WO2021017818A1

WO2021017818A1 - Heat exchange apparatus for ocean thermal energy conversion

Info

Publication number: WO2021017818A1
Application number: PCT/CN2020/101909
Authority: WO
Inventors: 李铁键; 孙玉山; 黄跃飞; 魏加华; 张国成; 吴新雨
Original assignee: 清华大学; 哈尔滨工程大学
Priority date: 2019-08-01
Filing date: 2020-07-14
Publication date: 2021-02-04
Also published as: CN110513256A; CN110513256B

Abstract

A heat exchange apparatus for ocean thermal energy conversion comprises an outer pressure-resistant housing (1), an inner pressure-resistant housing (2), a first thermally conductive plate (3), a second thermally conductive plate (4), a thermoelectric power generation sheet (5), a phase-change material (6), a rubber hose (7), hydraulic oil (8), a through-cabin connector (9), heat transfer oil (10), and a thermally conductive sheet (11). The thermoelectric power generation sheet is provided between the outer pressure-resistant housing and the inner pressure-resistant housing, and is connected to the first thermally conductive plate and the second thermally conductive plate. The first thermally conductive plate is provided between the thermoelectric power generation sheet and the outer pressure-resistant housing. The second thermally conductive plate is provided between the thermoelectric power generation sheet and the inner pressure-resistant housing. The heat transfer oil is provided between the outer pressure-resistant housing and the inner pressure-resistant housing. The phase-change material, the rubber hose, and the thermally conductive sheet are provided in the inner pressure-resistant housing. The thermally conductive sheet is connected to the inner pressure-resistant housing. The hydraulic oil is provided in the rubber hose. The through-cabin connector is provided at the top of the heat exchange apparatus. The apparatus efficiently captures thermal gradient energy, and uses the thermoelectric power generation sheet to generate electricity, thereby improving the endurance of underwater unmanned submersibles such as an underwater glider, a profile buoy, etc.

Description

Heat exchange device for generating electricity by ocean temperature difference energy

Cross references to related applications

This application claims the priority of the Chinese patent application number "201910707307.8", which was submitted by Tsinghua University on August 1, 2019, with the title of "Heat Exchange Device for Ocean Thermal Power Generation".

Technical field

This application relates to the field of clean energy power generation technology, and in particular to a heat exchange device for ocean thermal power generation.

Background technique

For a long time, unmanned underwater vehicles have used batteries as driving energy to provide electrical energy for the propulsion unit, navigation control unit and other sensors. Due to the limited battery energy of the unmanned underwater vehicle, the endurance of the unmanned underwater vehicle is restricted. Therefore, it is necessary to solve the problem of the endurance of the unmanned underwater vehicle.

Summary of the invention

This application aims to solve one of the technical problems in the related technology at least to a certain extent.

For this reason, the purpose of this application is to propose a heat exchange device for ocean thermal energy generation, which can improve the ability of the thermal energy heat exchanger to capture ocean thermal energy and improve the endurance of an underwater observation platform.

In order to achieve the foregoing objectives, one embodiment of the present application proposes a heat exchange device for generating electricity from ocean thermal energy, including:

Outer pressure shell, inner pressure shell, first heat conduction plate, second heat conduction plate, thermoelectric power generation sheet, phase change material, rubber hose, hydraulic oil, through-cabin connector, heat carrier oil and heat conduction sheet;

The thermoelectric power generation sheet is arranged between the outer pressure-resistant shell and the inner pressure-resistant shell, the first heat conducting plate is arranged between the thermoelectric power generation sheet and the outer pressure-resistant shell, and the thermoelectric power generation sheet The second heat conducting plate is arranged between the inner pressure-resistant shell;

The outer side of the thermoelectric power sheet is connected to the first heat conducting plate, the first heat conducting plate is connected to the outer pressure shell, the inner side of the thermoelectric power sheet is connected to the second heat conducting plate, and the second heat conducting plate Connecting the inner pressure shell;

The heat carrier oil is arranged between the outer pressure shell and the inner pressure shell;

The phase change material, the rubber hose and the heat conducting sheet are arranged inside the inner pressure-resistant shell, the heat conducting sheet is connected to the inner pressure-proof shell, and the hydraulic oil is arranged on the rubber hose internal;

The through-cabin connector is arranged on the top of the heat exchange device.

The heat exchange device for ocean thermoelectric power generation in the embodiments of the present application realizes the high-efficiency capture of thermoelectric energy. The thermoelectric power sheet is used to generate electricity, and the thermoelectric energy is converted into electric energy. The heat conducting sheet is used in the inner pressure chamber to accelerate the phase change material. In the process of phase change, the capture of temperature difference energy is completed faster. The use of this temperature difference energy heat exchanger can better improve the endurance of underwater unmanned submersibles such as underwater gliders and profile buoys.

In addition, the heat exchange device for generating electricity based on ocean thermal energy according to the above embodiments of the present application may also have the following additional technical features:

Further, in an embodiment of the present application, the outer pressure-resistant shell and the inner pressure-resistant shell are cylindrical.

Further, in an embodiment of the present application, the thermoelectric power generation sheet is arranged on a side between the outer pressure shell and the inner pressure shell, occupying the outer pressure shell and the inner pressure shell. One half of the side space between the pressure shells.

Further, in an embodiment of the present application, the heat carrier oil is arranged on the other side between the outer pressure shell and the inner pressure shell, occupying the outer pressure shell and the inner pressure shell. Half of the side space between the pressure shells.

Further, in an embodiment of the present application, the thermally conductive sheet is used to accelerate the phase change process of the phase change material.

Further, in an embodiment of the present application, when the temperature of the marine environment where the heat exchange device is located is greater than the solidification temperature of the phase change material, the phase change material is in a liquid state, and the inner pressure shell When the pressure of the rubber hose increases, the hydraulic oil in the rubber hose is squeezed out of the rubber hose;

When the temperature of the marine environment where the heat exchange device is located is lower than the solidification temperature of the phase change material, the phase change material solidifies, the pressure in the inner pressure-resistant shell decreases, and the hydraulic oil flows back to the soft rubber tube.

Further, in an embodiment of the present application, the heat carrier oil is used to accelerate the conduction of heat between the outer pressure-resistant shell and the inner pressure-resistant shell.

Further, in an embodiment of the present application, the thermally conductive sheet is used to accelerate the conduction of heat between the inner pressure shell and the phase change material.

Further, in an embodiment of the present application, the through-cabin connector is used for communicating the heat exchange device with other devices.

The additional aspects and advantages of this application will be partly given in the following description, and some will become obvious from the following description, or be understood through the practice of this application.

Description of the drawings

The above and/or additional aspects and advantages of the present application will become obvious and easy to understand from the following description of the embodiments in conjunction with the accompanying drawings, in which:

Fig. 1 is a structural diagram of a heat exchange device for generating electricity from ocean thermal energy according to an embodiment of the present application;

2 is a structural schematic diagram of the melting state of the phase change material inside the heat exchange device for ocean thermal power generation according to an embodiment of the present application;

Fig. 3 is a schematic view of the solidified structure of the phase change material inside the heat exchange device for ocean thermal power generation according to an embodiment of the present application.

Reference signs: outer pressure shell-1, inner pressure shell-2, first heat conducting plate-3, second heat conducting plate-4, thermoelectric power generation sheet-5, phase change material-6, rubber hose-7, Hydraulic oil-8, through-cabin connector-9, heat carrier oil-10 and thermal conductive sheet-11.

Detailed ways

The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the application, but should not be understood as a limitation to the application.

The following describes the heat exchange device for generating electricity with ocean temperature difference according to the embodiments of the present application with reference to the drawings.

Fig. 1 is a structural diagram of a heat exchange device for generating electricity by ocean temperature difference energy according to an embodiment of the present application.

As shown in Figure 1, the heat exchange device for ocean thermal power generation includes: an outer pressure shell 1, an inner pressure shell 2, a first heat conducting plate 3, a second heat conducting plate 4, a thermoelectric power generation sheet 5, and a phase change material 6. , Rubber hose 7, hydraulic oil 8, through-cabin connector 9, heat carrier oil 10 and heat conducting sheet 11.

Among them, the outer pressure shell 1 and the inner pressure shell 2 are cylindrical.

The thermoelectric power generation sheet 5 is arranged between the outer pressure-resistant shell 1 and the inner pressure-resistant shell 2, and a first heat conducting plate 3 is arranged between the thermoelectric power sheet 5 and the outer pressure-resistant shell 1. Set a second heat conducting plate 4 between;

The outside of the thermoelectric power sheet 5 is connected to the first heat conducting plate 3, the first heat conducting plate 3 is connected to the outer pressure shell 1, the inside of the thermoelectric power sheet 5 is connected to the second heat conducting plate 4, and the second heat conducting plate 4 is connected to the inner pressure shell 2; There is a temperature difference on both sides of the thermoelectric power generation sheet 5, and the temperature difference is used to generate electricity, and the temperature difference energy is converted into electric energy;

The heat carrier oil 10 is arranged between the outer pressure shell 1 and the inner pressure shell 2;

The phase change material 6, the rubber hose 7 and the thermal conductive sheet 11 are arranged inside the inner pressure resistant shell 2, the thermal conductive sheet 11 is connected to the inner pressure resistant shell 2, and the hydraulic oil 8 is arranged inside the rubber hose 7;

The through-cabin connector 9 is arranged on the top of the heat exchange device.

Specifically, as shown in FIG. 1, FIG. 2 and FIG. 3, the thermoelectric power generation sheet 5 is located between the inner pressure-resistant shell 2 and the outer pressure-resistant shell 1, and is closely attached to the outer pressure-resistant shell 1 through the first heat conducting plate 3. It is tightly attached to the inner pressure shell 2 through the second heat conducting plate 4, and the second heat conducting plate 4 facilitates the heat conduction between the inner pressure shell 2 and the outer pressure shell 1.

The thermoelectric power generation sheet 5 is arranged on the side between the outer pressure shell 1 and the inner pressure shell 2 and occupies one half of the side space between the outer pressure shell 1 and the inner pressure shell 2.

The heat carrier oil 10 is located between the inner pressure shell 2 and the outer pressure shell 1 and is isolated from the thermoelectric power generation sheet 5, occupying the remaining space between the inner pressure shell 2 and the outer pressure shell 1, and accelerating the heat transfer rate.

It can be understood that the heat carrier oil 10 is arranged on the other side between the outer pressure shell 1 and the inner pressure shell 2 and occupies half of the side space between the outer pressure shell 1 and the inner pressure shell 2 .

The phase change material 6, the rubber hose 7, the hydraulic oil 8, and the heat conducting sheet 11 are located in the inner pressure shell 2. The thermal conductive sheet 11 accelerates temperature conduction and accelerates the phase change process of the phase change material 6.

The hydraulic oil 8 is located inside the rubber hose 7 and is used to transmit pressure changes in the inner pressure shell 2.

The through-cabin connector 9 realizes the function of communicating the temperature difference energy heat exchanger with other parts of the submersible.

The heat exchange device for thermal ocean thermoelectric power generation of the present application converts the thermal energy into mechanical energy to promote the transmission of liquid and realize thermoelectric power generation by absorbing the temperature difference at different depths of the ocean when there is a sufficient temperature difference.

The working principle of the heat exchange device for generating electricity by ocean temperature difference energy of the present application is explained in detail through specific embodiments.

When the submersible is near the water surface, the phase change material 6 in the temperature difference heat exchanger is in a liquid state. As shown in Fig. 2, the hydraulic oil 8 in the rubber hose 7 is squeezed out of the temperature difference heat exchanger. As the submersible dives, the seawater temperature gradually decreases. When the seawater temperature is lower than the solidification temperature of the phase change material 6, the phase change material 6 begins to solidify. As the phase change material 6 solidifies, the pressure in the inner pressure shell 2 decreases, and the hydraulic oil 8 flows back into the rubber hose 7, as shown in FIG. 3. During the floating process of the submersible, the seawater temperature gradually rises. When the seawater temperature is higher than the melting temperature of the phase change material 6, the phase change material 6 starts to melt. The pressure in the inner pressure shell 2 increases, and the hydraulic oil 8 in the rubber hose 7 is squeezed out of the temperature difference heat exchanger, completing a working cycle of converting the temperature difference energy into mechanical energy. Among them, the heat carrier oil 10 located between the inner pressure shell 2 and the outer pressure shell 1 accelerates the heat transfer between the inner and outer pressure shells. The thermal conductive sheet 11 located in the inner pressure shell 2 accelerates the conduction of heat between the inner pressure shell 2 and the phase change material 6. The use of heat carrier oil 10 and thermal conductive sheet 11 accelerates the temperature difference energy capture process.

The outside of the thermoelectric power sheet 5 contacts the first heat-conducting plate 3, and the first heat-conducting plate 3 contacts the outer pressure shell 1. During the descending process of the submersible, the seawater temperature gradually decreases, causing the temperature of the outside of the thermoelectric power sheet 5 to gradually decrease. The inside of the thermoelectric power sheet 5 contacts the second heat conducting plate 4, the second heat conducting plate 4 contacts the inner pressure shell 2, the inner pressure shell 2 is filled with phase change material 6, and the side surface between the inner pressure shell 2 and the outer pressure shell 1 The right half of the space is blocked by the thermoelectric generating sheet 5, so the temperature conduction is slow. The left half of the side space between the inner pressure shell 2 and the outer pressure shell 1 is filled with heat carrier oil 10. The inner left side of the inner pressure shell 2 has a thermal conductive sheet 11, and the temperature drops faster than the right half, and the left half The phase change material 6 solidifies first, and the thermal conductivity of the phase change material 6 decreases after solidification. The temperature difference between the inner and outer sides of the thermoelectric power sheet 5 exists for a longer time than during the rising process, and has a longer power generation time, thereby obtaining more electric energy.

According to the heat exchange device for ocean thermoelectric power generation proposed in the embodiments of the present application, the high-efficiency capture of thermoelectric energy is realized, the thermoelectric power generation sheet is used for power generation, and the thermoelectric energy is converted into electric energy. The heat conduction sheet is used in the internal pressure chamber to accelerate the phase The process of changing the material and the phase change can quickly complete the capture of temperature difference energy. The use of this temperature difference energy heat exchanger can better improve the endurance of underwater unmanned submersibles such as underwater gliders and profile buoys.

In the description of this application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship indicated by "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply the pointed device or element It must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the application.

In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "a plurality of" means at least two, such as two, three, etc., unless specifically defined otherwise.

In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , Or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, it can be the internal communication of two components or the interaction relationship between two components, unless otherwise specified The limit. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

In this application, unless expressly stipulated and defined otherwise, the “on” or “under” of the first feature on the second feature may be in direct contact with the first and second features, or indirectly through an intermediary. contact. Moreover, the "above", "above" and "above" of the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the level of the first feature is higher than the second feature. The “below”, “below” and “below” of the second feature of the first feature may mean that the first feature is directly below or obliquely below the second feature, or it simply means that the level of the first feature is smaller than the second feature.

In the description of this specification, descriptions with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean specific features described in conjunction with the embodiment or example , The structure, materials, or characteristics are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples and the characteristics of the different embodiments or examples described in this specification without contradicting each other.

Although the embodiments of the present application have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and should not be construed as limiting the present application. A person of ordinary skill in the art can comment on the foregoing within the scope of the present application. The embodiment undergoes changes, modifications, substitutions and modifications.

Claims

A heat exchange device for ocean thermoelectric power generation, which is characterized by comprising: an outer pressure-resistant shell, an inner pressure-resistant shell, a first heat conduction plate, a second heat conduction plate, a thermoelectric power sheet, phase change material, rubber hose, hydraulic Oil, through-cabin connector, heat carrier oil and heat conducting sheet;

The thermoelectric power generation sheet is arranged on the side between the outer pressure shell and the inner pressure shell, occupying half of the side space between the outer pressure shell and the inner pressure shell The first heat conduction plate is arranged between the thermoelectric power generation sheet and the outer pressure shell, and the second heat conduction plate is arranged between the thermoelectric power generation sheet and the inner pressure shell;

The outer side of the thermoelectric power sheet is connected to the first heat conducting plate, the first heat conducting plate is connected to the outer pressure shell, the inner side of the thermoelectric power sheet is connected to the second heat conducting plate, and the second heat conducting plate Connecting the inner pressure shell;

The heat carrier oil is arranged on the other side between the outer pressure shell and the inner pressure shell, and occupies half of the side space between the outer pressure shell and the inner pressure shell ；

The phase change material, the rubber hose and the heat conducting sheet are arranged inside the inner pressure-resistant shell, the heat conducting sheet is connected to the inner pressure-proof shell, and the hydraulic oil is arranged on the rubber hose internal;

The through-cabin connector is arranged on the top of the heat exchange device.
The device according to claim 1, wherein:

The outer pressure shell and the inner pressure shell are cylindrical.
The device according to claim 1, wherein:

The thermal conductive sheet is used to accelerate the phase change process of the phase change material.
The device according to claim 1, wherein:

When the temperature of the marine environment where the heat exchange device is located is greater than the solidification temperature of the phase change material, the phase change material is in a liquid state, the pressure in the inner pressure shell increases, and the pressure in the rubber hose The hydraulic oil is squeezed out of the rubber hose;

When the temperature of the marine environment where the heat exchange device is located is lower than the solidification temperature of the phase change material, the phase change material solidifies, the pressure in the inner pressure-resistant shell decreases, and the hydraulic oil flows back to the soft rubber tube.
The device according to claim 1, wherein:

The heat carrier oil is used to accelerate the conduction of heat between the outer pressure shell and the inner pressure shell.
The device according to claim 1, wherein:

The thermally conductive sheet is used to accelerate the conduction of heat between the inner pressure-resistant shell and the phase change material.
The device according to claim 1, wherein:

The through-cabin connector is used for communicating the heat exchange device with other devices.