CN112145384B - Single-working-medium ocean temperature difference energy collecting and generating device and method - Google Patents
Single-working-medium ocean temperature difference energy collecting and generating device and method Download PDFInfo
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- CN112145384B CN112145384B CN201910578460.5A CN201910578460A CN112145384B CN 112145384 B CN112145384 B CN 112145384B CN 201910578460 A CN201910578460 A CN 201910578460A CN 112145384 B CN112145384 B CN 112145384B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G7/04—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using pressure differences or thermal differences occurring in nature
- F03G7/05—Ocean thermal energy conversion, i.e. OTEC
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient
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Abstract
The embodiment of the invention discloses a single-working-medium ocean thermal energy collection power generation device which comprises a pressure-resistant cover, wherein a phase change cylinder, an energy storage cylinder and an expander are sequentially arranged in the pressure-resistant cover, the phase change cylinder is connected with the energy storage cylinder through an energy storage expansion one-way channel of the expander, the energy storage cylinder is connected with the phase change cylinder through an energy release expansion one-way channel of the expander, circulating working media are filled in the energy storage expansion one-way channel and the energy release expansion one-way channel to form a closed circulating loop, and the expander is connected with a power generator; the invention collects ocean temperature difference energy by adopting a single gas-liquid phase change circulating working medium and utilizes the same to generate electricity, thereby obviously reducing the highest pressure of the system, prolonging the electricity generation time, optimizing the electricity generation control process and avoiding the mutual permeation and mixing of the working media.
Description
Technical Field
The embodiment of the invention relates to the technical field of ocean temperature difference energy utilization devices, in particular to a single-working-medium ocean temperature difference energy collection power generation device and method.
Background
The temperature difference energy is the energy with the largest reserve in ocean energy, has the advantages of being renewable, clean, stable and the like, and gradually draws more and more attention. For example, the temperature difference between the surface water temperature of the south sea and the deep water with the depth of less than 800 meters in China is maintained between 20 ℃ and 24 ℃, and the temperature difference energy utilization condition is excellent. Ocean thermal energy power generation is one of the main ways of utilizing thermal energy, and can effectively meet the power supply requirements of ocean monitoring instruments, ocean platform equipment, remote island residences and the like.
Ocean temperature difference energy power supply and storage battery power supply are two power supply modes of an underwater operation device, and compared with storage battery power supply, ocean temperature difference energy power supply is lower in cost and longer in time. The existing ocean temperature difference energy collecting and generating device is filled with a liquid-solid phase change working medium which is sensitive to temperature change, the change of the temperature of the seawater is sensed through the difference of the depth of the device submerged into the seawater, so that the phase change working medium is subjected to periodic phase change, the periodic change of the volume and the pressure of the working medium is accompanied, a device system is promoted to continuously store and release energy, the energy release process is coupled with a working medium expansion generating system, and the conversion of the heat energy to the electric energy is realized. In the prior art, as an ocean detection platform temperature difference energy power supply system, an integrated series-connection type liquid metal magnetohydrodynamic generator is adopted, when energy storage of a high-voltage energy accumulator is completed, an electromagnetic valve is opened, and under the action of pressure difference, a transmission medium extrudes and drives metal fluid in a corrugated pipe to pass through a power generation channel and cut a magnetic induction line, so that electric energy is generated, and the ocean detection platform temperature difference energy power supply system has the advantages of low noise, low cost and the like. As another ocean section motion equipment and ocean temperature difference energy power generation facility thereof, the device adopts four phase change cavity barrels filled with n-hexadecane, and by additionally arranging an equal-ratio pressure reducer, high pressure in an energy accumulator is sequentially converted into low pressure in an equal ratio, so that an efficient energy-releasing power generation process is realized.
Although the application of ocean temperature difference energy is realized in the prior art, the problems of high energy storage pressure, short power generation time, difficult control of the power generation process and the like are difficult to overcome because the solid-liquid phase change working medium with smaller compressibility and smaller volume change rate is adopted. Meanwhile, in the prior art, in order to maintain the normal operation of the system, three kinds of working media such as a power generation working medium, a transmission working medium and an energy storage working medium are filled in the system, and under the action of large pressure difference between the two sides of the piston and the valve, the working media are easy to mutually permeate and mix, so that the functional failure of the power generation device is gradually caused, and the service life of the matching instrument is greatly shortened.
Disclosure of Invention
Therefore, the embodiment of the invention provides a single-working-medium ocean thermal energy collecting and generating device and method, which achieve the purposes of high generating efficiency, stable operation and long service life, and solve the problems of small working medium volume change rate, short generating time, difficult control of the generating process, high operation pressure, permeation and mixing among multiple working mediums, short service life and the like in the conventional ocean thermal energy collecting and generating device and method.
In order to achieve the above object, an embodiment of the present invention provides the following:
the utility model provides a single-working-medium ocean temperature difference energy collection power generation device, includes the anti-pressure cover, install a phase transition section of thick bamboo, an energy storage section of thick bamboo and expander in order in the anti-pressure cover, a phase transition section of thick bamboo is connected with an energy storage section of thick bamboo through the energy storage expansion one-way passageway of expander, an energy storage section of thick bamboo is connected with a phase transition section of thick bamboo through the energy release expansion one-way passageway of expander, just fill in energy storage expansion one-way passageway and the energy release expansion one-way passageway and have filled circulation working medium and form closed circulation circuit, the expander is connected with the generator.
In a preferred embodiment of the present invention, the surface of the energy storage cylinder is wrapped with an insulating layer.
As a preferable scheme of the present invention, the energy storage expansion one-way passage comprises: the outlet end of the phase change cylinder is connected with the high-pressure input end of the expansion machine through an energy storage two-position two-way electromagnetic valve, and the low-pressure outlet end of the expansion machine is connected with the inlet end of the energy storage cylinder through an energy storage one-way valve.
As a preferable aspect of the present invention, the energy-releasing expansion one-way passage includes: the outlet end of the energy storage cylinder is connected with the high-pressure input end of the expansion machine through an energy release two-position two-way electromagnetic valve, and the low-pressure outlet end of the expansion machine is connected with the inlet end of the phase change cylinder through an energy release one-way valve.
As a preferred scheme of the invention, the circulating working medium is a single gas-liquid two-phase change working medium, and the phase change temperature range of the gas-liquid two-phase change working medium is 5-30 ℃.
In addition, the invention also provides a single-working-medium ocean thermal energy collection power generation method, which comprises a plurality of power generation cycles, wherein the single power generation cycle comprises the following steps:
step 100, floating the device on the sea surface in an initial state, enabling a phase change cylinder to absorb heat in seawater to heat an internal circulating working medium, driving an expansion machine to operate through an energy storage expansion one-way channel by the circulating working medium under pressure difference, and enabling the expanded low-pressure circulating working medium to enter an energy storage cylinder for energy storage until the energy storage cylinder and the phase change cylinder reach pressure balance;
200, submerging the device into a low-temperature area below the sea surface, and entering the next step after submerging the device into the low-temperature area until the circulating working medium in the phase change cylinder is liquefied when meeting cold, cooled and depressurized to a set value;
300, suspending the device in a low-temperature area in a suspension state, driving an expansion machine to operate by a high-temperature high-pressure circulating medium in an energy storage cylinder through an energy release expansion one-way channel under the pressure difference, feeding the energy-released circulating working medium into a phase change cylinder, and releasing energy by the expansion machine through the high-temperature high-pressure circulating working medium in the energy storage cylinder when the temperature and the pressure of the circulating working medium in the phase change cylinder are reduced to a set value until the temperature and the pressure in the energy storage cylinder and the pressure in the phase change cylinder are the same;
step 400, the device is raised to the surface.
As a preferred scheme of the invention, when the device is positioned at sea level, the circulating working medium in the phase change cylinder takes liquid state as main part, and the phase change cylinder continuously absorbs the heat of the sea water to convert the liquid circulating working medium into the circulating working medium taking gas state as main part or all gas state, so as to improve the temperature and the pressure of the circulating working medium to set values.
The embodiment of the invention has the following advantages:
the invention adopts single gas-liquid phase change circulating working medium to collect ocean temperature difference energy and utilizes the same to generate electricity, and the gas working medium has the characteristics of better compressibility, large phase change volume change rate and the like, so that the highest pressure of the system can be obviously reduced, the electricity generation time can be prolonged, the electricity generation control process can be optimized, and the single working medium is adopted, thereby avoiding the mutual permeation and mixing of the working media, and obviously prolonging the service life of the device and matched instruments.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
FIG. 1 is a block diagram of the overall structure in an embodiment of the present invention;
FIG. 2 is a schematic flow chart of an embodiment of the present invention;
in the figure:
1-a phase change cartridge; 2-an energy storage cylinder; 3-an expander; 4-a generator; 501-energy storage two-position two-way electromagnetic valve; 502-release of energy of a two-position two-way solenoid valve; 601-energy storage check valve; 602-a power release check valve; 7-pressure resistant cover.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the invention provides a single-working-medium ocean thermal energy collection power generation device, which comprises a pressure resistant cover 7, wherein a phase change cylinder 1, an energy storage cylinder 2 and an expander 3 are sequentially installed in the pressure resistant cover 7, the phase change cylinder 1 is connected with the energy storage cylinder 2 through an energy storage expansion one-way channel of the expander 3, the energy storage cylinder 2 is connected with the phase change cylinder 1 through an energy release expansion one-way channel of the expander 3, circulating working media are filled in the energy storage expansion one-way channel and the energy release expansion one-way channel to form a closed circulation loop, and the expander 3 is connected with a power generator 4. The power generation device in the embodiment can rise and descend in the seawater along with other instruments to realize direct heat exchange with the seawater.
In the above, the phase change cylinder is filled with the circulating working medium, the phase change cylinder 1 is always exposed in seawater and used for absorbing heat in seawater or cooling the circulating working medium, and the outlet guide pipe of the phase change cylinder is inserted into the phase change cylinder 1 to ensure that the liquid working medium in the phase change cylinder cannot flow out. The circulating working medium mainly takes liquid as a main part in the phase change cylinder 1, the phase state of the circulating working medium can also change at different moments of a power generation period, the energy storage cylinder 2 mainly takes gas state, and the gas state circulating working medium presents low pressure or high pressure in the circulating process. In order to keep the environment in the energy storage cylinder 2 from being influenced by the outside, the surface of the energy storage cylinder 2 is wrapped with an insulating layer.
In this embodiment, the energy-storing expansion one-way passage includes: the outlet end of the phase change cylinder 1 is connected with the high-pressure input end of the expansion machine 3 through an energy storage two-position two-way electromagnetic valve 501, and the low-pressure outlet end of the expansion machine 3 is connected with the inlet end of the energy storage cylinder 2 through an energy storage one-way valve 601.
The flow direction of the energy release check valve 601 is that the low-pressure end of the expansion machine 3 flows to the energy storage cylinder 2.
The energy-releasing expansion one-way channel comprises: the outlet end of the energy storage cylinder 2 is connected with the high-pressure input end of the expansion machine 3 through an energy release two-position two-way electromagnetic valve 502, and the low-pressure outlet end of the expansion machine 3 is connected with the inlet end of the phase change cylinder 1 through an energy release one-way valve 602.
Wherein, the flow direction of the energy release check valve 602 is that the low-pressure end of the expansion machine 3 flows to the phase change cylinder 1.
In addition, in the invention, the initial start of the state is supplied by a built-in storage battery to realize the start of the device, the electric energy generated by the system after the start preferentially meets the consumption of the operation of the device, when the generated energy is larger than the consumption of the device, the redundant electric quantity is output, and when the generated energy is less than the consumption of the device, the insufficient part is compensated by the storage battery.
In the prior art, three working media such as a power generation working medium, a transmission working medium and an energy storage working medium are mostly filled, multiple working media coexist in the same system, and mutual permeation and mixing are easy to occur under the action of atmospheric pressure difference between two sides of a piston and a valve, so that in order to overcome the problem, the circulating working medium in the embodiment is a single gas-liquid two-phase change working medium which is of the same type and presents different phase states in the range of controllable temperature and pressure, and the phase change temperature range of the gas-liquid two-phase change working medium is 5-30 ℃, so that phase change can be realized in the temperature range of sea surface seawater and the temperature range after seawater submerging.
In addition, as shown in fig. 2, the invention provides a single-working medium ocean thermal energy collection power generation method, which comprises a plurality of power generation cycles, wherein the single power generation cycle comprises the following steps:
step 100, the device floats on the sea surface in an initial state, the phase change cylinder absorbs heat in seawater to heat internal circulating working media, the circulating working media drive the expansion machine to operate through the energy storage expansion one-way channel under the positive pressure difference, and the expanded low-pressure circulating working media enter the energy storage cylinder for energy storage until the energy storage cylinder and the phase change cylinder reach pressure balance.
And 200, submerging the device into a low-temperature area below the sea surface.
In step 200, the device submerges to a low-temperature area until the circulating working medium in the phase change cylinder is cooled and depressurized to a set value in a cooling liquefaction mode, and then the next step is carried out.
And 300, suspending the device in a low-temperature region in a suspension state, when the temperature and the pressure of the circulating working medium in the phase change cylinder are reduced to a set value, driving an expansion machine to operate by the high-temperature and high-pressure circulating medium in the energy storage cylinder through an energy release expansion one-way channel under the pressure difference until the temperature and the pressure in the energy storage cylinder and the phase change cylinder are the same, and feeding the energy released circulating working medium into the phase change cylinder.
And step 400, the device rises to the sea surface, when the device is positioned on the sea surface, the circulating working medium in the phase change cylinder is mainly in a liquid state, and the phase change cylinder continuously absorbs the heat of the sea water to convert the liquid circulating working medium into the circulating working medium mainly in a gaseous state or both the liquid circulating working medium and the gaseous circulating working medium, so that the temperature and the pressure of the circulating working medium are increased to set values.
In the present embodiment, four states are included in the following one cycle, and for better illustration of this problem, the following will be described in detail with reference to four steps and the whole apparatus:
a floating state: the device is suspended on the surface of seawater, and the two-position two-way electromagnetic valve and the one-way valve are both in a non-conducting state. The circulating working medium in the phase change cylinder 1 absorbs heat in seawater, so that the temperature and the pressure of the circulating working medium in the phase change cylinder 1 are increased, when the set pressure is reached, the energy storage two-position two-way electromagnetic valve 501 is opened, and under the action of pressure difference, the circulating working medium in the phase change cylinder 1 enters the expander 3 through the energy storage two-position two-way electromagnetic valve 501, and drives the expander 3 to drive the generator 4 to generate electricity. The expanded low-pressure circulating working medium enters the communicated energy storage one-way valve 601 and enters the energy storage cylinder 2, so that energy is stored in the energy storage cylinder 2. When the circulating working medium in the energy storage cylinder 2 and the working medium in the phase change cylinder 1 reach saturation, namely maximum pressure, the energy storage of the energy storage cylinder 2 is finished, and meanwhile, the power generation process on the sea surface is finished. At the moment, the working medium in the phase change cylinder 1 is mainly gaseous or is gaseous, and the working medium in the energy storage cylinder 2 is in a high-pressure gaseous state.
A submergence state: the two-position two-way electromagnetic valve and the one-way valve are both in a non-conducting state. In the submergence process, particularly submergence to the low-temperature region of seawater, the temperature of the seawater is gradually reduced, the circulating working medium in the phase change cylinder 1 senses the temperature change of the seawater, liquefaction is gradually carried out, and the temperature and the pressure are both reduced. Because the energy storage cylinder 2 has the capability of heat preservation, the state parameters of the working medium in the energy storage cylinder are not changed.
Suspension state: when the device submerges to a specified position under the sea, the energy release two-position two-way solenoid valve 502 is switched to a conducting state. Because the temperature and the pressure of the circulating working medium in the energy storage cylinder 2 are higher, the circulating working medium in the energy storage cylinder 2 enters the expansion machine 3 under the action of the pressure difference, and the expansion machine 3 is driven to drive the generator 4 to generate power. The expanded low-pressure circulating working medium enters the phase change cylinder 1 through the conducted energy release one-way valve 602, and the energy storage cylinder 2 releases energy, so that the temperature and the pressure of the circulating working medium in the energy storage cylinder 2 are both reduced. When the temperature and the pressure of the circulating working medium in the energy storage cylinder 2 are the same as those of the circulating working medium in the phase change cylinder 1, the energy storage cylinder 2 releases energy, and the submarine power generation process is completed. At the moment, the working medium in the phase change cylinder 1 is mainly in a liquid state, and the working medium in the energy storage cylinder 2 is in a low-pressure gas state.
A rising state: when the device ascends, the two-position two-way electromagnetic valve and the one-way valve are both in a non-conducting state. In the rising process, the temperature of the seawater gradually rises, the circulating working medium in the phase change cylinder 1 senses the temperature change of the seawater, vaporization occurs, and the temperature and the pressure of the seawater are both raised. Because the energy storage cylinder 2 has a heat insulation structure, the state parameters of the working medium in the energy storage cylinder are not changed. When the wave rises to the sea surface, a submerged and rising power generation cycle is completed.
In summary, the invention adopts single gas-liquid phase change cycle working medium to collect ocean temperature difference energy and uses the same to generate electricity, because the gaseous working medium has the characteristics of better compressibility, large change rate of phase change volume and the like, the highest pressure of the system can be obviously reduced, the electricity generation time can be prolonged, and the electricity generation control process can be optimized.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, it is intended that all such modifications and alterations be included within the scope of this invention as defined in the appended claims.
Claims (7)
1. A single-working-medium ocean temperature difference energy collecting and generating device comprises a pressure-resistant cover (7), wherein a phase change cylinder (1), an expander (3) and an energy storage cylinder (2) are sequentially connected in the pressure-resistant cover (7), and is characterized in that the phase change cylinder (1) is connected with the energy storage cylinder (2) through an energy storage expansion one-way channel of the expander (3), the energy storage cylinder (2) is connected with the phase change cylinder (1) through an energy release expansion one-way channel of the expander (3), circulating working media are filled in the energy storage expansion one-way channel and the energy release expansion one-way channel to form a closed circulating loop, and the expander (3) is connected with a generator (4);
a circulating working medium is filled in the phase change cylinder, the phase change cylinder (1) is used for absorbing heat in surface seawater to heat the circulating working medium, the circulating working medium drives the expander (3) to operate through the energy storage expansion one-way channel under pressure difference, and the expanded low-pressure circulating working medium enters the energy storage cylinder (2) for energy storage until the pressure of the energy storage cylinder (2) and the pressure of the phase change cylinder (1) are balanced to finish the sea surface power generation process;
the temperature difference energy collecting and generating device submerges into a low-temperature area below the sea surface until a circulating working medium in the phase change cylinder is cooled and depressurized to a set value when meeting cold liquefaction, the temperature difference energy collecting and generating device suspends in the low-temperature area, a high-temperature high-pressure circulating medium in the energy storage cylinder (2) drives the expander (3) to operate through the energy release expansion one-way channel under the pressure difference, the energy released circulating working medium enters the phase change cylinder (1), when the circulating working medium in the phase change cylinder (1) is cooled and depressurized to the set value, the high-temperature high-pressure circulating working medium in the energy storage cylinder (2) releases energy through the expander (3) until the temperature and the pressure in the energy storage cylinder (2) and the phase change cylinder (1) are the same, and therefore the submarine power generation process is completed.
2. The simplex matter ocean thermal energy collection power plant of claim 1, wherein the surface of the energy storage cylinder (2) is wrapped with a thermal insulation layer.
3. The monopropellant ocean thermal energy harvesting power plant of claim 1, wherein the energy storage expansion one-way path comprises: the outlet end of the phase change cylinder (1) is connected with the high-pressure input end of an expander (3) through an energy storage two-position two-way electromagnetic valve (501), and the low-pressure outlet end of the expander (3) is connected with the inlet end of the energy storage cylinder (2) through an energy storage one-way valve (601).
4. The monopropellant marine thermal energy harvesting power plant of claim 1, wherein the energy releasing expansion one-way passageway comprises: the outlet end of the energy storage cylinder (2) is connected with the high-pressure input end of an expander (3) through an energy release two-position two-way electromagnetic valve (502), and the low-pressure outlet end of the expander (3) is connected with the inlet end of the phase change cylinder (1) through an energy release one-way valve (602).
5. The single-working-medium ocean thermal energy collection and power generation device of claim 1, wherein the circulating working medium is a single gas-liquid two-phase change working medium, and the phase change temperature range of the gas-liquid two-phase change working medium is 5-30 ℃.
6. A single-working-medium ocean thermal energy collection and power generation method based on the single-working-medium ocean thermal energy collection and power generation device of any one of claims 1 to 5 is characterized by comprising a plurality of power generation periods, wherein a single power generation period comprises the following steps:
step 100, floating the device on the sea surface in an initial state, enabling a phase change cylinder to absorb heat in seawater to heat internal circulating working media, driving an expansion machine to operate by the circulating working media through an energy storage expansion one-way channel under pressure difference, and enabling expanded low-pressure circulating working media to enter an energy storage cylinder for energy storage until the energy storage cylinder and the phase change cylinder reach pressure balance;
200, submerging the device into a low-temperature area below the sea surface, and entering the next step after submerging the device into the low-temperature area until the circulating working medium in the phase change cylinder is liquefied when meeting cold, cooled and depressurized to a set value;
300, suspending the device in a low-temperature area in a suspension state, driving an expansion machine to operate by a high-temperature high-pressure circulating medium in an energy storage cylinder through an energy release expansion one-way channel under the pressure difference, feeding the energy-released circulating working medium into a phase change cylinder, and releasing energy by the expansion machine through the high-temperature high-pressure circulating working medium in the energy storage cylinder when the temperature and the pressure of the circulating working medium in the phase change cylinder are reduced to a set value until the temperature and the pressure in the energy storage cylinder and the pressure in the phase change cylinder are the same;
step 400, the device is raised to the surface.
7. The method for generating electricity by collecting temperature difference energy of single working medium ocean according to claim 6, wherein when the device is at sea level, the circulating working medium in the phase change cylinder is mainly in liquid state, and the phase change cylinder continuously absorbs heat of seawater to convert the liquid circulating working medium into mainly in gaseous state or all in gaseous state, and the temperature and pressure of the circulating working medium are raised to set values.
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| CN117622438B (en) * | 2023-12-15 | 2024-04-30 | 中国科学院上海高等研究院 | Autonomous underwater vehicle power supply system based on ocean temperature difference |
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| DE10247387A1 (en) * | 2001-10-15 | 2003-09-11 | Karl Ludwig Holder | Power station has turbine or piston engine, and pressure build-up devices with heat exchangers filled with carbon dioxide for converting thermal to electrical energy with generator |
| US20070186553A1 (en) * | 2006-02-15 | 2007-08-16 | Lin Hsing-Fa | Thermo-driven engine |
| CN104481828B (en) * | 2014-11-26 | 2018-04-10 | 中国船舶重工集团公司第七一〇研究所 | A kind of electric supply installation and method of marine monitoring equipment |
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