CN113720040B - Combined cooling, heating and power system with waste heat grading recovery and absorption type refrigerating device - Google Patents
Combined cooling, heating and power system with waste heat grading recovery and absorption type refrigerating device Download PDFInfo
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- CN113720040B CN113720040B CN202111076546.1A CN202111076546A CN113720040B CN 113720040 B CN113720040 B CN 113720040B CN 202111076546 A CN202111076546 A CN 202111076546A CN 113720040 B CN113720040 B CN 113720040B
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 27
- 239000002918 waste heat Substances 0.000 title claims abstract description 19
- 238000001816 cooling Methods 0.000 title claims abstract description 16
- 238000010438 heat treatment Methods 0.000 title claims abstract description 13
- 238000011084 recovery Methods 0.000 title claims abstract description 8
- 239000000110 cooling liquid Substances 0.000 claims abstract description 99
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 52
- 238000010248 power generation Methods 0.000 claims abstract description 31
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 22
- 238000002485 combustion reaction Methods 0.000 claims abstract description 17
- 238000005057 refrigeration Methods 0.000 claims abstract description 17
- 239000000498 cooling water Substances 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 56
- 239000003507 refrigerant Substances 0.000 claims description 40
- 239000006096 absorbing agent Substances 0.000 claims description 32
- 239000007788 liquid Substances 0.000 claims description 9
- 238000003860 storage Methods 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000012782 phase change material Substances 0.000 description 10
- 239000000446 fuel Substances 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 239000002826 coolant Substances 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 229910013553 LiNO Inorganic materials 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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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
- 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
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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 by exhaust energy
- F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat
- F01N5/025—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat the device being thermoelectric generators
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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
- F25B15/04—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being ammonia evaporated from aqueous solution
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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
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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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
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/04—Arrangement or mounting of control or safety devices for sorption type machines, plants or systems
- F25B49/043—Operating continuously
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N11/00—Generators or motors not provided for elsewhere; Alleged perpetua mobilia obtained by electric or magnetic means
- H02N11/002—Generators
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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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
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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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
The invention aims to provide a combined cooling, heating and power system with a waste heat grading recovery and absorption type refrigerating device, which comprises a liquid ammonia tank, a cooling water tank, an ammonia internal combustion engine, a heat accumulating type temperature difference power generation device, a cooling liquid control unit and an absorption type refrigerating unit, wherein the cooling liquid control unit comprises a temperature control unit, a first temperature sensor, a second temperature sensor, a first electric control three-way valve and a second electric control three-way valve. The invention fully utilizes the waste heat in the power generation system, provides cold energy while generating power by the waste heat, and recovers the waste heat in a grading way to the maximum extent, thereby improving the energy utilization rate of the system. The cooling liquid control unit is arranged, the working circulation of the cooling liquid can be controlled through the temperature control unit, the circulation utilization rate of the cooling liquid is improved, the controllability and the high efficiency of the absorption refrigeration system are ensured, the cost is saved, and the economic benefit of the system is improved.
Description
Technical Field
The invention relates to clean energy, in particular to a combined cooling heating and power system.
Background
With the continuous development of science and technology and society, the demand of human beings for energy is continuously increased, which leads to the overuse and exhaustion of energy, and the situation of energy shortage is more and more severe. The combined cooling heating and power technology follows the principle of energy cascade utilization, has high energy, high use, low energy and low use, optimizes energy supply and distribution, is favorable for reducing the loss in the energy conversion process, improves the energy utilization rate, has extremely high economic and social benefits, and is a necessary choice for sustainable development in the energy field.
The combined cooling, heating and power system is carried out by combining an internal combustion engine with thermoelectric generation and absorption refrigeration, tail gas after fuel combustion carries a large amount of high-grade waste heat energy, and cylinder sleeve cooling liquid of the internal combustion engine also carries a large amount of heat at the same time, so that the waste heat is low in grade, but the reserve volume is huge, and the combined cooling, heating and power system can be used as a heat source of the combined production system. The thermoelectric power generation device absorbs high-grade heat generated by the power generation system to directly perform heat-electricity conversion, and compared with a Rankine cycle power generation system, the thermoelectric power generation device has a simpler structure, reduces the energy conversion times, greatly reduces the requirements on heat sources, does not need a compressor to provide power for circulation in an absorption refrigeration cycle, reduces the input of system electric energy, provides low-grade energy generated by the power generation system for driving heat energy required by the circulation, and can efficiently provide cold, heat and electric quantity, so that the thermoelectric power generation device is energy-saving and environment-friendly while making the best use of things.
Disclosure of Invention
The invention aims to provide a combined cooling, heating and power system with a waste heat grading recovery and absorption type refrigerating device, which solves the problems that low-grade waste heat is difficult to utilize and the like.
The purpose of the invention is realized as follows:
the invention relates to a combined cooling, heating and power system with a waste heat grading recovery and absorption type refrigerating device, which is characterized in that: the device comprises a liquid ammonia tank, a cooling water tank, an ammonia internal combustion engine, a heat accumulating type temperature difference power generation device, a cooling liquid control unit and an absorption type refrigeration unit, wherein the cooling liquid control unit comprises a temperature control unit, a first temperature sensor, a second temperature sensor, a first electric control three-way valve and a second electric control three-way valve, the absorption type refrigeration unit comprises an absorber, a heat exchanger, a generator, a condenser and an evaporator, the liquid ammonia tank is connected with a preheater through a stop valve, the preheater is connected with the ammonia internal combustion engine, the ammonia internal combustion engine is connected with a generator, an outlet of the cooling water tank comprises three paths, the first path is connected with a cold side of the heat accumulating type temperature difference power generation device, tail gas of the ammonia internal combustion engine is communicated with a hot side of the heat accumulating type temperature difference power generation device, the heat accumulating type temperature difference power generation device is connected with a storage battery through a rectifying device, the storage battery is connected with the generator in parallel and is connected with a load, and the second path is connected with the ammonia internal combustion engine through a first expansion valve, the third path is connected with a condenser through a second expansion valve, a first temperature sensor, a second temperature sensor, a first electric control three-way valve and a second electric control three-way valve are all connected with a temperature control unit, cooling liquid of the heat accumulating type thermoelectric power generation device flows into the first electric control three-way valve through the first temperature sensor, the first electric control three-way valve is respectively communicated with the condenser and a water collecting tank, a high-temperature cylinder liner cooling liquid chamber of the ammonia internal combustion engine is connected with a generator, the generator is connected with the second electric control three-way valve through the second temperature sensor, the second electric control three-way valve is respectively connected with the condenser and the water collecting tank, refrigerant solution enters a heat exchanger through a working medium pump from an absorber, the outlet of the heat exchanger is connected with the generator, the refrigerant solution absorbs heat in the generator and becomes refrigerant steam, the residual concentrated solution flows into the heat exchanger from the outlet of the generator, the low-temperature refrigerant solution returns to the absorber after being preheated, and the refrigerant steam enters the condenser and becomes liquid refrigerant, the liquid refrigerant enters the absorber through the evaporator, and the condenser is connected with the absorber.
The present invention may further comprise:
1. when the temperatures of the cooling liquid measured by the first temperature sensor and the second temperature sensor are lower than a set value, the first electric control three-way valve and the second electric control three-way valve are connected to a condenser cooling liquid inlet channel, the first electric control three-way valve and the second electric control three-way valve are closed and connected to a water collecting tank channel, the cooling liquid enters the condenser to cool refrigerant steam, a condenser cooling liquid outlet is connected with an absorber cooling liquid inlet, and an absorber cooling liquid outlet is connected with a cooling water tank to complete cooling liquid circulation.
2. When the temperature of the cooling liquid measured by the first temperature sensor or the second temperature sensor is higher than a set value, the first electric control three-way valve and the second electric control three-way valve, which measure the temperature lower than the set value, are connected to a cooling liquid inlet channel of the condenser and are connected to a water collecting tank channel to be closed, the cooling liquid enters the condenser to cool the refrigerant vapor and then returns to the water tank through the circulation of the absorption refrigeration system to complete the circulation of the cooling liquid, the first electric control three-way valve and the second electric control three-way valve, which measure the temperature higher than the set value, are opened and connected to the water collecting tank, the cooling liquid enters the water collecting tank, an outlet of the water collecting tank is connected with a water pump, the cooling liquid which does not meet the temperature returns to the cooling water tank through the water pump to be cooled for waiting for the next working cycle, meanwhile, the second expansion valve is opened, the cooling liquid enters the condenser through the second expansion valve to cool the refrigerant vapor, an outlet of the condenser is connected with a cooling liquid inlet of the absorber, and an outlet of the cooling liquid of the absorber is connected with the water tank, and the circulation of the cooling liquid is completed.
3. When the temperatures of the cooling liquids measured by the first temperature sensor and the second temperature sensor are higher than a set value, the first electric control three-way valve and the second electric control three-way valve are closed and connected with a cooling liquid inlet channel of the condenser, the first electric control three-way valve and the second electric control three-way valve are opened and connected with a water collecting tank channel, the cooling liquid enters a water collecting tank, an outlet of the water collecting tank is connected with a water pump, the cooling liquid which does not meet the temperature returns to the cooling water tank through the water pump to be cooled to wait for the next work cycle, meanwhile, a second expansion valve is opened, the cooling liquid enters the condenser through the second expansion valve to cool the refrigerant vapor, a cooling liquid outlet of the condenser is connected with a cooling liquid inlet of the absorber, and a cooling liquid outlet of the absorber is connected with a water tank to finish the circulation of the cooling liquid.
The invention has the advantages that:
1. the waste heat in the power generation system is fully utilized, the cold energy is provided while the waste heat is used for generating power, the waste heat is recycled in a grading manner to the maximum extent, and the energy utilization rate of the system is improved.
2. The cooling liquid control unit is arranged, the working cycle of the cooling liquid can be controlled through the temperature control unit, the cyclic utilization rate of the cooling liquid is improved, the controllability and the high efficiency of the absorption refrigeration system are ensured, the cost is saved, and the economic benefit of the system is improved.
3. The heat storage type thermoelectric power generation device is used for recycling the waste heat of the ammonia fuel engine to directly convert the heat energy into the electric energy, the heat-work-electricity energy conversion times are reduced, the energy loss is reduced, the phase change material is added to effectively stabilize the hot end temperature of the thermoelectric power generation piece, when the exhaust temperature is lower than the phase change temperature, the phase change material can release the stored latent heat to maintain the hot end temperature of the thermoelectric power generation piece, the burden of the voltage stabilizing circuit is relieved, and the power generation time is prolonged.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
The invention will now be described in more detail by way of example with reference to the accompanying drawings in which:
referring to fig. 1, the invention includes a cooling liquid control unit 1, an absorption refrigeration system 2, a liquid ammonia tank 3, a stop valve 4, a preheater 5, an ammonia internal combustion engine 6, a generator 7, a load 8, a cooling liquid 9, expansion valves 10a and 10b, a heat accumulating type thermoelectric power generation device 11, a rectifying device 12, a storage battery 13, a water collector 14 and a water pump 15, wherein the cooling liquid system includes a cooling liquid tank 9, expansion valves 10a and 10b, a cooling liquid control unit 1, a water collector 14 and a water pump 15, the cooling liquid control unit 1 includes a first temperature sensor 101, a second temperature sensor 102, a temperature control unit 103, a first electric control three-way valve 104 and a second electric control three-way valve 105, and the absorption refrigeration system 2 includes a refrigerant tank 201, an absorber 202, a working medium pump 203, a heat exchanger 204, a generator 205, a condenser 206 and an evaporator 207.
The utility model discloses a thermoelectric conversion device, including liquid ammonia jar 3, ammonia fuel, generator 7, heat accumulation formula thermoelectric generation device 11, storage battery 13 and load link and provide electric power for load 8, 3 exports of liquid ammonia jar through stop valve 4 entering preheater 5, and the ammonia fuel after preheating is connected with ammonia fuel engine 6 in 5 exports of preheater, ammonia fuel engine 6 is connected with generator 7, and generator 7 provides electric power for load 8, the tail gas of ammonia fuel engine 6 discharges behind the 11 hot sides of heat accumulation formula thermoelectric generation device, and phase change material in the heat accumulation formula thermoelectric generation device 11 absorbs and stores the tail gas heat, makes thermoelectric generation device produce the difference in temperature from top to bottom and carries out thermoelectric conversion, produces the electric energy and stores in storage battery 13 through fairing 12, and storage battery 13 and load link for load 8 provide electric power.
Refrigerant solution in the absorption refrigeration system 2 enters an absorber 202 and enters a heat exchanger 204 through a working medium pump 203, the outlet of the heat exchanger 204 is connected with a generator 205, high-temperature cylinder liner cooling liquid heated by the ammonia fuel engine 6 enters the generator 205 of the absorption refrigeration system 2, the refrigerant is subjected to heat absorption and is converted into refrigerant vapor in the generator 205, residual concentrated solution flows into the heat exchanger 204 from the outlet of the generator 205 to preheat low-temperature refrigerant solution and then returns to the absorber 202, the refrigerant vapor enters a condenser 206 for heat release and is converted into liquid refrigerant, the refrigerant liquid enters an evaporator 207, the refrigerant absorbs heat in hot air in the evaporator 207 and is evaporated to release cold energy, and the evaporated refrigerant enters the absorber 202 and is absorbed by the absorbent to enter the next cycle.
The outlet of the water tank 9 is divided into three paths, one path of the refrigerant enters the cold side of the heat accumulating type temperature difference power generation device 11 to be used as a refrigerant, the other path of the refrigerant enters the ammonia fuel engine 6 through a first expansion valve 10a to be cooled, and the third path of the refrigerant enters the condenser 206 through a second expansion valve 10b to be cooled. Wherein, the low-temperature cylinder liner cooling liquid which provides heat for the absorption refrigeration system 2 and the cooling liquid which flows through the cold side of the heat accumulating type thermoelectric power generation device are respectively subjected to temperature measurement by a first temperature sensor 101 and a second temperature sensor 102, the measured temperatures are respectively transmitted to a temperature control unit 103, and the temperature control unit 103 transmits electric signals to a first electric control three-way valve 104 and a second electric control three-way valve 105 to control the flow direction of the cooling liquid.
In this embodiment, the phase change material filled in the phase change energy storage device should preferably have a suitable phase change temperature, should have a large phase change latent heat value, may be a single phase change material or a composite phase change material, and is preferably filled in the heat accumulating type thermoelectric power generation device 11 with the phase change material having the phase change temperature of 200 to 300 ℃. The phase-change material selected by the invention is shown as follows, and the phase-change material LiNO is preferably filled in the energy storage device in the heat accumulating type thermoelectric power generation device 11 3 NaCl, wherein LiNO 3 The mass ratio of the NaCl is 86.5 percent, the phase-change temperature of the phase-change material is 255 ℃, and the latent heat of phase change is 354 kJ.kg -1 。
If the temperatures of the cooling liquids measured by the first temperature sensor 101 and the second temperature sensor 102 are both lower than a set value, the first electric control three-way valve 104 and the second electric control three-way valve 105 are controlled to be connected to a cooling liquid inlet channel of the condenser 206, the channel connected to the water collecting tank 14 is closed, the cooling liquid enters the condenser 206 to cool the refrigerant vapor, a cooling liquid outlet of the condenser 206 is connected with a cooling liquid inlet of the absorber 202, and a cooling liquid outlet of the absorber 202 is connected with the water tank 9, so that the cooling liquid circulation is completed.
If the temperature of the coolant measured by the first temperature sensor 101 or the second temperature sensor 102 is higher than the set value, the channel connected to the coolant inlet of the condenser 206 and having the temperature lower than the set value in the first electric three-way valve 104 and the second electric three-way valve 105 is controlled, the channel connected to the header tank 14 is closed, and the coolant enters the condenser 206 to cool the refrigerant vapor, passes through the absorption refrigeration system cycle 2, and then returns to the water tank 9 to complete the coolant circulation. Controlling the temperature measured by the first electric control three-way valve 104 and the second electric control three-way valve 105 to be higher than a set value, opening a channel connected to the water collecting tank 14, enabling the cooling liquid to enter the water collecting tank 14, enabling an outlet of the water collecting tank 14 to be connected with the water pump 15, and enabling the cooling liquid which does not meet the temperature to return to the water tank 9 through the water pump 15 to be cooled for waiting for the next working cycle. Meanwhile, the temperature control unit 103 transmits an electric signal to the second expansion valve 10b to open, the cooling liquid enters the condenser 206 through the second expansion valve 10b to cool the refrigerant vapor, the cooling liquid outlet of the condenser 206 is connected with the cooling liquid inlet of the absorber 202, and the cooling liquid outlet of the absorber 202 is connected with the water tank 9, thereby completing the cooling liquid circulation.
If the temperatures of the cooling liquids measured by the first temperature sensor 101 and the second temperature sensor 102 are both higher than a set value, the first electric control three-way valve 104 and the second electric control three-way valve 105 are controlled to close a cooling liquid inlet channel connected with the condenser 206 and open a channel connected with the water collecting tank 14, the cooling liquid enters the water collecting tank 14, an outlet of the water collecting tank 14 is connected with the water pump 15, and the cooling liquid which does not meet the temperature returns to the water tank 9 through the water pump 15 to be cooled for waiting for the next working cycle. Meanwhile, the temperature control unit 103 transmits an electric signal to the second expansion valve 10b to open, the cooling liquid enters the condenser 206 through the second expansion valve 10b to cool the refrigerant vapor, the cooling liquid outlet of the condenser 206 is connected with the cooling liquid inlet of the absorber 202, and the cooling liquid outlet of the absorber 202 is connected with the water tank 9, thereby completing the cooling liquid circulation.
Claims (4)
1. The utility model provides a take waste heat to retrieve in grades and absorption refrigeration device's combined cooling heating and power system which characterized by: the device comprises a liquid ammonia tank, a cooling water tank, an ammonia internal combustion engine, a heat accumulating type temperature difference power generation device, a cooling liquid control unit and an absorption type refrigeration unit, wherein the cooling liquid control unit comprises a temperature control unit, a first temperature sensor, a second temperature sensor, a first electric control three-way valve and a second electric control three-way valve, the absorption type refrigeration unit comprises an absorber, a heat exchanger, a generator, a condenser and an evaporator, the liquid ammonia tank is connected with a preheater through a stop valve, the preheater is connected with the ammonia internal combustion engine, the ammonia internal combustion engine is connected with the generator, an outlet of the cooling water tank comprises three paths, the first path is connected with a cold side of the heat accumulating type temperature difference power generation device, tail gas of the ammonia internal combustion engine is communicated with a hot side of the heat accumulating type temperature difference power generation device, the heat accumulating type temperature difference power generation device is connected with a storage battery through a rectifying device, the storage battery is connected with the generator in parallel and is connected with a load, and the second path is connected with the ammonia internal combustion engine through a first expansion valve, the third path is connected with a condenser through a second expansion valve, a first temperature sensor, a second temperature sensor, a first electric control three-way valve and a second electric control three-way valve are all connected with a temperature control unit, cooling liquid of the heat accumulating type thermoelectric power generation device flows into the first electric control three-way valve through the first temperature sensor, the first electric control three-way valve is respectively communicated with the condenser and a water collecting tank, a high-temperature cylinder liner cooling liquid chamber of the ammonia internal combustion engine is connected with a generator, the generator is connected with the second electric control three-way valve through the second temperature sensor, the second electric control three-way valve is respectively connected with the condenser and the water collecting tank, refrigerant solution enters a heat exchanger through a working medium pump from an absorber, the outlet of the heat exchanger is connected with the generator, the refrigerant solution absorbs heat in the generator and becomes refrigerant steam, the residual concentrated solution flows into the heat exchanger from the outlet of the generator, the low-temperature refrigerant solution returns to the absorber after being preheated, and the refrigerant steam enters the condenser and becomes liquid refrigerant, the liquid refrigerant enters the absorber through the evaporator, and the condenser is connected with the absorber.
2. The combined cooling, heating and power generation system with the waste heat graded recovery and absorption type refrigerating device as claimed in claim 1, characterized in that: when the temperatures of the cooling liquid measured by the first temperature sensor and the second temperature sensor are lower than a set value, the first electric control three-way valve and the second electric control three-way valve are connected to a condenser cooling liquid inlet channel, the first electric control three-way valve and the second electric control three-way valve are closed and connected to a water collecting tank channel, the cooling liquid enters the condenser to cool refrigerant steam, a condenser cooling liquid outlet is connected with an absorber cooling liquid inlet, and an absorber cooling liquid outlet is connected with a cooling water tank to complete cooling liquid circulation.
3. The combined cooling, heating and power generation system with the waste heat graded recovery and absorption type refrigerating device as claimed in claim 1, characterized in that: when the temperature of the cooling liquid measured by the first temperature sensor or the second temperature sensor is higher than a set value, the first electric control three-way valve and the second electric control three-way valve, which measure the temperature lower than the set value, are connected to a cooling liquid inlet channel of the condenser and are connected to a water collecting tank channel to be closed, the cooling liquid enters the condenser to cool the refrigerant vapor and then returns to the water tank through the circulation of the absorption refrigeration system to complete the circulation of the cooling liquid, the first electric control three-way valve and the second electric control three-way valve, which measure the temperature higher than the set value, are opened and connected to the water collecting tank, the cooling liquid enters the water collecting tank, an outlet of the water collecting tank is connected with a water pump, the cooling liquid which does not meet the temperature returns to the cooling water tank through the water pump to be cooled for waiting for the next working cycle, meanwhile, the second expansion valve is opened, the cooling liquid enters the condenser through the second expansion valve to cool the refrigerant vapor, an outlet of the condenser is connected with a cooling liquid inlet of the absorber, and an outlet of the cooling liquid of the absorber is connected with the water tank, and the circulation of the cooling liquid is completed.
4. The combined cooling, heating and power generation system with the waste heat graded recovery and absorption type refrigerating device as claimed in claim 1, wherein: when the temperatures of the cooling liquid measured by the first temperature sensor and the second temperature sensor are higher than a set value, the first electric control three-way valve and the second electric control three-way valve are closed to be connected with a cooling liquid inlet channel of the condenser, the first electric control three-way valve and the second electric control three-way valve are opened to be connected with a water collecting tank channel, the cooling liquid enters a water collecting tank, an outlet of the water collecting tank is connected with a water pump, the cooling liquid which does not meet the temperature returns to the cooling water tank through the water pump to be cooled for waiting for the next working cycle, meanwhile, the second expansion valve is opened, the cooling liquid enters the condenser through the second expansion valve to cool refrigerant steam, a cooling liquid outlet of the condenser is connected with a cooling liquid inlet of the absorber, and a cooling liquid outlet of the absorber is connected with a water tank to finish cooling liquid circulation.
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