CN112260316B - Off-grid type multifunctional complementary combined cooling, heating and power and humidity system and method thereof - Google Patents
Off-grid type multifunctional complementary combined cooling, heating and power and humidity system and method thereof Download PDFInfo
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- CN112260316B CN112260316B CN202011124830.7A CN202011124830A CN112260316B CN 112260316 B CN112260316 B CN 112260316B CN 202011124830 A CN202011124830 A CN 202011124830A CN 112260316 B CN112260316 B CN 112260316B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
- F02B63/04—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G5/00—Profiting from waste heat of combustion engines, not otherwise provided for
- F02G5/02—Profiting from waste heat of exhaust gases
- F02G5/04—Profiting from waste heat of exhaust gases in combination with other waste heat from combustion engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/20—Wind motors characterised by the driven apparatus
- F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S60/00—Arrangements for storing heat collected by solar heat collectors
- F24S60/10—Arrangements for storing heat collected by solar heat collectors using latent heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J4/00—Circuit arrangements for mains or distribution networks not specified as ac or dc
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J5/00—Circuit arrangements for transfer of electric power between ac networks and dc networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/28—The renewable source being wind energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/40—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation wherein a plurality of decentralised, dispersed or local energy generation technologies are operated simultaneously
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The invention discloses an off-grid multi-energy complementary cooling, heating and power-humidity combined supply system and a method thereof. The invention utilizes the complementary advantages of solar energy, the internal combustion engine and wind energy to carry out effective energy gradient utilization on the solar energy and the waste heat of the internal combustion engine, realizes the energy supply requirement of cold, heat, electricity and humidity and has higher total energy system efficiency. And the system can operate in all weather, thereby ensuring the reliability of the system operation and simultaneously reducing the problem of environmental pollution caused by the traditional fossil energy to a certain extent.
Description
Technical Field
The invention relates to the technical field of energy, in particular to an off-grid type multi-energy complementary combined cooling, heating and power and humidity system and a method thereof.
Background
At present, energy supply under the scenes such as distant islands and ships mainly depends on an off-grid supply mode of an internal combustion engine as a prime mover due to the problems of high cost of power grid construction, operation and maintenance and the like. Meanwhile, in order to reduce the consumption of fossil fuels in the internal combustion engine and the pollution caused by the fossil fuels, the nation also advocates the development of a multi-energy complementary system which utilizes more renewable energy sources by combining abundant wind and light natural resources at sea. In an off-grid type multi-energy complementary system, as the renewable energy still has the problems of instability, randomness and the like, the renewable energy is introduced into the internal combustion engine for combined power generation, so that the stable output of the renewable energy can be realized by virtue of the advantage of the stability of the internal combustion engine, meanwhile, the purpose of expanding the power generation share of the renewable energy can be achieved, and the power supply energy consumption of the internal combustion engine is reduced.
In the current research, most researchers only consider the simple complementary power generation form of a fan, a photovoltaic and an internal combustion engine, and the cooling, heating and dehumidifying mode basically depends on electric energy conversion, so that the energy supply mode undoubtedly increases the energy consumption. Especially, the environmental conditions in coastal areas have the characteristic of high temperature and high humidity, and the traditional air conditioning system dehumidifies and cools the outside air by utilizing a condensation dehumidification mode at present. Due to the coupling processing of temperature and humidity, the humidity load of the air conditioner even accounts for more than 50% of the total load, and the consumption and waste of energy are further increased. On the other hand, the power generation efficiency of the conventional internal combustion engine is about 40%, about 62% -66% of energy is brought to the atmospheric environment by the tail gas and the cooling system, and the rest heat is not efficiently utilized, so that the problems of energy waste and heat pollution are further caused. In addition, the seaside weather changes greatly, and an off-grid multifunctional complementary system which can ensure all-weather operation and supply cold, heat and electricity humidity does not exist at present.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an off-grid multi-energy complementary cooling, heating and power-humidity combined supply system and a method thereof.
The invention discloses an off-grid multi-energy complementary combined cooling, heating and power and humidity system which is characterized by comprising a wind driven generator, an internal combustion engine cooling circulation system, a solution regeneration device, a solution dehumidification device, a seawater cooling device, an organic Rankine circulation system A, a solar heat collector, a phase change heat storage device B, an organic Rankine circulation system B, a hot water exchanger, a converter, a battery pack, a voltage compression type refrigerating device, an electric heater, an alternating current microgrid and a direct current microgrid;
the output end of the internal combustion engine is connected with a generator A, the waste gas waste heat output end of the internal combustion engine is connected with an organic Rankine cycle system A, and the organic Rankine cycle system A is connected with a generator B; the output of the generator A and the output of the generator B are connected to the alternating current microgrid; the cylinder sleeve of the internal combustion engine is connected with a cooling circulation system of the internal combustion engine; the seawater cooling device, the solution dehumidifying device and the solution regenerating device are sequentially connected, and the internal combustion engine cooling circulating system is connected with the solution regenerating device; the solution dehumidifying device is connected with the voltage compression refrigerating device, and the dehumidified air is further refrigerated and cooled by the voltage compression refrigerating device; the electric energy output end of the wind generating set is directly connected with the alternating-current microgrid; an inlet and an outlet of a circulating heat medium of the solar heat collector are respectively connected with a phase-change heat storage device B, an outlet of the phase-change heat storage device B is connected with an organic Rankine cycle system B through a right port of a three-way valve G, an upper port of the three-way valve G is connected with a solution regeneration device and is connected with a hot water exchanger through a three-way valve E; the organic Rankine cycle system B is connected with the alternating current microgrid through a generator C; the alternating-current microgrid supplies power for an electric load, and is connected with the direct-current microgrid through a converter; the direct-current micro-grid is respectively connected with the battery pack, the voltage-compression type refrigerating device and the electric heater.
As a preferred scheme of the invention, the internal combustion engine cooling circulation system comprises a thermostat, a three-way valve A, a three-way valve B, a phase change heat storage device A, a three-way valve C, a solution heat exchanger, a temperature sensor B, a three-way valve D, a three-way valve E, a radiator, a three-way valve F, a water tank and a water pump;
the thermostat is arranged on a flow channel between a cylinder liner water waste heat output end of the internal combustion engine and a three-way valve A, a lower port of the three-way valve A is connected with a three-way valve E, an upper port of the three-way valve A is connected with a three-way valve B, a right port of the three-way valve B is connected with an upper port of the three-way valve C, a lower port of the three-way valve B is connected with a phase change heat storage device A, an outlet of the phase change heat storage device A is connected with a left port of the three-way valve C, a right port of the three-way valve C is connected with a solution heat exchanger, the solution heat exchanger is connected with a dehumidification regeneration device, a temperature sensor B is arranged on the flow channel between the solution heat exchanger and the upper port of the three-way valve D, the left port of the three-way valve D is connected with the right port of the three-way valve E, and the lower port of the three-way valve F are sequentially connected with a radiator; the left port of the three-way valve E is connected with the right port of the three-way valve F, and the upper port of the three-way valve F is sequentially connected with the water tank, the water pump and the waste heat input end of the cylinder liner water of the internal combustion engine.
The invention also discloses an off-grid type multi-energy complementary combined cooling heating and power wet supply method of the system, which comprises the following steps:
when the solar energy and the wind energy are sufficient, the electricity generated by the wind driven generator is completely transmitted to the alternating-current microgrid, and the solar heat collector collects the solar energy and stores the solar energy in the phase-change heat storage device B; the alternating-current micro-grid can be directly provided for an electric load, or transmitted to the direct-current micro-grid through the converter and then stored in the battery pack, or used for supplying power for the voltage compression type refrigerating device and the electric heater;
further, when the solar energy is sufficient and the wind energy is insufficient, the wind driven generator does not work, and the internal combustion engine and the solar heat collector generate electricity and transmit the electricity to the alternating current microgrid.
Further, when the solar energy is insufficient and the wind energy is sufficient, the wind energy supplies power completely, the electric energy is transmitted to the alternating-current micro-grid, and meanwhile, the heat storage of the phase-change material heat storage device B and the internal combustion engine are used for supplying power for the alternating-current micro-grid; the internal-combustion engine directly generates electricity through a generator A and supplies power to the alternating-current micro-grid, the waste heat of cylinder sleeve water can be transmitted to the solution regeneration device through the internal-combustion engine cooling circulation system, after the solution regeneration in the dehumidification process is completed, the solution is transmitted to the solution dehumidification device to dehumidify external hot and humid air, the dehumidification process utilizes the seawater cooling device to cool, and the whole dehumidification regeneration circulation process is completed.
Further, when solar energy and wind energy are insufficient, energy is supplied by the internal combustion engine, in order to guarantee the cooling, heating and power wet requirements of users, the internal combustion engine directly generates electricity through the generator A, the cylinder sleeve water waste heat and the heat storage of the phase change heat storage device B are used for dehumidification, the waste gas waste heat of the internal combustion engine is used for generating electricity through the mechanical connection of the organic Rankine cycle system A and the generator B, the waste gas can be further stored in the phase change heat storage device B through the residual waste heat of the organic Rankine cycle system A, and then electricity is generated through the organic Rankine cycle system B and the generator C or heat is directly supplied to the hot water exchanger.
Compared with the prior art, the invention has the advantages that:
1. the invention utilizes the coupling complementary characteristics of solar energy, wind energy and an internal combustion engine and a waste heat gradient utilization technology, including waste gas waste heat of the internal combustion engine, cylinder sleeve water waste heat and solar energy waste heat, provides a corresponding energy conversion technology according to the quality of the waste heat, meets the energy utilization requirement, and simultaneously improves the energy utilization rate of the system, and the system has good social benefit, economic benefit and environmental benefit.
2. The invention can adjust the operation mode under different weather conditions, comprehensively considers the problems of the electricity storage and heat storage devices and the energy scheduling among solar energy, wind energy and internal combustion engines, can ensure all-weather operation and meet different energy requirements, and has high system automation operation degree.
3. The invention can ensure the stable and efficient power generation, refrigeration, heating and dehumidification performances, especially higher dehumidification requirements, fully utilizes the waste heat of the internal combustion engine, the waste heat of the solar energy and the heat storage device to drive the dehumidification regeneration device, and simultaneously ensures the cooling effect of the normal work of the internal combustion engine, and the system has stronger flexibility and reliability. The method is very suitable for off-grid application scenes with abundant renewable resources such as solar energy and wind energy, particularly for use on islands and ships, and can effectively meet the energy utilization requirement of the application area.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is a schematic structural diagram of an off-grid type multifunctional complementary combined cooling, heating and power-humidity system;
FIG. 2 is a schematic diagram of the system when solar energy, wind energy, or solar energy is sufficient and wind energy is insufficient;
FIG. 3 is a schematic diagram of the system when the solar energy is insufficient and the wind energy is sufficient;
FIG. 4 is a schematic diagram of the system when both solar energy and wind energy are insufficient;
fig. 5 is a schematic view of a cooling cycle system of an internal combustion engine according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions in the present invention as to the letters "a", "B", "C" …, etc. are only used to distinguish the same-named components, and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; the connection can be mechanical connection, electrical connection, physical connection or wireless communication connection; 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.
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, in an embodiment of the present invention, the off-grid type multifunctional complementary combined cooling heating and power and humidity system of the present invention mainly includes a wind power generator 1, an internal combustion engine 2, a generator A3, an internal combustion engine cooling cycle system 4, a solution regeneration device 5, a solution dehumidification device 6, a seawater cooling device 7, an organic rankine cycle system A8, a generator B9, a solar heat collector 10, a phase change heat storage device B11, a three-way valve G12, an organic rankine cycle system B13, a generator C14, a three-way valve E15, a hot water exchanger 16, an electric load 17, an inverter 18, a battery pack 19, a voltage compression and refrigeration device 20, a dc heating demand 21, an ac microgrid 22, and a dc microgrid 23,
the wind driven generator 1 is directly connected with the alternating current microgrid 22, the internal combustion engine 2 is connected with the generator A3, electricity can be directly generated and transmitted to the alternating current microgrid 22 when necessary, the waste heat of tail gas at the temperature of about 200-400 ℃ of the internal combustion engine can be recycled through the organic Rankine cycle system A8, and then electricity can be generated through the generator B9 or the waste heat can be stored in the phase-change heat storage device B11; the waste heat of the cylinder liner water in the range of about 80-100 ℃ of the internal combustion engine 2 can enter the internal combustion engine cooling circulation system 4.
The inlet and the outlet of the circulating heat medium of the solar heat collector 10 are respectively connected with a phase change heat storage device B11, the phase change heat storage device B11 receives and stores heat from the solar heat collector 10 and the organic Rankine cycle system A8, and can supply the heat to the organic Rankine cycle system B13 through a three-way valve G12 if necessary and then generate electricity through a generator C14; or directly supplies hot water by transferring heat to the hot water exchanger 16 through the three-way valve E15; the residual heat of the organic Rankine cycle system B13 can also be transferred to the hot water exchanger 16 through the three-way valve E15; the ac microgrid 22 may provide electrical energy to the electrical loads 17, or may be converted into dc power by the converter 18 and then supplied to the dc microgrid 23, and then the excess electrical energy may be stored in the battery pack 19, or may be provided to the compression refrigeration apparatus 20 and the electric heater 21.
As shown in fig. 5, in one embodiment of the present invention, the internal combustion engine cooling cycle system 4 includes a thermostat 41, a three-way valve a42, a three-way valve B43, a phase change heat storage device a44, a three-way valve C45, a solution heat exchanger 46, a temperature sensor 47, a three-way valve D48, a three-way valve E49, a radiator 410, a three-way valve F411, a water tank 412, and a water pump 413. After the cylinder liner water of the internal combustion engine enters a cooling circulation system of the internal combustion engine, different operation strategies are adopted according to the temperature of the outlet of the cylinder liner water of the internal combustion engine measured by a thermostat 41 and the change condition of the rotating speed of a water pump 413, if the temperature of the cylinder liner water exceeds 80 ℃ and the adjusting amplitude of the rotating speed exceeds 20%, the cylinder liner water sequentially passes through a three-way valve A42 and a three-way valve B43 and enters a phase-change heat storage device A44 for storing heat and slowing down the fluctuation of the water flow of the cylinder liner, and then the waste heat of the cylinder liner water is transferred to a solution heat exchanger 46 through a three-way valve C45 to assist in completing the solution regeneration process; if the temperature of the water in the cylinder sleeve exceeds 80 ℃ and the rotating speed adjustment range is within 20%, solution regeneration is completed through a three-way valve B43 and a three-way valve C45 without passing through a phase change heat storage device A44; if the temperature of the liner water is lower than 80 ℃, the liner water flows back to the internal combustion engine 2 after passing through the three-way valve a42, the three-way valve E49, the three-way valve F411, the water tank 412 and the water pump 413 in sequence. When the temperature of the outlet of the cylinder liner water is measured by a temperature sensor B47 for judgment, if the temperature exceeds 80 ℃, the fluid passes through a three-way valve D48, a radiator 410, a three-way valve F411, a water tank 412 and a water pump 413 in sequence and then returns to the internal combustion engine 2; if the temperature is lower than 80 ℃, the fluid passes through the three-way valve D48, the three-way valve E49, the three-way valve F411, the water tank 412 and the water pump 413 in sequence, the circulation is completed, and finally the fluid returns to the internal combustion engine to enter the next new circulation again.
In the invention, the solution heat exchanger 46 is used for carrying out heat convection on the waste heat of cylinder sleeve water of the internal combustion engine or the heat storage of the phase change heat storage device A44 and the solution in the solution regeneration device 5 so as to heat the solution and promote the temperature of the solution to be gradually increased, the pressure difference between air and the water vapor on the surface of the solution is increased, and the water vapor is driven by the pressure difference to migrate from the solution to the air so as to complete the solution regeneration in the dehumidification process.
The solution dehumidifying device 6 dehumidifies the external hot and humid air by using the solution in the dehumidifying and regenerating device 5.
The seawater cooling device 7 cools the solution dehumidifying device 6 by using seawater.
The heat exchanger 16 is used to supply hot water to a user.
The electric compression refrigerating device 20 is used for further refrigerating and cooling the dehumidified air, and sending the air into the room.
In this embodiment, the melting point of the phase-change material used in the phase-change heat storage device a44 is 73 ℃ to 76 ℃, and the melting point of the phase-change material used in the phase-change heat storage device B11 is 130 ℃ to 160 ℃. The organic Rankine cycle system A8 adopts high-boiling-point organic dry working medium toluene, and the organic Rankine cycle system B13 adopts low-boiling-point organic dry working medium R245 fa.
The off-grid multi-energy complementary combined cooling heating and power and humidity system can supply energy according to different weather conditions, and adopts a waste heat cascade utilization technology and the coupling complementary characteristics of solar energy, wind energy and an internal combustion engine, so that the energy utilization rate of the system is improved, meanwhile, the operation modes can be adjusted under different weather conditions, the requirements of users can be met all weather, and the automatic operation degree of the system is high.
For example, as shown in fig. 2, when the solar energy and the wind energy are sufficient, the entire amount of the electricity generated by the wind turbine generator 1 is transmitted to the ac microgrid 22, and the solar heat collector 10 collects the solar energy and stores the solar energy in the phase-change heat storage device B11. The heat of the micro-grid can be supplied to the organic Rankine cycle system B13 in different energy supply modes according to the current user demands, and the micro-grid 22 is powered by the generator C14. Its two heats can also be supplied directly to the hot water exchanger 16 through the three-way valve E15. The ac microgrid 22 may be directly provided to the electric load 17, or may be transmitted to the dc microgrid 23 through the inverter 18 and then stored in the battery pack 19, or may be used to supply power to the voltage-compression refrigeration apparatus 20 and the electric heater 21.
For example, when the solar energy is sufficient and the wind energy is insufficient, the wind power generator 1 does not operate, and the internal combustion engine 2 and the solar heat collector 10 generate power to be transmitted to the ac microgrid 22.
For example, as shown in fig. 3, when the solar energy is insufficient and the wind energy is sufficient, the wind energy is fully supplied, the electric energy is transmitted to the ac microgrid 22, and the heat storage of the phase-change material heat storage device B11 and the internal combustion engine 2 are supplied with supplementary energy. The internal combustion engine 2 directly generates electricity through the generator A3 and supplies electricity to the alternating-current microgrid 22, the waste heat of cylinder sleeve water can be transmitted to the solution regeneration device 5 through the internal combustion engine cooling circulation system 4, after the solution regeneration in the dehumidification process is completed, the solution is sent to the solution dehumidification device 6 to dehumidify external damp and hot air, the dehumidification process utilizes the seawater cooling device 7 to cool, and the whole dehumidification regeneration circulation process is completed. The waste heat of the waste gas at the temperature of about 200-400 ℃ of the internal combustion engine can be transferred to the organic Rankine cycle system A8, then the power is generated through the generator B9 and supplied to the alternating current microgrid 22, the residual heat of the waste gas can be stored in the phase change heat storage device B11 and directly supplies heat to the hot water exchanger 16 when needed, or the heat is transferred to the solution regeneration device 5 to assist in completing the solution regeneration process.
For example, as shown in fig. 4, when both solar energy and wind energy are insufficient, the system is mainly powered by an internal combustion engine to ensure the cooling, heating, power and humidity requirements of users. The internal combustion engine 2 directly generates power through the generator A3, cylinder jacket water waste heat and heat storage of the phase change heat storage device B11 are used for dehumidification, waste gas waste heat of the internal combustion engine is mechanically connected with the generator B9 through the organic Rankine cycle system A8 to generate power, the waste gas can be further stored in the phase change heat storage device B11 through the residual waste heat of the organic Rankine cycle system A8, and then power generation is performed through the organic Rankine cycle system B13 and the generator C14 or heat is directly provided for the hot water exchanger 16.
Therefore, the invention can adjust the operation mode under different weather conditions, can ensure all-weather operation and meet different energy requirements. The invention is suitable for off-grid application scenes with abundant renewable resources such as solar energy and wind energy, particularly for islands and ships, and can effectively meet the energy utilization requirement of the application area.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. An off-grid multi-energy complementary combined cooling heating and power wet supply system is characterized by comprising a wind driven generator (1), an internal combustion engine (2), an internal combustion engine cooling circulation system (4), a solution regeneration device (5), a solution dehumidification device (6), a seawater cooling device (7), an organic Rankine circulation system A (8), a solar heat collector (10), a phase change heat storage device B (11), an organic Rankine circulation system B (13), a hot water exchanger (16), an inverter (18), a battery pack (19), a voltage compression type refrigerating device (20), an electric heater (21), an alternating current microgrid (22) and a direct current microgrid (23);
the output end of the internal combustion engine (2) is connected with a generator A (3), the waste gas waste heat output end of the internal combustion engine is connected with an organic Rankine cycle system A (8), and the organic Rankine cycle system A (8) is connected with a generator B (9); the outputs of the generator A (3) and the generator B (9) are connected to the alternating current microgrid (22); the cylinder sleeve of the internal combustion engine is connected with a cooling circulation system (4) of the internal combustion engine; the seawater cooling device (7), the solution dehumidifying device (6) and the solution regenerating device (5) are sequentially connected, and the internal combustion engine cooling circulation system (4) is connected with the solution regenerating device (5); the solution dehumidifying device (6) is connected with the electric compression type refrigerating device (20), and the electric compression type refrigerating device is used for further refrigerating and cooling the dehumidified air; the electric energy output end of the wind driven generator (1) is directly connected with the alternating current microgrid (22); an inlet and an outlet of a circulating heat medium of the solar heat collector (10) are respectively connected with a phase-change heat storage device B (11), an outlet of the phase-change heat storage device B (11) is connected with an organic Rankine cycle system B (13) through a right port of a three-way valve G (12), an upper port of the three-way valve G (12) is connected with a solution regeneration device (5) and is connected with a hot water exchanger (16) through a first three-way valve E (15); the organic Rankine cycle system B (13) is connected with the alternating current microgrid (23) through a generator C (14); the alternating-current microgrid (22) supplies power to an electric load, and the alternating-current microgrid (22) is connected with the direct-current microgrid (23) through a converter (18); the direct-current micro-grid (23) is respectively connected with the battery pack (19), the voltage compression type refrigerating device (20) and the electric heater (21);
the internal combustion engine cooling circulation system (4) comprises a thermostat (41), a three-way valve A (42), a three-way valve B (43), a phase change heat storage device A (44), a three-way valve C (45), a solution heat exchanger (46), a temperature sensor B (47), a three-way valve D (48), a second three-way valve E (49), a radiator (410), a three-way valve F (411), a water tank (412) and a water pump (413);
the thermostat (41) is arranged on a flow channel between an output end of waste heat of cylinder liner water of the internal combustion engine and a three-way valve A (42), a lower port of the three-way valve A (42) is connected with a second three-way valve E (49), an upper port of the three-way valve A (42) is connected with a three-way valve B (43), a right port of the three-way valve B (43) is connected with an upper port of a three-way valve C (45), a lower port of the three-way valve B (43) is connected with a phase-change heat storage device A (44), an outlet of the phase-change heat storage device A (44) is connected with a left port of the three-way valve C (45), a right port of the three-way valve C (45) is connected with a solution heat exchanger (46), the solution heat exchanger (46) is connected with a dehumidifying and regenerating device (5), a temperature sensor B (47) is arranged on the flow channel between the upper ports of the solution heat exchanger (46) and the three-way valve D (48), the left port of the three-way valve D (48) is connected with the right port of the second three-way valve E (49), the lower port is connected with the radiator (410) and the lower port of the three-way valve F (411) in sequence; the left port of a second three-way valve E (49) is connected with the right port of a three-way valve F (411), and the upper port of the three-way valve F (411) is sequentially connected with a water tank (412), a water pump (413) and a cylinder liner water waste heat input end of the internal combustion engine (2);
the internal combustion engine cooling circulation system utilizes the waste heat of the cylinder sleeve water to regenerate and dehumidify the solution, and provides heat energy for the solution regeneration device in the solution heat exchanger; different operation strategies are adopted according to the temperature of the water outlet of the cylinder sleeve of the internal combustion engine measured by the thermostat and the rotating speed change condition of the water pump: if the temperature of the cylinder liner water exceeds 80 ℃ and the adjustment range of the rotating speed exceeds 20%, the cylinder liner water sequentially passes through a three-way valve A and a three-way valve B to enter a phase-change heat storage device A for storing heat and slowing down the fluctuation of the water flow of the cylinder liner, and then passes through a three-way valve C to transfer the waste heat of the cylinder liner water to a solution heat exchanger to assist in completing the solution regeneration process; if the temperature of the cylinder liner water exceeds 80 ℃ and the rotating speed adjustment range is within 20%, the cylinder liner water does not need to pass through the phase change heat storage device A, and the cylinder liner water passes through a three-way valve B43 and a three-way valve C45 to complete solution regeneration; if the temperature of the water in the cylinder sleeve is lower than 80 ℃, the water flows back to the internal combustion engine after passing through the three-way valve A, the second three-way valve E, the three-way valve F, the water tank and the water pump in sequence;
and (3) measuring the outlet temperature of the cylinder liner water by the fluid after the cylinder liner water completes heat exchange with the solution through a temperature sensor B, and judging: if the temperature exceeds 80 ℃, the fluid sequentially passes through the three-way valve D, the radiator, the three-way valve F, the water tank and the water pump and then returns to the internal combustion engine 2; if the temperature is lower than 80 ℃, the fluid sequentially passes through the three-way valve D, the second three-way valve E, the three-way valve F, the water tank and the water pump, completes circulation and finally returns to the internal combustion engine.
2. The off-grid type multi-energy complementary combined cooling, heating and power and humidity system as claimed in claim 1, wherein the melting point of the phase-change material used by the phase-change heat storage device A (44) is 73-76 ℃, and the melting point of the phase-change material used by the phase-change heat storage device B11 is 130-160 ℃.
3. The off-grid type multi-energy complementary combined cooling, heating and power and humidity system as claimed in claim 1, wherein the organic Rankine cycle system A (8) uses high-boiling-point organic dry working medium toluene, and the organic Rankine cycle system B (13) uses low-boiling-point organic dry working medium R245 fa.
4. An off-grid type multi-energy complementary combined cooling, heating and power and humidity method of the system of claim 1, which is characterized in that:
when the solar energy and the wind energy are sufficient, the electricity generated by the wind driven generator is completely transmitted to the alternating-current microgrid, and the solar heat collector collects the solar energy and stores the solar energy in the phase-change heat storage device B; the alternating-current micro-grid can be directly provided for an electric load, or transmitted to the direct-current micro-grid through the converter and then stored in the battery pack, or used for supplying power for the voltage compression type refrigerating device and the electric heater;
when the solar energy is sufficient and the wind energy is insufficient, the wind driven generator does not work, and the internal combustion engine and the solar heat collector generate electricity and transmit the electricity to the alternating current microgrid;
when the solar energy is insufficient and the wind energy is sufficient, the wind energy is supplied with power completely, the electric energy is transmitted to the alternating-current micro-grid, and meanwhile, the heat storage of the phase-change material heat storage device B and the internal combustion engine are used for supplying energy to the alternating-current micro-grid; the internal combustion engine directly generates power through the generator A and supplies the power to the alternating current micro-grid, the waste heat of cylinder sleeve water can be transferred to the solution regeneration device through the internal combustion engine cooling circulation system, after the solution regeneration in the dehumidification process is completed, the solution is sent to the solution dehumidification device to dehumidify external damp and hot air, the dehumidification process utilizes the seawater cooling device to cool, and the whole dehumidification regeneration circulation process is completed;
when solar energy and wind energy are insufficient, the energy is supplied by the internal combustion engine, in order to ensure the cooling, heating and power wet requirements of users, the internal combustion engine directly generates electricity through the generator A, the cylinder sleeve water waste heat and the heat storage of the phase change heat storage device B are used for dehumidification, the waste gas waste heat of the internal combustion engine is mechanically connected with the generator B through the organic Rankine cycle system A to generate electricity, the waste gas can be further stored in the phase change heat storage device B through the residual waste heat of the organic Rankine cycle system A, and then the organic Rankine cycle system B and the generator C are used for generating electricity or directly providing heat for the hot water exchanger.
5. The off-grid type multi-energy complementary combined cooling, heating and power and humidity method as claimed in claim 4, wherein: waste heat of exhaust gas of the internal combustion engine is transferred to the organic Rankine cycle system A, then the generator B is used for generating electricity to be supplied to the alternating current microgrid, and residual heat of the exhaust gas can be stored in the phase-change heat storage device B.
6. The off-grid type multi-energy complementary combined cooling heating and power and humidity method as claimed in claim 4 or 5, wherein the internal combustion engine generates waste heat of 200-400 ℃ to generate electricity through the organic Rankine cycle system A; the internal combustion engine generates the waste heat of cylinder liner water at the temperature of 80-100 ℃, the waste heat enters a cooling circulation system of the internal combustion engine to realize the function of solution regeneration in dehumidification, and then the solution dehumidification is carried out.
7. The off-grid type multi-energy complementary combined cooling heating and power and humidity supply method as claimed in claim 4 or 5, wherein the solar waste heat in the solar heat collector enters the phase-change heat storage device B for heat storage, and the heat storage is utilized differently according to the environmental conditions and the actual requirements, and the method comprises the steps of generating electricity through the organic Rankine cycle system B, regenerating solution in the solution regeneration device or directly supplying heat through the hot water exchanger.
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| CN114872873B (en) * | 2022-06-10 | 2023-05-30 | 浙江大学 | Marine zero-carbon-emission energy system combining solution dehumidifying air conditioner and sea water desalination technology and working method thereof |
| CN117614147A (en) * | 2023-11-23 | 2024-02-27 | 中节能风力发电股份有限公司 | Centralized energy storage power station cooling system |
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