CN116404907A - Temperature difference energy supply device and underwater surveying system - Google Patents

Temperature difference energy supply device and underwater surveying system Download PDF

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Publication number
CN116404907A
CN116404907A CN202310242274.0A CN202310242274A CN116404907A CN 116404907 A CN116404907 A CN 116404907A CN 202310242274 A CN202310242274 A CN 202310242274A CN 116404907 A CN116404907 A CN 116404907A
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CN
China
Prior art keywords
module
phase
energy
heat exchange
change heat
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Pending
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CN202310242274.0A
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Chinese (zh)
Inventor
李醒飞
钱意祯
徐佳毅
刘烨昊
文艺成
马庆锋
李洪宇
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Tianjin University
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Tianjin University
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Priority to CN202310242274.0A priority Critical patent/CN116404907A/en
Publication of CN116404907A publication Critical patent/CN116404907A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/024—Installations or systems with accumulators used as a supplementary power source, e.g. to store energy in idle periods to balance pump load
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/006—Compensation or avoidance of ambient pressure variation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/14—Energy-recuperation means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B3/00—Intensifiers or fluid-pressure converters, e.g. pressure exchangers; Conveying pressure from one fluid system to another, without contact between the fluids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V9/00—Prospecting or detecting by methods not provided for in groups G01V1/00 - G01V8/00
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N11/00—Generators or motors not provided for elsewhere; Alleged perpetua mobilia obtained by electric or magnetic means
    • H02N11/002—Generators

Abstract

A thermoelectric energy powered device and a subsea survey system, the thermoelectric energy powered device comprising: a housing part forming an accommodation space filled with a pressurized gas; the phase change heat exchange module is internally provided with a phase change material, and the phase change material changes phase along with the change of external temperature, so that the pressure in the phase change heat exchange module is increased or reduced; the oil bag module is used for conveying hydraulic oil to the phase-change heat exchange module based on the pressure provided by the pressurized gas under the condition that the pressure in the phase-change heat exchange module is reduced; the energy storage module is used for receiving hydraulic oil from the phase-change heat exchange module under the condition that the pressure in the phase-change heat exchange module becomes large; and the energy supply module is used for allowing the hydraulic oil in the energy storage module to flow to the oil bag module under the condition that the actual pressure value of the energy storage module exceeds the preset pressure value, and simultaneously converting the overflow pressure of the actual pressure value exceeding the preset pressure value into power supply electric energy and storing the power supply electric energy into the battery.

Description

Temperature difference energy supply device and underwater surveying system
Technical Field
The invention relates to the technical field of underwater surveying, in particular to a temperature difference energy supply device suitable for underwater unmanned surveying and an underwater surveying system.
Background
The temperature difference energy supply device can utilize the characteristics of low melting point of the phase change material and large solid-liquid state volume change rate, can enable the phase change material to change state and change volume under different temperature states, generates pressure, and does work by discharging hydraulic oil. Because of the frequent profile movement, the underwater survey system has high compatibility with the utilization of temperature difference energy. However, the existing temperature difference energy supply device has the phenomena of complex structure, heavy quality, strong specialization, difficult maintenance, low efficiency and the like, and is not beneficial to the implementation of underwater surveying work.
Disclosure of Invention
To at least partially overcome at least one of the above-mentioned or other inventive technical drawbacks, at least one embodiment of the present invention provides a thermoelectric energy powered device and a subsea survey system. The temperature difference energy supply device can convert temperature difference energy into electric energy and store the electric energy based on the change of external temperature, pressurized gas is filled in the accommodating space, the efficiency of the oil bag module for conveying hydraulic oil to the phase change heat exchange module can be improved, and the power generation efficiency of the temperature difference energy supply device can be improved.
According to one aspect of the present invention, there is provided a thermoelectric energy supply apparatus comprising: a housing portion having an accommodation space formed therein, the accommodation space being filled with a pressurized gas; the phase-change heat exchange module is arranged outside the shell part, a phase-change material is arranged inside the phase-change heat exchange module, and the phase-change material changes phase along with the change of external temperature, so that the pressure in the phase-change heat exchange module is increased or decreased; an oil bag module disposed inside the housing part and configured to deliver hydraulic oil to the phase change heat exchange module based on a pressure provided by the pressurized gas in a case where the pressure inside the phase change heat exchange module is reduced; the energy storage module is communicated with the phase-change heat exchange module and is configured to receive hydraulic oil from the phase-change heat exchange module under the condition that the pressure in the phase-change heat exchange module becomes large; and the energy supply module is communicated with the energy storage module and is configured to allow hydraulic oil in the energy storage module to flow to the oil bag module under the condition that the actual pressure value of the energy storage module exceeds a preset pressure value, and convert the overflow pressure of the actual pressure value exceeding the preset pressure value into power supply electric energy and store the power supply electric energy into a battery.
According to an embodiment of the present invention, the temperature difference energy supply device further includes: and the sensor is arranged between the energy storage module and the phase change heat exchange module and is configured to detect the pressure of the energy storage module.
According to an embodiment of the present invention, the temperature difference energy supply device further includes: and a control valve, which is arranged between the energy storage module and the energy supply module, and is configured to allow hydraulic oil to flow from the energy storage module to the energy supply module when the sensor detects that the actual pressure value in the energy storage module exceeds the preset pressure value.
According to an embodiment of the invention, the energy supply module comprises: the first end of the hydraulic motor is communicated with the energy storage module, the second end of the hydraulic motor is communicated with the oil bag module, and when the sensor detects that the actual pressure value of the energy storage module exceeds a preset pressure value, the phase-change heat exchange module and/or the hydraulic oil of the energy storage module drive the hydraulic motor to rotate so as to allow the hydraulic oil to flow into the oil bag module from the hydraulic motor; and a transduction module for generating and storing electric energy under the driving of the hydraulic motor.
According to an embodiment of the present invention, the transduction module further includes: a generator connected to the third end of the hydraulic motor and configured to generate electric energy under the drive of the hydraulic motor; and the generator is connected with the hydraulic motor through the coupler.
According to an embodiment of the present invention, the transduction module further includes: a rectifying circuit, connected to the generator, configured to rectify the electric energy; the voltage stabilizing circuit is connected with the rectifying circuit and is configured to stabilize the rectified electric energy; and the protection circuit is connected with the voltage stabilizing circuit and is configured to output the power supply electric energy after detecting the electric energy after voltage stabilization.
According to an embodiment of the present invention, the temperature difference energy supply device further includes: the one-way valve is arranged between the oil bag module and the phase-change heat exchange module and is configured to allow hydraulic oil of the oil bag module to flow into the phase-change heat exchange module in one way.
According to an embodiment of the invention, the pressurized gas is nitrogen at 0.1 Mpa.
According to the embodiment of the invention, the initial pressure value of the energy storage module is 15MPa.
According to another aspect of the invention there is provided a subsea survey system comprising: a survey robot; and a temperature differential energy powered device as described above mounted on the survey robot.
According to the embodiment of the invention, the temperature difference energy supply device can convert the temperature difference energy into electric energy based on the change of the external temperature and store the electric energy. Specifically, the energy storage module can convert temperature difference energy based on the change of external temperature into pressure and store the pressure, and under the condition that the pressure value in the energy storage module exceeds a preset pressure value, the pressure is released to the energy supply module by the energy storage module in a hydraulic oil flowing mode, and the energy supply module can convert the pressure into electric energy and store the electric energy and simultaneously convey the hydraulic oil to the oil bag module. In detail, under the condition that the external temperature of the phase-change heat exchange module is reduced to the solid phase temperature, the phase-change material in the phase-change heat exchange module is solidified under the influence of temperature change, the pressure in the phase-change heat exchange module is reduced, the phase-change heat exchange module and the oil bag module generate pressure difference, and the oil bag module conveys hydraulic oil to the phase-change heat exchange module under the pressure effect of the pressure difference and the pressurized gas. Through filling the pressurized gas in accommodation space, can promote the efficiency that the oil bag module carried hydraulic oil to phase transition heat transfer module, and then can improve the generating efficiency of temperature difference energy supply device. By setting the voltage stabilizing circuit, the protection circuit and the battery as loads and adjusting the voltage stabilizing circuit, the protection circuit and the battery in real time, the power generation with the maximum efficiency point can be realized.
Drawings
FIG. 1 schematically illustrates an operational schematic of a thermoelectric energy powered device according to an embodiment of the present invention;
FIG. 2 schematically illustrates a cross-sectional view of a thermoelectric energy powered device according to an embodiment of the present invention;
FIG. 3 schematically illustrates a cross-sectional view of a thermoelectric energy powered device with a phase change heat exchange module removed, in accordance with an embodiment of the present invention;
FIG. 4 schematically illustrates a front view of a phase change heat exchange module of a thermoelectric energy powered device in accordance with an embodiment of the present invention;
FIG. 5 schematically illustrates a perspective view of a subsea survey system according to an embodiment of the invention; and
FIG. 6 schematically illustrates a three-dimensional plot of generator power generation efficiency as a function of pressure, load for a subsea survey system according to an embodiment of the invention; and
FIG. 7 schematically illustrates a cross-sectional view of a marine survey system according to an embodiment of the invention.
Reference numerals
1: a temperature difference energy supply device;
11: a housing portion;
12: an accommodation space;
13: a phase change heat exchange module;
131: a phase change cavity housing;
IB223248
132: an upper end cover of the phase change cavity;
133: a phase change cavity lower end cover;
134: a phase change cavity;
135: phase-change hydraulic oil bag sealing cover;
136: a phase change hydraulic oil bag;
14: an oil bag module;
15: an energy storage module;
16: an energy supply module;
161: a hydraulic motor;
162: a transduction module;
1621: a generator;
1622: a coupling;
1623: a rectifying circuit;
1624: a voltage stabilizing circuit;
1625: a protection circuit;
1626: a circuit control board;
17: a sensor;
18: a control valve;
181: a ball valve;
182: steering engine;
19: a one-way valve;
110: an electrical energy output;
111: a battery;
112: a first support plate;
113: a second support plate;
114: a third support plate;
115: a fourth support plate;
116: a fifth support plate;
117: a sixth support plate;
118: a seventh support plate;
2: a survey robot.
Detailed Description
The present invention will be further described in detail below with reference to specific embodiments and with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present invention more apparent. This invention may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the size of layers and regions, as well as the relative sizes, may be exaggerated for the same elements throughout.
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the invention. In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the invention. It may be evident, however, that one or more embodiments may be practiced without these specific details. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present invention.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The terms "comprises," "comprising," and/or the like, as used herein, specify the presence of stated features, steps, operations, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, or components.
All terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise defined. It should be noted that the terms used herein should be construed to have meanings consistent with the context of the present specification and should not be construed in an idealized or overly formal manner.
In order to facilitate the understanding of the technical solution of the present invention by those skilled in the art, the following technical terms will be explained.
Where expressions like at least one of "A, B and C, etc. are used, the expressions should generally be interpreted in accordance with the meaning as commonly understood by those skilled in the art (e.g.," a system having at least one of A, B and C "shall include, but not be limited to, a system having a alone, B alone, C alone, a and B together, a and C together, B and C together, and/or A, B, C together, etc.). Where a formulation similar to at least one of "A, B or C, etc." is used, in general such a formulation should be interpreted in accordance with the ordinary understanding of one skilled in the art (e.g. "a system with at least one of A, B or C" would include but not be limited to systems with a alone, B alone, C alone, a and B together, a and C together, B and C together, and/or A, B, C together, etc.).
Fig. 1 schematically shows an operation principle diagram of a thermoelectric energy power supply device according to an embodiment of the present invention. Fig. 2 schematically illustrates a cross-sectional view of a thermoelectric energy powered device according to an embodiment of the present invention. Fig. 3 schematically illustrates a cross-sectional view of a thermoelectric energy powered device according to an embodiment of the invention after removal of a phase change heat exchange module. Fig. 4 schematically illustrates a front view of a phase change heat exchange module of a thermoelectric energy powered device according to an embodiment of the present invention.
An embodiment of the present invention provides a temperature difference energy supply device, as shown in fig. 1 to 4, including: the device comprises a shell part 11, a phase-change heat exchange module 13, an oil bag module 14, an energy storage module 15 and an energy supply module 16.
Specifically, the housing portion 11 is formed with an accommodation space 12, and the accommodation space 12 is filled with a pressurized gas. The phase-change heat exchange module 13 is arranged outside the shell 11, and a phase-change material is arranged inside the phase-change heat exchange module 13 and changes phase along with the change of the external temperature, so that the pressure in the phase-change heat exchange module 13 is increased or decreased. The oil bag module 14 is provided inside the housing part 11 and is configured to deliver hydraulic oil to the phase change heat exchange module 13 based on the pressure provided by the pressurized gas in the case where the pressure inside the phase change heat exchange module 13 is reduced. The energy storage module 15 is in communication with the phase change heat exchange module 13 and is configured to receive hydraulic oil from the phase change heat exchange module 13 in case that the pressure in the phase change heat exchange module 13 becomes large. The energy supply module 16 is in communication with the energy storage module 15 and is configured to allow hydraulic oil in the energy storage module 15 to flow to the oil bag module 14 while converting an overflow pressure of the actual pressure value exceeding the preset pressure value into supply electric energy and storing the supply electric energy in the battery, in case that the actual pressure value of the energy storage module 15 exceeds the preset pressure value.
In detail, as shown in fig. 4, the phase-change heat exchange module 13 may be composed of a phase-change cavity housing 131, a phase-change cavity upper end cover 132, a phase-change cavity lower end cover 133, a phase-change cavity 134, a phase-change hydraulic oil bag sealing cover 135, a phase-change hydraulic oil bag 136, a phase-change material filled in the phase-change cavity 134, and hydraulic oil filled in the phase-change hydraulic oil bag 136. The phase change hydraulic oil bladder 136 may be made of nitrile rubber. The phase change material can adopt n-hexadecane with the phase change temperature varying from 16 ℃ to 18 ℃. The phase-change cavity shell 131 can be fixed through the phase-change cavity upper end cover 132 and the phase-change cavity lower end cover 133, the phase-change hydraulic oil bag 136 can be sealed through the phase-change cavity upper end cover 132 and the phase-change hydraulic oil bag sealing cover 135, the phase-change cavity 134 can be filled with phase-change materials, and the phase-change hydraulic oil bag 136 can be filled with hydraulic oil. After the external environment of the phase-change heat exchange module 13 is cooled, the solidification volume of the phase-change material in the phase-change cavity is reduced, the volume of the phase-change hydraulic oil bag 136 is increased, a pressure difference exists between the phase-change hydraulic oil bag 136 and the oil bag module 14, and hydraulic oil flows from the oil bag module 14 to the phase-change hydraulic oil bag 136 based on the pressure difference.
As shown in fig. 2 to 4, the housing 11 may be fixedly connected to the outer shell of the housing 11 through the upper end cap 132 of the phase-change cavity, and may be subjected to a leak-proof sealing treatment. The pressurized gas in the housing 11 can be regarded as a constant pressure, and by providing the pressurized gas, the flow efficiency of the hydraulic oil from the oil bag module 14 into the phase change heat exchange module 13 can be improved.
As shown in fig. 1 and 3, the housing 11 may be connected to the outer shell of the housing 11 by providing a first support plate 112, a second support plate 113, a third support plate 114, a fourth support plate 115, a fifth support plate 116, a sixth support plate 117, and a seventh support plate 118 in cooperation with stud nuts, so as to fix the energy storage module 15, the oil bag module 14, and the energy supply module 16 in the accommodating space 12. As shown in fig. 3, the energy storage module 15 may be fixed between the first support plate 112 and the second support plate 113 by connecting the first support plate 112, the second support plate 113, the stud nut, and the outer shell of the housing portion 11. The oil bladder module 14 may be fixed between the fourth support plate 115 and the fifth support plate 116 by screws and nuts. The temperature difference energy supply device has no external oil way, and the phase change cavity housing 131 and the housing part 11 housing can be made of aluminum alloy materials, so that the weight is reduced, the formation of a primary battery in seawater can be prevented, and the corrosion is prevented from affecting the working condition.
According to the embodiment of the invention, the temperature difference energy supply device can convert the temperature difference energy into electric energy based on the change of the external temperature and store the electric energy. Specifically, the energy storage module 15 may convert the temperature difference energy based on the change of the external temperature into pressure and store the pressure, and in case that the pressure value in the energy storage module 15 exceeds the preset pressure value, the pressure is released from the energy storage module 15 to the energy supply module 16 in the form of a flow of hydraulic oil, and the energy supply module 16 may convert the pressure into electric energy and store the electric energy while delivering the hydraulic oil into the oil bag module 14. In detail, in the case that the external temperature of the phase change heat exchange module 13 is reduced to the solid phase temperature, the phase change material in the phase change heat exchange module 13 is solidified under the influence of the temperature change, the pressure in the phase change heat exchange module 13 is reduced, the phase change heat exchange module 13 and the oil bag module 14 generate a pressure difference, and the oil bag module 14 transmits hydraulic oil to the phase change heat exchange module 13 under the pressure difference and the pressure of the pressurized gas. By filling the pressurized gas in the accommodating space 12, the efficiency of the oil bag module 14 for conveying the hydraulic oil to the phase change heat exchange module 13 can be improved, and the power generation efficiency of the temperature difference energy supply device 1 can be improved.
In some embodiments, the thermoelectric energy powered device 1 further comprises a sensor 17. Specifically, the sensor 17 is disposed between the energy storage module 15 and the phase change heat exchange module 13, and is configured to detect the pressure of the energy storage module 15.
In some embodiments, the thermoelectric energy powered device 1 further comprises a control valve 18. Specifically, a control valve 18 is provided between the energy storage module 15 and the energy supply module 16, configured to allow hydraulic oil to flow from the energy storage module 15 to the energy supply module 16 in the event that the sensor 17 detects that the actual pressure value within the energy storage module 15 exceeds a preset pressure value. The control valve 18 may be composed of a ball valve 181 and a steering engine 182.
As shown in fig. 1, in some embodiments, the energy supply module 16 includes a hydraulic motor 161 and a transduction module 162. Specifically, the first end of the hydraulic motor 161 is communicated with the energy storage module 15, the second end of the hydraulic motor 161 is communicated with the oil bag module 14, and in the case that the sensor 17 detects that the actual pressure value of the energy storage module 15 exceeds the preset pressure value, the hydraulic oil of the phase-change heat exchange module 13 and/or the energy storage module 15 drives the hydraulic motor 161 to rotate so as to allow the hydraulic oil to flow from the hydraulic motor 161 into the oil bag module 14. The transduction module 162 generates and stores electric energy under the driving of the hydraulic motor 161.
As shown in fig. 1 and 2, in some embodiments, the transduction module 162 further includes: a generator 1621 and a coupling 1622. Specifically, the generator 1621 is connected to a third end of the hydraulic motor 161, and the generator 1621 is configured to generate electric energy, for example, to output three-phase alternating current, under the drive of the hydraulic motor 161. The generator 1621 is connected to the hydraulic motor 161 via a coupling 1622. The hydraulic motor 161, the coupling 1622, and the generator 1621 may be fixedly installed on the third support plate 114 by screws and nuts and located between the third support plate 114 and the second support plate 113. The generator 1621 may be a 200W generator with a 8000r rotation speed to increase the power generation efficiency while reducing the load, and no gear reducer is needed to match the torque.
Further, the third end of the hydraulic motor 161 may be an output shaft of the hydraulic motor 161, the output shaft of the hydraulic motor 161 may be fixedly connected with an input shaft of the generator 1621 through a coupling 1622, the hydraulic motor 161 converts the pressure of the hydraulic oil to mechanical energy, and the mechanical energy is transferred to the generator 1621, and the generator 1621 converts the mechanical energy to electrical energy. The first end of the hydraulic motor 161 may be an oil inlet of the hydraulic motor 161, the second end of the hydraulic motor 161 may be an oil outlet of the hydraulic motor 161, hydraulic oil flows into the hydraulic motor 161 through the oil inlet of the hydraulic motor 161, and flows out of the hydraulic motor 161 from the oil outlet of the hydraulic motor 161 to the oil bag module 14.
As shown in fig. 1, in some embodiments, the transduction module 162 further includes: a rectifying circuit 1623, a voltage stabilizing circuit 1624, and a protection circuit 1625.
Specifically, a rectifying circuit 1623 is connected to the generator 1621 and is configured to rectify the electrical energy. The voltage stabilizing circuit 1624 is connected to the rectifying circuit 1623 and is configured to stabilize the rectified power. The protection circuit 1625 is connected to the voltage stabilizing circuit 1624 and is configured to output power supply power after detecting the stabilized power.
In detail, the rectifying circuit 1623, the protection circuit 1625, and the voltage stabilizing circuit 1624 may be commonly connected to the circuit control board 1626 to perform unified control. As shown in fig. 1 and 3, a circuit control board 1626 with a rectifying circuit 1623, a voltage stabilizing circuit 1624, and a protection circuit 1625 may be fixedly installed between the fifth and sixth support plates 116, 117. The rectifying circuit 1623 may be a three-phase rectifying circuit, and the voltage stabilizing circuit 1624 may be a direct current (DC-DC) voltage stabilizing circuit. The electric energy may be stored in the battery 111 inside the thermoelectric energy power supply device, for example, a rechargeable lithium battery may be used, and the rechargeable lithium battery may be fixed between the sixth support plate 117 and the seventh support plate 118.
Further, the three-phase ac output by the generator 1621 may be converted into DC by a three-phase rectifying circuit, and then the rated voltage is output to the protection circuit 1625 and the battery 111 by a DC-DC voltage stabilizing circuit, and the protection circuit 1625 may perform over-current protection, over-charge protection, over-discharge protection, short-circuit protection, and the like on the output of the line.
FIG. 6 schematically illustrates a three-dimensional plot of generator power generation efficiency as a function of pressure, load for a subsea survey system according to an embodiment of the invention.
Further, the power generation efficiency can be improved by the efficiency point tracking method. Specifically, the DC-DC voltage stabilizing circuit may be set as a controllable unit, the DC-DC voltage stabilizing circuit, the protection circuit 1625 and the battery 111 may be regarded as a load, and the rectified DC-DC voltage stabilizing circuit, the protection circuit 1625 and the battery 111 may be controlled by the set controller, so as to ensure that the generator 1621 always operates at a maximum efficiency point, in this process, the voltage input into the DC-DC voltage stabilizing circuit in a corresponding period may be regarded as a constant value, and the DC-DC voltage stabilizing circuit, the protection circuit 1625 and the battery 111 may be adjusted according to the relationship of the power generation efficiency of the generator 1621 varying with the pressure and the load as shown in fig. 6, so as to further realize the power generation at the maximum efficiency point at the corresponding moment. In detail, the output voltage of the DC-DC voltage stabilizing circuit can be adjusted in real time by adjusting the duty ratio of the field effect transistor switch in the DC-DC voltage stabilizing circuit, so that the power generation with the maximum efficiency point is maintained.
Taking the initial pressure of the accumulator as 15MPa, the power generation operation is performed when the pressure reaches 20 MPa. When the efficiency point tracking method is not implemented, the overall power generation efficiency is 20%, and when the efficiency point tracking method is implemented, the overall power generation efficiency is 32%. The overall power generation efficiency may be the actual power generation divided by the energy stored by the accumulator.
In some embodiments, the thermoelectric energy powered device 1 further comprises a one-way valve 19. A one-way valve 19 is provided between the oil bag module 14 and the phase change heat exchange module 13, configured to allow hydraulic oil of the oil bag module 14 to flow into the phase change heat exchange module 13 in one direction.
In some embodiments, the pressurized gas is nitrogen at 0.1 Mpa.
In some embodiments, the initial pressure value of the energy storage module 15 is 15MPa.
Specifically, the housing space 12 of the housing portion 11 was filled with 0.1Mpa (1.013X10 5 Pa) of nitrogen gas was filled with 0.1MPa (1.013X10) 5 Pa) nitrogen, can promote the oil pocket oil extraction in the sealed cavity, and then can improve oil return efficiency, reaches the effect that promotes generating efficiency.
In detail, the housing space 12 of the housing 11 is filled with a fluid of 0.1Mpa (1.013X10 5 Pa) can apply pressure stabilizing pressure of 2+/-0.5 bar, and can increase the volume change rate of the phase change material to more than 11%, and compared with the volume change rate of 9% of a temperature difference energy supply device not filled with pressurized gas, the volume change rate of the phase change material reaches 22.2%.
As shown in fig. 5, an embodiment of the present invention provides a subsea survey system comprising a survey robot 2 and the above-described thermal energy powered apparatus 1. The temperature difference energy supply device 1 is mounted on the survey robot 2.
As shown in fig. 2 to 5, the electric energy stored in the thermoelectric energy supply device 1 may be output to the power supply connector of the survey robot 2 by the electric energy output end 110 fixedly mounted on the top end of the housing portion 11, for example, the electric energy output end 110 is connected to the 24V power supply connector of the survey robot 2.
The temperature difference energy supply device 1 can be used as an independent module, and can realize decoupling of energy sources and functional structures of the underwater surveying system, so that the research and development pressure can be reduced. The energy problem of the underwater surveying system can be solved, the requirements of various underwater unmanned surveying equipment can be met, the mode of combining the multi-temperature difference energy supply device 1 can be adopted, the installation difficulty is simplified, and the method is more convenient in the aspect of sea trial input.
In detail, the temperature difference energy supply device 1 can be embedded into various underwater unmanned survey systems to be used as a battery so as to solve the energy supply problem of the system. For example, in case the power supply requirement of the survey robot 2 is large, the supply of electric energy may be increased by increasing the number of the temperature difference energy supply devices 1. The temperature difference energy supply device 1 can follow the surveying robot 2 to perform profile motion under water, and supply energy to the surveying robot 2 during the floating process of the surveying robot 2.
Examples:
FIG. 7 schematically illustrates a cross-sectional view of a marine survey system according to an embodiment of the invention.
As shown in fig. 1-7, the profile motion of the underwater survey system can be divided into four phases, a surface phase, a submergence phase, a bottoming phase, and a floating phase, respectively.
Water surface stage: the phase-change hydraulic oil bag 136 is filled with hydraulic oil, and the phase-change material in the phase-change inner cavity 134 is in a liquid state, for example, the water surface temperature is 25-28 ℃, and the phase-change hydraulic oil bag 136 is extruded by the phase-change material to be in a contracted state. The hydraulic motor 161 is in an on state, the ball valve 181 is in an off state, the pressure in the accumulator is 15MPa, and the containing space 12 is filled with nitrogen gas of 0.1 MPa. The pressure in the oil bag module 14 and the pressure in the accommodating space 12 are in a static balance state, and the hydraulic oil is in a non-flowing state.
And (3) a submerging stage: as the temperature of the ocean environment decreases, the phase-change material in the phase-change cavity 134 reaches the melting point to solidify, the volume contracts, the phase-change hydraulic oil bag 136 gradually expands, the pressure in the phase-change hydraulic oil bag 136 decreases, the pressure difference between the oil bag module 14 and the phase-change hydraulic oil bag 136 increases, and the hydraulic oil is released from the oil bag module 14 in the accommodating space 12, enters the phase-change hydraulic oil bag 136 through the one-way valve 19, and forms return oil.
Bottom touching stage: the phase change material in the phase change cavity 134 is in a solid state, the phase change hydraulic oil bag 136 is in an expanded state, the pressure in the phase change hydraulic oil bag 136 is increased, the pressure difference between the oil bag module 14 and the phase change hydraulic oil bag 136 is reduced, and the hydraulic oil is in a non-flowing state.
Floating stage: as the temperature of the ocean environment increases, the phase change material in the phase change cavity 134 reaches the melting point and melts, the volume expands, the phase change hydraulic oil bag 136 gradually contracts, the pressure in the phase change hydraulic oil bag 136 increases, and the hydraulic oil is released from the phase change hydraulic oil bag 136 to the energy storage module 15 to form energy storage. In this process, the sensor 17 detects the pressure of the energy storage module 15 in real time, and when detecting that the actual pressure value in the energy storage module 15 reaches the preset pressure value, the sensor transmits the actual pressure value data of the energy storage module 15 to the circuit control board 1626, the circuit control board 1626 controls the ball valve 181 and the steering engine 182 to be opened, and hydraulic oil is released from the energy storage module 15 and flows to the energy supply module 16 through the ball valve 181. When the sensor 17 detects that the actual pressure value in the energy storage module 15 falls to a preset low pressure value, the steering engine 182 controls the ball valve 181 to be closed.
In the process that hydraulic oil flows from the energy storage module 15 to the energy supply module 16, the hydraulic oil drives the hydraulic motor 161 to work, the hydraulic motor 161 drives the generator 1621 to output three-phase alternating current through the coupler 1622, and the output three-phase alternating current sequentially passes through the three-phase rectifying circuit, the DC-DC voltage stabilizing circuit and the protection circuit 1625 and is converted into self-adaptive direct current which can adapt to the output voltage of the optimal efficiency point at the current moment to charge the rechargeable lithium battery, so that the rechargeable lithium battery is charged. In case the phase change material is completely melted, the charging process is stopped.
It should be noted that, in the embodiments, directional terms, such as "upper", "lower", "front", "rear", "left", "right", etc., refer to the directions of the drawings only, and are not intended to limit the scope of the present invention. Like elements are denoted by like or similar reference numerals throughout the drawings. Conventional structures or constructions will be omitted when they may cause confusion in understanding the present invention, and the shapes and dimensions of the respective components in the drawings do not reflect actual sizes and proportions, but merely illustrate the contents of the embodiments of the present invention.
Unless otherwise known, the numerical parameters in this specification and the attached claims are approximations that may vary depending upon the desired properties sought to be obtained by the present disclosure. In particular, all numbers expressing quantities of ingredients, reaction conditions, and so forth used in the specification and claims are to be understood as being modified in all instances by the term "about". In general, the meaning of expression is meant to include a variation of + -10% in some embodiments, a variation of + -5% in some embodiments, a variation of + -1% in some embodiments, and a variation of + -0.5% in some embodiments by a particular amount.
The use of ordinal numbers such as "first," "second," "third," etc., in the description and the claims to modify a corresponding element does not by itself connote any ordinal number of elements or the order of manufacturing or use of the ordinal numbers in a particular claim, merely for enabling an element having a particular name to be clearly distinguished from another element having the same name.
Furthermore, unless specifically described or steps must occur in sequence, the order of the above steps is not limited to the list above and may be changed or rearranged according to the desired design. In addition, the above embodiments may be mixed with each other or other embodiments based on design and reliability, i.e. the technical features of the different embodiments may be freely combined to form more embodiments.
The objects, technical solutions and advantageous effects of the present invention will be described in further detail in the above embodiments, it should be understood that the above are only embodiments of the present invention and are not IB223248
Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A thermoelectric energy supply apparatus, comprising:
a housing portion having an accommodation space formed therein, the accommodation space being filled with a pressurized gas;
the phase-change heat exchange module is arranged outside the shell part, a phase-change material is arranged inside the phase-change heat exchange module, and the phase-change material changes phase along with the change of external temperature, so that the pressure in the phase-change heat exchange module is increased or decreased;
an oil bag module disposed inside the housing part and configured to deliver hydraulic oil to the phase change heat exchange module based on a pressure provided by the pressurized gas in a case where the pressure inside the phase change heat exchange module is reduced;
the energy storage module is communicated with the phase-change heat exchange module and is configured to receive hydraulic oil from the phase-change heat exchange module under the condition that the pressure in the phase-change heat exchange module becomes large; and
and the energy supply module is communicated with the energy storage module and is configured to allow hydraulic oil in the energy storage module to flow to the oil bag module under the condition that the actual pressure value of the energy storage module exceeds a preset pressure value, and convert the overflow pressure of the actual pressure value exceeding the preset pressure value into power supply electric energy and store the power supply electric energy into a battery.
2. The thermoelectric energy powered device of claim 1, further comprising:
and the sensor is arranged between the energy storage module and the phase change heat exchange module and is configured to detect the pressure of the energy storage module.
3. The thermoelectric energy powered device of claim 2, further comprising:
and a control valve, which is arranged between the energy storage module and the energy supply module, and is configured to allow hydraulic oil to flow from the energy storage module to the energy supply module when the sensor detects that the actual pressure value in the energy storage module exceeds the preset pressure value.
4. The thermoelectric energy powered device of claim 2, wherein the power module comprises:
the first end of the hydraulic motor is communicated with the energy storage module, the second end of the hydraulic motor is communicated with the oil bag module, and when the sensor detects that the actual pressure value of the energy storage module exceeds a preset pressure value, the phase-change heat exchange module and/or the hydraulic oil of the energy storage module drive the hydraulic motor to rotate so as to allow the hydraulic oil to flow into the oil bag module from the hydraulic motor; and
and the energy conversion module is driven by the hydraulic motor to generate and store electric energy.
5. The thermoelectric energy powered device of claim 4, wherein the transduction module further comprises:
a generator connected to the third end of the hydraulic motor and configured to generate electric energy under the drive of the hydraulic motor; and
the power generator is connected with the hydraulic motor through the coupler.
6. The thermoelectric energy powered device of claim 5, wherein the transduction module further comprises:
a rectifying circuit, connected to the generator, configured to rectify the electric energy;
the voltage stabilizing circuit is connected with the rectifying circuit and is configured to stabilize the rectified electric energy;
and the protection circuit is connected with the voltage stabilizing circuit and is configured to output the power supply electric energy after detecting the electric energy after voltage stabilization.
7. The thermoelectric energy powered device of claim 1, further comprising:
the one-way valve is arranged between the oil bag module and the phase-change heat exchange module and is configured to allow hydraulic oil of the oil bag module to flow into the phase-change heat exchange module in one way.
8. The thermoelectric energy powered device of claim 1, wherein the pressurized gas is nitrogen at 0.1 Mpa.
9. The thermoelectric energy powered device of claim 1, wherein the initial pressure value of the energy storage module is 15MPa.
10. A subsea survey system, comprising:
a survey robot; and
the thermal energy powered apparatus of any of claims 1 to 9, mounted on said survey robot.
CN202310242274.0A 2023-03-14 2023-03-14 Temperature difference energy supply device and underwater surveying system Pending CN116404907A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310242274.0A CN116404907A (en) 2023-03-14 2023-03-14 Temperature difference energy supply device and underwater surveying system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310242274.0A CN116404907A (en) 2023-03-14 2023-03-14 Temperature difference energy supply device and underwater surveying system

Publications (1)

Publication Number Publication Date
CN116404907A true CN116404907A (en) 2023-07-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310242274.0A Pending CN116404907A (en) 2023-03-14 2023-03-14 Temperature difference energy supply device and underwater surveying system

Country Status (1)

Country Link
CN (1) CN116404907A (en)

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