CN112049702B - Combined cooling heating and power system with energy storage device based on waste heat utilization of gas internal combustion engine - Google Patents
Combined cooling heating and power system with energy storage device based on waste heat utilization of gas internal combustion engine Download PDFInfo
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- CN112049702B CN112049702B CN202010679768.1A CN202010679768A CN112049702B CN 112049702 B CN112049702 B CN 112049702B CN 202010679768 A CN202010679768 A CN 202010679768A CN 112049702 B CN112049702 B CN 112049702B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting from exhaust energy
- F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting from exhaust energy the devices using heat
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- 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
- F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting from exhaust energy
- F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting from exhaust energy the devices using heat
- F01N5/025—Exhaust or silencing apparatus combined or associated with devices profiting from exhaust energy the devices using heat the device being thermoelectric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- 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
- F25B15/06—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being water vapour evaporated from a salt solution, e.g. lithium bromide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The invention discloses a cold, heat and electricity triple supply system with an energy storage device based on waste heat utilization of a gas internal combustion engine, belonging to the technical field of cold, heat and electricity cogeneration and waste heat utilization, and comprising an internal combustion engine exhaust system, an internal combustion engine cylinder sleeve water cooling system, a high-temperature smoke gas driven lithium bromide solution system, a low-pressure lithium bromide solution system, a low-temperature water driven lithium bromide solution system, an absorption type lithium bromide unit cooling water system, a chilled water and cold storage system and a hot water and heat storage system; the invention realizes the direct and sufficient coupling of the internal combustion engine, the double-effect lithium bromide absorption refrigerator and the hot water heat exchanger, aims to fully utilize the heat extraction of the internal combustion engine, can meet different cold and heat load requirements according to the change of external temperature conditions, simultaneously is provided with the corresponding cold and heat storage devices, realizes the efficient matching and stable operation of the system, and improves the stability of the comprehensive energy utilization rate.
Description
Technical Field
The invention relates to natural gas distributed multiple energy supply and comprehensive energy efficient utilization, in particular to the technical field of combined cooling, heating and power and waste heat utilization.
Background
The distributed energy supply system of the gas internal combustion engine utilizes natural gas as fuel, the internal combustion engine expands to do work and drives the generator to generate electricity, waste heat utilization equipment such as a lithium bromide absorption refrigerator and a hot water heat exchanger is combined to utilize waste heat, heat load and cold load are provided for users, combined cooling heating and power is realized, energy is utilized in a gradient manner, energy consumption is low, configuration is flexible, system economy is good, and energy utilization efficiency can reach more than 70%.
The waste heat of the flue gas generated by the power generation of the internal combustion engine and the water cooled by the cylinder sleeve have a large amount of waste heat, and corresponding waste heat utilization equipment is configured for refrigerating and heating supply, so that the comprehensive utilization of cold, heat and electricity is realized, on one hand, the multi-energy supply of the comprehensive energy system is realized, and on the other hand, the comprehensive energy supply efficiency of the distributed energy system is improved by combining and utilizing the energy cascade utilization principle. However, when the cooling, heating and power triple supply system of the internal combustion engine runs, load distribution is not uniform due to time intervals of cooling and heating loads, especially when load curve deviation is large, the running of the internal combustion engine is not matched with the cooling and heating running, and the problems of low comprehensive energy utilization rate of the system, poor system economy and the like occur.
Disclosure of Invention
In view of the characteristics of high exhaust temperature and high cylinder liner water temperature of the internal combustion engine of a gas distributed system, when the internal combustion engine works, about 40 percent of fuel combustion releasing capacity is converted into useful work of the internal combustion engine, and the rest large part of energy is lost in a waste gas and heat dissipation mode. Aiming at the phenomenon of insufficient energy utilization of an internal combustion engine, the invention provides a combined cooling heating and power system with an energy storage device based on the waste heat utilization of a gas internal combustion engine based on the energy cascade utilization principle, so that the direct and sufficient coupling of the internal combustion engine, a double-effect lithium bromide absorption refrigerator and a hot water heat exchanger is realized, the heat extraction of the internal combustion engine is fully utilized, the functions of flue gas driving, cylinder liner water driving and mixed driving of an absorption refrigeration unit can be realized according to different surrounding load requirements, the requirements of different energy products are further met, and the comprehensive energy utilization rate is more efficient. Meanwhile, corresponding heat storage and cold storage devices are arranged, the problem that the operation between the internal combustion engine and the refrigerating and heating device is not matched is solved, the independent operation of a cooling and heating system is realized, the high-load operation of the internal combustion engine is met, and the comprehensive energy utilization rate, the stability and the anti-interference capability of the system are greatly improved.
The technical scheme adopted by the invention for solving the problems is as follows: a combined cooling heating and power system with an energy storage device based on waste heat utilization of a gas internal combustion engine is characterized by comprising an internal combustion engine exhaust system, an internal combustion engine cylinder sleeve water cooling system, a high-temperature flue gas driven lithium bromide solution system, a low-pressure lithium bromide solution system, a low-temperature water driven lithium bromide solution system, an absorption type lithium bromide unit cooling water system, a chilled water and cold storage system and a hot water and heat storage system;
the internal combustion engine exhaust system comprises a gas internal combustion engine, a first control valve, a smoke hot water heat exchanger, a smoke generator and a first mixer, wherein the first mixer is connected with the smoke generator and the smoke hot water heat exchanger;
the cylinder liner water cooling system of the internal combustion engine comprises a gas internal combustion engine, a second control valve, a cylinder liner water generator, a second mixer and a cylinder liner water-heat water heat exchanger, wherein the second control valve is connected with the gas internal combustion engine, the cylinder liner water generator and the cylinder liner water-heat water heat exchanger, the second control valve controls the flow rate of cylinder liner water of the gas internal combustion engine entering the cylinder liner water generator and the cylinder liner water-heat water heat exchanger, and meanwhile, the cylinder liner water-heat water heat exchanger is used as a cooling bypass of the cylinder liner water cooling system of the internal combustion engine to prevent the cylinder liner water temperature from being too high when the flow rate of the cylinder liner water generator is too low;
the cooling water system of the absorption lithium bromide unit comprises an absorber, a condenser and a cooling water air cooling tower, wherein a cooling water outlet of the cooling water air cooling tower, the absorber, the condenser and a cooling water inlet of the cooling water air cooling tower are sequentially connected, and cooling water enters the absorber from the cooling water air cooling tower, enters the condenser and finally flows back to the cooling water air cooling tower to complete cooling water circulation;
the chilled water and cold accumulation system comprises an evaporator, a cold accumulation device and a cold user, wherein an outlet of the evaporator, the cold accumulation device, the cold user and an inlet of the evaporator are sequentially connected; the cold accumulation device realizes cold energy storage, and realizes night cold accumulation and releases and fully utilizes cold energy in the daytime when the cold load is large in summer and small in night cold load;
the hot water supply and heat storage system comprises a cylinder sleeve hydrothermal water heat exchanger, a flue gas hydrothermal water heat exchanger, a heat storage device and a hot user, wherein a water outlet of the cylinder sleeve hydrothermal water heat exchanger is connected with a water inlet of the heat storage device, a water outlet of the heat storage device is connected with an input end of the hot user, an output end of the hot user is connected with water inlets of the cylinder sleeve hydrothermal water heat exchanger and the flue gas hydrothermal water heat exchanger, and a water outlet of the flue gas hydrothermal water heat exchanger is connected with a water inlet of the heat storage device; the heat storage device realizes the storage of the heat load, and realizes the adjustment of the heat load when the heat load is not matched due to time intervals in winter;
the high-temperature flue gas driven lithium bromide solution system comprises a gas internal combustion engine, a flue gas generator, a low-pressure generator, a fifth mixer, a sixth mixer, a condenser, an evaporator, an absorber, a working medium pump, a low-pressure heat exchanger, a third control valve and a high-pressure heat exchanger; the gas internal combustion engine, the smoke generator, the low-pressure generator, the mixer I, the mixer II, the condenser, the throttle valve, the evaporator, the absorber, the working medium pump, the low-pressure heat exchanger, the control valve III, the high-pressure heat exchanger and the smoke generator are sequentially connected; high-temperature exhaust gas of the gas internal combustion engine enters the smoke generator as a heat source, so that lithium bromide solution in the smoke generator is evaporated and concentrated, high-temperature water vapor is evaporated and escaped out of the smoke generator, partial sensible heat is released by the low-pressure generator and flows into a condenser through a fifth mixer and a sixth mixer, low-temperature water becomes low-temperature water through a throttle valve and then enters the evaporator to release cold energy to chilled water, the low-temperature water is evaporated and gasified into low-temperature steam which enters an absorber and is absorbed by the concentrated lithium bromide solution, and diluted dilute lithium bromide aqueous solution is pressurized by a working medium pump, is heated by a low-pressure heat exchanger, a third control valve and a high-pressure heat exchanger and then flows into the smoke generator to be continuously circulated;
the low-pressure lithium bromide solution system comprises a fourth control valve, a low-pressure generator, a sixth mixer, a condenser, an evaporator, an absorber and a low-pressure heat exchanger; the fourth control valve, the low-pressure generator, the sixth mixer, the condenser, the evaporator and the absorber are sequentially connected, the smoke generator is connected with the low-pressure generator, and the low-pressure generator, the fourth mixer, the low-pressure heat exchanger and the absorber are sequentially connected; the dilute lithium bromide solution flowing out of the fourth control valve enters a low-pressure generator, steam is evaporated and concentrated under the drive of high-temperature steam from a smoke generator, and the steam becomes the dilute lithium bromide solution again after sequentially passing through a sixth mixer, a condenser, an evaporator and an absorber; concentrated lithium bromide solution in the low-pressure generator passes through a fourth mixer, enters a low-pressure heat exchanger for heat exchange, and then enters an absorber;
the low-temperature water-driven lithium bromide solution system comprises a third control valve, a high-pressure heat exchanger, a third mixer, a fourth control valve, a cylinder sleeve water generator, a fifth mixer, a sixth mixer, a condenser, an evaporator, an absorber and a low-pressure heat exchanger; the third control valve and the high-pressure heat exchanger are connected with a third mixer, the third mixer is connected with a fourth control valve, the cylinder sleeve water generator, the fifth mixer, the sixth mixer, the condenser, the evaporator and the absorber are sequentially connected, and the cylinder sleeve water generator, the fourth mixer, the low-pressure heat exchanger and the absorber are sequentially connected; the dilute lithium bromide solution flowing out of the fourth control valve enters a cylinder liner water generator, the dilute lithium bromide solution is evaporated and concentrated under the drive of high-temperature cylinder liner water, and the steam passes through a fifth mixer, a sixth mixer, a condenser, an evaporator and an absorber in sequence to become the dilute lithium bromide solution again; concentrated lithium bromide solution in the cylinder liner water generator enters a low-pressure heat exchanger for heat exchange after passing through a mixer II and then enters an absorber.
Furthermore, the first control valve controls the high-temperature exhaust flow entering the smoke generator and the smoke hot water heat exchanger, and plays a role in adjusting cooling and heating loads; the second control valve controls the water flow of the cylinder sleeve entering the cylinder sleeve water generator and the cylinder sleeve water-heat water heat exchanger, and the cold and hot load bidirectional adjustment is realized according to different seasons and different external load requirements.
Furthermore, the third control valve and the fourth control valve control the flow of dilute lithium bromide solution entering the smoke generator, the cylinder sleeve water generator and the low-pressure generator, so that the working conditions of single operation of exhaust heat source drive, single operation of pure cylinder sleeve water heat source drive and mixed drive operation of the double-effect absorption lithium bromide unit are realized.
Compared with the prior art, the invention has the following advantages and effects:
(1) the invention realizes the coupling of the gas internal combustion engine system, the absorption refrigeration system, the heating system and the cold and heat accumulation device.
(2) The invention realizes a multi-working condition operation mode of single operation of exhaust heat source drive, single operation of pure cylinder sleeve water heat source drive and mixed drive operation of the double-effect absorption type lithium bromide unit.
(3) The invention has black start, grid-connected operation and off-grid operation modes.
(4) The invention realizes the variable working condition operation of the refrigerating and heating equipment based on the external cold and hot load change condition, the refrigerating and heating system can also operate simultaneously (hot water can be provided in summer), and the invention combines the energy cascade utilization principle to realize the high-efficiency utilization of the waste heat of the internal combustion engine system, the stable operation of the internal combustion engine and the great improvement of the comprehensive energy utilization efficiency.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the system according to the embodiment of the present invention.
In the figure: the system comprises a gas internal combustion engine 1, a smoke generator 2, a low-pressure generator 3, a cylinder sleeve water generator 4, a condenser 5, an evaporator 6, an absorber 7, a working medium pump 8, a low-pressure heat exchanger 9, a high-pressure heat exchanger 10, a cylinder sleeve water-heat water heat exchanger 11, a cooling water air cooling tower 12, a throttle valve 13, a heat storage device 14, a heat user 15, a cold storage device 16, a cold user 17, a smoke water-heat exchanger 18, a first control valve K1, a second control valve K2, a third control valve K3, a fourth control valve K4, a first mixer M1, a second mixer M2, a third mixer M3, a fourth mixer M4, a fifth mixer M5 and a sixth mixer M6.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Examples are given.
Referring to fig. 1, in the present embodiment, a cooling, heating and power triple supply system with an energy storage device based on waste heat utilization of a gas internal combustion engine includes an internal combustion engine exhaust system, an internal combustion engine cylinder liner water cooling system, a high temperature flue gas driven lithium bromide solution system, a low pressure lithium bromide solution system, a low temperature water driven lithium bromide solution system, an absorption type lithium bromide unit cooling water system, a chilled water and cold storage system, and a hot water supply and heat storage system;
the internal combustion engine exhaust system comprises a gas internal combustion engine 1, a first control valve K1, a smoke hot water heat exchanger 18, a smoke generator 2 and a first mixer M1, wherein the first mixer M1 is connected with the smoke generator 2 and the smoke hot water heat exchanger 18, the first control valve K1 is connected with the gas internal combustion engine 1, the smoke generator 2 and the smoke hot water heat exchanger 18, the first control valve K1 is used for controlling the exhaust flow of high-temperature exhaust of the gas internal combustion engine 1 entering the smoke hot water heat exchanger 18 and the smoke generator 2, and the sizes of cooling load and heating load of the system are further controlled;
the internal combustion engine cylinder liner water cooling system comprises a gas internal combustion engine 1, a second control valve K2, a cylinder liner water generator 4, a second mixer M2 and a cylinder liner hydrothermal water heat exchanger 11, wherein the second control valve K2 is connected with the gas internal combustion engine 1, the cylinder liner water generator 4 and the cylinder liner hydrothermal water heat exchanger 11, the second control valve K2 controls the flow rate of cylinder liner water of the gas internal combustion engine 1 entering the cylinder liner water generator 4 and the cylinder liner hydrothermal water heat exchanger 11, and meanwhile, the cylinder liner hydrothermal water heat exchanger 11 is used as a cooling bypass of the internal combustion engine cylinder liner water cooling system to prevent the cylinder liner water temperature from being too high when the flow rate of the cylinder liner water generator 4 is too low;
the cooling water system of the absorption lithium bromide unit comprises an absorber 7, a condenser 5 and a cooling water air cooling tower 12, wherein a cooling water outlet of the cooling water air cooling tower 12, the absorber 7, the condenser 5 and a cooling water inlet of the cooling water air cooling tower 12 are sequentially connected, cooling water enters the absorber 7 from the cooling water air cooling tower 12, then enters the condenser 5, and finally returns to the cooling water air cooling tower 12 to complete cooling water circulation;
the chilled water and cold accumulation system comprises an evaporator 6, a cold accumulation device 16 and a cold user 17, wherein the outlet of the evaporator 6, the cold accumulation device 16, the cold user 17 and the inlet of the evaporator 6 are sequentially connected; the cooling temperature of the chilled water is 7 ℃, and the return temperature of the chilled water is 12 ℃; the cold accumulation device 16 realizes cold energy storage, and when the solar cold load is large in summer and the night cold load is small, the cold accumulation device 16 realizes night cold accumulation, releases and fully utilizes cold energy in the daytime;
the hot water supply and heat storage system comprises a cylinder sleeve hydrothermal water heat exchanger 11, a flue gas hydrothermal heat exchanger 18, a heat storage device 14 and a heat user 15, wherein a water outlet of the cylinder sleeve hydrothermal water heat exchanger 11 is connected with a water inlet of the heat storage device 14, a water outlet of the heat storage device 14 is connected with an input end of the heat user 15, an output end of the heat user 15 is connected with water inlets of the cylinder sleeve hydrothermal water heat exchanger 11 and the flue gas hydrothermal heat exchanger 18, and a water outlet of the flue gas hydrothermal heat exchanger 18 is connected with a water inlet of the heat storage device 14; the temperature of the hot water supply is 60 ℃, and the temperature of the return water of the hot water supply is 35 ℃; the heat storage device 14 realizes the storage of the heat load, and realizes the adjustment of the heat load when the heat load is not matched due to time intervals in winter;
the high-temperature flue gas driven lithium bromide solution system comprises a gas internal combustion engine 1, a flue gas generator 2, a low-pressure generator 3, a fifth mixer M5, a sixth mixer M6, a condenser 5, an evaporator 6, an absorber 7, a working medium pump 8, a low-pressure heat exchanger 9, a third control valve K3 and a high-pressure heat exchanger 10; the system comprises a gas internal combustion engine 1, a smoke generator 2, a low-pressure generator 3, a fifth mixer M5, a sixth mixer M6, a condenser 5, a throttle valve 13, an evaporator 6, an absorber 7, a working medium pump 8, a low-pressure heat exchanger 9, a third control valve K3, a high-pressure heat exchanger 10 and the smoke generator 2 which are connected in sequence; high-temperature exhaust gas of a gas internal combustion engine 1 is used as a heat source to enter a smoke generator 2, so that lithium bromide solution in the smoke generator 2 is evaporated and concentrated, high-temperature water vapor is evaporated and escaped out of the smoke generator 2, partial sensible heat is released by a low-pressure generator 3 and then flows into a condenser 5 through a fifth mixer M5 and a sixth mixer M6, low-temperature water is converted into low-temperature water through a throttle valve 13 and then enters an evaporator 6 to release cold energy to chilled water, the low-temperature water vapor is gasified into low-temperature steam which enters an absorber 7 to be absorbed by concentrated lithium bromide solution, and the diluted dilute lithium bromide aqueous solution is pressurized by a working medium pump 8, is heated by a low-pressure heat exchanger 9, a third control valve K3 and a high-pressure heat exchanger 10 and then flows into the smoke generator 2 to be continuously circulated;
the low-pressure lithium bromide solution system comprises a fourth control valve K4, a low-pressure generator 3, a sixth mixer M6, a condenser 5, an evaporator 6, an absorber 7 and a low-pressure heat exchanger 9; the fourth control valve K4, the low-pressure generator 3, the sixth mixer M6, the condenser 5, the evaporator 6 and the absorber 7 are sequentially connected, the smoke generator 2 is connected with the low-pressure generator 3, and the low-pressure generator 3, the fourth mixer M4, the low-pressure heat exchanger 9 and the absorber 7 are sequentially connected; the dilute lithium bromide solution flowing out of the fourth control valve K4 enters the low-pressure generator 3, steam is evaporated and concentrated under the drive of high-temperature steam from the smoke generator 2, and the steam becomes the dilute lithium bromide solution again after sequentially passing through the sixth mixer M6, the condenser 5, the evaporator 6 and the absorber 7; concentrated lithium bromide solution concentrated in the low-pressure generator 3 enters a low-pressure heat exchanger 9 through a mixer M4 for heat exchange and then enters an absorber 7;
the low-temperature water-driven lithium bromide solution system comprises a third control valve K3, a high-pressure heat exchanger 10, a third mixer M3, a fourth control valve K4, a cylinder liner water generator 4, a fifth mixer M5, a sixth mixer M6, a condenser 5, an evaporator 6, an absorber 7 and a low-pressure heat exchanger 9; the third control valve K3 and the high-pressure heat exchanger 10 are connected with a third mixer M3, the third mixer M3 is connected with a fourth control valve K4, the fourth control valve K4, the cylinder liner water generator 4, the fifth mixer M5, the sixth mixer M6, the condenser 5, the evaporator 6 and the absorber 7 are sequentially connected, and the cylinder liner water generator 4, the fourth mixer M4, the low-pressure heat exchanger 9 and the absorber 7 are sequentially connected; the dilute lithium bromide solution flowing out of the fourth control valve K4 enters a cylinder water generator 4, the dilute lithium bromide solution is evaporated and concentrated under the drive of high-temperature cylinder water, and the steam becomes the dilute lithium bromide solution again after sequentially passing through a fifth mixer M5, a sixth mixer M6, a condenser 5, an evaporator 6 and an absorber 7; concentrated lithium bromide solution concentrated in the cylinder water generator 4 enters the low-pressure heat exchanger 9 through a mixer M4 to exchange heat and then enters the absorber 7.
When the heat supply working condition is operated, the first control valve K1 is fully opened to the smoke hot water heat exchanger 18, the second control valve K2 is fully opened to the cylinder sleeve hot water heat exchanger 11, and the refrigerating system is closed.
When the cooling device operates in a cooling working condition, the first control valve K1 controls the flow of smoke to the smoke generator 2, and the second control valve K2 controls the flow of cylinder liner water to the cylinder liner water generator 4 to adjust the cooling capacity.
In this embodiment, the first control valve K1 controls the high-temperature exhaust flow entering the flue gas generator 2 and the flue gas hot water heat exchanger 18, so as to adjust the cooling and heating loads; the second control valve K2 controls the water flow of the cylinder sleeve entering the cylinder sleeve water generator 4 and the cylinder sleeve water-heating water heat exchanger 11, and realizes the bidirectional adjustment of cold and hot loads according to different seasons and different external load requirements.
In this embodiment, the third control valve K3 and the fourth control valve K4 control the flow of the dilute lithium bromide solution entering the smoke generator 2, the cylinder liner water generator 4 and the low pressure generator 3, thereby realizing the operating conditions of single operation of exhaust heat source drive, single operation of pure cylinder liner water heat source drive and mixed drive of the double-effect absorption lithium bromide unit.
Those not described in detail in this specification are well within the skill of the art.
Although the present invention has been described with reference to the above embodiments, it should be understood that the scope of the present invention is not limited thereto, and that various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the present invention.
Claims (3)
1. A combined cooling heating and power system with an energy storage device based on waste heat utilization of a gas internal combustion engine is characterized by comprising an internal combustion engine exhaust system, an internal combustion engine cylinder sleeve water cooling system, a high-temperature flue gas driven lithium bromide solution system, a low-pressure lithium bromide solution system, a low-temperature water driven lithium bromide solution system, an absorption type lithium bromide unit cooling water system, a chilled water and cold storage system and a hot water and heat storage system;
the internal combustion engine exhaust system comprises a gas internal combustion engine (1), a first control valve (K1), a smoke hot water heat exchanger (18), a smoke generator (2) and a first mixer (M1), wherein the first mixer (M1) is connected with the smoke generator (2) and the smoke hot water heat exchanger (18), the first control valve (K1) is connected with the gas internal combustion engine (1), the smoke generator (2) and the smoke hot water heat exchanger (18), the exhaust flow of high-temperature exhaust of the gas internal combustion engine (1) entering the smoke hot water heat exchanger (18) and the smoke generator (2) is controlled through the first control valve (K1), and the sizes of cooling load and heating load of the system are further controlled;
the internal combustion engine cylinder sleeve water cooling system comprises a gas internal combustion engine (1), a second control valve (K2), a cylinder sleeve water generator (4), a second mixer (M2) and a cylinder sleeve water hot water heat exchanger (11), wherein the second control valve (K2) is connected with the gas internal combustion engine (1), the cylinder sleeve water generator (4) and the cylinder sleeve water hot water heat exchanger (11), the second control valve (K2) controls the flow of cylinder sleeve water of the gas internal combustion engine (1) entering the cylinder sleeve water generator (4) and the cylinder sleeve water hot water heat exchanger (11), and meanwhile, the cylinder sleeve water hot water heat exchanger (11) is used as a cooling bypass of the internal combustion engine cylinder sleeve water cooling system to prevent overhigh water temperature when the flow of the cylinder sleeve water generator (4) is too small;
the cooling water system of the absorption type lithium bromide unit comprises an absorber (7), a condenser (5) and a cooling water air cooling tower (12), wherein a cooling water outlet of the cooling water air cooling tower (12), the absorber (7), the condenser (5) and a cooling water inlet of the cooling water air cooling tower (12) are sequentially connected, cooling water enters the absorber (7) from the cooling water air cooling tower (12), then enters the condenser (5) and finally flows back to the cooling water air cooling tower (12) to complete cooling water circulation;
the chilled water and cold accumulation system comprises an evaporator (6), a cold accumulation device (16) and a cold user (17), wherein an outlet of the evaporator (6), the cold accumulation device (16), the cold user (17) and an inlet of the evaporator (6) are sequentially connected; the cold storage device (16) realizes the storage of cold energy, and when the cold load is large in summer and small in night cold load, the cold storage device (16) realizes the cold storage at night and releases and fully utilizes the cold energy in the day;
the hot water supply and heat storage system comprises a cylinder sleeve hydrothermal water heat exchanger (11), a flue gas hydrothermal heat exchanger (18), a heat storage device (14) and a hot user (15), wherein a water outlet of the cylinder sleeve hydrothermal water heat exchanger (11) is connected with a water inlet of the heat storage device (14), a water outlet of the heat storage device (14) is connected with an input end of the hot user (15), an output end of the hot user (15) is connected with water inlets of the cylinder sleeve hydrothermal water heat exchanger (11) and the flue gas hydrothermal heat exchanger (18), and a water outlet of the flue gas hydrothermal heat exchanger (18) is connected with a water inlet of the heat storage device (14); the heat storage device (14) realizes the storage of the heat load, and realizes the adjustment of the heat load when the heat load is not matched due to time intervals in winter;
the high-temperature flue gas driven lithium bromide solution system comprises a gas internal combustion engine (1), a flue gas generator (2), a low-pressure generator (3), a fifth mixer (M5), a sixth mixer (M6), a condenser (5), an evaporator (6), an absorber (7), a working medium pump (8), a low-pressure heat exchanger (9), a third control valve (K3) and a high-pressure heat exchanger (10); the gas-fired internal combustion engine (1), the smoke generator (2), the low-pressure generator (3), the fifth mixer (M5), the sixth mixer (M6), the condenser (5), the throttle valve (13), the evaporator (6), the absorber (7), the working medium pump (8), the low-pressure heat exchanger (9), the third control valve (K3), the high-pressure heat exchanger (10) and the smoke generator (2) are sequentially connected; high-temperature exhaust gas of the gas internal combustion engine (1) is used as a heat source to enter the smoke generator (2), so that lithium bromide solution in the smoke generator (2) is evaporated and concentrated, high-temperature water vapor is evaporated and escaped out of the smoke generator (2), partial sensible heat is released by the low-pressure generator (3), the high-temperature water vapor flows into the condenser (5) through the fifth mixer (M5) and the sixth mixer (M6), the low-temperature water is changed into low-temperature water through the throttle valve (13) and then enters the evaporator (6) to release cold energy to chilled water, the low-temperature water vapor is gasified into low-temperature steam, the low-temperature steam enters the absorber (7) to be absorbed by concentrated lithium bromide solution, and the diluted dilute lithium bromide aqueous solution is pressurized by the working medium pump (8) and then flows into the smoke generator (2) to be continuously circulated after being heated by the low-pressure heat exchanger (9), the third control valve (K3) and the high-pressure heat exchanger (10);
the low-pressure lithium bromide solution system comprises a fourth control valve (K4), a low-pressure generator (3), a sixth mixer (M6), a condenser (5), an evaporator (6), an absorber (7) and a low-pressure heat exchanger (9); the fourth control valve (K4), the low-pressure generator (3), the sixth mixer (M6), the condenser (5), the evaporator (6) and the absorber (7) are sequentially connected, the smoke generator (2) is connected with the low-pressure generator (3), and the low-pressure generator (3), the fourth mixer (M4), the low-pressure heat exchanger (9) and the absorber (7) are sequentially connected; the dilute lithium bromide solution flowing out of the fourth control valve (K4) enters a low-pressure generator (3), steam is evaporated and concentrated under the drive of high-temperature steam from a smoke generator (2), and the steam becomes dilute lithium bromide solution again after sequentially passing through a sixth mixer (M6), a condenser (5), an evaporator (6) and an absorber (7); concentrated lithium bromide solution concentrated in the low-pressure generator (3) enters a low-pressure heat exchanger (9) for heat exchange after passing through a mixer (M4) and then enters an absorber (7);
the low-temperature water-driven lithium bromide solution system comprises a third control valve (K3), a high-pressure heat exchanger (10), a third mixer (M3), a fourth control valve (K4), a cylinder liner water generator (4), a fifth mixer (M5), a sixth mixer (M6), a condenser (5), an evaporator (6), an absorber (7) and a low-pressure heat exchanger (9); the three-position control valve (K3) and the high-pressure heat exchanger (10) are connected with a three-position mixer (M3), the three-position mixer (M3) is connected with a four-position control valve (K4), the four-position control valve (K4), the cylinder sleeve water generator (4), the five-position mixer (M5), the six-position mixer (M6), the condenser (5), the evaporator (6) and the absorber (7) are sequentially connected, and the cylinder sleeve water generator (4), the four-position mixer (M4), the low-pressure heat exchanger (9) and the absorber (7) are sequentially connected; the dilute lithium bromide solution flowing out of the fourth control valve (K4) enters a cylinder sleeve water generator (4), the dilute lithium bromide solution is evaporated and concentrated under the drive of high-temperature cylinder sleeve water, and the steam becomes the dilute lithium bromide solution again after sequentially passing through a fifth mixer (M5), a sixth mixer (M6), a condenser (5), an evaporator (6) and an absorber (7); concentrated lithium bromide solution concentrated in the cylinder liner water generator (4) enters a low-pressure heat exchanger (9) through a fourth mixer (M4) for heat exchange and then enters an absorber (7).
2. The combined cooling heating and power system with the energy storage device based on the waste heat utilization of the gas internal combustion engine as claimed in claim 1, wherein the first control valve (K1) controls the high-temperature exhaust flow entering the flue gas generator (2) and the flue gas hot water heat exchanger (18) to play a role in adjusting cooling and heating loads; and the second control valve (K2) controls the water flow of the cylinder sleeve entering the cylinder sleeve water generator (4) and the cylinder sleeve water-heating water heat exchanger (11), and realizes the bidirectional regulation of cold and hot loads according to different seasons and different external load requirements.
3. The combined cooling, heating and power system with the energy storage device based on the waste heat utilization of the gas internal combustion engine as claimed in claim 1, wherein the third control valve (K3) and the fourth control valve (K4) control the flow of dilute lithium bromide solution entering the smoke generator (2), the cylinder liner water generator (4) and the low pressure generator (3), so that the working conditions of single operation of exhaust heat source driving, single operation of pure cylinder liner water heat source driving and mixed driving of the double-effect absorption lithium bromide unit are realized.
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