CN108625913B - Concentrating frequency division based photovoltaic photo-thermal and double-combined Rankine cycle combined cooling heating power system - Google Patents

Concentrating frequency division based photovoltaic photo-thermal and double-combined Rankine cycle combined cooling heating power system Download PDF

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Publication number
CN108625913B
CN108625913B CN201810648233.0A CN201810648233A CN108625913B CN 108625913 B CN108625913 B CN 108625913B CN 201810648233 A CN201810648233 A CN 201810648233A CN 108625913 B CN108625913 B CN 108625913B
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working medium
heat
combined
double
thermal
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CN108625913A (en
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冯永强
王春雨
王谦
韩新月
王爽
刘馨琳
陈显达
黄乾
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Jiangsu University
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Jiangsu University
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01KSTEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K23/00Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/02Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
    • F01K23/06Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
    • F01K23/10Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01KSTEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K11/00Plants characterised by the engines being structurally combined with boilers or condensers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01KSTEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K23/00Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/02Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
    • F01K23/04Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled condensation heat from one cycle heating the fluid in another cycle
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01KSTEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K23/00Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/02Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
    • F01K23/06Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
    • F01K23/065Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle the combustion taking place in an internal combustion piston engine, e.g. a diesel engine
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01KSTEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K25/00Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
    • F01K25/08Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
    • F01K25/10Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02GHOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G5/00Profiting from waste heat of combustion engines, not otherwise provided for
    • F02G5/02Profiting from waste heat of exhaust gases
    • F02G5/04Profiting from waste heat of exhaust gases in combination with other waste heat from combustion engines
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0046Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02SGENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/40Thermal components
    • H02S40/44Means to utilise heat energy, e.g. hybrid systems producing warm water and electricity at the same time
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02GHOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G2260/00Recuperating heat from exhaust gases of combustion engines and heat from cooling circuits
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0046Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
    • F24F2005/0064Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground using solar energy
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0046Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
    • F24F2005/0064Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground using solar energy
    • F24F2005/0067Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground using solar energy with photovoltaic panels
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/60Thermal-PV hybrids
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/12Improving ICE efficiencies

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

The utility model discloses a condensation frequency division photovoltaic photo-thermal and double-combined Rankine cycle combined cooling, heating and power system based on a cylinder liner water waste heat recovery subsystem, a double-combined Rankine cycle waste heat receiving and transmitting electronic system, a condensation frequency division photovoltaic photo-thermal device, a heat pump cycle heat supply/cooling subsystem, an AC/DC inverter, a controller, a DC/AC inverter and a storage battery, wherein natural gas is utilized for burning in an internal combustion engine to generate electric power, and high-temperature flue gas waste heat and high-temperature cylinder liner water waste heat generated by the internal combustion engine are recovered for generating electricity; the utility model has the advantages of high energy utilization efficiency and reasonable energy utilization mode; the system is not influenced by the regional, climate and time changes, can realize stable energy output and can realize personalized energy output according to the requirements of users; the structure is compact, and the modular installation is easy; the new energy and the traditional energy are combined, and the advantages of energy conservation, emission reduction and environmental protection are achieved.

Description

Concentrating frequency division based photovoltaic photo-thermal and double-combined Rankine cycle combined cooling heating power system
Technical Field
The utility model belongs to the technical field of cogeneration, and particularly relates to a distributed combined cooling, heating and power system based on a concentrating frequency division photovoltaic photo-thermal and double-combined Rankine cycle technology.
Background
Photovoltaic cells that have been commercially produced in the market today have a power generation efficiency of approximately 20%. The low power generation efficiency is because the photovoltaic cell only absorbs the sunlight of a specific wave band to generate electric energy, and the sunlight of other wave bands is absorbed by the photovoltaic cell to generate heat to raise the temperature of the cell. The power generation efficiency of the photovoltaic cell is reduced along with the increase of the temperature of the cell, so that the problem of low power generation efficiency of the photovoltaic cell is caused.
The concentrating and frequency-dividing photovoltaic photo-thermal technology is a new way of solar energy utilization. Sunlight is concentrated by the light condensing device, and sunlight in different wave bands is separated by a frequency division method and is utilized in a reasonable mode. Common frequency division methods are liquid absorption frequency division and thin film interferometric frequency division. The liquid absorption type frequency division adopts special liquids such as ethylene glycol, propylene glycol, nano-fluid and the like, and utilizes the characteristic that the absorption (transmittance) of sunlight in different wave bands is different, light with low absorptivity penetrates through the liquid, and the light with high absorptivity is absorbed by the liquid to generate heat so as to raise the temperature of the liquid; the thin film interference type frequency division is to periodically superimpose two or more optical thin films with different refractive indexes, so that most of solar energy in a certain wave band is transmitted through the thin film, and the rest is reflected by the thin film, thereby realizing light filtering.
The organic Rankine cycle is a novel method for recycling waste heat, and low-boiling point organic matters are adopted as a cycle working medium, so that the recycling of medium-low temperature waste heat can be realized. The organic Rankine cycle has the advantages of small equipment volume, convenient installation, wide application field and the like, and has a development prospect far higher than that of the traditional Rankine cycle.
The existing fuel gas combined cooling heating and power system generally uses high-temperature flue gas (about 500 ℃) generated by combustion of fuel gas in an internal combustion engine directly for absorption refrigeration equipment or as a heat source of heat pump circulation to realize refrigeration or heating. However, for public buildings and household buildings in cities, the heat source temperature required by the equipment is often lower than 200 ℃ to achieve the heating or refrigerating effect, and a great part of waste heat is lost in the function. In the related patent for realizing the combined heat and power supply by using the organic Rankine cycle for waste heat recovery in the prior art, high-temperature flue gas is generally directly used as a heat source to drive the organic Rankine cycle, but the performance of a cycle working medium is adversely affected due to the fact that the temperature of the heat source is too high, so that the working efficiency of a system is affected.
Disclosure of Invention
According to the defects and shortcomings of the prior art, the utility model provides a concentrating frequency division photovoltaic photo-thermal and double-combined Rankine cycle combined cooling, heating and power system, and aims to provide a system with high energy utilization efficiency and reasonable energy utilization mode; the energy output is stable without being influenced by the regional, climate and time changes, and personalized energy output can be realized according to the user requirements; the new system combining the new energy and the traditional energy is realized.
The technical scheme adopted by the utility model is as follows:
the system comprises a cylinder sleeve water waste heat recovery subsystem, a double-combined Rankine cycle waste heat recycling and receiving electronic system, a concentrating and frequency dividing photovoltaic photo-thermal device, a heat pump cycle heat supply/cold supply subsystem, an AC/DC inverter, a controller, a DC/AC inverter and a storage battery;
the cylinder liner water waste heat recovery subsystem is formed by sequentially connecting an internal combustion engine generator set, a second heat exchanger and a second working medium pump through stainless steel pipelines, so that a closed cylinder liner water circulation loop is formed, and cylinder liner water in the cylinder liner water waste heat recovery subsystem exchanges heat with working mediums in the low-temperature circulation system through the second heat exchanger; and electric power generated by an internal combustion engine generator set in the cylinder sleeve water waste heat recovery subsystem is transmitted to the AC/DC inverter through a wire.
The double-combined Rankine cycle waste heat recovery power generation subsystem comprises a high-temperature circulation system and a low-temperature circulation system; the high-temperature circulating system is formed by sequentially connecting a first heat exchanger, a first expander, a first generator, a first condenser and a first working medium pump through a stainless steel pipeline to form a closed working medium circulating loop, and circulating working medium selects water; the low-temperature circulation system is formed by sequentially connecting a second heat exchanger, a first condenser, a first flow regulating valve, a first flow meter, a second expander, a second generator, a second condenser and a third working medium pump through stainless steel pipelines to form a closed working medium circulation loop, and circulating working medium is selected from halogenated hydrocarbon such as R123 and R245fa; the high-temperature circulating system and the low-temperature circulating system are coupled through a first condenser; realizing the recovery of waste heat of the double-combined Rankine cycle; the power generated by the first generator of the high temperature circulation system and the second generator of the low temperature circulation system is transferred to the AC/DC inverter through wires.
The heat pump circulation heat supply/cold supply subsystem is formed by connecting a second flow regulating valve, a second flow meter and a third condenser in series through stainless steel pipelines to form a channel, and then is connected with the other channel formed by connecting the third flow regulating valve, the third flow meter and the absorption refrigerating unit in series through the stainless steel pipelines in parallel and then is sequentially connected with a third heat exchanger, a compressor, a motor and a fourth working medium pump through the stainless steel pipelines to form a closed working medium circulation loop, and a circulating working medium is selected from halogenated hydrocarbon such as R123.
The concentrating and frequency-dividing photovoltaic photo-thermal device consists of a photovoltaic part and a photo-thermal part. Wherein the photo-thermal part is provided with a double-layer quartz glass sleeve above a coated spectroscope, a solid frequency divider is arranged in the inner-layer quartz glass tube, and the materials of the solid frequency divider are selectedThe semiconductor microcrystalline doped glass is characterized in that an absorption liquid is filled in the inner quartz glass tube, and the absorption liquid is ethylene glycol or propylene glycol; the inner quartz glass tube is connected with a third heat exchanger in the heat pump cycle heating subsystem through a stainless steel pipeline; the photovoltaic part is characterized in that a photovoltaic cell is arranged at the bottom of the reflecting cup, and a radiating rib is arranged at the bottom of the photovoltaic cell. The photovoltaic section delivers electrical energy to the controller via the wires.
The controller transfers a part of the direct current from the AC/DC inverter and the photovoltaic part to the storage battery for storage, the other part is supplied to the direct current load, and the other part is converted into alternating current through the DC/AC inverter and is supplied to the alternating current load. The controller is also used for regulating and controlling the charge and discharge process of the storage battery, so that the storage battery is prevented from being overcharged or overdischarged, and the service life of the storage battery is prolonged.
All power transmission processes in the system are realized through wires.
The utility model has the beneficial effects that:
1. the traditional distributed combined cooling, heating and power system using fossil fuel as energy source is combined with the concentrating and frequency-dividing photovoltaic photo-thermal device using solar energy as energy source, and heating or refrigerating is realized by the solar energy when the sunlight is sufficient, so that the consumption of the fossil fuel is reduced, and further the CO is reduced 2 、SO 2 、NO x And the emission of the gas is equal, so that the purposes of energy conservation, emission reduction and environmental protection are achieved.
2. The energy utilization efficiency is high, and the energy utilization mode is reasonable: the dual-combined Rankine cycle is adopted to recycle the high-temperature flue gas waste heat and the cylinder sleeve water waste heat generated by the internal combustion engine, so that the loss of the waste heat serving as the functional force caused by directly using the high-temperature flue gas for heating or refrigerating by the traditional gas distributed cold-hot electricity three-continuous supply system is avoided, and the adverse effect on the cycle heat efficiency caused by decomposing the organic working medium caused by directly using the organic Rankine cycle for recycling the high-temperature flue gas waste heat is also avoided. The dual-combined Rankine cycle is used for recycling high-temperature flue gas waste heat, and the heat pump cycle is used for recycling solar heat, so that the cascade utilization of energy can be better realized by combining the high-temperature flue gas waste heat and the solar heat, and the energy utilization efficiency is improved.
3. The energy is not influenced by the regional, climate and time changes, and stable energy output can be realized: solar radiation intensity in different areas is different, solar energy cannot be used when the vehicle rains, snows or is in the night, at the moment, if heating or refrigerating is still needed, the fourth flow regulating valve can be opened, and part of low-temperature circulating working medium which is heated in the first condenser and is changed into gas state is introduced into the third heat exchanger, so that the low-temperature circulating working medium becomes a heat source to drive the heat pump to work in a circulating way, and the problem of unstable heat supply or refrigerating capacity caused by unstable solar energy supply is solved.
4. Personalized energy output can be realized according to the user demand: when the sunlight is sufficient, the concentrating and frequency-dividing photovoltaic photo-thermal device receives solar energy and converts the solar energy into heat energy to drive the heat pump to circulate so as to realize heating or refrigeration, and a user can adjust the second flow regulating valve and the third flow regulating valve so as to control the flow of circulating working medium flowing through the third condenser and the absorption refrigerating unit, thereby adjusting the heating capacity or the refrigerating capacity; when sunlight is insufficient, the fourth flow regulating valve is opened, the fourth flow regulating valve and the first flow regulating valve are regulated, part of high-temperature gaseous working medium in low-temperature circulation is led into the third heat exchanger through the stainless steel pipeline to serve as a heat source to drive the heat pump to circulate, and then the second flow regulating valve and the third flow regulating valve are regulated to realize the regulation of refrigerating capacity and heating capacity. In summary, the system achieves a personalized energy output whether sunny or sunny.
Drawings
Fig. 1 is a schematic diagram of the operation of the system of the present utility model when sunny.
Fig. 2 is a schematic diagram of the operation of the system of the present utility model in the event of insufficient sunlight.
Fig. 3 is a schematic structural view of a concentrated photovoltaic photo-thermal device.
Wherein 1, an internal combustion engine generator set, 2, a second heat exchanger, 3, a second working medium pump, 4, a photo-thermal part, 5, a photovoltaic part, 6, a first heat exchanger, 7, a first expander, 8, a first generator, 9, a first condenser, 10, a first working medium pump, 11, a first flowmeter, 12, a first flow regulating valve, 13, a second expander, 14, a second generator, 15, a second condenser, 16, a third working medium pump, 17, a third heat exchanger, 18, a compressor, 19, an electric motor, 20, a second flowmeter, 21, a second flow regulating valve, 22, a third condenser, 23, a third flowmeter, 24, a third flow regulating valve, 25, an absorption refrigerating unit, 26, a fourth working medium pump, 27, an AC/DC inverter, 28, a controller, 29, a DC/AC inverter, 30, a storage battery, 32, a fourth flow regulating valve, 31, a fourth flowmeter, 33, a fifth working medium pump, 34, a linear Fresnel reflector, 35, a coated spectroscope, 36, a double-layer quartz glass sleeve, 37, a solid frequency divider, 38, a reflector cup, 39, a photovoltaic cell, 40, a radiating rib, a cylinder liner water waste heat recovery subsystem, b, a high-temperature circulation system, c, a low-temperature circulation system, d, a stainless steel pipeline, e, a heat pump circulation heat supply/cold supply subsystem, f and a stainless steel pipeline.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
As shown in fig. 1, the condensation frequency division photovoltaic photo-thermal and double combined rankine cycle combined cooling, heating and power system comprises a cylinder sleeve water waste heat recovery subsystem a, a double combined rankine cycle waste heat recycling and receiving electronic system, a condensation frequency division photovoltaic photo-thermal device, a heat pump cycle heating/cooling subsystem e, an AC/DC inverter 27, a controller 28, a DC/AC inverter 29 and a storage battery 30.
The cylinder liner water waste heat recovery subsystem a is formed by sequentially connecting an internal combustion engine generator set 1, a second heat exchanger 2 and a second working medium pump 3 through stainless steel pipelines to form a closed cylinder liner water circulation loop, and cylinder liner water in the cylinder liner water waste heat recovery subsystem a exchanges heat with a low-temperature circulation system c through the second heat exchanger 2; the high-temperature flue gas generated by the internal combustion engine generator set 1 in the cylinder sleeve water waste heat recovery subsystem a is led into the first heat exchanger 6 through a stainless steel flue gas pipeline to exchange heat with the high-temperature circulating working medium; the electric power generated by the internal combustion engine generator set 1 in the cylinder liner water waste heat recovery subsystem a is transmitted to the AC/DC inverter 27 through a wire.
The double-combined Rankine cycle waste heat recovery power generation subsystem comprises a high-temperature circulation system b and a low-temperature circulation system c; the high-temperature circulating system b is formed by sequentially connecting a first heat exchanger 6, a first expander 7, a first generator 8, a first condenser 9 and a first working medium pump 10 through stainless steel pipelines to form a closed working medium circulating loop, and circulating working medium selects water; the low-temperature circulation system c is formed by sequentially connecting a second heat exchanger 2, a first condenser 9, a first flowmeter 11, a first flow regulating valve 12, a second expander 13, a second generator 14, a second condenser 15 and a third working medium pump 16 through stainless steel pipelines to form a closed working medium circulation loop, and circulating working medium is halogenated hydrocarbon, such as R123 and R245fa; the high-temperature circulation system b and the low-temperature circulation system c are coupled through the first condenser 9, so that double-combined Rankine cycle waste heat recovery is realized. The high-temperature circulation system b and the low-temperature circulation system c are respectively and coaxially connected with the first generator 8 and the second generator 14 through the first expander 7 and the second expander 13, the expander transmits mechanical work to the generators to realize power generation, and the power generated by the first generator 8 and the second generator 14 is transmitted to the AC/DC inverter 27 through wires. In this example, the first expander 7 and the second expander 13 are screw expanders or positive displacement expanders.
The heat pump circulation heat supply/cold supply subsystem e is formed by connecting a second flowmeter 20, a second flow regulating valve 21 and a third condenser 22 in series through stainless steel pipelines to form a channel, then connecting the channel with the third flowmeter 23, a third flow regulating valve 24, an absorption refrigerating unit 25 and the other channel formed by connecting the channel in series through the stainless steel pipelines in parallel, and then sequentially connecting the channel with a third heat exchanger 17, a compressor 18, a motor 19 and a fourth working medium pump 26 through the stainless steel pipelines to form a closed working medium circulation loop, wherein a circulation working medium is selected for R123; wherein the compressor 18 is a positive displacement compressor; the motor is coaxially connected with the compressor 18, the compressor 18 is driven by the motor to work, the conversion of electric energy, mechanical energy and gas internal energy is realized, and the power required by the motor can be provided by alternating current converted by the DC/AC inverter 29.
As shown in fig. 3, the concentrating and frequency-dividing photovoltaic photo-thermal device is composed of a linear fresnel reflector 34, a coated spectroscope 35, a quartz glass sleeve 36, a solid frequency divider 37, a reflecting cup 38, a photovoltaic cell 39 and a heat dissipation fin 40, wherein the coated spectroscope 35, the quartz glass sleeve 36 and the solid frequency divider 37 form a photo-thermal part of the concentrating and frequency-dividing photovoltaic photo-thermal device, and the reflecting cup 38, the photovoltaic cell 39 and the heat dissipation fin 40 form a photovoltaic part of the concentrating and frequency-dividing photovoltaic photo-thermal device. Vacuum is formed between the outer glass and the inner glass of the quartz glass sleeve 36, the inner glass tube is connected with a stainless steel pipeline d, the absorption liquid flows through the inner glass tube and is placed in a solid frequency divider 37, the absorption liquid is selected from ethylene glycol or propylene glycol, and the material of the solid frequency divider is selected fromThe semiconductor microcrystalline doped glass is manufactured.
The storage battery 30 is used for storing part of the direct current converted by the inverter, so as to ensure stable power supply requirement when power supply is insufficient; a common battery is a lead-acid battery, and supercapacitors are also contemplated.
In order to better explain the technical scheme of the utility model, the technical scheme of the utility model is further explained below in combination with the working process of the utility model:
the natural gas burns in the internal combustion engine generator set 1 and then the generated power is transmitted to the AC/DC inverter 27 through a lead, the high-temperature flue gas generated after the combustion is firstly led into the first heat exchanger 6 through a stainless steel pipeline to heat the liquid working medium water in the high-temperature circulation system b, so that the liquid working medium water is changed into a gaseous high-temperature high-pressure working medium, the gaseous high-temperature high-pressure working medium is acted by the first expander 7 to drive the first generator 8 to generate power, and the exhaust steam after the work is condensed by the first condenser 9 to become liquid and enters the first heat exchanger 6 again to exchange heat under the action of the first working medium pump 10, so that a high-temperature circulation is completed. The high Wen Gangtao water discharged by the internal combustion engine is subjected to heat exchange through the second heat exchanger 2 and is used for preheating a low-temperature circulating working medium, and then the working medium is led into the internal combustion engine generator set 1 through the second working medium pump 3 to complete a cylinder sleeve water waste heat recovery cycle. The heat released by the exhaust steam after condensation of the first condenser 9 is used for heating the liquid working medium of the low-temperature circulation system c to be in a gaseous state, the first flow regulating valve 12 is fully opened, the gaseous working medium fully enters the second expander 13 to do work to drive the second generator 14 to generate electricity, the exhaust steam after doing work is condensed by the second condenser 15 to be in a liquid state and enters the second heat exchanger 2 again to be preheated under the action of the third working medium pump 16, and therefore one low-temperature circulation c is completed; the power generated by the first generator 8 and the second generator 14 is fed through wires into an AC/DC inverter 27.
The system can be provided with a heat exchanger after the first heat exchanger 6, the low-temperature flue gas which is changed into high-temperature flue gas after heat exchange of the first heat exchanger 6 is used as a heat source to be transmitted to the heat exchanger through a stainless steel pipeline and exchanges heat with tap water, so as to provide domestic hot water, and an exhaust gas treatment device is arranged at the outlet of the heat exchanger, and the heat exchanged and the exhaust gas treated are discharged into the environment.
After sunlight is condensed by reflection of a linear Fresnel reflector, part of visible light and near infrared light (600-1100 nm) are reflected by a coated spectroscope 35 to be condensed for the second time by a reflecting cup 38, so that a photovoltaic cell 39 generates electricity, and heat generated by the photovoltaic cell 39 due to electricity generation is dissipated by a heat dissipation rib 40 at the back of the cell; the light of the residual wave band is focused on the quartz glass sleeve 36 through the coated spectroscope 35, the absorption liquid flowing through the inner tube of the quartz glass sleeve absorbs far infrared light (between 1100nm and 2500 nm), the solid frequency divider positioned on the inner tube of the quartz glass sleeve absorbs ultraviolet light and part of visible light (between 280nm and 600 nm), and the absorption liquid is heated under the combined action of the solid frequency divider and the solid frequency divider, so that the absorption liquid is used as a heat source to exchange heat with working medium in the heat pump circulation heat supply/cold supply subsystem e to drive circulation. The absorption liquid after heat exchange flows into the inner tube of the quartz glass sleeve again through the stainless steel pipeline d, and flows into the third heat exchanger 17 through the stainless steel pipeline d for heat exchange again after heating and temperature rising.
As shown in fig. 1, when sunlight is sufficient, the concentrating and frequency-dividing photovoltaic photo-thermal device installed on the roof of a building receives sunlight, part of the sunlight is absorbed by a frequency division method so as to heat absorption liquid, high-temperature absorption liquid is taken as a heat source to enter a third heat exchanger 17 through a stainless steel pipeline d to exchange heat with liquid working medium of a heat pump cycle heat supply/cold supply subsystem e, so that the liquid working medium becomes gaseous, the gaseous working medium is subjected to work by a compressor 18 to become a high-temperature and high-pressure state to enter a third condenser 22 to be condensed into liquid, and heat is released to exchange heat with indoor air so as to achieve a heating effect, or the high-temperature absorption liquid is taken as a heat source to enter an absorption refrigerating unit 25 to drive equipment so as to achieve a refrigerating effect. The condensed liquid working medium enters the third heat exchanger 17 again under the action of the fourth working medium pump 26 to complete a heat pump circulation heat/cold supply subsystem e, the user can adjust the second flow adjusting valve 21 and the third flow adjusting valve 24 to realize the adjustment of refrigerating capacity and heating capacity, and the generated redundant heat or cold can be stored by a corresponding energy storage system for other seasons, such as a cross-season underground heat storage system, an ice storage technology and the like.
The direct current generated by the AC/DC inverter 27 and the concentrated and divided photovoltaic photo-thermal device (photovoltaic section) 5 is supplied to the controller 28 through a wire.
As shown in fig. 2, when the sunlight is insufficient, the concentrating and frequency-dividing photovoltaic photo-thermal device cannot work normally; the outlet of the first condenser 9 is sequentially connected with a fourth flowmeter 31, a fourth flow regulating valve 32, a third heat exchanger 17, a fifth working medium pump 33 and the inlet end of the second condenser 15 through a stainless steel pipeline f; at this time, the fourth flow regulating valve 32 and the first flow regulating valve 12 are opened and regulated to introduce part of the working medium heated and vaporized by the low-temperature circulation system c into the third heat exchanger 17 as a heat source to drive the heat pump circulation heat supply/cold supply subsystem e to realize refrigeration and heating; the working medium after heat exchange by the third heat exchanger 17 returns to the inlet of the second condenser 15 under the action of the fifth working medium pump 33 to be mixed with the working medium in the residual low-temperature circulation system c, and then enters the second condenser 15 for condensation. The second flow regulating valve 21 and the third flow regulating valve 24 can be regulated to regulate refrigerating capacity and heating capacity, and the generated surplus heat or cold capacity can be stored by the energy storage system for other seasons.
The controller 28 stores the direct current generated from the AC/DC inverter 27 and the concentrated and divided photovoltaic/thermal device (photovoltaic part) 5, one part of the direct current is stored by the storage battery 30, and the other part of the direct current is output to the next link; a part of the direct current supplied to the next link is directly supplied to the direct current load, and the other part is converted into alternating current by the DC/AC inverter 29 to be supplied to the alternating current load.
When the generated electricity is sufficient and the load demand is not high, the system charges the storage battery 30, whereas when electricity consumption is high, the storage battery 30 releases direct current, part of the direct current is supplied to the direct current load, and part of the direct current is converted by the DC/AC inverter 29 and then supplied to the alternating current load. The regulation of the charge and discharge process of the storage battery is realized by a controller 28.
The above embodiments are merely for illustrating the design concept and features of the present utility model, and are intended to enable those skilled in the art to understand the content of the present utility model and implement the same, the scope of the present utility model is not limited to the above embodiments. Therefore, all equivalent changes or modifications according to the principles and design ideas of the present utility model are within the scope of the present utility model.

Claims (7)

1. The condensing and frequency dividing photovoltaic photo-thermal and double-combined Rankine cycle combined cooling, heating and power system is characterized by comprising a cylinder sleeve water waste heat recovery subsystem (a), a double-combined Rankine cycle waste heat recycling and receiving electronic system, a condensing and frequency dividing photovoltaic photo-thermal device, a heat pump cycle heat supply/cooling subsystem (e), an AC/DC inverter (27), a controller (28), a DC/AC inverter (29) and a storage battery (30);
the cylinder sleeve water waste heat recovery subsystem (a) is formed by connecting an internal combustion engine generator set (1), a second heat exchanger (2) and a second working medium pump (3) through a stainless steel pipeline, and the second heat exchanger (2) is coupled with a low-temperature circulation system (c); the internal combustion engine generator set (1) is connected with an AC/DC inverter (27) through a wire;
the double-combined Rankine cycle waste heat recovery power generation subsystem comprises a high-temperature circulation system (b) and a low-temperature circulation system (c); the high-temperature circulating system (b) is formed by connecting a first heat exchanger (6), a first expander (7), a first condenser (9) and a first working medium pump (10) through stainless steel pipelines; the low-temperature circulation system (c) is formed by connecting a second heat exchanger (2), a first condenser (9), a first flow regulating valve (12), a first flowmeter (11), a second expander (13), a second condenser (15) and a third working medium pump (16) through stainless steel pipelines to form a closed working medium circulation loop, and the high-temperature circulation system (b) and the low-temperature circulation system (c) are coupled through the first condenser (9); the first expander (7) is connected with the first generator (8), the second expander (13) is connected with the second generator (14), and the first generator (8) and the second generator (14) are transmitted to the AC/DC inverter (27) through wires; the outlet of the first condenser (9) is sequentially connected with a fourth flow regulating valve (32), a fourth flowmeter (31), a third heat exchanger (17), a fifth working medium pump (33) and the inlet end of the second condenser (15) through stainless steel pipelines;
the heat pump circulation heat supply/cold supply subsystem (e) is formed by connecting a second flow regulating valve (21), a second flowmeter (20) and a third condenser (22) in series through stainless steel pipelines to form a channel, then connecting the channel with the other channel formed by connecting a third flow regulating valve (24), a third flowmeter (23) and an absorption refrigerating unit (25) in series through stainless steel pipelines in parallel, then connecting the channel with a fourth working medium pump (26), a third heat exchanger (17) and a compressor (18) through stainless steel pipelines to form a closed working medium circulation loop,
the concentrating and frequency-dividing photovoltaic photo-thermal device consists of a photovoltaic part (5) and a photo-thermal part (4); the photo-thermal part (4) is connected with a third heat exchanger (17), and the photovoltaic part (5) is connected with a controller (28);
when the sunlight is sufficient, the condensing and frequency dividing photovoltaic photo-thermal device receives solar energy and converts the solar energy into heat energy to drive a heat pump circulation heat supply/cold supply subsystem (e) to realize heating or refrigeration, and a user adjusts the second flow regulating valve (21) and the third flow regulating valve (24) so as to control the circulation working medium flow flowing through the third condenser (22) and the absorption refrigerating unit, thereby adjusting the heating capacity or the refrigerating capacity; when the sunlight is insufficient, opening the fourth flow regulating valve (32) and regulating the fourth flow regulating valve (32) and the first flow regulating valve (12), introducing part of high-temperature gaseous working medium of the low-temperature circulating system (c) into the third heat exchanger (17) through a stainless steel pipeline so as to drive the heat pump circulating heat supply/cold supply subsystem (e) as a heat source, and regulating the second flow regulating valve (21) and the third flow regulating valve (24) to realize the regulation of refrigerating capacity and heating capacity;
the photo-thermal part (4) is characterized in that a double-layer quartz glass sleeve (36) is arranged above a coated spectroscope (35), a vacuum part is arranged in the middle of the double-layer quartz glass sleeve (36), a solid frequency divider (37) is arranged in an inner-layer quartz glass tube, and absorption liquid is arranged in the inner-layer quartz glass tube; the inner-layer quartz glass tube is connected with a third heat exchanger (17) through a stainless steel pipeline;
the photovoltaic part (5) is characterized in that a photovoltaic cell (39) is arranged at the bottom of the reflecting cup (38), a radiating rib (40) is arranged at the bottom of the photovoltaic cell (39), and the photovoltaic part (5) is transmitted to the controller (28) through a wire.
2. The concentrating and frequency-dividing photovoltaic photo-thermal and double-combined Rankine cycle-based combined cooling, heating and power system as claimed in claim 1, wherein the circulating working medium in the working medium circulating loop of the high-temperature circulating system (b) is water.
3. The concentrating and frequency-dividing photovoltaic photo-thermal and double-combined Rankine cycle-based combined cooling, heating and power system as claimed in claim 1, wherein the circulating working medium in the working medium circulating loop of the low-temperature circulating system (c) is halogenated hydrocarbon.
4. The concentrating and frequency-dividing photovoltaic photo-thermal and double-combined Rankine cycle-based combined cooling, heating and power system as claimed in claim 1, wherein the circulating working medium in the working medium circulating loop of the heat pump circulating heat supply/cooling subsystem (e) is halogenated hydrocarbon.
5. The concentrating and frequency-dividing photovoltaic photo-thermal and double-combined Rankine cycle-based combined cooling, heating and power system according to claim 1, wherein the absorption liquid in the inner quartz glass tube is ethylene glycol or propylene glycol.
6. The concentrating and frequency-dividing photovoltaic photo-thermal and double-combined Rankine cycle combined cooling, heating and power system according to claim 1, characterized by the choice of materials for the solid frequency divider (37)Semiconductor microcrystalline doped glass.
7. The combined cooling, heating and power system based on concentrated and divided photovoltaic and double combined rankine cycle according to claim 1, wherein the controller (28) transfers a part of the direct current from the AC/DC inverter (27) and the photovoltaic part to the storage battery (30) for storage, another part supplies the direct current load, and another part is converted into alternating current by the DC/AC inverter and supplies the alternating current load.
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