

[0040] An outlet temperature sensor 12 is installed on the outlet tee 14 .

[0041] The heat-insulating layer 2 is made of corrosion-resistant, low-thermal-conductivity material, and the heat-conducting layer 3 is made of corrosion-resistant, high-thermal-conductivity material.

[0042] The outer shell 1 is made of high-strength, corrosion-resistant material.

[0043] The cross section of the outer shell 1 is a rectangular structure.

[0044] The operating method of the deep-sea phase change heat and cold storage device of this embodiment includes the following operating steps:

[0045] Preparation: Before activation, the medium inlet valve 6, medium outlet valve 15, seawater inlet valve 8, and seawater outlet valve 13 are all in the closed state;

[0046] Preparation for diving: The platform is in a high-temperature seawater environment on the water surface. The operation process for storing thermal energy is as follows: open the seawater inlet valve 8 and the seawater outlet valve 13 to allow the high-temperature seawater to exchange heat with the high-temperature phase change unit 4, the low-temperature phase change unit 11, and the seawater to store thermal energy. After the storage is completed, close the seawater inlet valve 8 and the seawater outlet valve 13.

[0047] Diving work:

[0048] When the platform dives to a depth greater than 1000 meters, the heat energy release operation process is as follows: open the medium inlet valve 6 and the medium outlet valve 15 to allow the medium to exchange heat with the high-temperature phase change unit 4 and the low-temperature phase change unit 11. The phase change unit transfers heat energy to the medium and transports it to the location where heat energy is needed. After completion, close the medium inlet valve 6 and the medium outlet valve 15.

[0049] Cold energy storage operation process: open the seawater inlet valve 8 and the seawater outlet valve 13 to allow the seawater to exchange heat with the high-temperature phase change unit 4 and the low-temperature phase change unit 11 to store cold energy. After completion, close the seawater inlet valve 8 and the seawater outlet valve 13;

[0050] When the platform floats to the water surface, the cold energy release operation process is as follows: open the medium inlet valve 6 and the medium outlet valve 15, so that the medium exchanges heat with the high-temperature phase change unit 4 and the low-temperature phase change unit 11. The phase change unit transfers the cold energy to the medium and transports it to the location where the cold energy is needed. After completion, close the medium inlet valve 6 and the medium outlet valve 15.

[0051] The specific structure and functions of the deep-sea phase change heat and cold storage device described in the present invention are as follows:

[0052] It mainly includes an outer shell 1, an insulation layer 2, a heat-conducting layer 3, a high-temperature phase change unit 4, a water pump 5, a medium inlet valve 6, an inlet tee 7, a seawater inlet valve 8, an inlet temperature sensor 9, a heat exchange area 10, a low-temperature phase change unit 11, an outlet temperature sensor 12, a seawater outlet valve 13, an outlet tee 14, and a medium outlet valve 15.

[0053] This device is designed for use in deep-sea environments. The outer shell 1 is constructed from high-strength, corrosion-resistant materials to withstand seawater pressure and corrosion, protecting the internal structure. An insulation layer 2, applied within the outer shell 1, blocks heat transfer from the device's interior through the outer shell 1 to the outside world. This layer is constructed from corrosion-resistant, low-thermal-conductivity materials. The thermal conductive layer 3, the outer shell of the phase-change unit, serves as the heat transfer path between the device's internal phase-change material, the medium, and seawater. It is constructed from corrosion-resistant, high-thermal-conductivity materials.

[0054] The high-temperature phase change unit 4 includes a No. 1 unit shell 401 and a No. 1 phase change material 402 , wherein the No. 1 unit shell 401 is filled with the No. 1 phase change material 402 , and the No. 1 unit shell 401 is made of a high thermal conductivity material.

[0055] The water pump 5 is located at the medium inlet, providing power for the medium to flow. The medium inlet valve 6, located at the medium inlet of the inlet tee 7, is used to open and close the medium inlet passage. The inlet tee 7 is located at the device inlet, providing inlet passages for the medium and seawater. The seawater inlet valve 8, located at the seawater inlet of the inlet tee 7, is used to open and close the seawater inlet passage. The heat exchange zone 10 is a closed loop formed by the device's outer shell 1 and the heat conductive layer 3, providing a heat transfer path for heat exchange between the medium and the device, and between seawater and the device.

[0056] Among them, the low-temperature phase change unit 11 includes a No. 2 unit shell 1101 and a No. 2 phase change material 1102, wherein the No. 2 unit shell 1101 is filled with the No. 2 phase change material 1102, and the No. 2 unit shell 1101 is made of high thermal conductivity material, the same as the No. 1 unit shell 401.

[0057] An outlet temperature sensor 12 is located at the outlet of the heat exchange zone 10 and is used to sense the temperatures of the medium and seawater. A seawater outlet valve 13 is located at the seawater outlet of the outlet tee 14 and is used to open and close the seawater outlet passage. The outlet tee 14 is located at the outlet of the heat exchange zone 10 and provides outlet passages for the medium and seawater, respectively. A medium outlet valve 15 is located at the medium outlet end of the outlet tee 14 and is used to open and close the medium outlet passage.

[0058] The heat-conducting layer 3 is welded to form a sealed rectangular cavity and fixed to the inner wall of the device by welding. The high-temperature phase change unit 4 and the low-temperature phase change unit 11 are installed inside the cavity. The outer wall of the cavity and the inner wall of the device together form a heat exchange area 10.

[0059] Warmer seawater enters the device's heat exchange zone 10 through the seawater inlet valve 8. It then exchanges heat with the phase-change material in the high-temperature phase-change unit 4 through the heat-conducting layer 3. The high-temperature seawater releases heat energy, which the phase-change material absorbs, undergoing a physical change and storing it. After the phase-change material undergoes a full phase change, the seawater inlet valve 8 and the seawater outlet valve 13 are closed. The outer shell 1, the internal insulation layer 2, and the seawater filling the heat exchange zone 10 block heat transfer between the phase-change material and the external seawater, allowing the heat energy to be stored in the phase-change material.

[0060] Open the medium inlet valve 6 and medium outlet valve 15. The higher-temperature seawater in the heat exchange zone 10 flows out of the device under the action of the water pump 5 and reaches the location where heat energy is needed for heat exchange. The platform heat exchange medium enters the device under the action of the water pump 5, exchanges heat with the phase change material, absorbs the heat energy from the phase change material, and is then transported to the location where heat energy is needed. The phase change material undergoes a physical phase change, releasing heat energy. After the phase change is complete, the medium inlet valve 6 and medium outlet valve 15 are closed.

[0061] Cooler seawater enters the device's heat exchange zone 10 through the seawater inlet valve 8. It then exchanges heat with the phase-change material in the high-temperature phase-change unit 4 through the heat-conducting layer 3. The low-temperature seawater releases cold energy, which the phase-change material absorbs, undergoing a physical phase change and storing it. After the phase-change material undergoes a complete phase change, the seawater inlet valve 8 and the seawater outlet valve 13 are closed. The outer shell 1, the internal insulation layer 2, and the seawater filling the heat exchange zone 10 block heat transfer between the phase-change material and the external seawater, allowing the cold energy to be stored in the phase-change material.

[0062] Open the medium inlet valve 6 and the medium outlet valve 15. The platform's heat exchange medium, driven by the water pump 5, enters the device, exchanges heat with the phase-change material, absorbs the cold energy from the phase-change material, and is then transported to the location where the cold energy is needed. The phase-change material undergoes a physical phase change, releasing the cold energy. After the phase change is complete, close the medium inlet valve 6 and the medium outlet valve 15.

[0063] The first phase change material 402 of the high-temperature phase change unit 4 is paraffin RT27, which has a phase change temperature of 25 degrees Celsius. When the high-temperature phase change unit 4 exchanges heat with seawater above 25 degrees Celsius through the heat-conducting layer 3, the high-temperature phase change material transforms from solid to liquid, storing thermal energy. After the seawater inlet valve 8 and the seawater outlet valve 13 are closed, the high-temperature phase change unit 4 stores thermal energy thanks to the triple insulation effect of the high-temperature seawater in the outer shell 1, the insulation layer 2, and the heat exchange zone 10. When the high-temperature phase change unit 4 exchanges heat with seawater below 25 degrees Celsius through the heat-conducting layer 3, the high-temperature phase change material transforms from liquid to solid, storing cold energy. After the seawater inlet valve 8 and the seawater outlet valve 13 are closed, the high-temperature phase change unit 4 stores cold energy thanks to the triple insulation effect of the low-temperature seawater in the outer shell 1, the insulation layer 2, and the heat exchange zone 10.

[0064] The second phase change material 1102 of the low-temperature phase change unit 11 is paraffin RT6, which has a phase change temperature of 8 degrees Celsius. When the low-temperature phase change unit 11 exchanges heat with seawater below 8 degrees Celsius through the thermal conductive layer 3, the low-temperature phase change material transforms from liquid to solid, storing cold energy. After the seawater inlet valve 8 and the seawater outlet valve 13 are closed, the low-temperature phase change unit 11 stores cold energy thanks to the triple insulation effect of the outer shell 1, the thermal insulation layer 2, and the low-temperature seawater in the heat exchange zone 10. When the low-temperature phase change unit 11 exchanges heat with seawater above 8 degrees Celsius through the thermal conductive layer 3, the low-temperature phase change material transforms from solid to liquid, storing heat energy. After the seawater inlet valve 8 and the seawater outlet valve 13 are closed, the low-temperature phase change unit 11 stores heat energy thanks to the triple insulation effect of the outer shell 1, the thermal insulation layer 2, and the high-temperature seawater in the heat exchange zone 10.

[0065] During the device's heat energy storage process, the low-temperature phase change unit 11 stores most of the cold energy, and the high-temperature phase change unit 4 stores a small portion of heat energy. During the device's cold energy storage process, the high-temperature phase change unit 4 stores most of the cold energy, and the low-temperature phase change unit 11 stores a small portion of the cold energy.

[0066] When storing energy: when the readings of the inlet temperature sensor 9 and the outlet temperature sensor 12 are consistent, the phase change is sufficient, and the seawater inlet valve 8 and the seawater outlet valve 13 are closed to store energy.

[0067] When releasing energy: when the readings of the inlet temperature sensor 9 and the outlet temperature sensor 12 are consistent, the medium inlet valve 6 and the medium outlet valve 15 are closed, the phase change is complete, the seawater inlet valve 8 and the seawater outlet valve 13 are opened, and the energy release is completed.

[0068] The unit housing 401 of the high-temperature phase change unit 4 and the first unit housing 1101 of the low-temperature phase change unit 11 are made of polyethylene plastic bottles, which encapsulate the high-temperature phase change material and the low-temperature phase change material and are then installed in the inner cavity of the heat conducting layer 3 .

[0069] The outer shell 1 can be a rectangular body, and can also be other shapes when the device needs to conform to the platform shell.

[0070] In actual work process:

[0071] The deep-sea phase-change heat and cold storage device of the present invention is used in a deep-sea platform.

[0072] Before activation, the medium inlet valve 6, the medium outlet valve 15, the seawater inlet valve 8, and the seawater outlet valve 13 are all in a closed state.

[0073] (1) When preparing for diving, the platform is in a high-temperature seawater environment on the water surface. The operation process for storing thermal energy is as follows: open the seawater inlet valve 8 and the seawater outlet valve 13 to allow the high-temperature seawater to exchange heat with the high-temperature phase change unit 4, the low-temperature phase change unit 11 and the seawater to store thermal energy. When the inlet temperature sensor 9 and the outlet temperature sensor 12 show the same value for more than 8 minutes, close the seawater inlet valve 8 and the seawater outlet valve 13.

[0074] (2) When the platform descends to a depth greater than 1000 meters, the following operating procedures are in place to release thermal energy: Open the medium inlet valve 6 and the medium outlet valve 15 to allow the medium to exchange heat with the high-temperature phase change unit 4 and the low-temperature phase change unit 11. The phase change unit transfers thermal energy to the medium and transports it to the location where the thermal energy is needed. If the inlet temperature sensor 9 and the outlet temperature sensor 12 show the same reading for more than 8 minutes, close the medium inlet valve 6 and the medium outlet valve 15.

[0075] (3) Cold energy storage operation process: open the seawater inlet valve 8 and the seawater outlet valve 13 to allow the seawater to exchange heat with the high-temperature phase change unit 4 and the low-temperature phase change unit 11 to store cold energy. When the inlet temperature sensor 9 and the outlet temperature sensor 12 show the same value for more than 8 minutes, close the seawater inlet valve 8 and the seawater outlet valve 13.

[0076] (4) When the platform reaches the surface, the cold energy release process begins: Open the medium inlet valve 6 and the medium outlet valve 15 to allow the medium to exchange heat with the high-temperature phase change unit 4 and the low-temperature phase change unit 11. The phase change unit transfers cold energy to the medium and delivers it to the location where the cold energy is needed. If the inlet temperature sensor 9 and the outlet temperature sensor 12 show the same reading for more than 8 minutes, close the medium inlet valve 6 and the medium outlet valve 15.

[0077] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any modifications may be made within the scope of protection of the present invention.

Claims

1. A deep-sea phase change heat and cold storage device, characterized by: The invention comprises an outer shell (1) placed in the deep sea, wherein the inner wall surface of the outer shell (1) is provided with a heat-insulating layer (2), and the heat-insulating layer (2) blocks the heat transfer between the inner shell (1) and the outside; a plurality of heat-conducting layers (3) are arranged in a uniform and staggered manner from top to bottom in the inner lateral direction of the outer shell (1), the heat-conducting layer (3) is a hollow thin-walled rectangular structure, an outer shell as a phase change unit is installed inside the heat-conducting layer (3), a high-temperature phase change unit (4) or a low-temperature phase change unit (11) is installed inside the heat-conducting layer (3), and a heat exchange zone (10) is formed outside the heat-conducting layer (3), the high-temperature phase change unit (4) contains paraffin RT27 with a phase change temperature of 25°C, and the low-temperature phase change unit (11) contains paraffin RT6 with a phase change temperature of 8°C; the heat exchange zone (10), the outer shell (1) and the heat-insulating layer (2) together constitute a triple heat-insulating structure; the outer shell ( 1) is provided with an inlet at the top, an inlet tee (7) is installed at the inlet, a medium inlet valve (6) and a water pump (5) are installed at the medium inlet of the inlet tee (7), and a seawater inlet valve (8) is installed at the seawater inlet of the inlet tee (7); an outlet is provided at the bottom of the outer shell (1), an outlet tee (14) is installed at the outlet, a seawater outlet valve (13) is installed at the seawater outlet of the outlet tee (14), and a medium outlet valve (15) is installed at the medium outlet end of the outlet tee (14); the high-temperature phase change unit (4) or the low-temperature phase change unit (11) is distributed in the heat-conducting layer (3) at intervals; the structure of the high-temperature phase change unit (4) is as follows: it includes a No. 1 unit shell (401), the interior of the No. 1 unit shell (401) is filled with a No. 1 phase change material (402), and the No. 1 unit shell (401) is made of a material with a high thermal conductivity coefficient; The operation method includes the following steps: Preparation: Before activation, the medium inlet valve (6), medium outlet valve (15), seawater inlet valve (8), and seawater outlet valve (13) are all in the closed state; Preparation for diving: The platform is in a high-temperature seawater environment on the water surface, and the heat energy storage operation process is as follows: the seawater inlet valve (8) and the seawater outlet valve (13) are opened to exchange heat between the high-temperature seawater and the high-temperature phase change unit (4), the low-temperature phase change unit (11) and the seawater to store heat energy. After the storage is completed, the seawater inlet valve (8) and the seawater outlet valve (13) are closed; Diving work: When the platform dives to a depth greater than 1000 meters, the heat energy release operation process is as follows: the medium inlet valve (6) and the medium outlet valve (15) are opened to allow the medium to exchange heat with the high-temperature phase change unit (4) and the low-temperature phase change unit (11). The phase change unit transfers heat energy to the medium and transports it to the location where heat energy is needed. After completion, the medium inlet valve (6) and the medium outlet valve (15) are closed. Cold energy storage operation process: open the seawater inlet valve (8) and the seawater outlet valve (13) to allow the seawater to exchange heat with the high-temperature phase change unit (4) and the low-temperature phase change unit (11) to store cold energy. After completion, close the seawater inlet valve (8) and the seawater outlet valve (13); When the platform floats to the water surface, the cold energy is released. The operation process is as follows: the medium inlet valve (6) and the medium outlet valve (15) are opened to allow the medium to exchange heat with the high-temperature phase change unit (4) and the low-temperature phase change unit (11). The phase change unit transfers the cold energy to the medium and transports it to the location where the cold energy is needed. After completion, the medium inlet valve (6) and the medium outlet valve (15) are closed.

2. The deep-sea phase-change heat and cold storage device according to claim 1, characterized in that: The structure of the low-temperature phase change unit (11) is as follows: it comprises a No. 2 unit shell (1101) and a No. 2 phase change material (1102), wherein the No. 2 unit shell (1101) is filled with the No. 2 phase change material (1102), and the No. 2 unit shell (1101) is made of a high thermal conductivity material.

3. The deep-sea phase change heat and cold storage device according to claim 1, characterized in that: An inlet temperature sensor (9) is installed on the inlet tee (7).

4. The deep-sea phase-change heat and cold storage device according to claim 1, characterized in that: An outlet temperature sensor (12) is installed on the outlet tee (14).

5. The deep-sea phase-change heat and cold storage device according to claim 1, characterized in that: The thermal insulation layer (2) is made of corrosion-resistant, low-thermal-conductivity material, and the thermal-conducting layer (3) is made of corrosion-resistant, high-thermal-conductivity material.

6. The deep-sea phase-change heat and cold storage device according to claim 1, characterized in that: The outer shell (1) is made of high-strength, corrosion-resistant material.

7. The deep-sea phase-change heat and cold storage device according to claim 1, characterized in that: The cross section of the outer shell (1) is a rectangular structure.

Images