CN107476897A - A kind of residual neat recovering system and its recovery method for LNG automobile engines - Google Patents
A kind of residual neat recovering system and its recovery method for LNG automobile engines Download PDFInfo
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- CN107476897A CN107476897A CN201710858168.XA CN201710858168A CN107476897A CN 107476897 A CN107476897 A CN 107476897A CN 201710858168 A CN201710858168 A CN 201710858168A CN 107476897 A CN107476897 A CN 107476897A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G5/00—Profiting from waste heat of combustion engines, not otherwise provided for
- F02G5/02—Profiting from waste heat of exhaust gases
- F02G5/04—Profiting from waste heat of exhaust gases in combination with other waste heat from combustion engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- 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
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
- F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
- F01K23/065—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle the combustion taking place in an internal combustion piston engine, e.g. a diesel engine
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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
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
- F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
- F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
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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)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a kind of residual neat recovering system and its recovery method for LNG automobile engines, the technical problem of solution is how vehicle exhaust and engine coolant institute dispersed heat rationally to be utilized, simultaneously using the cold energy of LNG fuel, automobile fuel ecomomy is effectively improved.The present invention includes recovery motor exhaust and cools down organic rankine cycle system, the cold energy use of LNG fuel and the heating system of fluid residual heat, organic rankine cycle system includes heat transfer oil circulation loop and organic working medium closed circuit, heat transfer oil circulation loop includes tail gas heat-condutive oil heat exchanger, heat conduction oil circulating pump and evaporator, the conduction oil outlet of evaporator is connected by heat conduction oil circulating pump with the heat conductive oil inlet of tail gas heat-condutive oil heat exchanger, and conduction oil outlet is connected with the heat conductive oil inlet of evaporator.The present invention rationally utilizes vehicle exhaust and coolant institute dispersed heat, and LNG cold energy is also fully utilized by while engine exhaust heat is recycled.
Description
Technical field
The present invention relates to LNG car engine machine equipments, and in particular to the one of the organic Rankine bottoming cycle field that waste heat energy utilizes
Residual neat recovering system and its recovery method of the kind for LNG automobile engines.
Background technology
Liquefied natural gas（Liquefied Natural Gas, LNG）It is that natural gas passes through purified treatment, is cooled to -162
The liquid formed when below degree Celsius.LNG component is purer than gaseous natural gas, eliminates dust, sour gas, again
The components such as hydrocarbon, colourless, tasteless, nontoxic and non-corrosiveness.Automobile diesel oil substitute automobile using LNG as fuel can effectively reduce harmful
Gas and granular material discharged, compared with the bus of diesel engine, the LNG buses of natural gas engine reduce the one of 99%
Carbonoxide, 83% hydrocarbon, 31% oxynitride discharge, no particulate matter and soot emissions, and it is substantially free of lead, sulphur
Compound, benzene etc.；LNG automobiles can also effectively reduce noise pollution simultaneously.In addition, LNG buses are about saved relative to diesel vehicle
22% fuel cost, LNG heavy trucks save about 15% fuel cost relative to diesel oil heavy truck.Therefore, in environment-friendly advantage and
Under the double drive of economic advantages, LNG automobile industries welcome the gold period of development, especially LNG heavy trucks and public transport
Car is by as the development bright spot of the coming years.
The thermal efficiency of usual automobile engine can only achieve 30% or so, and remaining heat is inevitably following
Part consumes, and includes other mechanical accessory equipment of engine-cooling system (25%), automobile exhaust system (40%) and automobile
(5%).How vehicle exhaust and coolant institute dispersed heat are rationally utilized, reduce consumption of the automobile to fuel, together
Shi Youxiao reduces discharge, and it is automobile engine development urgent problem to reduce the pollution to environment.
And organic Rankine bottoming cycle（ORC）System is the Rankine cycle system using organic working medium as cycle fluid, is recovery
The important technical of automobile engine residual heat energy.However, miniaturization, light-weighted ORC system are to realize LNG automobile engines
The recoverable precondition of waste heat, the system of high efficient heat exchanging means, efficient expansion machine and optimization are to realize that ORC system is small-sized
Change, light-weighted important means, be the important leverage that ORC system is applied successfully in LNG automobile engines.
The content of the invention
The technical problem to be solved in the present invention is how vehicle exhaust and engine coolant institute dispersed heat to be carried out
Rationally utilize, while using the cold energy of LNG fuel, so as to reduce consumption of the automobile to fuel, while effectively reduce discharge, drop
The low pollution to environment, there is provided a kind of cold energy for also making full use of LNG to be contained while engine exhaust heat is recycled
Residual neat recovering system and its recovery method for LNG automobile engines.
In order to solve the above technical problems, the present invention uses following technical proposals：A kind of waste heat for LNG automobile engines
Recovery system, including recovery motor exhaust and cool down the organic rankine cycle system of fluid residual heat, the cold energy use of LNG fuel and add
Hot systems, described organic rankine cycle system include heat transfer oil circulation loop and organic working medium closed circuit, described heat conduction
Oily circulation loop includes tail gas-heat-condutive oil heat exchanger, heat conduction oil circulating pump and evaporator, and the conduction oil outlet of evaporator is by leading
Circular-pump is connected with the heat conductive oil inlet of tail gas-heat-condutive oil heat exchanger, the conduction oil outlet of tail gas-heat-condutive oil heat exchanger with
The heat conductive oil inlet of evaporator is connected；
Described organic working medium closed circuit includes expanding machine, regenerator, air-cooled condenser, LNG- organic working mediums heat exchanger, had
Machine working medium circulating pump, oil-organic working medium separator, preheater, the organic working medium outlet of described evaporator and entering for expanding machine
Mouth is connected, the outlet of expanding machine passes sequentially through regenerator, the circulation of air-cooled condenser, LNG- organic working mediums heat exchanger, organic working medium
It is connected after pump, regenerator with the organic working medium import of evaporator.
Described LNG fuel cold energy use and heating system include storage tank, preposition heat exchange coil, the LNG- of air-cooled condenser
Organic working medium heat exchanger, heat exchange coil and engine, described storage tank are organic with preposition heat exchange coil, LNG- successively by pipeline
Working fluid heat exchanger, heat exchange coil are connected with engine.
Described heat exchange coil is positioned in engine lubrication oil sump.
The offgas outlet of described engine is connected with tail gas-heat-condutive oil heat exchanger.
The pipeline being connected with the outlet of the organic working medium of evaporator is provided with the bypass in parallel with expanding machine, in described bypass
Provided with electromagnetic valve I, expanding machine both ends are provided with electromagnetic valve II and electromagnetic valve II I；The pipeline in parallel with regenerator is provided with magnetic valve
IV, magnetic valve V and magnetic valve VI are respectively equipped with the pipeline that regenerator both ends are connected with expanding machine and air-cooled condenser；With evaporation
Temperature sensor is additionally provided with the pipeline that the organic working medium outlet of device is connected.
Oil-organic working medium separator is additionally provided between described organic working medium circulating pump and regenerator.
Described oil-organic working medium separator includes housing, and housing upper is provided with import, bottom goes out provided with organic working medium
Mouthful, housing side is provided with oil export, and enclosure interior is provided with baffle plate and filler plate, and described baffle plate setting is below import, baffle plate
Gap is left between side and inner walls；Described filler plate is inclined in housing；Described baffle plate include transverse slat and
Swash plate, transverse slat and horizontal " V " template of swash plate composition, between being connected with inner walls on the right side of transverse slat, being left between left side and inner walls
Gap, swash plate left side extend to the right after being connected with transverse slat.
Fluid level sensor is additionally provided with housing above described filler plate, the pipeline being connected with oil export is provided with electricity
Magnet valve；Described filler plate is superoleophobic plate of material；The inside pipe wall of described air-cooled condenser is provided with super oleophobic coating.
A kind of exhaust heat recovering method for LNG automobile engine residual heat recovery systems, it is characterised in that including following step
Suddenly：1. the tail gas into heat transfer oil circulation loop of the tail gas of engine-heat-condutive oil heat exchanger heating conduction oil；Heat conduction after heating
Oil heats by evaporator to high pressure organic working medium, high pressure organic working medium is changed into the superheated steam of HTHP；It is 2. high
The superheated steam of warm high pressure enters expansion work in expanding machine, and it is organic to become low pressure for the superheated steam of HTHP after expansion work
Working substance steam, low pressure organic working medium steam enter in regenerator after heat release, enter back into air-cooled condenser and be cooled to low-pressure liquid
Organic working medium, subsequently into being further cooled by LNG- organic working medium heat exchangers as low-pressure liquid organic working medium；3. low pressure
Liquid organic working medium is pressurized by organic working medium circulating pump, becomes high-pressure liquid organic working medium；4. high-pressure liquid organic working medium enters
Engine coolant-organic working medium preheater, absorb and enter in regenerator that to absorb low pressure organic after the heat of engine coolant
Temperature further improves after the heat of working substance steam, subsequently into organic refrigerant evaporator, is heated as the mistake of HTHP
Vapours, form organic Rankine cycle circuit；5. LNG fuel improves temperature by the air heat-exchange with entering air-cooled condenser
Simultaneously air themperature is reduced, enter heat exchange disk after the heat of organic working medium is then absorbed in LNG- organic working medium heat exchangers
In pipe, absorbing the heat of engine lubricating oil makes LNG temperature further improve, and finally sprays into engine and is burnt.
1. the conduction oil in tail gas-heat-condutive oil heat exchanger is heated to 300 ~ 350 DEG C to step, and in evaporator
The temperature of conduction oil is reduced to less than 150 DEG C；Step 3. pass through in oil-organic working medium separator and will mix by high-pressure liquid organic working medium
After the lubricating oil separation entered comes out, into engine coolant-organic working medium preheater.
The present invention rationally utilizes vehicle exhaust and coolant institute dispersed heat, effectively increases vehicle fuel warp
Ji property, reduces consumption of the automobile to fuel, while effectively reduces discharge, reduces the pollution to environment.In addition, LNG
Also containing has larger cold energy, and this part cold energy is also fully utilized by while engine exhaust heat is recycled, this be also with
LNG is that the automobile engine of fuel is maximum different from the waste heat recovery of conventional diesel engines.
Brief description of the drawings
Fig. 1 is the residual neat recovering system structural representation of LNG automobile engines of the present invention；
Fig. 2 is the structural representation of oil of the present invention-organic working medium separator.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not paid
Embodiment, belong to the scope of protection of the invention.
As depicted in figs. 1 and 2, a kind of residual neat recovering system for LNG automobile engines, including recovery motor exhaust
With organic rankine cycle system, the cold energy use of LNG fuel and the heating system of cooling fluid residual heat, described organic Rankine bottoming cycle system
System includes heat transfer oil circulation loop and organic working medium closed circuit, and described heat transfer oil circulation loop changes including tail gas-conduction oil
Hot device 28, heat conduction oil circulating pump 27 and evaporator 26, the conduction oil outlet of evaporator 26 by heat conduction oil circulating pump 27 and tail gas-
The heat conductive oil inlet of heat-condutive oil heat exchanger 28 is connected, the conduction oil outlet of tail gas-heat-condutive oil heat exchanger 28 and leading for evaporator 26
Hot oil inlet is connected；By conduction oil from the pump of evaporator 26 to tail gas-heat-condutive oil heat exchanger 28, conduction oil exists heat conduction oil circulating pump 27
The heat of motor exhaust is absorbed in tail gas-heat-condutive oil heat exchanger 28, after conduction oil is heated to 300 ~ 350 DEG C, then is being evaporated
High pressure organic working medium is heated in device 26, so that it becomes the superheated steam of HTHP, and the temperature of conduction oil drops in evaporator 26
It is pumped to again in tail gas-heat-condutive oil heat exchanger 28 after as little as less than 150 DEG C, forms heat transfer oil circulation loop.
Described organic working medium closed circuit includes expanding machine 21, regenerator 25, air-cooled condenser 13, LNG- organic working mediums
Heat exchanger 10, organic working medium circulating pump 8, oil-organic working medium separator 6, preheater 5, the organic working medium of described evaporator 26
Outlet is connected with the import of expanding machine 21, the outlet of expanding machine 21 passes sequentially through regenerator 25, air-cooled condenser 13, LNG- are organic
It is connected after working fluid heat exchanger 10, organic working medium circulating pump 8, regenerator 25 with the organic working medium import of evaporator 26.Described is swollen
Swollen machine 21 is rotary displacement expanding machine；It is connected with expanding machine 21 and is additionally provided with generator 20.The work(that expanding machine 21 exports can lead to
Cross generator 20 to generate electricity, can also be coupled with the dynamical system of automobile.
Superheated steam of the high pressure organic working medium in evaporator 26 by heat-conducting oil heating into HTHP organic working medium, high temperature
The superheated steam of high pressure organic working medium enters expansion work in expanding machine 21, drives generator 20 to generate electricity；The organic work of HTHP
The superheated steam of matter becomes low pressure organic working medium steam after expanding machine outflow, and the lubrication oil droplet being mixed with injection expanding machine；
After heat release, organic work of low-pressure liquid is cooled into air-cooled condenser 13 in regenerator 25 for low pressure organic working medium steam
Matter, subsequently into being further cooled by LNG- organic working mediums heat exchanger 10 as the organic work of low-pressure liquid with certain degree of supercooling
Matter；Low-pressure liquid organic working medium is pressurized by organic working medium circulating pump 8, becomes high-pressure liquid organic working medium.The organic work of high-pressure liquid
It is pre- into engine coolant-organic working medium after matter comes out mixed lubricating oil separation in oil-organic working medium separator 6
Hot device 5, enter in regenerator 25 temperature after the heat for absorbing low pressure organic working medium steam after absorbing the heat of engine coolant
Further improve, subsequently into organic refrigerant evaporator 26, be heated as the superheated steam of HTHP, form organic Rankine
Circulation loop.
The air themperature of air-cooled condenser 13 is lowered into heat exchange coil 10 using LNG cold energy and is increased in LNG-
The degree of supercooling of organic working medium in organic working medium heat exchanger 10.
Described LNG fuel cold energy use and heating system include storage tank 11, the preposition heat exchange coil of air-cooled condenser 13
12nd, LNG- organic working mediums heat exchanger 10, heat exchange coil 3 and engine 1, described storage tank 11 by pipeline successively with preposition heat exchange
Coil pipe 12, LNG- organic working mediums heat exchanger 10, heat exchange coil 3 are connected with engine 1.
Described heat exchange coil 3 is positioned in engine lubrication oil sump 2；It is placed on and is started using engine lubricating oil heating
The LNG fuel of flowing improves its temperature in the heat exchange coil 3 of machine lubricating oil bath 2.Low temperature LNG fuel flows out out of storage tank 11,
Flowed first in the heat exchange coil 12 for being placed on the air inlet of air-cooled condenser 13, pass through the sky with entering air-cooled condenser 13
Gas heat exchange causes air themperature to reduce while improving temperature, then absorbs organic working medium in LNG- organic working mediums heat exchanger 10
Heat after enter be positioned in the heat exchange coil 3 in engine lubrication oil sump 2, absorb the heat of engine lubricating oil so that
LNG temperature further improves, and finally sprays into engine 1 and is burnt.
The offgas outlet of described engine 1 is connected with tail gas-heat-condutive oil heat exchanger 28.The tail gas of engine enters tail
Conduction oil is heated in gas-heat-condutive oil heat exchanger 28.
The pipeline being connected with the organic working medium outlet of evaporator 26 is provided with the bypass 18 in parallel with expanding machine 21, described
Bypass 18 is provided with electromagnetic valve I 24, and the both ends of expanding machine 21 are provided with electromagnetic valve II 22 and electromagnetic valve II I19；It is in parallel with regenerator 25
Pipeline be provided with electromagnetic valve I V16, set respectively on the pipeline that the both ends of regenerator 25 are connected with expanding machine 21 and air-cooled condenser 13
There are magnetic valve V17 and magnetic valve VI15；Temperature sensor is additionally provided with the pipeline being connected with the organic working medium outlet of evaporator 26
23.In LNG engines 1, just startup, idle running or temperature sensor 23 detect that the organic working medium of outflow evaporator 26 is steamed
When vapour quality is not high, magnetic valve V17, magnetic valve VI15, electromagnetic valve II 22 and electromagnetic valve II I19 are closed, electromagnetic valve I V16 and electricity
Magnet valve I24 is opened, and organic working medium steam is directly entered air-cooled condenser 13 and condensed without expanding machine 21 and regenerator 25
It is changed into liquid organic working medium.
Oil-organic working medium separator 6 is additionally provided between described organic working medium circulating pump 8 and regenerator 25.Oily-organic
Separated the organic working medium of the lubricating oil in organic rankine cycle system and high-pressure liquid in working medium separator 6.
Described oil-organic working medium separator 6 includes housing 68, and the top of housing 68 is provided with import 62, bottom provided with organic
Sender property outlet 67, the side of housing 68 are provided with oil export 64, and the inside of housing 68 is provided with baffle plate 61 and filler plate 66, described baffle plate 61
The lower section of import 62 is arranged on, gap is left between the side of baffle plate 61 and the inwall of housing 68；Described filler plate 66 is inclined at
In housing 68；Described baffle plate 61 includes transverse slat 69 and swash plate 70, and transverse slat 69 and swash plate 70 form horizontal " V " template, and transverse slat 69 is right
Side is connected with the inwall of housing 68, gap is left between left side and the inwall of housing 68, the left side of swash plate 70 be connected with transverse slat 69 after to the right
Lower section extends.The effect of transverse slat 69 is the liquid organic working medium-oil mixture for guiding high pressure from import to housing side
Internal face flows, and its inwall along housing is flowed downwardly on filler plate 66, prevents that mixture velocity is too fast, influence lubricating oil
Separation, prevents liquid splash；Flowed again from filler plate eminence to lower, increase the disengaging time and separating area of lubricating oil, make
Obtain liquid organic working medium-oil mixture separation process more to relax, separation is more thorough.The setting of swash plate 70 prevents liquid
Organic working medium-oil mixture flow velocity is too fast to cause its liquid level to rise, and liquid accumulation, influences separating effect and efficiency.
Described filler plate 66 is tilted to the right with swash plate 70, and gap is left between the right-hand member of swash plate 70 and housing 68.
Lubricating oil after separation is accumulated upwards by the gap, and fluid level sensor 63 is arranged on the top of the minimum point of swash plate 70, works as profit
When lubricating oil reaches a certain height, fluid level sensor 63 detects that oil level is opened magnetic valve 65 and drained the oil.
Fluid level sensor 63 is additionally provided with the housing 68 of the described top of filler plate 66, the pipeline being connected with oil export 64
It is provided with magnetic valve 65.Liquid organic working medium-oil mixture of high pressure enters oil-organic working medium separator 6 from import 62
Interior, due to the presence of baffle plate 61, inwall of the organic working medium-oil mixture along oil-organic working medium separator 6 is downwards
Stream, flow velocity is reduced, play cushioning effect；For organic working medium-lubricating oil when flowing through 66 surface of filler plate, organic working medium passes through filler plate
66 then from the outflow of organic working medium outlet 67, and lubricating oil by filler plate 66, can not accumulate in the top of filler plate 66.Work as oil
Magnetic valve 65 is opened after liquid level sensor 63 detects oil level, and lubricating oil flows out from oil export 64.
Described filler plate 66 is superoleophobic plate of material；The inside pipe wall of described air-cooled condenser 13 is provided with superoleophobic painting
Layer.
A kind of exhaust heat recovering method for LNG automobile engine residual heat recovery systems, comprise the following steps：1. engine
Tail gas-heat-condutive oil heat exchanger 28 into heat transfer oil circulation loop of 1 tail gas heats conduction oil；Conduction oil is by steaming after heating
Hair device 26 heats to high pressure organic working medium, high pressure organic working medium is changed into the superheated steam of HTHP；2. HTHP
Superheated steam enter expansion work in expanding machine 21, the superheated steam of HTHP becomes low pressure organic working medium after expansion work
Steam, low pressure organic working medium steam enter in regenerator 25 after heat release, enter back into air-cooled condenser 13 and be cooled to low-pressure liquid
Organic working medium, subsequently into being further cooled by LNG- organic working mediums heat exchanger 10 as low-pressure liquid organic working medium；It is 3. low
Pressure liquid organic working medium is pressurized by organic working medium circulating pump 8, becomes high-pressure liquid organic working medium；4. high-pressure liquid organic working medium is entered
Enter engine coolant-organic working medium preheater 5, absorb to enter in regenerator 25 after the heat of engine coolant and absorb low pressure
Temperature further improves after the heat of organic working medium steam, subsequently into organic refrigerant evaporator 26, is heated as high temperature height
The superheated steam of pressure, form organic Rankine cycle circuit；5. LNG fuel is carried by the air heat-exchange with entering air-cooled condenser 13
While high-temperature air themperature is reduced, after the heat that organic working medium is then absorbed in LNG- organic working mediums heat exchanger 10
Into in heat exchange coil 3, absorbing the heat of engine lubricating oil makes LNG temperature further improve, and finally sprays into engine 1 and carries out
Burning.High pressure organic working medium is the organic working medium after the pressurization of organic working medium circulating pump.
1. the conduction oil in tail gas-heat-condutive oil heat exchanger 28 is heated to 300 ~ 350 DEG C to step, and in evaporator
The temperature of conduction oil is reduced to less than 150 DEG C in 26；3. high-pressure liquid organic working medium passes through oil-organic working medium separator 6 to step
It is middle by mixed lubricating oil separation come out after, into engine coolant-organic working medium preheater 5.
Claims (10)
- A kind of 1. residual neat recovering system for LNG automobile engines, it is characterised in that：Including recovery motor exhaust and cooling Organic rankine cycle system, the cold energy use of LNG fuel and the heating system of fluid residual heat, described organic rankine cycle system include Heat transfer oil circulation loop and organic working medium closed circuit, described heat transfer oil circulation loop include tail gas-heat-condutive oil heat exchanger （28）, heat conduction oil circulating pump（27）And evaporator（26）, evaporator（26）Conduction oil outlet pass through heat conduction oil circulating pump（27） With tail gas-heat-condutive oil heat exchanger（28）Heat conductive oil inlet be connected, tail gas-heat-condutive oil heat exchanger（28）Conduction oil outlet and steaming Send out device（26）Heat conductive oil inlet be connected；Described organic working medium closed circuit includes expanding machine（21）, regenerator（25）, air-cooled condenser（13）, the organic works of LNG- Matter heat exchanger（10）, organic working medium circulating pump（8）, oil-organic working medium separator（6）, preheater（5）, described evaporator （26）Organic working medium outlet and expanding machine（21）Import be connected, expanding machine（21）Outlet pass sequentially through regenerator（25）、 Air-cooled condenser（13）, LNG- organic working medium heat exchangers（10）, organic working medium circulating pump（8）, regenerator（25）Afterwards with evaporator （26）Organic working medium import be connected.
- 2. the residual neat recovering system according to claim 1 for LNG automobile engines, it is characterised in that：Described LNG Fuel cold energy use and heating system include storage tank（11）, air-cooled condenser（13）Preposition heat exchange coil（12）, LNG- it is organic Working fluid heat exchanger（10）, heat exchange coil（3）And engine（1）, described storage tank（11）By pipeline successively with preposition heat exchange disk Pipe（12）, LNG- organic working medium heat exchangers（10）, heat exchange coil（3）And engine（1）It is connected.
- 3. the residual neat recovering system according to claim 2 for LNG automobile engines, it is characterised in that：Described changes Hot coil（3）It is positioned over engine lubrication oil sump（2）It is interior.
- 4. the residual neat recovering system according to claim 2 for LNG automobile engines, it is characterised in that：Described hair Motivation（1）Offgas outlet and tail gas-heat-condutive oil heat exchanger（28）It is connected.
- 5. the residual neat recovering system according to claim 1 for LNG automobile engines, it is characterised in that：With evaporator （26）The connected pipeline in organic working medium outlet be provided with and expanding machine（21）Bypass in parallel（18）, described bypass（18）On Provided with electromagnetic valve I（24）, expanding machine（21）Both ends are provided with electromagnetic valve II（22）With electromagnetic valve II I（19）；With regenerator（25）And The pipeline of connection is provided with electromagnetic valve I V（16）, regenerator（25）Both ends and expanding machine（21）And air-cooled condenser（13）The pipe of connection Magnetic valve V is respectively equipped with road（17）With magnetic valve VI（15）；With evaporator（26）The connected pipeline in organic working medium outlet on It is additionally provided with temperature sensor（23）.
- 6. the residual neat recovering system according to claim 1 for LNG automobile engines, it is characterised in that：Described has Machine working medium circulating pump（8）And regenerator（25）Between be additionally provided with oil-organic working medium separator（6）.
- 7. the residual neat recovering system according to claim 6 for LNG automobile engines, it is characterised in that：Described oil- Organic working medium separator（6）Including housing（68）, housing（68）Top is provided with import（62）, bottom provided with organic working medium export （67）, housing（68）Side is provided with oil export（64）, housing（68）Inside is provided with baffle plate（61）And filler plate（66）, described gear Plate（61）It is arranged on import（62）Lower section, baffle plate（61）Side and housing（68）Gap is left between inwall；Described filler plate （66）It is inclined at housing（68）It is interior；Described baffle plate（61）Including transverse slat（69）And swash plate（70）, transverse slat（69）And swash plate （70）Horizontal " V " template of composition, transverse slat（69）Right side and housing（68）Inwall is connected, left side and housing（68）Left between inwall Gap, swash plate（70）Left side and transverse slat（69）Extend to the right after being connected.
- 8. the residual neat recovering system according to claim 7 for LNG automobile engines, it is characterised in that：Described fills out Flitch（66）The housing of top（68）Inside it is additionally provided with fluid level sensor（63）, with oil export（64）Connected pipeline is provided with electricity Magnet valve（65）；Described filler plate（66）For superoleophobic plate of material；Described air-cooled condenser（13）Inside pipe wall be provided with it is super Oleophobic coating.
- 9. the exhaust heat recovering method for LNG automobile engine residual heat recovery systems according to claim any one of 1-8, It is characterized in that comprise the following steps：1. engine（1）Tail gas the heat exchange of the tail gas into heat transfer oil circulation loop-conduction oil Device（28）Heat conduction oil；Conduction oil passes through evaporator after heating（26）High pressure organic working medium is heated, makes high pressure organic Working medium is changed into the superheated steam of HTHP；2. the superheated steam of HTHP enters expanding machine（21）Middle expansion work, expansion The superheated steam of HTHP becomes low pressure organic working medium steam after acting, and low pressure organic working medium steam enters regenerator（25）In After heat release, air-cooled condenser is entered back into（13）The organic working medium of low-pressure liquid is cooled to, is changed subsequently into LNG- organic working mediums Hot device（10）In be further cooled by as low-pressure liquid organic working medium；3. low-pressure liquid organic working medium is by organic working medium circulating pump （8）Supercharging, becomes high-pressure liquid organic working medium；4. high-pressure liquid organic working medium enters engine coolant-organic working medium preheating Device（5）, enter regenerator after absorbing the heat of engine coolant（25）Temperature after the middle heat for absorbing low pressure organic working medium steam Degree further improves, subsequently into organic refrigerant evaporator（26）, the superheated steam of HTHP is heated as, is formed organic Rankine cycle circuit；5. LNG fuel by with into air-cooled condenser（13）Air heat-exchange improve temperature while make to have leisure Temperature degree reduces, then in LNG- organic working medium heat exchangers（10）Enter heat exchange coil after the middle heat for absorbing organic working medium（3） Interior, absorbing the heat of engine lubricating oil makes LNG temperature further improve, and finally sprays into engine（1）Burnt.
- 10. the exhaust heat recovering method according to claim 9 for LNG automobile engine residual heat recovery systems, step is 1. It is described in tail gas-heat-condutive oil heat exchanger（28）Interior conduction oil is heated to 300 ~ 350 DEG C, and in evaporator（26）Middle conduction oil Temperature be reduced to less than 150 DEG C；3. high-pressure liquid organic working medium passes through oil-organic working medium separator to step（6）In will be mixed into Lubricating oil separation come out after, into engine coolant-organic working medium preheater（5）.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826686A (en) * | 2019-03-25 | 2019-05-31 | 深圳市奥宇节能技术股份有限公司 | Residual neat recovering system |
| CN110295959A (en) * | 2019-06-18 | 2019-10-01 | 一汽解放汽车有限公司 | A kind of Organic Rankine Cycle residual neat recovering system and starting control method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203824198U (en) * | 2014-02-20 | 2014-09-10 | 武汉三江航天远方科技有限公司 | Marine LNG (Liquefied Natural Gas) cold energy and flue gas waste heat comprehensive utilization system |
| CN105003328A (en) * | 2015-07-21 | 2015-10-28 | 同济大学 | Combined cooling and power system for recycling waste heat of automobile tail gas |
| DE102015012673A1 (en) * | 2015-09-30 | 2016-04-07 | Daimler Ag | Apparatus for waste heat recovery |
| CN106285896A (en) * | 2015-05-26 | 2017-01-04 | 金益翔（天津）新能源科技有限公司 | The LNG engine-cooling system of recyclable cold energy |
| CN207161223U (en) * | 2017-09-21 | 2018-03-30 | 郑州轻工业学院 | A kind of residual neat recovering system for LNG automobile engines |
-
2017
- 2017-09-21 CN CN201710858168.XA patent/CN107476897B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203824198U (en) * | 2014-02-20 | 2014-09-10 | 武汉三江航天远方科技有限公司 | Marine LNG (Liquefied Natural Gas) cold energy and flue gas waste heat comprehensive utilization system |
| CN106285896A (en) * | 2015-05-26 | 2017-01-04 | 金益翔（天津）新能源科技有限公司 | The LNG engine-cooling system of recyclable cold energy |
| CN105003328A (en) * | 2015-07-21 | 2015-10-28 | 同济大学 | Combined cooling and power system for recycling waste heat of automobile tail gas |
| DE102015012673A1 (en) * | 2015-09-30 | 2016-04-07 | Daimler Ag | Apparatus for waste heat recovery |
| CN207161223U (en) * | 2017-09-21 | 2018-03-30 | 郑州轻工业学院 | A kind of residual neat recovering system for LNG automobile engines |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826686A (en) * | 2019-03-25 | 2019-05-31 | 深圳市奥宇节能技术股份有限公司 | Residual neat recovering system |
| CN109826686B (en) * | 2019-03-25 | 2024-01-26 | 深圳市奥宇低碳技术股份有限公司 | Waste heat recovery system |
| CN110295959A (en) * | 2019-06-18 | 2019-10-01 | 一汽解放汽车有限公司 | A kind of Organic Rankine Cycle residual neat recovering system and starting control method |
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