CN114644101A - Ship gas-electric hybrid power system with electrolytic cell - Google Patents
Ship gas-electric hybrid power system with electrolytic cell Download PDFInfo
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- CN114644101A CN114644101A CN202210196415.5A CN202210196415A CN114644101A CN 114644101 A CN114644101 A CN 114644101A CN 202210196415 A CN202210196415 A CN 202210196415A CN 114644101 A CN114644101 A CN 114644101A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H21/20—Use of propulsion power plant or units on vessels the vessels being powered by combinations of different types of propulsion units
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H2021/003—Use of propulsion power plant or units on vessels the power plant using fuel cells for energy supply or accumulation, e.g. for buffering photovoltaic energy
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H21/20—Use of propulsion power plant or units on vessels the vessels being powered by combinations of different types of propulsion units
- B63H2021/202—Use of propulsion power plant or units on vessels the vessels being powered by combinations of different types of propulsion units of hybrid electric type
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- Combustion & Propulsion (AREA)
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Abstract
The invention discloses a ship gas-electricity hybrid power system with an electrolytic cell. The system comprises a natural gas engine, a first clutch, a second clutch, a gear box, a reversible motor, a power generation driver, a direct current bus, a lithium iron phosphate battery, a hydrogen fuel cell, an electrolytic cell and a natural gas storage tank, wherein the natural gas engine is used as a mechanical power system and is combined with an electric power system, so that the problems of insufficient engine power and short endurance mileage are solved. Moreover, on one hand, the invention improves the defects of slow combustion speed, low heat value and the like of the natural gas by providing hydrogen for the natural gas engine through the electrolytic cell, and on the other hand, the invention adopts a direct current networking mode, omits a distribution board and a part of transformers and greatly reduces the volume and the weight of a power system. The invention can be widely applied to the technical field of new energy.
Description
Technical Field
The invention relates to the technical field of new energy, in particular to a ship gas-electricity hybrid power system with an electrolytic cell.
Background
Compared with other fossil fuels, the natural gas has the defects of low energy density and the like, and has the advantages of minimum pollutant discharge amount in the whole life cycle of exploitation, production, storage, transportation, use and the like. Therefore, a pure electric ship power system becomes a hot point of research in recent years, and compared with a traditional fuel oil ship, the pure electric ship power system has the advantages of zero emission, simple ship type structure, higher transmission efficiency, low operation cost and the like, but has the problems of short endurance mileage and the like.
In summary, there is a need to solve the problems in the related art.
Disclosure of Invention
In order to solve the above technical problems, the present invention aims to: provides a ship gas-electric hybrid power system with an electrolytic bath.
The technical scheme adopted by the invention is as follows:
a ship gas-electricity hybrid power system with an electrolytic cell is characterized by comprising a natural gas engine, a first clutch, a second clutch, a gear box, a reversible motor, a power generation driver, a direct current bus, a lithium iron phosphate battery, a hydrogen fuel battery, the electrolytic cell and a natural gas storage tank, wherein a first input end of the natural gas engine is connected with the natural gas storage tank, an output end of the natural gas engine is connected with the gear box through the first clutch, the first output end of the gear box is connected with the reversible motor through the second clutch, the reversible motor is connected with the power generation driver, the power generation driver is connected with the direct current bus, the direct current bus is connected with the lithium iron phosphate battery, and the second input end of the natural gas engine is connected with the hydrogen fuel cell, and the hydrogen fuel cell is connected with the electrolytic cell.
Further, the system also comprises a vaporizer, wherein the input end of the vaporizer is connected with the natural gas storage tank, the output end of the vaporizer is connected with the first input end of the natural gas engine, and the vaporizer is used for vaporizing the liquefied natural gas.
Further, the system further comprises a shore power supply, wherein the output end of the shore power supply is connected with the direct-current bus through a rectifier, and the shore power supply is used for charging the lithium iron phosphate battery.
Further, the system also comprises a first direct current transformer and a second direct current transformer, wherein the direct current bus is connected with the first direct current transformer, the first direct current transformer is connected with the hydrogen fuel cell, the direct current bus is connected with the second direct current transformer, and the second direct current transformer is connected with the electrolytic cell.
Further, the system also comprises a tail gas absorption device, wherein the tail gas absorption device is arranged at the exhaust gas outlet of the natural gas engine, and the tail gas absorption device is used for treating tail gas.
Further, the system also includes a propeller connected to the second output of the gearbox.
Further, the system further comprises an energy storage converter, the direct current bus is connected with the energy storage converter, and the energy storage converter is connected with the lithium iron phosphate battery.
Further, the system also comprises a power generation driver, wherein the direct current bus is connected with the power generation driver, and the power generation driver is connected with the reversible motor.
Further, the system also comprises a hydrogen storage device, wherein a first output end of the hydrogen storage device is connected with a second input end of the natural gas engine, a second output end of the hydrogen storage device is connected with the hydrogen fuel cell, and an input end of the hydrogen storage device is connected with the electrolytic cell.
Further, the reversible electric machine includes a generator mode of operation and a motor mode of operation.
The invention has the beneficial effects that: the utility model provides a take boats and ships gas electricity hybrid power system of electrolysis trough, includes natural gas engine, first clutch, second clutch, gear box, reversible motor, power generation driver, direct current generating line, lithium iron phosphate battery, hydrogen fuel cell, electrolysis trough and natural gas storage jar, combines with electric power system through the natural gas engine as mechanical power system, has improved the power of engine, has prolonged the continuation of the journey mileage of engine. Moreover, on one hand, the invention provides hydrogen for the natural gas engine through the electrolytic bath, thereby overcoming the defects of slow combustion speed, low heat value and the like of the natural gas, and on the other hand, the invention adopts a direct current networking mode, thereby omitting a distribution board and a part of transformers and greatly reducing the volume and the weight of a power system.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description is made on the drawings of the embodiments of the present invention or the related technical solutions in the prior art, and it should be understood that the drawings in the following description are only for convenience and clarity of describing some embodiments in the technical solutions of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic connection diagram of a marine gas-electric hybrid power system with an electrolytic cell according to an embodiment of the invention.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the embodiments of the present invention, several means are one or more, a plurality of means is two or more, more than, less than, more than, etc. are understood as excluding the essential numbers, more than, less than, inner, etc. are understood as including the essential numbers, "at least one" means one or more, "at least one of the following" and the like, and any combination of these items, including any combination of a single item or plural items, is meant. If any description of "first", "second", etc. is used for the purpose of distinguishing technical features, it is not intended to indicate or imply relative importance or to implicitly indicate the number of the technical features indicated or to implicitly indicate the precedence of the technical features indicated.
It should be noted that terms such as setting, installing, connecting and the like in the embodiments of the present invention should be understood in a broad sense, and those skilled in the art can reasonably determine specific meanings of the terms in the embodiments of the present invention by combining specific contents of the technical solutions. For example, the term "coupled" may be mechanical, electrical, or may be in communication with each other; may be directly connected or indirectly connected through an intermediate.
In the description of embodiments of the present disclosure, reference to the description of the terms "one embodiment/implementation," "another embodiment/implementation," or "certain embodiments/implementations," "in the above embodiments/implementations," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least two embodiments or implementations of the present disclosure. In the present disclosure, a schematic representation of the above terms does not necessarily refer to the same exemplary embodiment or implementation. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or implementations.
It should be noted that the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Along with the rapid development of economy in China, the problems of energy demand and air pollution are increasingly concerned. Power system economics, emissions, and power plant requirements continue to increase. Generally, natural gas is used as a fuel for a ship engine, has the advantages of abundant resources, low emission pollution, low price and the like, basically has no particulate emission after combustion, generates little CO after combustion, and has the defects of low energy density and the like although the natural gas generates the least pollutant emission in the whole life cycle of exploitation, production, storage, transportation, use and the like compared with other fossil fuels. Therefore, a power system using the natural gas engine as the only power source of the ship has the defects of low energy density, slow dynamic response speed, high energy consumption and emission during low-speed operation and the like. Compared with the traditional fuel oil ship, the pure electric ship power system has the advantages of zero emission, simple ship type structure, higher transmission efficiency, low operation cost and the like, but also has the problems of poor dynamic performance, poor cruising ability and the like.
Referring to fig. 1, for this purpose, the present application provides a ship gas-electric hybrid power system with an electrolytic cell, including a natural gas engine 1, a first clutch 2a, a second clutch 2b, a gear box 3, a reversible motor 5, a power generation driver 6, a dc bus 7, a lithium iron phosphate battery 9, a hydrogen fuel cell 12, an electrolytic cell 14 and a natural gas storage tank 17, wherein a first input end of the natural gas engine 1 is connected to the natural gas storage tank 17, an output end of the natural gas engine 17 is connected to the gear box 3 through the first clutch 2a, a first output end of the gear box 3 is connected to the reversible motor 5 through the second clutch 2b, the reversible motor 5 is connected to the power generation driver 6, the power generation driver 6 is connected to the dc bus 7, the dc bus 7 is connected to the lithium iron phosphate battery 9, a second input of the natural gas engine 1 is connected to the hydrogen fuel cell 12, and the hydrogen fuel cell 12 is connected to the electrolyzer 14.
The natural gas engine is used as a mechanical power system and combined with an electric power system, and the problems of insufficient engine power and short endurance mileage are solved. Moreover, on one hand, the invention improves the defects of slow combustion speed, low heat value and the like of the natural gas by providing hydrogen for the natural gas engine through the electrolytic cell, and on the other hand, the invention adopts a direct current networking mode, omits a distribution board and a part of transformers and greatly reduces the volume and the weight of a power system.
Referring to fig. 1, as a further alternative embodiment, the power system further comprises a vaporizer 18 having an input connected to the natural gas storage tank and an output connected to a first input of the natural gas engine, the vaporizer being configured to vaporize the liquefied natural gas.
Specifically, a vaporizer 18 is provided at the natural gas storage tank 17, and when the natural gas engine 1 needs to use natural gas, a valve provided at the output end of the natural gas storage tank 17 is controlled to be opened, and liquefied natural gas is vaporized by the vaporizer 18. If lng is used directly as fuel, its too low temperature may cause the system to not work properly.
A vaporizer is a device that heats a liquid until it vaporizes (becomes a gas). In brief, the cold liquid gas is changed into gaseous gas after passing through the vaporizer. The heating can be indirect (steam heated vaporizer, hot water bath vaporizer, natural draft air bath vaporizer, forced draft vaporizer, electrically heated vaporizer, solid heat conducting vaporizer or heat transfer fluid) or direct (hot gas or submerged combustion). Generally, natural gas is prepared as liquefied natural gas for convenient storage and use. The liquefied natural gas is liquid after the natural gas is compressed and cooled to the condensation point (-161.5 ℃), and the liquefied natural gas is usually stored in a low-temperature storage tank at-161.5 ℃ and about 0.1 MPa. Thus, re-vaporising in use.
Referring to fig. 1, as a further alternative embodiment, the power system further includes a shore power source 10, an output end of the shore power source is connected with the dc bus through a rectifier, and the shore power source is used for charging the lithium iron phosphate battery.
Specifically, the shore power source 10 is connected with the direct current bus 7 through the rectifier 11, and when the ship is in shore, the shore power source 10 can charge the lithium iron phosphate battery 9 through a loop of the rectifier 11, the direct current bus 7 and the energy storage converter 8.
Shore power supplies, i.e. shore variable frequency power supplies, are also known as electronic stationary shore power supplies. The high-power variable frequency power supply device is specially designed and manufactured aiming at severe use environments such as high temperature, high humidity, high corrosivity, large load impact and the like on ships, shore docks and the like. All PCB circuit boards adopt coating curing treatment; the sine filter and the output transformer are treated by adopting integral vacuum impregnation insulating paint and spraying high-temperature protective paint, so that the sine filter and the output transformer have higher insulating grade and protective capability; completely meets the certification standard of the marine products of CCS of China classification society. The high-quality frequency-stabilizing voltage-stabilizing power supply is widely applied to occasions needing to change 50Hz industrial power into 60Hz high-quality frequency-stabilizing voltage-stabilizing power supply for ship electric equipment, ship manufacturing and repair plants, ocean drilling platforms, shore docks and the like.
Referring to fig. 1, as a further alternative embodiment, the power system further includes a first dc transformer and a second dc transformer, the dc bus is connected to the first dc transformer, the first dc transformer is connected to the hydrogen fuel cell, the dc bus is connected to the second dc transformer, and the second dc transformer is connected to the electrolyzer.
Specifically, a first dc transformer 13a is provided between the dc bus 7 and the hydrogen fuel cell 12, and a second dc transformer 13b is provided between the dc bus 7 and the electrolyzer 14. The hydrogen fuel cell 12 can obtain the electric energy on the direct current bus 7 through the first direct current transformer 13a, and the electrolyzer 14 can obtain the electric energy on the direct current bus 7 through the second direct current transformer 13 b.
There are two basic types of DC transformers, namely DC-DC converters with regulated output voltage and "DC transformers" with regulated output voltage in response to input. A dc transformer, similar to an ac transformer, converts one dc voltage into another or more dc voltages; the conversion from one DC voltage to another or multiple DC voltages in proportion is realized through high-frequency chopping, transformer isolation and high-frequency rectification, and the method can be used for occasions of power transmission, voltage detection and the like.
Referring to fig. 1, as a further alternative embodiment, the power system further includes a tail gas absorption device disposed at an exhaust gas outlet of the natural gas engine, and the tail gas absorption device is configured to treat tail gas.
Specifically, the exhaust gas treatment device is disposed at an exhaust gas outlet (not shown) of the natural gas engine, and purifies the exhaust gas generated by the natural gas engine 1. The exhaust gas treatment device purifies exhaust gas under the action of a catalyst to reduce environmental pollution. When high-temperature exhaust gas passes through a carrier coated with a catalyst made of a noble metal material, harmful substances (including CO, HC odor, DPM black smoke) in the exhaust gas chemically react under the action of the catalyst and temperature, and are converted into non-toxic H2O and CO 2.
Toxic and harmful substances and smoke dust in the waste gas can be removed by arranging the tail gas treatment device at the waste gas outlet, so that the waste gas is discharged after being treated and the atmospheric pollution is reduced.
Referring to fig. 1, as a further alternative embodiment, the power system further comprises a propeller connected to the second output of the gearbox.
Specifically, the propeller 4 is connected with the second output end of the gear box 3, and the gear box 3 is driven to move through the natural gas engine 1, so that the propeller 4 is driven to move.
Referring to fig. 1, as a further alternative embodiment, the power system further includes an energy storage converter, the dc bus is connected to the energy storage converter, and the energy storage converter is connected to the lithium iron phosphate battery.
Specifically, lithium iron phosphate battery 9 is connected with direct current bus 7 through energy storage converter 8, and energy storage converter 8 on the one hand can be with the electric energy transmission to direct current bus 7 in the lithium iron phosphate battery 9 to satisfy other consumer's power supply demand, on the other hand can be through the electric energy that acquires in direct current bus 7, charge for lithium iron phosphate battery 9.
The energy storage converter (Power Conversion System) can control the charging and discharging process of the storage battery, carry out alternating current-direct current Conversion, and can directly supply Power for alternating current loads under the condition of no Power grid. The PCS is composed of a DC/AC bidirectional converter, a control unit and the like. The PCS controller receives a background control instruction through communication, and controls the converter to charge or discharge the battery according to the symbol and the size of the power instruction, so that the active power and the reactive power of the power grid are adjusted. The PCS controller is communicated with the BMS through the CAN interface to acquire the state information of the battery pack, so that the protective charging and discharging of the battery CAN be realized, and the running safety of the battery is ensured.
Referring to fig. 1, as a further alternative embodiment, the power system further includes a power generation driver, the dc bus is connected to the power generation driver, and the power generation driver is connected to the reversible electric machine.
Referring to fig. 1, as a further alternative embodiment, the reversible electric machine includes a generator mode of operation and a motor mode of operation.
Specifically, the reversible electric machine 5 is connected to the dc bus 7 via the power generation driver 6, and the power generation driver 6 can supply the electric power in the grid to the reversible electric machine 5 in the operating mode and can also transmit the electric power generated by the reversible electric machine 5 in the generator mode to the grid.
Referring to fig. 1, as a further alternative embodiment, the power system further includes a hydrogen storage device, a first output end of the hydrogen storage device is connected with a second input end of the natural gas engine, a second output end of the hydrogen storage device is connected with the hydrogen fuel cell, and an input end of the hydrogen storage device is connected with the electrolytic cell.
Specifically, the input end of the hydrogen storage device 16 is connected to the output end of the electrolytic cell 14, and is used for buffering the hydrogen generated by the electrolytic cell 14, and when the electrolytic cell 14 starts to generate hydrogen, the valve 15a is opened, so that the hydrogen is delivered to the hydrogen storage device 16 for buffering. A first output of the hydrogen storage device 16 is connected to the natural gas engine 1, and when the natural gas engine 1 needs hydrogen, the valve 15b is opened to supply the hydrogen in the hydrogen storage device 16 to the natural gas engine 1. A second output of the hydrogen storage device 16 is connected to the hydrogen fuel cell 12, and when the hydrogen fuel cell 12 needs hydrogen, the valve 15c is opened to deliver the hydrogen in the hydrogen storage device 16 to the hydrogen fuel cell 12.
The ship gas-electric hybrid power system can realize 4 propulsion modes, and the working principle of the 4 propulsion modes is described below with reference to the attached drawings.
Referring to fig. 1, the first mode is a pure mechanical propulsion mode, in which the clutch 2a between the natural gas engine 1 and the gear box 3 is connected and disconnected, the clutch 2b between the gear box 3 and the reversible motor 5 is disconnected, the check valve 15d is opened, the liquefied natural gas in the natural gas storage tank 17 is vaporized by the vaporizer 18 and then delivered to the natural gas engine 1, the natural gas engine 1 is operated, and the propeller 4 is propelled by the natural gas engine 1 alone. The electrolysis bath 14 operates in this mode, the required electric energy can be provided by the lithium iron phosphate battery 9 through the circuit loop of the bidirectional converter 8, the direct current bus 7 and the direct current transformer 13b, or can be provided by the hydrogen fuel battery 12 through the circuit loop of the direct current transformer 13a, the direct current bus 7 and the direct current transformer 13b, hydrogen generated by water electrolysis of the electrolysis bath 14 is stored in the hydrogen storage and supply device 16 through the one-way valve 15a, hydrogen in the hydrogen storage and supply device 16 is conveyed to the natural gas engine 1 through the one-way valve 15b, and the natural gas engine 1 is subjected to hydrogen-doped combustion or conveyed to the hydrogen fuel battery 12 through the one-way valve 15 c.
The second mode is a pure electric propulsion mode, in the second mode, a clutch between the natural gas engine 1 and the gear box 3 is disconnected, a clutch 2b between the gear box 3 and the reversible motor 5 is connected, the reversible motor 5 is in a motor mode, electric energy required by the operation of the reversible motor is provided by a lithium iron phosphate battery 9 through a bidirectional converter 8, a direct current bus 7 and a power generation driver 6 or provided by a hydrogen fuel cell 12 through a direct current transformer 13a, the direct current bus 7 and the power generation driver 6, and the propeller 4 is driven by the reversible motor 5 alone. The electrolysis bath 14 operates in this mode, the required electric energy can be provided by the lithium iron phosphate battery 9 through the bidirectional converter 8, the direct current bus 7 and the direct current transformer 13b, and can also be provided by the hydrogen fuel cell 12 through the direct current transformer 13a, the direct current bus 7 and the direct current transformer 13b, the hydrogen generated by the water electrolysis of the electrolysis bath 14 is stored in the hydrogen storage and supply device 16 through the one-way valve 15a, and the hydrogen in the hydrogen storage and supply device 16 is delivered to the hydrogen fuel cell 12 through the one-way valve 15 c.
And the third mode is a hybrid propulsion mode, in the third mode, the clutch 2a between the natural gas engine 1 and the gear box 3 is connected and arranged, the clutch 2b between the gear box 3 and the reversible motor 5 is connected and arranged, the one-way valve 15d is opened, liquefied natural gas in the natural gas storage tank 17 is vaporized by the vaporizer 18 and then is conveyed to the natural gas engine 1 to enable the engine to run, and tail gas generated by the natural gas engine 1 is treated by the tail gas grading treatment device. The reversible motor 5 is in a motor mode, electric energy required by the operation of the reversible motor is provided by a lithium iron phosphate battery 9 through a bidirectional converter 8, a direct current bus 7 and a power generation driver 6 or provided by a hydrogen fuel battery 12 through a direct current transformer 13a, the direct current bus 7 and the power generation driver 6, and the propeller 4 is driven by the natural gas engine 1 and the reversible motor 5 in parallel. The electrolysis bath 14 operates in this mode, the required electric energy can be provided by the lithium iron phosphate battery 9 through the bidirectional converter 8, the direct current bus 7 and the direct current transformer 13b, or can be provided by the hydrogen fuel cell 12 through the direct current transformer 13a, the direct current bus 7 and the direct current transformer 13b, hydrogen generated by water electrolysis of the electrolysis bath 14 is stored in the hydrogen storage and supply device 16 through the one-way valve 15a, the hydrogen in the hydrogen storage and supply device 16 is conveyed to the natural gas engine 1 through the one-way valve 15b, and the natural gas engine 1 is subjected to hydrogen doping combustion or can be conveyed to the hydrogen fuel cell 12 through the one-way valve 15 c.
The fourth mode is a natural gas engine 1 propulsion auxiliary charging mode, in the fourth mode, a clutch 2a between the natural gas engine 1 and a gear box 3 is connected in a row, a clutch 2b between the gear box 3 and a reversible motor 5 is connected in a row, a one-way valve 15d is opened, liquefied natural gas in a natural gas storage tank 17 is vaporized by a vaporizer 18 and then is conveyed to the natural gas engine 1 to enable the engine to run, the reversible motor 5 is in a generator mode, the natural gas engine 1 simultaneously drives a propeller 4 and the reversible motor 5 to rotate, and electric energy generated by the reversible motor 5 charges a lithium iron phosphate battery 9 through a power generation driver 6, a direct current bus 7 and a bidirectional converter 8. The electrolysis bath 14 operates in this mode, the required electric energy can be provided by the lithium iron phosphate battery 9 through the bidirectional converter 8, the direct current bus 7 and the direct current transformer 13b, or can be provided by the hydrogen fuel cell 12 through the direct current transformer 13a, the direct current bus 7 and the direct current transformer 13b, hydrogen generated by water electrolysis of the electrolysis bath 14 is stored in the hydrogen storage and supply device 16 through the one-way valve 15a, the hydrogen in the hydrogen storage and supply device 16 is conveyed to the natural gas engine 1 through the one-way valve 15b, and the natural gas engine 1 is subjected to hydrogen doping combustion or can be conveyed to the hydrogen fuel cell 12 through the one-way valve 15 c.
It can be understood that, compared with the prior art, the embodiment of the present invention also has the following advantages:
1) according to the ship gas-electric hybrid power system with the electrolytic cell, the problems of poor dynamic response, high oil consumption and high emission in a low-speed operation interval of a pure mechanical ship power system using a natural gas engine as a unique power source can be solved by combining a mechanical power system and an electric power system, and the problems of short endurance mileage and poor dynamic performance of the pure electric ship power system can also be solved.
2) The electrolytic cell can provide hydrogen for a natural gas engine, and overcomes the defects of low combustion speed and low heat value of natural gas; compared with an alternating-current networking mode, a distribution board and a part of transformers are omitted in the direct-current networking mode, and the size and the weight of the whole system are greatly reduced.
3) The reversible motor can be in a motor mode or a generator mode through the power generation driver and the energy storage converter in the direct current networking system, and the number of the motors in the system is reduced.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If there is a description of first and second for the purpose of distinguishing technical features only, this is not to be understood as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A ship gas-electricity hybrid power system with an electrolytic cell is characterized by comprising a natural gas engine, a first clutch, a second clutch, a gear box, a reversible motor, a power generation driver, a direct current bus, a lithium iron phosphate battery, a hydrogen fuel battery, the electrolytic cell and a natural gas storage tank, wherein a first input end of the natural gas engine is connected with the natural gas storage tank, an output end of the natural gas engine is connected with the gear box through the first clutch, the first output end of the gear box is connected with the reversible motor through the second clutch, the reversible motor is connected with the power generation driver, the power generation driver is connected with the direct current bus, the direct current bus is connected with the lithium iron phosphate battery, and the second input end of the natural gas engine is connected with the hydrogen fuel cell, and the hydrogen fuel cell is connected with the electrolytic cell.
2. The marine gas-electric hybrid system with electrolyzer of claim 1, characterized in that the system further comprises a vaporizer, the input of which is connected to the natural gas storage tank and the output of which is connected to the first input of the natural gas engine, the vaporizer being adapted to vaporize the liquefied natural gas.
3. The marine gas-electric hybrid power system with electrolytic cells of claim 1, further comprising a shore power supply, wherein an output end of the shore power supply is connected with the direct current bus through a rectifier, and the shore power supply is used for charging the lithium iron phosphate battery.
4. The marine gas-electric hybrid power system with electrolyzer of claim 1, characterized in that said system further comprises a first direct current transformer and a second direct current transformer, said direct current bus is connected with said first direct current transformer, said first direct current transformer is connected with said hydrogen fuel cell, said direct current bus is connected with said second direct current transformer, said second direct current transformer is connected with said electrolyzer.
5. The marine gas-electric hybrid power system with electrolytic cell of claim 1, further comprising an exhaust gas absorption device disposed at an exhaust gas outlet of the natural gas engine, the exhaust gas absorption device being configured to process exhaust gas.
6. The marine gas-electric hybrid system with electrolyzer of claim 1 characterized in that the system further comprises a propeller connected with the second output of the gearbox.
7. The marine gas-electric hybrid power system with electrolytic cells according to claim 1, further comprising an energy storage converter, wherein the direct current bus is connected with the energy storage converter, and the energy storage converter is connected with the lithium iron phosphate battery.
8. The marine gas-electric hybrid power system with electrolytic cell of claim 1, characterized in that the system further comprises a power generation driver, the dc bus is connected with the power generation driver, and the power generation driver is connected with the reversible electric machine.
9. The marine gas-electric hybrid system with electrolyzer of claim 1, characterized in that the system further comprises a hydrogen storage device, a first output of the hydrogen storage device is connected with a second input of the natural gas engine, a second output of the hydrogen storage device is connected with the hydrogen fuel cell, and an input of the hydrogen storage device is connected with the electrolyzer.
10. The marine gas-electric hybrid power system with electrolytic cell of claim 1, characterized in that the reversible electric machine comprises a generator mode of operation and a motor mode of operation.
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