阅读说明：本技术 一种基于太阳能—海洋温差能的水下动力装置发电系统 (Power generation system of underwater power device based on solar energy-ocean temperature difference energy ) 是由 陈凌云 赵建辉 �田润 何强 于 2021-09-14 设计创作，主要内容包括：本发明的目的在于提供一种基于太阳能—海洋温差能的水下动力装置发电系统,太阳能电池板连接第一蓄电池,第一蓄电池连接负载,温差发电组件第二蓄电池,第二蓄电池与第一蓄电池并联,并连接负载,冷却通道的两头分别连接深层低温海水冷却通道水泵和三通阀,深层低温海水冷却通道水泵和三通阀分别连接低温海水箱,三通阀还连接冷凝器,低温海水箱通过冷凝器单向阀连接冷凝器,储液罐的两端分别连接冷凝器和换热器,动力涡轮分别连接冷凝器和换热器,发电机通过逆变装置连接第二蓄电池。本发明实现水上-水下持续发电,保证水下动力装置在工作时有充足的电力供给,达到大幅提高水下动力装置的工作效率和长续航能力的目的。(The invention aims to provide a power generation system of an underwater power device based on solar energy-ocean temperature difference energy, wherein a solar cell panel is connected with a first storage battery, the first storage battery is connected with a load, a temperature difference power generation assembly is connected with a second storage battery, the second storage battery is connected with the first storage battery in parallel and is connected with the load, two ends of a cooling channel are respectively connected with a deep low-temperature seawater cooling channel water pump and a three-way valve, the deep low-temperature seawater cooling channel water pump and the three-way valve are respectively connected with a low-temperature seawater tank, the three-way valve is also connected with a condenser, the low-temperature seawater tank is connected with the condenser through a condenser one-way valve, two ends of a liquid storage tank are respectively connected with the condenser and a heat exchanger, a power turbine is respectively connected with the condenser and the heat exchanger, and a generator is connected with the second storage battery through an inverter. The invention realizes the continuous power generation on water and underwater, ensures that the underwater power device has sufficient power supply when in work, and achieves the purpose of greatly improving the work efficiency and the long endurance of the underwater power device.)

1. The utility model provides an underwater power device power generation system based on solar energy-ocean thermal energy, characterized by: the solar energy heat storage device comprises a solar cell panel, a first storage battery, a second storage battery, a condenser, a heat exchanger, a heat storage water sump and a liquid storage tank, wherein a phase change heat storage device, a thermoelectric generation assembly and a cooling channel are arranged in the solar cell panel, the solar cell panel is provided with a light radiation sensor and is connected with the first storage battery, the first storage battery is connected with a load through a first storage battery switch, the thermoelectric generation assembly is connected with the second storage battery through a rectifying device, the second storage battery is connected with the first storage battery in parallel and is connected with the load through a second storage battery switch, two ends of the cooling channel are respectively connected with a deep low-temperature seawater cooling channel water pump and a three-way valve, the deep low-temperature seawater cooling channel water pump and the three-way valve are respectively connected with a low-temperature seawater tank, a first temperature sensor is arranged between the three-temperature seawater tank, the three-way valve is also connected with the condenser, and the low-temperature seawater tank is connected with the condenser through a condenser one-way valve, the condenser and the heat exchanger are connected to the two ends of the liquid storage tank respectively, the working medium pump is arranged between the liquid storage tank and the heat exchanger, the power turbine is coaxial with the generator, the condenser and the heat exchanger are connected to the power turbine respectively, the generator is connected with the second storage battery through the inverter, the heat exchanger is connected to the upper layer and the lower layer of the heat storage water sump respectively to form circulation, and the second temperature sensor and the heat exchanger one-way valve are arranged between the upper layer of the heat storage water sump and the heat exchanger.

2. The system of claim 1, wherein the underwater power plant generates electricity based on solar energy-ocean thermal energy, and comprises: the fuel cell system is characterized by further comprising a proton exchange membrane fuel cell, wherein the proton exchange membrane fuel cell is connected with the hydrogen storage tank through a hydrogen pressure regulating valve, the proton exchange membrane fuel cell is connected with the air storage tank through an air pressure regulating valve, and the proton exchange membrane fuel cell is connected with a load.

3. The power generation system of the underwater power device based on the solar energy-ocean temperature difference energy as claimed in claim 1 or 2, which is characterized in that: the first storage battery switch, the second storage battery switch, the optical radiation sensor, the three-way valve, the first temperature sensor, the second temperature sensor, the condenser one-way valve, the heat exchanger one-way valve, the working medium pump, the hydrogen pressure regulating valve and the air pressure regulating valve are all connected with the central control unit.

4. The system of claim 3, wherein the underwater power plant generates electricity based on solar energy-ocean thermal energy, and comprises: when the solar cell panel is positioned on the water surface, the light radiation sensor detects the light radiation intensity of the sun and transmits data to the central control unit, the central control unit outputs control signals to the first storage battery switch and the second storage battery switch, so that the first storage battery switch is closed, the second storage battery switch is opened, electric energy generated by the solar cell panel receiving solar radiation is stored in the first storage battery, the first storage battery supplies energy to a load, the phase change heat accumulator absorbs waste heat generated by the solar cell panel, the central control unit calculates the time for the phase change heat accumulator to complete phase change heat accumulation through the collected data of the light radiation sensor until the first storage battery completes energy storage, and the phase change heat accumulator completes phase change heat accumulation.

5. The system of claim 3, wherein the underwater power plant generates electricity based on solar energy-ocean thermal energy, and comprises: when the solar cell is positioned underwater, the heat storage water sump absorbs surface layer seawater, the first temperature sensor monitors the temperature of the heat storage water sump in real time and transmits the temperature data to the central control unit, the second temperature sensor monitors the temperature data of the seawater in real time and transmits the temperature data to the central control unit, the central control unit judges whether the temperature difference meeting the requirement of underwater power generation is met or not, after the temperature difference required by the power generation system is met, the central control unit controls the opening of the one-way valve of the cooling channel, the three-way valve opens the direction of the cooling channel, the deep layer low-temperature deep seawater enters the cooling channel, the temperature difference power generation assembly utilizes the solar energy waste heat stored in the phase change heat accumulator as a heat source, the deep layer low-temperature seawater is used as a refrigerant for thermoelectric conversion, the electric energy generated by the temperature difference power generation assembly is stored in the second storage battery through the rectifying device, the central control unit controls the opening of the working medium pump, the opening of the condenser of the three-way valve, and the one-way valve of the condenser is opened, the heat exchanger one-way valve is opened, the heat exchanger utilizes the heat storage water sump as a heat source, organic working media enter the heat exchanger through the working medium pump to absorb heat and become superheated steam, the superheated steam enters the power turbine to expand and do work, the power turbine drives the generator to work to generate electric energy, the electric energy generated by the generator is stored in the second storage battery after passing through the inverter, the superheated steam enters the condenser after the power turbine does work, and the superheated steam returns to the liquid storage tank after being condensed into saturated liquid through low-temperature seawater in the condenser to participate in the next organic Rankine cycle.

6. The system of claim 3, wherein the underwater power plant generates electricity based on solar energy-ocean thermal energy, and comprises: the central control unit selects a power supply mode through load feedback to realize power supply distribution; the first working state is that the first storage battery switch is closed, the second storage battery switch is opened, the second storage battery only stores electric energy generated by the heat accumulating type temperature difference power generation module and the ocean temperature difference energy-organic Rankine cycle power generation module, and the first storage battery provides electric power output for a load; the second working state is that the first storage battery switch is closed, the second storage battery switch is closed, and the first storage battery and the second storage battery are used for supplying power jointly; and in the third state, when the electric energy of the first storage battery and the second storage battery is exhausted, the hydrogen fuel cell power generation module is used as a supplementary energy source, the central control unit regulates the hydrogen pressure regulating valve and the air pressure regulating valve, and the proton exchange membrane fuel cell is started.

Technical Field

The invention relates to a power generation system, in particular to an underwater power generation system.

Background

The solar photovoltaic power generation technology has the advantages of environmental protection, cleanness, safety, simple and convenient maintenance and the like, so that the development is rapid in recent years, and a photovoltaic power generation system mainly comprises a solar cell panel, a controller and a storage battery. Solar panels are the core part of photovoltaic power generation systems and function to convert energy in light radiation directly into electrical energy. The ocean thermal energy power generation technology has the advantages of safety, environmental protection, cleanness and the like as a novel energy utilization mode, and because the seawater temperature difference contains huge energy, the thermoelectric power generation has wide application prospect in the power supply field of an underwater power device, but the dependence of the power generation by utilizing the thermal energy on the environment is higher.

The vigorous development of the automatic control technology provides technical support for improving the power supply efficiency and reducing the power supply loss. Due to instability and discontinuity of solar energy, the working condition of an electric power system can be influenced by ocean currents, weather conditions and the like when the underwater power device works in practice, an automatic control system can judge the practical working condition through sensor feedback and load feedback, the working state of each submodule of a power generation system is adjusted, power supply distribution is achieved, and normal work and long endurance of the underwater power device are guaranteed.

The patent "a high-efficient hybrid ocean thermoelectric generation system" (CN101737282A) proposes to utilize solar energy to heat warm sea water in order to improve circulation efficiency to utilize solar energy to the phase change material heat accumulation with supplementary heat transfer when the light radiation energy is not enough, nevertheless can't be according to weather and the work of load automatic control power generation module and realize the power supply distribution, when being used for underwater power device, has the energy conversion inefficiency, the heavy scheduling problem of equipment.

Disclosure of Invention

The invention aims to provide an underwater power device power generation system based on solar energy-ocean temperature difference energy, which can realize continuous power generation on water and underwater.

The purpose of the invention is realized as follows:

the invention relates to a power generation system of an underwater power device based on solar energy-ocean temperature difference energy, which is characterized in that: the solar energy heat storage device comprises a solar cell panel, a first storage battery, a second storage battery, a condenser, a heat exchanger, a heat storage water sump and a liquid storage tank, wherein a phase change heat storage device, a thermoelectric generation assembly and a cooling channel are arranged in the solar cell panel, the solar cell panel is provided with a light radiation sensor and is connected with the first storage battery, the first storage battery is connected with a load through a first storage battery switch, the thermoelectric generation assembly is connected with the second storage battery through a rectifying device, the second storage battery is connected with the first storage battery in parallel and is connected with the load through a second storage battery switch, two ends of the cooling channel are respectively connected with a deep low-temperature seawater cooling channel water pump and a three-way valve, the deep low-temperature seawater cooling channel water pump and the three-way valve are respectively connected with a low-temperature seawater tank, a first temperature sensor is arranged between the three-temperature seawater tank, the three-way valve is also connected with the condenser, and the low-temperature seawater tank is connected with the condenser through a condenser one-way valve, the condenser and the heat exchanger are connected to the two ends of the liquid storage tank respectively, the working medium pump is arranged between the liquid storage tank and the heat exchanger, the power turbine is coaxial with the generator, the condenser and the heat exchanger are connected to the power turbine respectively, the generator is connected with the second storage battery through the inverter, the heat exchanger is connected to the upper layer and the lower layer of the heat storage water sump respectively to form circulation, and the second temperature sensor and the heat exchanger one-way valve are arranged between the upper layer of the heat storage water sump and the heat exchanger.

The present invention may further comprise:

1. the fuel cell system is characterized by further comprising a proton exchange membrane fuel cell, wherein the proton exchange membrane fuel cell is connected with the hydrogen storage tank through a hydrogen pressure regulating valve, the proton exchange membrane fuel cell is connected with the air storage tank through an air pressure regulating valve, and the proton exchange membrane fuel cell is connected with a load.

2. The first storage battery switch, the second storage battery switch, the optical radiation sensor, the three-way valve, the first temperature sensor, the second temperature sensor, the condenser one-way valve, the heat exchanger one-way valve, the working medium pump, the hydrogen pressure regulating valve and the air pressure regulating valve are all connected with the central control unit.

3. When the solar cell panel is positioned on the water surface, the light radiation sensor detects the light radiation intensity of the sun and transmits data to the central control unit, the central control unit outputs control signals to the first storage battery switch and the second storage battery switch, so that the first storage battery switch is closed, the second storage battery switch is opened, electric energy generated by the solar cell panel receiving solar radiation is stored in the first storage battery, the first storage battery supplies energy to a load, the phase change heat accumulator absorbs waste heat generated by the solar cell panel, the central control unit calculates the time for the phase change heat accumulator to complete phase change heat accumulation through the collected data of the light radiation sensor until the first storage battery completes energy storage, and the phase change heat accumulator completes phase change heat accumulation.

4. When the solar cell is positioned underwater, the heat storage water sump absorbs surface layer seawater, the first temperature sensor monitors the temperature of the heat storage water sump in real time and transmits the temperature data to the central control unit, the second temperature sensor monitors the temperature data of the seawater in real time and transmits the temperature data to the central control unit, the central control unit judges whether the temperature difference meeting the requirement of underwater power generation is met or not, after the temperature difference required by the power generation system is met, the central control unit controls the opening of the one-way valve of the cooling channel, the three-way valve opens the direction of the cooling channel, the deep layer low-temperature deep seawater enters the cooling channel, the temperature difference power generation assembly utilizes the solar energy waste heat stored in the phase change heat accumulator as a heat source, the deep layer low-temperature seawater is used as a refrigerant for thermoelectric conversion, the electric energy generated by the temperature difference power generation assembly is stored in the second storage battery through the rectifying device, the central control unit controls the opening of the working medium pump and the opening of the condenser of the three-way valve, the condenser one-way valve is opened, the heat exchanger utilizes the heat storage water sump as a heat source, organic working media enter the heat exchanger through the working medium pump to absorb heat and become superheated steam, the superheated steam enters the power turbine to expand and do work, the power turbine drives the generator to work to generate electric energy, the electric energy generated by the generator is stored in the second storage battery after passing through the inverter, the superheated steam enters the condenser after the power turbine does work, and the superheated steam returns to the liquid storage tank after being condensed into saturated liquid by low-temperature seawater in the condenser to participate in the next organic Rankine cycle.

5. The central control unit selects a power supply mode through load feedback to realize power supply distribution; the first working state is that the first storage battery switch is closed, the second storage battery switch is opened, the second storage battery only stores electric energy generated by the heat accumulating type temperature difference power generation module and the ocean temperature difference energy-organic Rankine cycle power generation module, and the first storage battery provides electric power output for a load; the second working state is that the first storage battery switch is closed, the second storage battery switch is closed, and the first storage battery and the second storage battery are used for supplying power jointly; and in the third state, when the electric energy of the first storage battery and the second storage battery is exhausted, the hydrogen fuel cell power generation module is used as a supplementary energy source, the central control unit regulates the hydrogen pressure regulating valve and the air pressure regulating valve, and the proton exchange membrane fuel cell is started.

The invention has the advantages that:

1. the solar photovoltaic power generation technology and the heat accumulating type temperature difference power generation technology are combined, the waste heat of the solar cell panel is utilized, the underwater power device can continuously and efficiently generate power in a dark environment, the influence of instability and discontinuity of solar energy on the actual work of the underwater power device is reduced, the working efficiency of the solar cell panel is improved, and the solar energy utilization rate is improved.

2. The organic Rankine cycle power generation module driven by the ocean temperature difference energy is added, a heat storage water sump with two functions of changing gravity and storing heat is used, power generation and energy supply are achieved by utilizing the seawater temperature difference energy, and available energy is increased on the premise of not influencing load.

3. The working state of the power generation system is adjusted by the automatic control system, continuous power generation on water and underwater is realized, sufficient power supply is guaranteed when the underwater power device works, power supply distribution is realized by adjusting the working state of the power supply system by the automatic control system, normal work of the underwater power device is guaranteed, and the cruising ability of the underwater power device is enhanced.

4. The proton exchange membrane fuel cell is added as a supplementary and emergency energy source, the reliability of the power generation system is improved, the risk of accidents is reduced, and a safe and efficient power supply system is provided for the underwater power device.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of an automatic control system of the present invention.

Detailed Description

The invention will now be described in more detail by way of example with reference to the accompanying drawings in which:

with reference to fig. 1-2, the power generation system of the underwater power device based on solar energy-ocean temperature difference energy comprises a solar photovoltaic power generation module, a heat accumulation type temperature difference power generation module, an ocean temperature difference energy-organic rankine cycle power generation module, a proton exchange membrane fuel cell power generation module and an automatic control system.

The solar photovoltaic power generation module comprises a solar cell panel 1, a controller 2 and a first storage battery 4. The solar cell panel 1 is connected to a first battery 4 via a controller 2.

The heat accumulating type thermoelectric generation module comprises a thermoelectric generation assembly 31, a phase change heat accumulator 32, a phase change heat accumulation material, a cooling channel 30, a rectifying device 3 and a second storage battery 8. The phase change heat storage material is stored by the phase change heat accumulator 32, and the phase change heat accumulator 32 absorbs the waste heat at the bottom of the solar cell panel 1; the cooling passage 30 is located below the thermoelectric generation element 31 and contacts the surface of the thermoelectric generation element 31. The thermoelectric generation module 31 is connected to the second battery 8 via the rectifying device 3.

The ocean temperature difference energy-organic Rankine cycle power generation module comprises a liquid storage tank 22, a heat storage water bin 23, an organic working medium, a heat exchanger 18, a power turbine 17, a condenser 24, a working medium pump 20, a power generator 10 and an inverter 9, wherein the heat storage water bin 23 is connected with the heat exchanger 18 through an automatic control unit, and the condenser 24 is connected with deep seawater through a three-way valve 26 and a one-way valve 25. The organic working medium enters the heat exchanger 18 from the liquid storage tank 22 through the working medium pump 20 to absorb heat and become superheated steam. The outlet of the cold side of the heat exchanger 18 is connected with the power turbine 17, the steam passing through the power turbine enters the inlet of the condenser 24, the outlet of the condenser 24 is connected with the inlet of the liquid storage tank 22, and the organic working medium completes the circulation. The power turbine 17 is arranged coaxially with the generator 10, and the generator 10 is connected with the second storage battery 8 through the inverter device 9.

The proton exchange membrane fuel cell power generation module comprises a hydrogen tank 14, a compressed air tank 15, proton exchange membrane fuel cell pressure regulating valves 12 and 13 and a proton exchange membrane fuel cell 11, wherein the hydrogen tank 14 and the compressed air tank 15 are respectively connected with fuel and combustion improver inlets of the proton exchange membrane fuel cell through the proton exchange membrane fuel cell pressure regulating valves 12 and 13, and the proton exchange membrane fuel cell 11 directly provides power for a load.

The automatic control system comprises temperature sensors 21 and 27, an optical radiation sensor 2, a central control unit 16, proton exchange membrane fuel cell pressure regulating valves 12 and 13, a deep low-temperature seawater cooling channel water pump 29, a heat exchanger check valve 19, a condenser check valve 25 and a three-way valve 26. The optical radiation sensor 2 is embedded on the surface of the solar cell panel 1, a first temperature sensor 21 (for measuring the temperature of the heat storage water sump) is connected with a heat storage water sump 23 of the organic Rankine cycle power generation system, a second temperature sensor 27 (for measuring the ambient temperature) is positioned at the inlet end of a cooling channel 30, the central control unit 16 is connected with each sensor, the proton exchange membrane fuel cell pressure regulating valves 12 and 13 are positioned at two air inlets of the proton exchange membrane fuel cell 11, and a control signal of the central control unit 16 is transmitted to the proton exchange membrane fuel cell pressure regulating valves 12 and 13 through a circuit, the organic Rankine cycle working medium pump 20, the heat exchanger check valve 19, the condenser check valve 25 and the three-way valve 26.

The solar cell panel 1 directly converts light radiation energy into electric energy using a photovoltaic effect. The first storage battery 4 charged by the solar photovoltaic power generation module is used as a main power supply device when the underwater power device sails underwater.

The solar cell panel 1 conducts heat with the phase change heat storage material, and the thermoelectric generation assembly 31 directly converts the temperature difference energy into electric energy by taking the waste heat absorbed by the phase change heat storage material as a heat source and deep low-temperature seawater as a refrigerant.

The ocean temperature difference energy-organic Rankine cycle power generation module utilizes the ocean temperature difference energy for power supply. When the submerged underwater solar water heater is ready to submerge, surface layer seawater is stored in the heat storage water bin 23 on the water surface, after the submerged underwater solar water heater is submerged, heat is provided for the heat exchanger 18 through the heat storage water bin 23, the condenser 24 is supported by deep low-temperature seawater circulation to work, and organic Rankine cycle power generation is carried out.

And a second storage battery 8 charged by the heat accumulating type temperature difference power generation module and the ocean temperature difference energy-organic Rankine cycle power generation module is used as a supplementary power supply and a cruising power supply for high-power operation of the underwater power device during underwater navigation.

The proton exchange membrane fuel cell power generation module is used as a supplementary and emergency power supply when the underwater power device works underwater.

The automatic control system judges the position of the underwater power device according to the data of the optical radiation sensor 2 and calculates the energy storage time; controlling the on-off of a condenser check valve 25, a heat exchanger check valve 19, a deep low-temperature seawater cooling channel water pump 29 and a three-way valve 26 according to the data of the temperature sensors 21 and 27, and adjusting the running speed of a working medium pump 20 to enable the ocean temperature difference energy-organic Rankine cycle power generation module to generate the maximum power generation benefit; the speed of hydrogen and air entering a fuel cell reaction assembly is adjusted according to the load feedback and the working state of the proton exchange membrane fuel cell 11, so that the power generation module of the proton exchange membrane fuel cell operates efficiently, stably and safely; and adjusting a power supply mode according to the load feedback and the battery data, so that the underwater power device can work efficiently.

The solar energy heat storage device comprises a solar cell panel 1, an optical radiation sensor 2, a rectifying device 3, a first storage battery 4, a first storage battery switch 5, a load 6, a second storage battery switch 7, a second storage battery 8, an inverter device 9, a generator 10, a proton exchange membrane fuel cell 11, a hydrogen pressure regulating valve 12, an air pressure regulating valve 13, a hydrogen storage tank 14, an air storage tank 15, a central control unit 16, a power turbine 17, a heat exchanger 18, a heat exchanger one-way valve 19, a working medium pump 20, a temperature sensor 21, a liquid storage tank 22, a heat storage water bin 23, a condenser 24, a condenser one-way valve 25, a three-way valve 26, a temperature sensor 27, a low-temperature sea water tank 28, a deep low-temperature sea water cooling channel water pump 29, a cooling channel 30, a temperature difference power generation assembly 31 and a phase change heat accumulator 32.

When the underwater power device works on the water surface, the light radiation sensor 1 detects the solar radiation intensity and transmits data to the central control unit 16, and the central control unit 16 outputs control signals to the first storage battery switch 5 and the second storage battery switch 7, so that the first storage battery switch 5 is closed, and the second storage battery switch 7 is opened. The solar panel 1 receives solar radiation to start working, electric energy generated by the working of the solar panel is stored in the first storage battery 4 after voltage and current of the electric energy are adjusted by the built-in controller, and the first storage battery 4 supplies energy to the load 6. The solar cell panel 1 can generate a large amount of waste heat in the working process, the phase change heat accumulator 32 in the heat accumulation type thermoelectric power generation module absorbs the waste heat generated by the solar cell panel, hexadecane is used as a solid-liquid phase change material in the phase change heat accumulator 32, the central control unit 16 calculates the time of the phase change material for completing the phase change heat accumulation according to the collected data of the optical radiation sensor 2, and when the first storage battery 4 completes energy storage and the phase change material in the phase change heat accumulator 32 completes the phase change heat accumulation, the underwater power device dives.

When the underwater power device generates power underwater, the underwater power device absorbs surface layer seawater to enter the heat storage water sump 23 when on the water surface, the temperature sensor 21 monitors the temperature of the heat storage water sump 23 in real time and transmits the temperature to the central control unit 16, the temperature of vertical seawater is gradually reduced along with the submergence of the underwater power device, the temperature sensor 27 monitors the temperature data of seawater 28 in real time and transmits the temperature data to the central control unit 16, the central control unit 16 judges whether the start-up requirement meets the working condition of an underwater power generation module, and after the temperature difference required by the work of a power generation system is met, the central control unit 16 controls the opening of the one-way valve 29 of the cooling channel and the opening of the cooling channel direction of the three-way valve 26, the deep low-temperature seawater enters the cooling channel 30, the thermoelectric generation assembly 31 utilizes the solar energy waste heat stored in the phase change heat reservoir as a heat source, the deep low-temperature seawater is used as a refrigerant for thermoelectric conversion, and the electric energy generated by the thermoelectric generation assembly 31 is stored in the second storage battery 8 through the rectifying device 3. The central control unit 16 controls the working medium pump 20 to be opened, the condenser direction of the three-way valve 26 is opened, the condenser one-way valve 29 is opened, the heat exchanger one-way valve 19 is opened, the heat exchanger 19 utilizes the heat storage water bin 23 as a heat source, the organic working medium enters the heat exchanger 18 through the working medium pump 20 to absorb heat and become superheated steam, the superheated steam enters the power turbine 17 to expand and do work, the power turbine 17 and the generator 10 are coaxially arranged, the power turbine 17 drives the generator 10 to work to generate electric energy, the electric energy generated by the generator 10 is stored in the second storage battery 8 after passing through the inverter device 9, the superheated steam enters the condenser 24 after the power turbine 17 does work, the superheated steam is condensed into saturated liquid through the low-temperature seawater 28 in the condenser 24 and then returns to the liquid storage tank 22 to participate in the next organic Rankine cycle.

The central control unit selects a power supply mode through load feedback when the underwater power device works, and power supply distribution is realized. The first working state is that when the underwater power device normally works on the water surface and under the low load, the first storage battery switch 4 is closed, the second storage battery switch 7 is opened, the second storage battery 8 only stores electric energy generated by the heat accumulating type temperature difference power generation module and the ocean temperature difference energy-organic Rankine cycle power generation module, and the first storage battery 4 provides electric power output for the load. And the second working state is that when the underwater power device works under the conditions that the electric energy of the first storage battery 4 is insufficient or the underwater high load is high, the first storage battery switch 5 is closed, the second storage battery switch 7 is closed, and the first storage battery 4 and the second storage battery 8 are used for jointly supplying power, so that the underwater power device is guaranteed to keep high-efficiency normal work. In the third working state, when the electric energy of the first storage battery 4 and the second storage battery 8 is exhausted, the hydrogen fuel cell power generation module is used as a supplementary energy source, the central control unit adjusts the hydrogen pressure adjusting valve 12 and the air pressure adjusting valve 13 of the hydrogen fuel cell, and the hydrogen fuel cell 11 is started. Meanwhile, the underwater power device floats to the water surface at a proper time and starts to store energy again.