CN114087147B - Full-submersible type ocean temperature difference energy underwater energy supply system - Google Patents
Full-submersible type ocean temperature difference energy underwater energy supply system Download PDFInfo
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Abstract
The utility model provides a full latent formula ocean temperature difference energy is energy supply system under water, including setting up the sea water transport module under the sea, the electricity generation module with store up the module of charging, the sea water transport module includes cold sea water pipeline, warm sea water efflux pipeline with higher speed, warm and cold sea water hybrid pipeline and hydroelectric power conversion equipment, the electricity generation module adopts closed ocean temperature difference energy power generation circulating device, including dividing wall formula evaporimeter, integration turbogenerator, dividing wall formula condenser, working medium pump and withstand voltage storehouse, the entry setting of warm sea water efflux pipeline with higher speed is in the warm sea water of top layer, the export is connected with dividing wall formula evaporimeter, the entry setting of cold sea water pipeline is in deep cold sea water, the export is connected with dividing wall formula condenser. The invention provides the autonomous underwater vehicle using the battery as power to autonomously finish electric energy supply nearby underwater, and solves the long-term renewable and high-power energy supply requirement of the autonomous underwater vehicle on the bottom of the deep and far sea.
Description
Technical Field
The invention relates to the technical field of underwater energy, in particular to a fully-submersible type ocean temperature difference energy underwater energy supply system.
Background
An autonomous underwater vehicle is high-tech equipment for underwater monitoring and detecting oceans, and is widely applied to the fields of oceanic environment investigation, seabed resource survey and the like. At present, the energy required by the autonomous underwater vehicle mainly depends on the carried storage battery pack, and limited power sources not only have great limitations on the navigation speed, the cruising ability, the working range and the bearing capacity of load equipment. Therefore, the search for a sustainable, safe and reliable energy supply solution is a problem that must be solved for the development of autonomous underwater vehicles.
At present, there are four energy supply modes for autonomous underwater vehicles, including recovery charging, self-contained fuel power supply, power supply from cable-tied shore stations, and power supply from renewable energy sources. Wherein, the recycling charging mode has long period, high fault risk and high operation cost; although the endurance cycle of the self-contained fuel power supply is improved, the volume of the underwater vehicle is sacrificed, and the self-contained fuel power supply still needs to be periodically recovered for refueling; the power supply of the cable shore station is limited by the length of a submarine cable, and is difficult to apply to energy supply in deep and far sea; although the conventional renewable energy power supply mode mainly using solar energy, offshore wind energy and wave energy can realize unmanned energy supply under deep and far seawater, the offshore wind energy, offshore solar energy and wave energy power generation platform needs to be located above the sea surface, so that the underwater autonomous aircraft is difficult to directly supply concealed energy under water, and an energy system is easy to expose. The traditional energy supply mode of adopting solid-liquid phase change temperature difference energy satellite power supply does not have the exposure risk, but still faces the problems of short power supply time, long regeneration time, small output power and the like. In the conventional ocean temperature difference energy power generation device, a large amount of pump work is consumed in the process of lifting and conveying deep cold seawater by a pipeline, and generated electric energy is used for operation of a seawater lifting pump in a large amount, so that the self consumption of the system is overlarge, and the net output power of a temperature difference energy power generation system is reduced.
Disclosure of Invention
The invention aims to provide a fully-submersible type ocean temperature difference energy underwater energy supply system based on temperature difference drive turbine power generation, which is suitable for energy supply of a deep-sea autonomous underwater vehicle, and greatly improves the concealment of the underwater energy supply system while ensuring high power and sustainable underwater energy supply and increasing the underwater detection range of the autonomous underwater vehicle.
In order to solve the technical problems, the invention provides the following technical scheme:
the utility model provides a full latent formula ocean difference in temperature can energy supply system under water, carries module, power generation module and storage charging module, its characterized in that including the sea water that sets up under the sea: the seawater conveying module comprises a cold seawater pipeline, a warm seawater jet accelerating pipeline, a warm and cold seawater mixing pipeline and a hydroelectric power conversion device, the power generation module adopts a closed ocean temperature difference energy power generation circulating device and comprises a dividing wall type evaporator, an integrated turbine generator, a dividing wall type condenser, a working medium pump and a pressure-resistant bin, the dividing wall type evaporator, the integrated turbine generator, the dividing wall type condenser and the working medium pump are sequentially connected to form a low-boiling-point working medium circulating loop, the dividing wall type evaporator, the integrated turbine generator, the dividing wall type condenser and the working medium pump are all arranged in the pressure-resistant bin, an inlet of the warm seawater jet accelerating pipeline is arranged in surface-layer warm seawater, an outlet of the warm seawater jet accelerating pipeline is connected with the dividing wall type evaporator, an inlet of the warm seawater jet accelerating pipeline is arranged in deep-layer cold seawater, an outlet of the warm seawater mixing pipeline is connected with the dividing wall type evaporator and the dividing wall type condenser, the hydroelectric power conversion device is arranged at the outlet of the warm seawater mixing pipeline, warm seawater enters the dividing wall type evaporator through the warm seawater jet accelerating pipeline to exchange heat with the low-boiling-point heat exchange medium, and the warm seawater mixed seawater flow out of the cold seawater mixing pipeline and the cold seawater mixed seawater mixing pipeline, and the cold seawater storage module are connected with the cold seawater storage module.
Further, cold sea water pipeline adopts sandwich double-deck insulation construction, including inner tube and outer tube, adopt clearance skeleton fixed connection between inner tube and the outer tube, inner tube and outer tube are in withstand voltage storehouse department alternate segregation, wherein the inner tube export with the dividing wall formula condenser is connected, the outer tube export with warm cold sea water mixed pipeline is connected.
Further, still include warm sea water pump, cold sea water main pump and cold sea water auxiliary pump, warm sea water pump sets up between warm sea water efflux acceleration pipe way and the dividing wall formula evaporimeter, cold sea water main pump sets up between warm cold sea water mixing pipe way and the dividing wall formula condenser, cold sea water auxiliary pump sets up between outer tube and the warm cold sea water mixing pipe way.
Furthermore, a filter screen is arranged at the inlet at the bottom of the cold seawater pipeline.
The power generation device further comprises an anchoring positioning module, wherein the anchoring positioning module comprises an anchoring concrete block, a mooring line, a sliding jacket and a floater, the anchoring concrete block is fixed on the seabed, the floater floats on the upper layer of the sea surface, the power generation module and the charging storage module are respectively connected with the anchoring concrete block and the floater through the mooring line, one end of the sliding jacket is fixedly connected to the outer pipe, and the other end of the sliding jacket is connected with the anchoring concrete block and the floater through the mooring line in a penetrating mode.
Furthermore, withstand voltage storehouse is the column tumbler structure of weight under light, withstand voltage storehouse and the bottom of storing up the module of charging are connected with abandon load.
Further, store up the module of charging through the connecting rod with the module of generating electricity is connected, stores up the module of charging and includes interconnect's accumulate device and wireless electric pile that fills.
Furthermore, the power storage device comprises an AC/DC rectifying device, a control unit and a high-density power storage unit, the integrated turbine generator is connected with the input end of the AC/DC rectifying device through a photoelectric composite cable, the photoelectric composite cable is fixed on the connecting rod, and the output end of the AC/DC rectifying device is connected with the high-density power storage unit through the control unit.
Furthermore, a low boiling point substance is adopted as a circulating working medium in the low boiling point working medium circulating loop.
Compared with the prior art, the invention has the beneficial effects that: 1. the invention provides a pump-work-free fully-submersible type ocean temperature difference energy underwater energy supply system based on the thought of 'autonomous generation-storage-transmission' of energy, which utilizes closed ocean temperature difference energy to generate power, circularly and stably supplies power and stores the power in a power storage device; 2. the seawater conveying module and the power generation module skillfully utilize ocean directional flow environment and jet flow suction, and realize the pump work-free self-lifting of cold seawater and the mixed flow hydraulic power auxiliary power generation through the pipeline hydroelectric power conversion device; 3. the whole system is completely immersed and suspended below the sea surface, so that the concealment of the underwater energy supply system is greatly enhanced; 4. the underwater energy supply can be established in different sea areas, the working range of the underwater vehicle is expanded, and the long-term renewable, autonomous and high-power supply of the deep and far sea autonomous underwater vehicle is realized; 5. the seawater conveying module adopts a sandwich double-layer heat-insulation structure to convey deep cold seawater, and the cold seawater flowing between the outer pipe wall and the inner pipe wall is used as a heat-insulation layer of the cold seawater flowing in the inner pipe, so that the cold loss in the lifting process of the cold seawater in the inner pipe is reduced; 6. the power generation module and the power storage module carry a disposable load, the upward floating of each module can be realized by unloading the disposable load, the pressure-resistant bin adopts a column type tumbler structure, and the disposable load is arranged at the bottom of the pressure-resistant bin to realize the circumferential self-balance of the device. 7. The underwater charging pile is connected with the electricity storage module in a wall-mounted integrated manner through the photoelectric composite cable, so that an underwater power supply system is formed and is used for supplying energy to an autonomous underwater vehicle taking a battery as power.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;
FIG. 2 is a schematic structural view of a pressure-resistant chamber according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a closed ocean thermal energy power generation circulating device according to an embodiment of the invention;
FIG. 4 is a schematic diagram of a closed ocean thermal energy power generation cycle according to an embodiment of the present invention;
FIG. 5 is a temperature-entropy diagram of a closed ocean thermal energy power generation cycle according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a cold seawater pipeline according to an embodiment of the invention;
fig. 7 is a partial enlarged sectional view of the structure of the cold seawater pipe according to the embodiment of the present invention.
Wherein: 101-closed ocean thermal energy power generation circulating device; 102-temperature seawater jet flow acceleration pipeline; 103-cold seawater pipeline; 104-a warm and cold seawater mixing pipeline; 106-sieve; 107-warm sea water pump; 108-cold seawater main pump; 109-cold seawater auxiliary pump; 110-dividing wall evaporator; 111-an integrated turbine generator; 112-dividing wall condenser; 113-a working medium pump; 114-a pressure-resistant bin; 115-a hydroelectric power conversion device; 201-an electricity storage device; 202-wireless charging pile; 301-anchorage concrete block; 302-mooring line; 303-a float; 304-a sliding jacket; 401-a connecting rod; 402-disposable load; 403-an underwater autonomous vehicle; 501-sea level; 502-the sea floor; 503-ocean directional flow; 601-an outer tube; 602-an inner tube; 603-gap skeleton; SL-saturated liquidus; SV-saturated gas phase line; s1, a dividing wall type condenser outlet state point; s2, a working medium pump outlet state point; s3, a working medium saturated liquid point in the dividing wall type evaporator; s4, dividing a wall type evaporator outlet state point; s5, turbine isentropic expansion outlet state points; WS-Wen seawater; CS-cold seawater; delta T PP1 -evaporator pinch temperature difference; delta T PP2 -the condenser pinch temperature difference T-temperature; s-entropy.
Detailed Description
For the understanding of the present invention, the following detailed description of the present invention is given with reference to the accompanying drawings, which are provided for illustration purposes only and are not intended to limit the scope of the present invention.
Fig. 1 shows an overall structure of an embodiment of a fully submersible ocean thermal energy underwater energy supply system suitable for energy supply of an autonomous deep-open sea underwater vehicle, which includes a seawater transportation module, a power generation module for generating electric energy by utilizing ocean thermal energy, a storage and charging module, and an anchoring and positioning module for positioning the power generation module and the storage and charging module, wherein each module is completely submerged and suspended below a sea surface 501. The power generation module is connected with the storage and charging module through the photoelectric composite cable. The seawater conveying module comprises a warm seawater jet flow accelerating pipeline 102, a cold seawater pipeline 103 for conveying cold seawater, a filter screen 106, a warm and cold seawater mixing pipeline 104 and a hydroelectric power conversion device 115 for auxiliary power generation; the power generation module adopts a closed ocean temperature difference energy power generation circulating device 101; the storage and charging modules are integrally connected to form an underwater power supply system, and the underwater power supply system comprises a power storage device 201 and a wireless charging pile 202; the anchoring positioning module comprises an anchoring concrete block 301, a mooring line 302, a floater 303 and a sliding jacket 304 connected with the outer pipe 601 of the cold seawater pipeline and the mooring line 302; the closed ocean thermal energy power generation circulating device 101 and the power storage device 201 are connected through a connecting rod 401, and both carry and are fixed with a disposable load 402, and the disposable load 402 can be abandoned through unloading to realize floating of each device.
As shown in fig. 2, the pressure-resistant cabin 114 adopts a column-type tumbler structure, the heavy disposable load 402 is concentrated at the bottom of the device to form a tumbler structure with a light top and a heavy bottom, and one side of the pressure-resistant cabin 114 is fixedly connected with the mooring line 302, so that the device can be prevented from being taken away by ocean currents. The power generation device suspended under the sea has the advantages that when no ocean current exists, the gravity and the buoyancy are opposite in direction and equal in size on the same vertical line, when the ocean current impact device inclines, the gravity and the buoyancy are not on the same vertical line, but the gravity generates resisting moment due to the fact that the gravity center of the vertical tumbler structure is located below, the circumferential self-balance of the device is achieved, and the stability of the device under the complex ocean current condition is enhanced.
As shown in fig. 3, the closed ocean thermal energy power generation circulating device 101 includes a warm seawater jet accelerating pipeline 102 disposed in a pressure-resistant bin 114, a warm seawater pump 107 for delivering warm seawater, a cold seawater main pump 108 for delivering cold seawater in an inner pipe 602 of a sandwich double-layer heat-insulating pipeline, a cold seawater auxiliary pump 109 for delivering cold seawater in an insulating layer between the inner pipe 602 and an outer pipe 601 of the sandwich double-layer heat-insulating pipeline, a dividing wall type evaporator 110 for heating and evaporating a low-boiling-point working medium by using the warm seawater, an integrated turbine generator 111 for driving a turbine to rotate and driving the generator to generate electricity by using evaporated working medium steam, a dividing wall type condenser 112 for condensing exhaust gas at a turbine outlet by using the cold seawater, and a working medium pump 113 for driving a condensed liquid working medium to enter the evaporator.
FIG. 4 shows a schematic diagram of a closed ocean thermoelectric power generation cycle working medium, in which a dividing wall type evaporator 110, an integrated turbine generator 111, a dividing wall type condenser 112 and a working medium pump 113 are sequentially connected to form a low boiling point working medium cycle loop, and low boiling point substances, such as R134a, R245fa, NH, are adopted as the cycle working medium in the loop, and the cycle working medium is R134a, R245fa, NH 3 And the like. The low-boiling point working medium exchanges heat with warm seawater in the dividing wall type evaporator 110, a saturated liquid working medium point S3 is reached inside the dividing wall type evaporator, a saturated gas state S4 is reached at the outlet of the dividing wall type evaporator 110, the saturated gas working medium enters the integrated turbine generator 111 to expand and do work, a gas-liquid two-phase state S5 is reached at the outlet of the integrated turbine generator 111, the outlet exhaust gas is radiated to cold seawater in the dividing wall type condenser 112, a saturated liquid state S1 is reached at the outlet of the dividing wall type condenser 112, and the saturated liquid working medium is pumped into the dividing wall type evaporator 110 by the working medium pump 113 to complete working medium circulation.
Fig. 5 shows the temperature entropy change of the closed ocean thermal energy power generation cycle working medium.
Fig. 6 shows the undersea positioning method of the cold seawater pipeline, the cold seawater pipeline 103 is composed of an inner pipe 602, an outer pipe 601 and a gap skeleton 603 which plays a supporting role between the outer pipe 601 and the inner pipe 602, the outer pipe 601 is fixed on a mooring line 302 through a sliding jacket 304, one end of the mooring line 302 is connected with an anchorage concrete block 301 of the seabed 502, and the other end is connected with a floater 303.
The specific working process of the above embodiment is as follows:
as shown in fig. 1, the power generation module drives the alternating current generated by the heat engine by using the temperature difference between the surface layer warm seawater and the deep layer cold seawater, a part of the generated alternating current is used for system self-consumption, and a part of the generated alternating current is transmitted to the storage and charging module through the photoelectric composite cable, is converted into stable direct current through the AC/DC rectifying device, and is stored in the power storage device 201. When the underwater autonomous vehicle 403 reaches the vicinity of the underwater wireless charging pile 202, the underwater autonomous vehicle 403 releases charging information to the charging storage module, the wireless charging pile 202 starts charging and transmits information, and when the underwater autonomous vehicle 403 finishes charging, an end signal is released, the wireless charging pile 202 is closed, and charging is finished.
The specific process of warm and cold seawater delivery is as follows:
if there is a directional ocean current 503, such as a warm ocean current, below the horizontal plane as shown in fig. 1, the warm ocean water flowing in the direction enters the warm ocean water jet acceleration pipe 102, and the warm ocean water is accelerated in the warm ocean water jet acceleration pipe 102 due to the gradual reduction of the inner diameter of the warm ocean water jet acceleration pipe 102, so as to drive the seawater in the warm and cold ocean water mixing pipe 104 to flow at a high speed. Because the outlet of the cold seawater pipeline 103 is connected with the warm and cold seawater mixing pipeline 104, the pressure at the outlet of the cold seawater pipeline 103 is reduced, the pressure difference between the inlet and the outlet of the cold seawater pipeline 103 is formed, and the pumpless self-driven lifting of the cold seawater is realized under the driving of the pressure difference. After the cold seawater and the warm seawater are mixed, a hydroelectric power conversion device 115 is arranged at the throat part of the tail end of the warm-cold seawater mixing pipeline 104, and the surplus kinetic energy of the high-speed fluid is recycled to assist in power generation and is used for system self consumption. If there is no ocean directional flow 503, as shown in fig. 3, the ocean thermal energy power generation module is configured with a warm sea water pump 107, a cold sea water main pump 108, and a cold sea water sub-pump 109, and the warm sea water pump 107 is used to deliver surface layer warm sea water, the cold sea water main pump 108 is used to deliver inner pipe cold sea water, and the cold sea water sub-pump 109 is used to deliver cold sea water for heat preservation between the inner pipe and the outer pipe.
The specific process of the underwater ocean temperature difference energy power generation is as follows:
as shown in fig. 3, after the cold seawater pipe 103 enters the pressure-resistant bin 114, the outer pipe 601 is separated from the inner pipe 602, the low-temperature deep cold seawater conveyed by the inner pipe 602 enters the dividing wall type condenser 112 to absorb heat, and the utilized deep cold seawater is mixed with the cold seawater for heat preservation, and then is mixed with the warm seawater to be discharged to the ocean. The surface layer warm seawater enters the dividing wall type evaporator 110 to release heat; the low-boiling point working medium exchanges heat with the surface-temperature seawater and evaporates in the dividing wall type evaporator 110, working medium steam generated by evaporation drives the integrated turbine generator 111 to rotate to generate alternating current, exhaust gas at the turbine outlet enters the dividing wall type condenser 112 to exchange heat with cold seawater and condense, and condensed liquid working medium is driven by the working medium pump 113 to enter the dividing wall type evaporator 110, so that a power generation cycle is completed. The alternating current output by the integrated turbine generator 111 is transmitted to the charging and storage module through a power transmission line. If the ocean directional flow 503 exists, the warm and cold seawater is mixed to drive the hydroelectric power conversion device 115 to generate power in an auxiliary mode, and the generated power is provided for the working medium pump 113 to use. If the ocean directional flow 503 does not exist, the electric quantity in the starting process of the working medium pump 113, the warm seawater pump 107, the cold seawater main pump 108 and the cold seawater auxiliary pump 109 is provided by the electricity storage device 201, and after the ocean temperature difference energy device generates electricity and supplies power stably, the self-consumption of the electricity generation device is directly supplied by the integrated turbine generator 111.
Take the south sea area as an example and assume that there is no ocean directional flow 503. As shown in fig. 1, the closed ocean temperature difference energy power generation circulating device 101 is suspended 50m underwater under the action of a floater 303, a mooring line 302 and an anchor concrete block 301. Surface layer warm seawater is pumped by a warm seawater pump 107, and deep layer cold seawater is pumped by a cold seawater main pump 108 and a cold seawater auxiliary pump 109. The inlet of the warm seawater jet accelerating pipeline 102 is positioned in a warm seawater layer 15m below the sea level, the temperature of warm seawater entering the inlet of the dividing wall type evaporator 110 is 29 ℃, the inlet of the cold seawater pipeline 103 is positioned 800m below the sea level, the water temperature is stabilized at 4 ℃, a sandwich double-layer heat-preservation structure is adopted to convey deep cold seawater, the cold seawater of the outer pipe 601 is used as a heat-preservation layer of cold seawater in the inner pipe 602, the cold loss in the lifting process of the inner pipe 602 is 1 ℃, and the temperature of cold seawater entering the inlet of the dividing wall type condenser 112 is 5 ℃.
R134a is used as a circulating working medium of the closed ocean temperature difference energy power generation circulating device 101, and the circulating working medium can be but is not limited to R134a. The circulating working medium R134a exchanges heat with surface layer warm seawater at 29 ℃ in the dividing wall type evaporator 110 with countercurrent heat exchange, the warm seawater releases heat, the temperature is reduced to 25 ℃, the R134a is heated to 24 ℃ saturated gas state, and the pressure is 0.64578MPa; the heated and evaporated R134a gaseous working medium drives the integrated turbine generator 111 to rotate at a high speed to generate electric energy; the exhaust gas at the outlet exchanges heat with cold seawater at 5 ℃ in a dividing wall type condenser 112 with countercurrent heat exchange, and the cold seawater absorbs heat and has temperatureThe temperature rises to 9 ℃, R134a is condensed into saturated liquid at 10 ℃, and the pressure is 0.41461MPa; the working medium pump 113 drives the liquid R134a into the dividing wall evaporator 110 to complete a working medium cycle. The temperature entropy diagram of the working medium circulation is shown in FIG. 5, and the temperature difference Δ T between the pinch points of the dividing wall evaporator 110 and the dividing wall condenser 112 PP1 And Δ T PP2 All at 1 ℃. When irreversible loss of the system is not counted, thermodynamic parameters of each circulating state point on the temperature-entropy diagram are obtained through the state parameters of the R134a working medium and are shown in the table 1.
Table 1: thermodynamic parameters of circulating each state point on temperature-entropy diagram
According to the thermodynamic parameters in Table 1, the heat absorption quantity delta Q of the unit mass working medium R134a in the dividing wall type evaporator 110 can be known e =198.05kJ/kg, ideal enthalpy drop delta H at inlet and outlet of turbine 1 =9.06kJ/kg, heat release Δ Q of the dividing wall condenser 112 c =188.99kJ/kg, output power P of integrated turbine generator 111 w =10kW, turbine efficiency eta w =85% mechanical efficiency η m =98%, generator efficiency η m =93%, so the required circulating working medium R134a has mass flow
Further obtains the heat absorption quantity in the evaporation process>
The heat release amount in the condensation process is greater or less>
The dividing wall evaporator 110 and the dividing wall condenser 112 are replacedHeat loss eta hl Both are 1%, and in the design process, the temperature difference delta T between the inlet and the outlet of warm seawater and cold seawater in the heat exchanger is 4 ℃, according to->
The mass flow of the warm seawater required by the dividing wall type evaporator 110 is calculated and is ^ or ^>
The mass flow of cold seawater required by the dividing wall condenser 112 is ≥ l>
In order to reduce the resistance loss of the seawater pipeline, the inner diameter D of the warm seawater pipeline is selected 1 =400mm, giving an on-way drag loss of
Total length of warm seawater pipeline l w =50m, total loss of on-way resistance Δ P w1 ＝δP w1 ·l w =30Pa, local loss of resistance based on =>
Calculating (epsilon is a local resistance coefficient) to obtain a local resistance loss of delta P w2 =349Pa. The diameter of the inner pipe of the cold seawater pipeline is D 2 =400mm, total length of pipe l c =820m, and the path resistance deltaP of the internal pipe of the cold seawater is obtained by the same method c1 =5.6Pa/m, total loss of on-way resistance Δ P c1 ＝δP c1 ·l c =4920Pa, local resistance loss Δ P c2 ＝211Pa。
In order to reduce the loss of cold seawater, the cold seawater pipeline 103 adopts a sandwich double-layer structure, and the diameter D of the outer pipe 601 of the cold seawater pipeline 3 =500mm, the flow rate of the annular space of the sleeve of the cold seawater pipeline is according to v 3 Designed according to the density of 0.1m/s, and is used for keeping the temperature to obtain the mass flow of cold seawater
The on-way resistance loss of the sleeve annulus of the cold seawater pipeline is->
Total on-way resistance loss delta P of casing annular gap c3 ＝δP c3 ·l c =1312Pa, local resistance loss Δ P c4 ＝4Pa。
In order to obtain the net output power of the closed ocean temperature difference energy power generation circulating device 101, the system self-consumption needs to be deducted, and the system self-consumption comprises the power consumption of a working medium pump 113, a warm seawater pump 107, a cold seawater main pump 108 and a cold seawater auxiliary pump 109. The working medium pump 113 is mainly used for conveying working media and improving the working medium pressure head, and the total energy delta H obtained by a unit working medium passing through the working medium pump 113 can be known according to the table 1 P =0.19kJ/kg, working medium pump 113 efficiency eta P =0.75, according to
Obtaining the total power consumption W of the working medium P =0.36kW. Power consumption W of seawater pump wP According to>
Calculation of where Q v Is the volume flow of the transported fluid, Δ P is the total resistance, η is the efficiency of the pump, the efficiency η of the warm sea water pump 107, the cold sea water main pump 108 and the cold sea water auxiliary pump 109 SP All are 0.8. The warm seawater pump 107 and the cold seawater main pump 108 need to overcome the seawater flow resistance in the heat exchanger in addition to the seawater pipeline flow resistance (including on-way resistance and local resistance), and in order to reduce the system self-consumption as much as possible, the seawater flow resistance Δ P is designed in the heat exchanger HEX Designed to a smaller value of 10000Pa. The resistance to be overcome by the warm sea water pump 107 is Δ P wP ＝ΔP w1 +ΔP w2 +ΔP HEX =10379Pa, power consumption W wP Is 0.9kW; the resistance that the cold seawater main pump 108 needs to overcome is delta P cP1 ＝ΔP c1 +ΔP c2 +ΔP HEX =15131Pa, power consumption W cP1 Is 1.25kW; the cold seawater secondary pump 109 only needs to overcome the flowing resistance of the seawater pipeline, and the resistance to be overcome is delta P cP2 ＝ΔP c3 +ΔP c4 ＝1316Pa, power consumption W cP2 Is 0.01kW. Therefore, the 10kW closed ocean thermal energy power generation device system designed in the embodiment consumes W pu ＝W wP +W cP1 +W cP2 +W P =2.52kW, and the power output to the electric storage device 201 is 7.48kW. The performance of the 10kW closed ocean thermal energy power plant is shown in table 2.
Table 2:10kW closed ocean temperature difference energy power generation device characteristic
The embodiment of the invention shows the specific design technical parameters of a 10kW underwater closed type ocean thermal energy power generation device, the design technical parameters can be but are not limited to the embodiment, and the following factors are combined in the design process: 1) The working medium with low boiling point is preferred, and the working medium with better performance is selected; 2) Cost and sea water pump power consumption need to be considered comprehensively in the sea water pipeline design lectotype in-process, and system pump power consumption mainly concentrates on cold sea water pipeline, and although increase cold sea water pipeline latus rectum can reduce the pump power consumption, nevertheless can bring the increase of cold sea water tubular product cost and the degree of difficulty of construction. 3) If there is a directional flow of the ocean, the required power consumption of the seawater pump can be eliminated.
The invention aims to provide an energy supply system of a deep and distant underwater vehicle by utilizing ocean temperature difference energy, and the energy supply system can autonomously, reliably and stably generate electric energy by an underwater closed ocean temperature difference energy power generation circulation technology; the long-term absorption and the short-term release of the energy storage device to the energy ground are controlled through an energy conversion and regulation technology; the underwater magnetic induction wireless energy transmission technology is adopted to safely, reliably and covertly supply energy for the autonomous underwater vehicle. Provides powerful technical support for the underwater energy supply technology.
The above embodiments are merely illustrative of the technical concept and structural features of the present invention, and are intended to be implemented by those skilled in the art, but the present invention is not limited thereto, and any equivalent changes or modifications made according to the spirit of the present invention should fall within the scope of the present invention.
Claims (6)
1. The utility model provides a full latent formula ocean difference in temperature can energy supply system under water, carries module, power generation module, stores up the module of charging and anchor mooring orientation module including setting up at the sea below, its characterized in that: the seawater conveying module comprises a cold seawater pipeline (103), a warm seawater jet accelerating pipeline (102), a warm and cold seawater mixing pipeline (104) and a hydroelectric power conversion device (115), the power generation module adopts a closed ocean temperature difference energy power generation circulating device (101) and comprises a dividing wall type evaporator (110), an integrated turbine generator (111), a dividing wall type condenser (112), a working medium pump (113) and a pressure-resistant bin (114), the dividing wall type evaporator (110), the integrated turbine generator (111), the dividing wall type condenser (112) and the working medium pump (113) are sequentially connected to form a low-boiling-point working medium circulating loop, the dividing wall type evaporator (110), the integrated turbine generator (111), the dividing wall type condenser (112) and the working medium pump (113) are all arranged in the pressure-resistant bin (114), an inlet of the warm seawater jet accelerating pipeline (102) is arranged in surface-layer warm seawater, an outlet is connected with the dividing wall type evaporator (110), an inlet of the cold seawater pipeline (103) is arranged in the cold seawater, the cold seawater pipeline (103) adopts a double-layer heat-insulation structure and comprises a sandwich inner pipe (602) and a sandwich inner pipe (601), an outer pipe (601) and a separation outer pipe (601) are fixedly connected with a sandwich inner pipe (601), the outlet of the inner pipe (602) is connected with the dividing wall type condenser (112), the outlet of the outer pipe (601) is connected with the warm-cold seawater mixing pipeline (104), the inlet of the warm-cold seawater mixing pipeline (104) is respectively connected with the dividing wall type evaporator (110) and the dividing wall type condenser (112), the hydroelectric power conversion device (115) is arranged at the outlet of the warm-cold seawater mixing pipeline (104), warm seawater enters the dividing wall type evaporator (110) through the warm-sea water jet acceleration pipeline (102) to exchange heat with a low-boiling point working medium, cold seawater enters the dividing wall type condenser (112) through the cold seawater pipeline (103) to exchange heat with the low-boiling point working medium, the cold seawater and the warm seawater after heat exchange are mixed in the warm-cold seawater mixing pipeline (104) and then flow out, and the storage and charging module is connected with the power generation module; a warm sea water pump (107) is arranged between the warm sea water jet flow acceleration pipeline (102) and the dividing wall type evaporator (110), a cold sea water main pump (108) is arranged between the warm sea water mixing pipeline (104) and the dividing wall type condenser (112), and a cold sea water auxiliary pump (109) is arranged between the outer pipe (601) and the warm sea water mixing pipeline (104); the anchoring positioning module comprises an anchoring concrete block body (301), a mooring line (302), a sliding jacket (304) and a floater (303), the anchoring concrete block body (301) is fixed on the sea floor (502), the floater (303) floats on the upper layer of the sea surface, the power generation module and the charging storage module are respectively connected with the anchoring concrete block body (301) and the floater (303) through the mooring line (302), one end of the sliding jacket (304) is fixedly connected to the outer pipe (601), and the other end of the sliding jacket is connected with the anchoring concrete block body (301) and the floater (303) through the mooring line (302).
2. The fully submersible ocean thermal energy underwater energy supply system according to claim 1, wherein: and a filter screen (106) is arranged at the bottom inlet of the cold seawater pipeline (103).
3. The fully submersible ocean thermal energy underwater energy supply system according to claim 1, wherein: the pressure-resistant bin (114) is of a column type tumbler structure with a light upper part and a heavy lower part, and the bottoms of the pressure-resistant bin (114) and the storage and charging module are connected with a disposable load (402).
4. The fully submersible ocean thermal energy underwater energy supply system according to claim 1, wherein: the storage and charging module is connected with the power generation module through a connecting rod (401), and comprises a power storage device (201) and a wireless charging pile (202) which are connected with each other.
5. The fully submersible ocean thermal energy underwater energy supply system according to claim 4, wherein: the power storage device (201) comprises an AC/DC rectifying device, a control unit and a high-density power storage unit, the integrated turbine generator (111) is connected with the input end of the AC/DC rectifying device through a photoelectric composite cable, the photoelectric composite cable is fixed on the connecting rod, and the output end of the AC/DC rectifying device is connected with the high-density power storage unit through the control unit.
6. The fully submersible ocean thermal energy underwater energy supply system according to claim 1, wherein: and a low-boiling point substance is adopted as a circulating working medium in the low-boiling point working medium circulating loop.
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| US5513494A (en) * | 1993-12-14 | 1996-05-07 | Otec Developments | Ocean thermal energy conversion (OTEC) system |
| CN201623670U (en) * | 2009-12-18 | 2010-11-03 | 中国船舶重工集团公司第七�三研究所 | Closed ocean thermal energy conversion device |
| US8561406B2 (en) * | 2011-07-21 | 2013-10-22 | Kalex, Llc | Process and power system utilizing potential of ocean thermal energy conversion |
| CN102322751B (en) * | 2011-09-01 | 2013-09-25 | 东南大学 | Spray cooling device for cooling heat source with high heat flux |
| CN112664419B (en) * | 2021-01-28 | 2022-05-27 | 中国石油大学(华东) | Adjustable closed ocean temperature difference energy power generation system |
| CN112664418B (en) * | 2021-01-28 | 2022-07-22 | 中国石油大学(华东) | Closed ocean temperature difference energy power generation system |
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