CN115371267B - Integrated energy system integrating combined cooling heating power and sea water desalination and control method thereof - Google Patents

Integrated energy system integrating combined cooling heating power and sea water desalination and control method thereof Download PDF

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Publication number
CN115371267B
CN115371267B CN202210876301.5A CN202210876301A CN115371267B CN 115371267 B CN115371267 B CN 115371267B CN 202210876301 A CN202210876301 A CN 202210876301A CN 115371267 B CN115371267 B CN 115371267B
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oxygen
pipeline
outlet
heater
gas
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CN115371267A (en
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于泽庭
梁文兴
刘文静
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Shandong University
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Shandong University
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S10/00—Solar heat collectors using working fluids
    • F24S10/30—Solar heat collectors using working fluids with means for exchanging heat between two or more working fluids
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/043—Details
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/14—Treatment of water, waste water, or sewage by heating by distillation or evaporation using solar energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
    • F01K25/08—Plants 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
    • F01K25/10—Plants 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
    • F01K25/103—Carbon dioxide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C3/00—Gas-turbine plants characterised by the use of combustion products as the working fluid
    • F02C3/20—Gas-turbine plants characterised by the use of combustion products as the working fluid using a special fuel, oxidant, or dilution fluid to generate the combustion products
    • F02C3/22—Gas-turbine plants characterised by the use of combustion products as the working fluid using a special fuel, oxidant, or dilution fluid to generate the combustion products the fuel or oxidant being gaseous at standard temperature and pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
    • 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
    • F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G6/00—Devices for producing mechanical power from solar energy
    • F03G6/06—Devices for producing mechanical power from solar energy with solar energy concentrating means
    • F03G6/065—Devices for producing mechanical power from solar energy with solar energy concentrating means having a Rankine cycle
    • F03G6/067—Binary cycle plants where the fluid from the solar collector heats the working fluid via a heat exchanger
    • 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
    • F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G6/00—Devices for producing mechanical power from solar energy
    • F03G6/06—Devices for producing mechanical power from solar energy with solar energy concentrating means
    • F03G6/068—Devices for producing mechanical power from solar energy with solar energy concentrating means having other power cycles, e.g. Stirling or transcritical, supercritical cycles; combined with other power sources, e.g. wind, gas or nuclear
    • 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
    • F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
    • F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
    • F25B15/04—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being ammonia evaporated from aqueous solution
    • 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
    • F25B27/00—Machines, plants or systems, using particular sources of energy
    • F25B27/002—Machines, plants or systems, using particular sources of energy using solar energy
    • F25B27/007—Machines, plants or systems, using particular sources of energy using solar energy in sorption type systems
    • 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
    • F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
    • F25B29/006—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the sorption type system
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
    • H01M8/04029—Heat exchange using liquids
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
    • H01M8/04059—Evaporative processes for the cooling of a fuel cell
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
    • H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
    • H01M8/04097—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with recycling of the reactants
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
    • H01M8/04201—Reactant storage and supply, e.g. means for feeding, pipes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/08—Seawater, e.g. for desalination

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Hydrology & Water Resources (AREA)
  • Organic Chemistry (AREA)
  • Water Supply & Treatment (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fuel Cell (AREA)

Abstract

The invention belongs to the technical field of energy systems, and provides a comprehensive energy system integrating combined cooling heating power and sea water desalination and a control method thereof, wherein a pipeline connected with a solar heat collector sequentially passes through a boiler, a generator and a heat exchanger to supply a supercritical carbon dioxide recompression power circulation system and an absorption refrigeration circulation system sea water desalination system; a pipeline connected with an anode inlet of the proton exchange membrane electrolytic cell in the proton exchange membrane electrolytic cell subsystem is connected with the first heat exchanger, and a pipeline connected with a rear combustion chamber outlet of the solid oxide fuel cell is connected with a boiler after passing through a gas turbine and a heater; the purpose that the energy storage requirement is provided for the proton exchange membrane electrolytic cell when solar energy is sufficient in the daytime and the like, and the proton exchange membrane electrolytic cell supplies energy for a boiler and the like when solar energy is short in the night or cloudy days and the like is achieved.

Description

Integrated energy system integrating combined cooling heating power and sea water desalination and control method thereof
Technical Field
The invention belongs to the technical field of energy systems, and particularly relates to a comprehensive energy system integrating combined cooling heating power and sea water desalination and a control method thereof.
Background
Environmental deterioration, climate change and energy crisis pose a great threat to human survival and development; in order to alleviate the above problems, the use of renewable energy sources to create an efficient, low pollution integrated energy system is considered to be an effective approach. Solar energy is considered to be a good alternative energy source due to its environment-friendly and carbon-neutral properties, and has received extensive attention from expert students in recent years.
The inventor finds that for some comprehensive energy systems using solar energy as a driving heat source, a large amount of energy can be generated in the daytime to meet the demands of users, but when the users come at night or in cloudy days, the users face the problem of energy shortage; although some comprehensive energy systems using solar energy as a core are added with some energy storage devices, the continuous and stable operation of the system can not be ensured, and the requirements of users are met.
Disclosure of Invention
In order to solve the problems, the invention provides the integrated energy system integrating the combined cooling heating power and the sea water desalination and the control method thereof, which utilize the characteristics of easy storage and uninterrupted power generation of biomass, make up the deficiency of solar energy and combine the two to realize the aims of high efficiency, low pollution and continuous operation of the energy system.
In order to achieve the above purpose, in a first aspect, the present invention provides an integrated energy system for integrated cooling, heating and power and sea water desalination, which adopts the following technical scheme:
An integrated combined cooling, heating and power and seawater desalination integrated energy system comprising:
The solar energy subsystem comprises a solar heat collector, a supercritical carbon dioxide recompression power circulation system connected with the solar heat collector through a pipeline and a boiler, an absorption refrigeration circulation system connected with the solar heat collector through a pipeline and a generator, and a sea water desalination system connected with the solar heat collector through a pipeline and a second heat exchanger; the pipeline is communicated with the outlet of the solar heat collector, sequentially passes through the boiler and the generator and then is communicated with the inlet of the first flow divider, and the two outlets of the first flow divider are respectively communicated with the inlet of the first heat exchanger and the inlet of the second heat exchanger through the pipeline; the outlet of the first heat exchanger and the outlet of the second heat exchanger are respectively communicated with the inlet of a second mixer through pipelines, and the outlet of the second mixer is communicated with the inlet of the solar heat collector through a pipeline;
A proton exchange membrane cell subsystem comprising a proton exchange membrane cell and a solid oxide fuel cell; the pipeline connected with the anode inlet of the proton exchange membrane electrolytic cell is connected with the first heat exchanger; one outlet of the proton exchange membrane electrolytic cell is connected with a hydrogen storage tank through a pipeline, and the other outlet of the proton exchange membrane electrolytic cell is connected with an oxygen storage tank through a pipeline; the pipeline connected with the outlet of the oxygen storage tank is connected with a separator after passing through an oxygen heater, a turbine and a gasification furnace; the pipeline connected with the outlet of the separator is coupled with the pipeline connected with the outlet of the hydrogen storage tank and then is communicated with the anode inlet of the substance gasification power system; and a pipeline connected with the outlet of the post combustion chamber of the solid oxide fuel cell is connected with the boiler after passing through a gas turbine and an oxygen heater.
Further, in the supercritical carbon dioxide recompression power circulation system, a gas pipeline communicated with the high-temperature heat regenerator sequentially passes through the turbine, the high-temperature heat regenerator and the low-temperature heat regenerator after passing through the boiler; the gas pipeline at the outlet of the low-temperature heat regenerator is divided into two paths, one path of the gas pipeline passes through the carbon dioxide cooler and the compressor and returns to the high-temperature heat regenerator after passing through the low-temperature heat regenerator, and the other path of the gas pipeline returns to the high-temperature heat regenerator after passing through the recompressor.
Further, in the absorption refrigeration cycle system, the liquid flow of the generator passes through the solution heat regenerator and the throttle valve and then reaches the absorber; the gas flow of the generator passes through the rectifier, condenser and evaporator before reaching the absorber.
Further, in the sea water desalination system, the second heat exchanger is arranged between the dehumidifier and the humidifier; the dehumidifier is provided with a seawater inlet.
Further, a second stop valve is arranged on a pipeline connected with the outlet of the hydrogen storage tank, and a fourth stop valve is arranged on a pipeline connected with the outlet of the oxygen storage tank.
Further, a demister, a first oxygen compressor, a first oxygen cooler, a second oxygen compressor and a second oxygen cooler are sequentially arranged between the proton exchange membrane electrolytic cell and the oxygen storage tank; the conduit of the liquid outlet of the demister is coupled to the conduit of the anode inlet of the proton exchange membrane electrolytic cell.
Further, a separator is connected behind a pipeline connected with the outlet of the oxygen storage tank through a first oxygen heater, a first oxygen turbine, a second oxygen heater, a second oxygen turbine and a gasification furnace; and a pipeline connected with the outlet of the post combustion chamber of the solid oxide fuel cell is connected with the boiler after passing through a gas turbine, the second oxygen heater and the first oxygen heater.
Further, an air compressor is connected to a pipeline connected to the cathode inlet of the solid oxide fuel cell through an air heater; a water pump is connected to a pipeline connected with the anode inlet of the solid oxide fuel cell through a water heater; the pipeline connected with the outlet of the separator is communicated with the anode inlet of the substance gasification power system after passing through the fuel compressor and the first mixer, and the pipeline connected with the outlet of the water pump is communicated with the inlet of the first mixer.
Further, a pipe connected to the outlet of the post combustor of the solid oxide fuel cell is connected to the boiler after passing through a gas turbine, a heater, an air heater and a water heater.
In order to achieve the above purpose, in a second aspect, the present invention further provides a method for controlling an integrated energy system for integrated cooling, heating and power and sea water desalination, which adopts the following technical scheme:
a control method of an integrated combined cooling heating power and sea water desalination integrated energy system, which adopts the integrated combined cooling heating power and sea water desalination integrated energy system as described in the first aspect, comprising:
when the solar energy supply is sufficient, the excessive electricity generated by the supercritical carbon dioxide recompression power circulation system is used for preparing hydrogen and oxygen and storing the hydrogen and the oxygen;
When the solar energy supply is insufficient, the second stop valve and the fourth stop valve are opened, and hydrogen is sent to the outlet of the separator to be mixed with the purified synthesis gas; the gas tank is heated by the heater and then enters the oxygen turbine to do work outwards, and oxygen is sent to the gasification furnace to be used as a gasifying agent in the gasification process after being expanded to the operating pressure of the gasification furnace; simultaneously, biomass and oxygen are contacted to generate synthesis gas; subsequently, the synthesis gas is sent to a separator, the purified synthesis gas is mixed with hydrogen and then sent to a fuel compressor, and the mixture is pressurized and then sent to a first mixer; the water is pressurized by a water pump, heated by a water heater and sent to a first mixer, and the mixed gas from the first mixer is sent to the anode of the solid oxide fuel cell; air is pressurized by an air compressor and heated by an air heater and then sent to the cathode of the solid oxide fuel cell; the solid oxide fuel cell outputs electric energy, gas is sent to a post combustion chamber for combustion, generated high-temperature and high-pressure flue gas enters a gas turbine for external acting, then the flue gas sequentially reaches a second oxygen heater, a first oxygen heater, an air heater and a water heater to heat conduction oil in a boiler, and then is discharged to the atmosphere.
Compared with the prior art, the invention has the beneficial effects that:
1. The pipeline for connecting the solar heat collector sequentially passes through the boiler, the generator and the heat exchanger, and is based on the combination supply of the supercritical carbon dioxide recompression power circulation system and the seawater desalination system of the absorption refrigeration circulation system; the pipeline communicated with the outlet of the solar heat collector is sequentially communicated with the inlet of the first flow divider after passing through the boiler and the generator, the two outlets of the flow divider are respectively communicated with the inlet of the first heat exchanger and the inlet of the second heat exchanger through pipelines, the pipeline connected with the anode inlet of the proton exchange membrane electrolytic cell in the proton exchange membrane electrolytic cell subsystem is connected with the first heat exchanger, and the pipeline connected with the outlet of the post combustion chamber of the solid oxide fuel cell is connected with the boiler after passing through the gas turbine and the heater; the purposes of providing energy storage requirements for the proton exchange membrane electrolytic cell when solar energy is sufficient in the daytime and the like and providing energy for the boiler and the like by the proton exchange membrane electrolytic cell when solar energy is short in the night or cloudy days and the like are achieved;
2. In the invention, solar energy is absorbed by a solar heat collector, and after heating conduction oil, the conduction oil drives supercritical carbon dioxide through a boiler and then compresses power circulation; then the generator provides heat for ammonia water absorption refrigeration cycle to realize refrigeration effect; the heat conduction oil is divided into two paths through a first flow divider, one path of the heat conduction oil flows into a first heat exchanger to provide hot water outwards, the other path of the heat conduction oil is sent to a sea water desalination subsystem, heat is provided for the sea water desalination subsystem through a second heat exchanger, finally the heat conduction oil coming out of the first heat exchanger and the second heat exchanger is mixed in a second mixer, and finally the heat conduction oil returns to the heat collector through a heat conduction oil pump; hot water from the first heat exchanger, one part of which is used for supplying heat to the outside, and the other part of which is mixed with water from the demister DEM and then sent to an anode PEMEC as an electrolysis raw material; when the sunlight is sufficient, the excessive electricity generated by SCRPC is used for preparing hydrogen and oxygen and storing; when the energy supply is insufficient, the stored hydrogen is used as part of fuel of the SOFC, and the synthesis gas generated by biomass gasification is used as supplementary fuel of the SOFC to be fed into the SOFC together, so that the system can continuously and stably run. In addition, when the energy supply is insufficient, the stored oxygen is heated by the flue gas from the second oxygen heater and then enters the first oxygen turbine to do work outwards, then is continuously heated by the flue gas from the gas turbine and then is sent to the second oxygen turbine to do work outwards, and finally, the oxygen is expanded to the operating pressure of the gasifier and then is sent to the gasifier to be used as a gasifying agent in the gasification process; the flue gas from the post combustion chamber sequentially passes through a second oxygen heater, a first oxygen heater, an air heater, a water heater and a boiler of the supercritical carbon dioxide recompression power cycle to release heat and then is discharged to the atmosphere; the system can realize stable and continuous operation throughout the day, and meets the actual demands of users for cold, heat, electricity and fresh water.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments and are incorporated in and constitute a part of this specification, illustrate and explain the embodiments and together with the description serve to explain the embodiments.
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
Detailed Description
The invention will be further described with reference to the drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
Example 1:
As shown in fig. 1, the present embodiment provides a comprehensive energy system integrating combined cooling heating power and sea water desalination, which includes a proton exchange membrane electrolytic cell subsystem PEMECS, a solar subsystem SHS, and a SOFC-based biomass gasification system BGSS; the proton exchange membrane electrolytic cell subsystem PEMECS comprises a proton exchange membrane electrolytic cell PEMEC, a first stop valve SV1, a hydrogen storage tank HYT, a second stop valve SV2, a demister DEM, a first oxygen compressor OC1, a second oxygen compressor OC2, a first oxygen cooler OCL1, a second oxygen cooler OCL2, a third stop valve SV3, an oxygen storage tank OX and a fourth stop valve SV4; the biomass gasification system comprises a gasification furnace GAS, a separator SEP, a fuel compressor FC, a first mixer M1, a second mixer M2, an air compressor AC, an air heater AH, a water pump WP, a water heater WH, a solid oxide fuel cell SOFC, a post-combustion chamber AB, a GAS turbine GT, a first oxygen heater OHE1, a second oxygen heater OHE2, a first oxygen turbine OT1 and a second oxygen turbine OT2; the solar subsystem SHS comprises a boiler HRVG, a carbon dioxide turbine CT, a high temperature regenerator HTR, a low temperature regenerator LTR, a carbon dioxide cooler CCL, a main compressor MC, a recompressor RC, a generator G, a rectifier REC, a condenser COND, a first throttle valve TV1, a second throttle valve TV2, an evaporator EVA, an absorber ABS, a ammonia water pump AWP, a solution regenerator SHR, a humidifier HD, a dehumidifier DH, a Fan, a second heat exchanger HE2, a water pump SWP, a solar collector SC, a first splitter SP1, a second splitter SP2, a first hot water heat exchanger HE1; wherein, the supercritical carbon dioxide recompression power cycle is SCRPC; the absorption refrigeration cycle is ARC; the seawater desalination system is DS;
The integrated combined cooling heating power and sea water desalination comprehensive energy system in the embodiment can continuously and stably run all the day, and has two running modes when the sunlight is sufficient and the sunlight is insufficient. When sunlight is sufficient, the solar subsystem (SHS), proton exchange membrane cell subsystem (PEMECS), supercritical carbon dioxide recompression cycle (SCRPC), absorption Refrigeration Cycle (ARC), and Desalination Subsystem (DS) operate. In the case of insufficient sunlight, a biomass gasification system (BGSS) based on SOFC needs to be introduced on the basis of the system. The input energy sources of the system are solar energy and biomass energy, and the output energy sources mainly comprise cold, heat and electricity energy sources and fresh water resources; the method specifically comprises the following steps:
The solar subsystem comprises a solar heat collector SC, a supercritical carbon dioxide recompression power circulation system connected with the solar heat collector SC through a pipeline and a boiler HRVG, an absorption refrigeration circulation system connected with the solar heat collector SC through a pipeline and a generator G and a sea water desalination system connected with the solar heat collector SC through a pipeline and a second heat exchanger HE 2; the pipeline communicated with the outlet of the solar heat collector SC sequentially passes through the boiler HRVG and the generator G and then is communicated with the inlet of the first flow divider SP1, and the two outlets of the first flow divider SP1 are respectively communicated with the inlet of the first heat exchanger and the inlet of the second heat exchanger HE2 through the pipeline; the outlet of the first heat exchanger and the outlet of the second heat exchanger HE2 are respectively communicated with the inlet of the second mixer M2 through pipelines, and the outlet of the second mixer M2 is communicated with the inlet of the solar heat collector through a pipeline;
A proton exchange membrane cell subsystem comprising a proton exchange membrane cell PEMEC and a solid oxide fuel cell SOFC; a pipeline connected with an anode inlet of the proton exchange membrane electrolytic cell PEMEC is connected with the first heat exchanger; one outlet of the proton exchange membrane electrolytic cell PEMEC is connected with a hydrogen storage tank HYT through a pipeline, and the other outlet is connected with an oxygen storage tank OX through a pipeline; the pipeline connected with the outlet of the oxygen storage tank OX is connected with a separator SEP after passing through an oxygen heater, a turbine and a gasification furnace; the pipeline connected with the SEP outlet of the separator is coupled with the pipeline connected with the HYT outlet of the hydrogen storage tank and then is communicated with the anode inlet of the substance gasification power system; the pipe connecting the outlet of the afterburner AB of the solid oxide fuel cell SOFC is connected to the boiler HRVG after passing through the gas turbine GT and the oxygen heater.
In this embodiment, in the supercritical carbon dioxide recompression power cycle system, a gas pipeline communicated with the high-temperature heat regenerator HTR passes through the boiler HRVG and then sequentially passes through the turbine, the high-temperature heat regenerator HTR and the low-temperature heat regenerator LTR; the gas pipeline at the outlet of the low-temperature heat regenerator LTR is divided into two paths, one path returns to the high-temperature heat regenerator HTR after passing through the carbon dioxide cooler CCL, the main compressor MC and the low-temperature heat regenerator LTR, and the other path returns to the high-temperature heat regenerator HTR after passing through the recompressor RC.
In this embodiment, in the absorption refrigeration cycle system, the liquid flow of the generator G passes through the solution regenerator SHR and the throttle valve and then reaches the absorber ABS; the gas flow of the generator G passes through the rectifier REC, the condenser COND and the evaporator EVA and then reaches the absorber ABS.
In this embodiment, in the sea water desalination system, the second heat exchanger HE2 is disposed between the dehumidifier DH and the humidifier HD; the dehumidifier DH is provided with a seawater inlet.
In this embodiment, a second stop valve SV2 is disposed on a pipeline connected to the outlet of the hydrogen tank HYT, and a fourth stop valve SV4 is disposed on a pipeline connected to the outlet of the oxygen tank OX.
In this embodiment, a demister DEM, a first oxygen compressor OC1, a first oxygen cooler OCL1, a second oxygen compressor OC2 and a second oxygen cooler OCL2 are sequentially arranged between the proton exchange membrane electrolytic cell PEMEC and the oxygen storage tank OX; the conduit of the liquid outlet of the demister DEM is coupled to the conduit of the anode inlet of the proton exchange membrane electrolytic cell PEMEC.
In this embodiment, a pipeline connected to the outlet of the oxygen storage tank OX is connected to a separator SEP through a first oxygen heater OHE1, a first oxygen turbine OT1, a second oxygen heater OHE2, a second oxygen turbine OT2 and a gasification furnace; the pipeline connected with the outlet of the post-combustion chamber AB of the SOFC is connected with the boiler HRVG after passing through the gas turbine GT, the second oxygen heater OHE2 and the first oxygen heater OHE 1.
In this embodiment, an air compressor AC is connected to a pipe connected to the cathode inlet of the SOFC, through an air heater AH; a water pump WP is connected to a pipeline connected with the anode inlet of the SOFC through a water heater WH; the pipeline connected with the outlet of the separator SEP is communicated with the anode inlet of the substance gasification power system after passing through the fuel compressor FC and the first mixer M1, and the pipeline connected with the outlet of the water pump WP is communicated with the inlet of the first mixer M1.
In this embodiment, the pipe connecting the outlet of the post combustor AB of the solid oxide fuel cell SOFC is connected to the boiler HRVG after passing through the gas turbine GT, the heater, the air heater AH and the water heater WH.
The working process or principle of the embodiment is as follows:
When the sunlight is sufficient:
when the sunlight is sufficient, solar energy is used as a driving heat source, so that the requirements of users on cold, heat, electricity and fresh water are met; it should be noted that the excess electrical energy generated by the supercritical carbon dioxide recompression power cycle (SCRPC) during the day is used to produce hydrogen and oxygen for use at night or when the energy supply is insufficient; the method comprises the following steps:
After the solar heat collector absorbs solar energy, heating the heat conduction oil, and then driving SCRPC the high-temperature heat conduction oil to generate power; then flows into an Absorption Refrigeration Cycle (ARC) to provide heat for the ARC to generate refrigeration effect; the heat conduction oil from the ARC is divided into two paths by the first splitter SP1, and one path is sent to the first heat exchanger HE1 to generate hot water; the other path is sent to a sea water desalination subsystem DS, and DS is heated by heat conduction oil through a second heat exchanger HE 2; the two paths of heat conduction oil in the pipeline 5 and the pipeline 7 are mixed through the second mixer M2, and finally returned to the solar heat collector SC through the heat conduction oil pump OP, so that one cycle is completed.
The PEMEC subsystem, the excess electrical energy produced by SCRPC during the day is used to drive PEMEC the production of hydrogen and oxygen, after which the hydrogen is sent to a hydrogen tank HYT for storage. The wet oxygen separates water and oxygen through a demister DEM, and then the water from the demister DEM is mixed with the water from the first heat exchanger HE1 and then sent to an anode of PEMEC; the oxygen is compressed to medium pressure by the first oxygen compressor OC1, flows into the first oxygen cooler OCL1 after being compressed and is cooled, then flows into the second oxygen compressor OC2 and is compressed to high pressure, and finally is cooled by the second oxygen cooler OCL2 and is sent to the oxygen tank OXT for storage.
The supercritical carbon dioxide recompression cycle (SCRPC) and the carbon dioxide CO 2 flow pipeline 10 are heated by the boiler HRVG and then enter the turbine CT to do work. The expanded CO 2 flow line 12 then releases heat through the high temperature regenerator HTR and the low temperature regenerator LTR. The carbon dioxide stream in conduit 14 is then split into two parts: a pipeline stream 14a and a carbon dioxide stream in pipeline stream 14 b. The carbon dioxide stream in conduit stream 14a is cooled by carbon dioxide cooler CCL and then sent to main compressor MC for compression and compressed fluid 16 in conduit 16 is sent to LTR heating. At the same time, the carbon dioxide stream in conduit stream 14b is compressed by the dioxygen recompressor RC, mixed with the fluid from conduit 17a in the LTR, and then flowed into the HTR to be heated, and then sent to the HRVG to be heated, completing a cycle.
An Absorption Refrigeration Cycle (ARC), wherein ammonia water is heated and evaporated in the generator G by heat conduction oil in a pipeline 1 from a boiler HRVG, and wherein the liquid flow in the pipeline 21 is cooled by a solution regenerator SHR, throttled and depressurized by a first throttle valve TV1 and then returned to an absorber ABS; the steam 24 in the line 24 is then fed to a rectifier REC for purification, in which REC the ammonia concentration is further increased, and the high purity ammonia steam 26 in the line 26 is then fed to a condenser COND for condensation, and the low purity liquid 25 in the line 25 is returned to the generator G. The condensate in the pipeline 27 is throttled and depressurized by the second throttle valve TV2 and then flows into the evaporator EVA to absorb external heat and evaporate, so that the refrigerating effect is achieved. Then, the evaporated gas in the pipe 29 flows into the ABS to be absorbed by the liquid flow from the first throttle valve TV 1. Finally, the ammonia water mixture 18 in the pipe 18 is pressurized by an ammonia water pump AWP, heated by a solution regenerator SHR and sent to the generator.
A seawater Desalination Subsystem (DS) is pumped into the duct of the dehumidifier DHD and recovers some of the heat from the humid air 35 within the duct 35. After leaving the dehumidifier, the seawater enters the second heat exchanger HE 2to be further heated. And then sent to humidifier HD where heated seawater 35 within conduit 35 is sprayed onto the structural packing. Wherein a portion of the moisture evaporates in the air and the remainder is discharged as brine at the bottom of the humidifier. The flow direction of air in the humidifier is opposite to the flow direction of seawater, and the air is heated and humidified by direct contact with the sprayed high-temperature seawater. The hot and humid air then flows into the dehumidifier where the water vapor condenses to produce fresh water, and the cool air is delivered back to the humidifier by the Fan, completing the cycle.
When the sunlight is insufficient:
When sunlight is insufficient at night or on overcast days, hydrogen stored in the sunlight is used as part of fuel of the SOFC, and synthesis gas generated by biomass gasification is used as supplementary fuel of the SOFC to be fed into the SOFC together, so that the system can continuously and stably run. At this time, the biomass gasification power system (BGSS) based on the SOFC is the core of the whole system, and BGSS operates according to the following principle:
when the system is in insufficient solar energy supply, the second stop valve SV2 and the fourth stop valve SV4 are opened, wherein hydrogen flows out from the hydrogen storage tank HYT and is sent to the outlet of the separator SEP to be mixed with purified synthesis gas; in addition, oxygen flows out from the oxygen tank OXT, is heated by the first oxygen heater OHE1, enters the first oxygen turbine OT1 to do work outwards, is continuously heated in the second oxygen heater OHE2, is sent to the second oxygen turbine OT2 to do work outwards, and is finally sent to the gasification furnace to be used as a gasifying agent in the gasification process after the oxygen is expanded to the operating pressure of the gasification furnace GAS. Simultaneously, biomass is also sent to GAS, and after the biomass contacts oxygen, a complex gasification reaction occurs, so that a large amount of synthesis GAS is generated. Subsequently, the synthesis gas is sent to the separator SEP, the impurities are removed, and the purified synthesis gas (the main components are CO, CO2, H2O and CH 4), after being mixed with hydrogen from the hydrogen tank HYT, is sent to the fuel compressor FC, is pressurized by the fuel compressor FC, and is sent to the first mixer 1M1. The water in the pipe 71 is pressurized by the water pump WP, heated by the water heater WH, and finally sent to the first mixer M1, and then the mixed gas exiting from the first mixer M1 is sent to the SOFC anode. At the same time, the air in line 68 is pressurized by air compressor AC and heated by air heater AH and sent to the SOFC cathode. Then electrochemical reaction occurs in the SOFC, electric energy is output to the outside, and then the cathode gas and the anode gas are sent to a post combustion chamber AB for combustion, so that high-temperature and high-pressure flue gas is generated. After entering the gas turbine GT to do work externally, the flue gas sequentially heats the second oxygen heater OHE2, the first oxygen heater OHE1, the air heater AH and the water heater WH, then is sent to the HRVG to heat conduction oil, and then is discharged to the atmosphere, and at the moment, the hot oil in the conduit 1 is heated by the flue gas in the pipeline 81 and then is the same as the daytime running condition.
Example 2:
A control method of an integrated combined cooling heating power and sea water desalination integrated energy system, which adopts the integrated combined cooling heating power and sea water desalination integrated energy system as described in the embodiment 1, comprising:
when the solar energy supply is sufficient, the excessive electricity generated by the supercritical carbon dioxide recompression power circulation system is used for preparing hydrogen and oxygen and storing the hydrogen and the oxygen;
When the solar energy supply is insufficient, the second stop valve SV2 and the fourth stop valve SV4 are opened, and hydrogen is sent to the SEP outlet of the separator to be mixed with the purified synthesis gas; the gas tank is heated by the heater and then enters the oxygen turbine to do work outwards, and oxygen is sent to the gasification furnace to be used as a gasifying agent in the gasification process after being expanded to the operating pressure of the gasification furnace; simultaneously, biomass and oxygen are contacted to generate synthesis gas; subsequently, the synthesis gas is sent to a separator SEP, the purified synthesis gas is mixed with hydrogen and sent to a fuel compressor FC, pressurized and sent to a first mixer M1; the water is pressurized by the water pump WP, heated by the water heater WH and sent to the first mixer M1, and the mixed gas from the first mixer M1 is sent to the SOFC anode; air is pressurized by an air compressor AC and heated by an air heater AH and then sent to a solid oxide fuel cell SOFC cathode; the SOFC outputs electric energy, gas is sent to the post combustion chamber AB for combustion, high-temperature and high-pressure flue gas is generated, enters the gas turbine GT for acting externally, then the flue gas sequentially reaches the boiler HRVG to heat conduction oil after being sequentially sent to the second oxygen heater OHE2, the first oxygen heater OHE1, the air heater and the water heater WH, and is discharged to the atmosphere.
The above description is only a preferred embodiment of the present embodiment, and is not intended to limit the present embodiment, and various modifications and variations can be made to the present embodiment by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present embodiment should be included in the protection scope of the present embodiment.

Claims (5)

1. The utility model provides an integrated cold heat and power cogeneration and sea water desalination's comprehensive energy system which characterized in that includes: the solar energy subsystem comprises a solar heat collector, a supercritical carbon dioxide recompression power circulation system connected with the solar heat collector through a pipeline and a boiler, an absorption refrigeration circulation system connected with the solar heat collector through a pipeline and a generator, and a sea water desalination system connected with the solar heat collector through a pipeline and a second heat exchanger; the pipeline is communicated with the outlet of the solar heat collector, sequentially passes through the boiler and the generator and then is communicated with the inlet of the first flow divider, and the two outlets of the first flow divider are respectively communicated with the inlet of the first heat exchanger and the inlet of the second heat exchanger through the pipeline; the outlet of the first heat exchanger and the outlet of the second heat exchanger are respectively communicated with the inlet of a second mixer through pipelines, and the outlet of the second mixer is communicated with the inlet of the solar heat collector through a pipeline; a proton exchange membrane cell subsystem comprising a proton exchange membrane cell and a solid oxide fuel cell; the pipeline connected with the anode inlet of the proton exchange membrane electrolytic cell is connected with the first heat exchanger; one outlet of the proton exchange membrane electrolytic cell is connected with a hydrogen storage tank through a pipeline, and the other outlet of the proton exchange membrane electrolytic cell is connected with an oxygen storage tank through a pipeline; the pipeline connected with the outlet of the oxygen storage tank is connected with a separator after passing through an oxygen heater, a turbine and a gasification furnace; the pipeline connected with the outlet of the separator is coupled with the pipeline connected with the outlet of the hydrogen storage tank and then is communicated with the anode inlet of the biomass gasification power system; a pipeline connected with the outlet of the rear combustion chamber of the solid oxide fuel cell, and connected with the boiler after passing through a gas turbine and an oxygen heater;
In the supercritical carbon dioxide recompression power circulation system, a gas pipeline communicated with the high-temperature heat regenerator sequentially passes through the turbine, the high-temperature heat regenerator and the low-temperature heat regenerator after passing through the boiler; the gas pipeline at the outlet of the low-temperature heat regenerator is divided into two paths, one path of the gas pipeline passes through the carbon dioxide cooler, the main compressor and the low-temperature heat regenerator and then returns to the high-temperature heat regenerator, and the other path of the gas pipeline passes through the recompression and then returns to the high-temperature heat regenerator;
In the absorption refrigeration cycle system, the liquid flow of the generator passes through a solution heat regenerator and a throttle valve and then reaches an absorber; the gas flow of the generator passes through the rectifier, the condenser and the evaporator and then reaches the absorber;
in the sea water desalination system, the second heat exchanger is arranged between the dehumidifier and the humidifier; the dehumidifier is provided with a seawater inlet;
The pipeline connected with the cathode inlet of the solid oxide fuel cell is connected with an air compressor through an air heater; a water pump is connected to a pipeline connected with the anode inlet of the solid oxide fuel cell through a water heater; the pipeline connected with the outlet of the separator is communicated with the anode inlet of the biomass gasification power system after passing through the fuel compressor and the first mixer, and the pipeline connected with the outlet of the water pump is communicated with the inlet of the first mixer;
And a pipeline connected with the outlet of the post combustion chamber of the solid oxide fuel cell is connected with the boiler after passing through a gas turbine, a heater, an air heater and a water heater.
2. The integrated cogeneration and seawater desalination integrated energy system of claim 1, wherein a second stop valve is disposed on a conduit connected to the outlet of the hydrogen storage tank and a fourth stop valve is disposed on a conduit connected to the outlet of the oxygen storage tank.
3. The integrated combined cooling, heating and power and seawater desalination integrated energy system as claimed in claim 1, wherein a demister, a first oxygen compressor, a first oxygen cooler, a second oxygen compressor and a second oxygen cooler are sequentially arranged between the proton exchange membrane electrolytic cell and the oxygen storage tank; the conduit of the liquid outlet of the demister is coupled to the conduit of the anode inlet of the proton exchange membrane electrolytic cell.
4. The integrated cogeneration and seawater desalination integrated energy system of claim 1, wherein the pipeline connected to the outlet of the oxygen storage tank is connected with a separator after passing through a first oxygen heater, a first oxygen turbine, a second oxygen heater, a second oxygen turbine and a gasification furnace; and a pipeline connected with the outlet of the post combustion chamber of the solid oxide fuel cell is connected with the boiler after passing through a gas turbine, the second oxygen heater and the first oxygen heater.
5. The control method of the integrated combined cooling heating power and seawater desalination comprehensive energy system is characterized in that the integrated combined cooling heating power and seawater desalination comprehensive energy system as claimed in any one of claims 1-4 is adopted, and the control method comprises the following steps: when the solar energy supply is sufficient, the excessive electricity generated by the supercritical carbon dioxide recompression power circulation system is used for preparing hydrogen and oxygen and storing the hydrogen and the oxygen; when the solar energy supply is insufficient, the second stop valve and the fourth stop valve are opened, and hydrogen is sent to the outlet of the separator to be mixed with the purified synthesis gas; the gas tank is heated by the heater and then enters the oxygen turbine to do work outwards, and oxygen is sent to the gasification furnace to be used as a gasifying agent in the gasification process after being expanded to the operating pressure of the gasification furnace; simultaneously, biomass and oxygen are contacted to generate synthesis gas; subsequently, the synthesis gas is sent to a separator, the purified synthesis gas is mixed with hydrogen and then sent to a fuel compressor, and the mixture is pressurized and then sent to a first mixer; the water is pressurized by a water pump, heated by a water heater and sent to a first mixer, and the mixed gas from the first mixer is sent to the anode of the solid oxide fuel cell; air is pressurized by an air compressor and heated by an air heater and then sent to the cathode of the solid oxide fuel cell; the solid oxide fuel cell outputs electric energy, gas is sent to a post combustion chamber for combustion, generated high-temperature and high-pressure flue gas enters a gas turbine for external acting, then the flue gas sequentially reaches a second oxygen heater, a first oxygen heater, an air heater and a water heater to heat conduction oil in a boiler, and then is discharged to the atmosphere.
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CN106208910A (en) * 2016-08-27 2016-12-07 温州集智科技有限公司 A kind of complementary power generation system based on ocean energy, solar energy and Hydrogen Energy
CN113937320A (en) * 2021-08-26 2022-01-14 上海空间电源研究所 Combined cooling, heating and power system and method for low-temperature proton exchange membrane fuel cell

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DE102017010897B4 (en) * 2017-11-24 2023-11-02 Vladimir Pedanov Process for thermal seawater desalination
CN114744264B (en) * 2022-04-07 2023-09-01 山东大学 Multi-combined supply system based on biomass gasification and solid oxide fuel cell

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106208910A (en) * 2016-08-27 2016-12-07 温州集智科技有限公司 A kind of complementary power generation system based on ocean energy, solar energy and Hydrogen Energy
CN113937320A (en) * 2021-08-26 2022-01-14 上海空间电源研究所 Combined cooling, heating and power system and method for low-temperature proton exchange membrane fuel cell

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