CN103696837A - Exhaust waste heat recycling system for internal combustion engine - Google Patents
Exhaust waste heat recycling system for internal combustion engine Download PDFInfo
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- CN103696837A CN103696837A CN201310732051.9A CN201310732051A CN103696837A CN 103696837 A CN103696837 A CN 103696837A CN 201310732051 A CN201310732051 A CN 201310732051A CN 103696837 A CN103696837 A CN 103696837A
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- exhaust passage
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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 an exhaust waste heat recycling system for an internal combustion engine. The exhaust waste heat recycling system comprises a thermoelectric conversion module, cooling liquid channels and a storage battery. The thermoelectric conversion module wraps the outside of an exhaust channel, the cooling liquid channels warp the outside of the thermoelectric conversion module, the storage battery can be charged by the thermoelectric conversion module, and an exhaust distribution channel is arranged at an exhaust port of the internal combustion engine and is connected with the exhaust channel via gas filling channels; a first throttle valve is arranged at an inlet of the exhaust channel, and second throttle valves are arranged on the gas filling channels. The exhaust waste heat recycling system has the advantages that high-temperature tail gas sections exhausted from the internal combustion engine are guided into the exhaust channel via the exhaust distribution channel and the gas filling channels, so that the uniformity of the temperature of the tail gas in the exhaust channel can be improved, the thermoelectric conversion efficiency of the thermoelectric conversion module can be improved, and the exhaust waste heat recycling system is simple in structure and convenient to arrange.
Description
Technical field
The present invention relates to a kind of waste heat recycling system, particularly a kind of waste heat recycling system that utilizes thermoelectric generation technology to reclaim exhaust heat of internal combustion engine.
Background technique
Along with the increase of automobile quantity, the energy of vehicle consumption grows with each passing day, vehicle energy-conservation also more and more concerned.Yet with existing internal combustion engine operation index evaluation, in fuel oil, the energy of 60% left and right is not utilized effectively, the overwhelming majority is discharged in atmosphere with the form of waste heat, has caused huge economic loss and serious environmental pollution.Therefore, utilizing engine exhaust to carry out thermoelectricity conversion is a good energy-saving and emission-reduction approach.Since 20 century 70s, the scholar of some industrially developed country has proposed employing thermoelectric generator (thermoelectric generator, TEG) exhaust heat of motor has been carried out to the mode that thermoelectricity conversion is used.Thermoelectric generator is to utilize Seebeck effect, heat energy is directly changed into a kind of power generating device of electric energy.So-called Seebeck effect is that the mutual close contact in the two ends of the conductor of unlike material (or semiconductor) A and B is formed to loop, if keep different temperatures T in two connection places
1with T
2, will be because temperature difference produces thermo electromotive force in loop.In general the efficiency of thermoelectric generator is mainly determined by the temperature difference of constouctional material and high low-temperature end, for reaching good working condition, material used must have relatively high Seebeck coefficient and conductivity, lower thermal conductivity, these three indexs cannot reach in common material simultaneously, therefore need the physical parameter variation with temperature relation of research material, thereby further study the relation between best power generation performance and cold hot-side temperature, select suitable operating temperature to make power generating device bring into play in maximum efficiency its effect.In fact, various thermoelectric materials have optimum working temperature separately interval, make thermoelectric generator can bring into play optimum performance, its operating temperature are controlled to its optimum working temperature interval very necessary.
Refer to Fig. 1～Fig. 3, the existing waste heat recycling system that utilizes thermoelectric generation technology to reclaim exhaust heat of internal combustion engine, thermo-electric conversion module 1 is wrapped in outside exhaust passage 2, outside thermo-electric conversion module 1, use water quench, the thermo-electric conversion module 1 inside and outside temperature difference makes it to produce electromotive force, is charge in batteries.The tail gas of exhaust passage 2 enters preprocessor 5.Said system is chosen the thermo-electric converting material for thermo-electric conversion module according to the exhaust temperature of internal combustion engine air vent.The direction flowing out along tail gas due to the temperature difference on thermo-electric conversion module 1 reduces gradually, therefore the temperature difference of utilizing away from the thermo-electric conversion module part of internal combustion engine air vent is less, cause like this conversion efficiency that is attached to the thermo-electric converting material on exhaust passage to reduce gradually along tail gas stream outgoing direction, finally cause the conversion efficiency of thermoelectric of system lower.
Summary of the invention
The present invention provides a kind of exhaust heat of internal combustion engine recycling system that can improve heat recovery efficiency for solving the technical problem existing in known technology.
The technological scheme that the present invention takes for the technical problem existing in solution known technology is: a kind of exhaust heat of internal combustion engine recycling system, comprise the thermo-electric conversion module that is wrapped in outside exhaust passage, be wrapped in cooling channels and storage battery outside described thermo-electric conversion module, described thermo-electric conversion module is charge in batteries, exhaust ports at described internal-combustion engine is provided with bypassing exhaust passage, and described bypassing exhaust passage is connected with described exhaust passage by aerating passage; In the ingress of described exhaust passage, be provided with first throttle valve, on described aerating passage, be provided with the second throttle valve.
Described aerating passage has one, and the air outlet of this aerating passage is connected to the place, neutral position of the length direction of described exhaust passage.
Described aerating passage has a plurality of of parallel connection, and the air outlet of all described aerating passages is distributed on described exhaust passage along the length direction of described exhaust passage.
At described bypassing exhaust passage and described aerating passage, be wrapped with thermal insulation layer.
Advantage and good effect that the present invention has are: by adopting bypassing exhaust passage and aerating passage that the high-temperature tail gas segmentation that goes out internal-combustion engine is introduced to exhaust passage, to improve the uniformity coefficient of exhaust passage inner exhaust gas temperature, and then improve the conversion efficiency of thermoelectric of thermo-electric conversion module.And the present invention is simple in structure, convenient layout.
Accompanying drawing explanation
Fig. 1 is the structural representation of background technique of the present invention;
Fig. 2 is the plan view of Fig. 1;
Fig. 3 is for adopting the high low-temperature end temperature difference of waste heat recycling system thermo-electric conversion module of structure shown in Fig. 1 with exhaust gas flow direction variation diagram;
Fig. 4 is the structural representation of embodiments of the invention 1;
Fig. 5 is the plan view of Fig. 4;
Fig. 6 is that the high low-temperature end temperature difference of embodiments of the invention 1 thermo-electric conversion module is with exhaust gas flow direction variation diagram;
Fig. 7 is the structural representation of embodiments of the invention 2;
Fig. 8 is the plan view of Fig. 7;
Fig. 9 is that the high low-temperature end temperature difference of embodiments of the invention 2 thermo-electric conversion module is with exhaust gas flow direction variation diagram.
In figure: 1, thermo-electric conversion module; 2, exhaust passage; 3, cooling channels, 4, internal-combustion engine; 5, preprocessor; 6, storage battery; 7, first throttle valve; 8 second throttle valve; 9, bypassing exhaust passage; 10, aerating passage.
Embodiment
For further understanding summary of the invention of the present invention, Characteristic, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
Refer to Fig. 1～Fig. 9, a kind of exhaust heat of internal combustion engine recycling system, comprise the thermo-electric conversion module 1 that is wrapped in outside exhaust passage 2, be wrapped in cooling channels 3 and storage battery 6 outside described thermo-electric conversion module 1, described thermo-electric conversion module 1 is storage battery 6 chargings, exhaust ports at described internal-combustion engine 4 is provided with bypassing exhaust passage 9, and described bypassing exhaust passage 9 is connected with described exhaust passage 2 by aerating path 10; In the ingress of described exhaust passage 2, be provided with first throttle valve 7, on described aerating path 10, be provided with the second throttle valve 8.
The present invention, by part high-temperature tail gas being introduced to the rear region of leaning on of exhaust passage entrance, to improve the temperature homogeneity in exhaust passage, and then has reached the object that improves heat recovery and motor fuel utilization ratio.
Embodiment 1:
Refer to Fig. 4～Fig. 6, above-mentioned aerating path 10 has one, and the air outlet of this aerating path 10 is connected to the place, neutral position of the length direction of described exhaust passage 2.
The air outlet of aerating path 10 is arranged on the middle part of the length direction of exhaust passage 2, exhaust passage 2 is wrapped up by thermo-electric conversion module 1, thermo-electric conversion module 1 outside is cooling with cooling fluid, and the temperature difference of thermo-electric conversion module 1 inside and outside both sides makes it to produce electromotive force, is storage battery 6 chargings.The tail gas that internal-combustion engine is discharged is through shunting, a part enters aerating path 10, the exhaust flow regulating in aerating path 10 by the second throttle valve 8, exhaust passage 2 inside temperatures are changed to be reduced, import and export also corresponding reduction of the temperature difference, can effectively improve the generating efficiency that is positioned near the thermoelectric conversion module of outlet section.
Embodiment 2:
Refer to Fig. 7～Fig. 9, above-mentioned aerating path 10 has a plurality of of parallel connection, and the air outlet of all described aerating path 10s is distributed on described exhaust passage 2 along the length direction of described exhaust passage 2.
Owing to reducing gradually along discharge directions temperature in exhaust passage, embodiments of the invention 2 adopt piecemeal part high-temperature tail gas are introduced in exhaust passage, coordinate the throttle valve on each passage to regulate each several part aerating ratio simultaneously, make exhaust passage inner exhaust gas temperature more even, reach unanimity.
Waste heat recycling system as described in Example 1, on exhaust passage, add one and add gas port, exhaust temperature uniformity in exhaust passage is not very good conventionally, for this reason, and in embodiment 2, on exhaust passage, add 3 and added gas port, the tail gas splitter section that internal-combustion engine is discharged enters each aerating passage, adopts the second throttle valve adjustment to enter 3 tail gas ratios that add gas port, can make exhaust passage inner exhaust gas temperature be tending towards more even, thereby, further improve the generating efficiency of thermo-electric conversion module.
The quantity that the adds gas port namely quantity of aerating passage can be determined according to the relevant parameters of the length of exhaust passage and cooling fluid, is not defined as 3, can be more, such as 4 or 5 etc., in theory, the quantity that adds gas port is more, and the exhaust temperature uniformity in exhaust passage is better.
In embodiment 1 and embodiment 2, at described bypassing exhaust passage and described aerating passage, be all enclosed with thermal insulation layer outward.
The present invention adopts the structure of exhaust passage subsection-inlet, by thermo-electric converting material, the heat energy in I. C. engine exhaust is converted to electric energy efficiently, the high-temperature gas that internal-combustion engine is discharged is partly shunted, splitter section by aerating passage and on throttle valve flow into adjustably exhaust passage, to improve the temperature homogeneity in exhaust passage, and then the temperature homogeneity of raising thermo-electric conversion module temperature end, the conversion efficiency of thermoelectric of raising thermo-electric conversion module.
Although by reference to the accompanying drawings the preferred embodiments of the present invention are described above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not departing from the scope situation that aim of the present invention and claim protect, can also make a lot of forms, within these all belong to protection scope of the present invention.
Claims (4)
1. an exhaust heat of internal combustion engine recycling system, comprise the thermo-electric conversion module that is wrapped in outside exhaust passage, be wrapped in cooling channels and storage battery outside described thermo-electric conversion module, described thermo-electric conversion module is charge in batteries, it is characterized in that, exhaust ports at described internal-combustion engine is provided with bypassing exhaust passage, and described bypassing exhaust passage is connected with described exhaust passage by aerating passage; In the ingress of described exhaust passage, be provided with first throttle valve, on described aerating passage, be provided with the second throttle valve.
2. exhaust heat of internal combustion engine recycling system according to claim 1, is characterized in that, described aerating passage has one, and the air outlet of this aerating passage is connected to the place, neutral position of the length direction of described exhaust passage.
3. exhaust heat of internal combustion engine recycling system according to claim 1, is characterized in that, described aerating passage has a plurality of of parallel connection, and the air outlet of all described aerating passages is distributed on described exhaust passage along the length direction of described exhaust passage.
4. exhaust heat of internal combustion engine recycling system according to claim 1, is characterized in that, at described bypassing exhaust passage and described aerating passage, is wrapped with thermal insulation layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310732051.9A CN103696837A (en) | 2013-12-23 | 2013-12-23 | Exhaust waste heat recycling system for internal combustion engine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310732051.9A CN103696837A (en) | 2013-12-23 | 2013-12-23 | Exhaust waste heat recycling system for internal combustion engine |
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| CN103696837A true CN103696837A (en) | 2014-04-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050374A (en) * | 2016-06-27 | 2016-10-26 | 湖南大学 | Device for regulating thermoelectric generation power matched load in real time by changing heat transfer areas |
| CN113404579A (en) * | 2020-11-18 | 2021-09-17 | 哈尔滨工业大学（威海） | Composite exhaust silencer for motor vehicle |
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| CN201623673U (en) * | 2010-01-25 | 2010-11-03 | 武汉理工大学 | Generating set utilizing automobile exhaust waste heat temperature difference |
| CN102066708A (en) * | 2008-05-16 | 2011-05-18 | 排放技术有限公司 | Device for producing electrical energy from exhaust gas heat |
| CN102245871A (en) * | 2008-12-17 | 2011-11-16 | 排放技术有限公司 | Device for producing electrical energy from exhaust gas |
| JP2012107599A (en) * | 2010-11-19 | 2012-06-07 | Toyota Industries Corp | Exhaust heat recovery device |
| CN103133099A (en) * | 2013-03-08 | 2013-06-05 | 天津大学 | Shunting internal combustion engine exhaust waste heat recycling system |
| CN203640811U (en) * | 2013-12-23 | 2014-06-11 | 天津大学 | Exhausted gas waste heat recycling system of internal combustion engine |
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2013
- 2013-12-23 CN CN201310732051.9A patent/CN103696837A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102066708A (en) * | 2008-05-16 | 2011-05-18 | 排放技术有限公司 | Device for producing electrical energy from exhaust gas heat |
| CN102245871A (en) * | 2008-12-17 | 2011-11-16 | 排放技术有限公司 | Device for producing electrical energy from exhaust gas |
| CN201623673U (en) * | 2010-01-25 | 2010-11-03 | 武汉理工大学 | Generating set utilizing automobile exhaust waste heat temperature difference |
| JP2012107599A (en) * | 2010-11-19 | 2012-06-07 | Toyota Industries Corp | Exhaust heat recovery device |
| CN103133099A (en) * | 2013-03-08 | 2013-06-05 | 天津大学 | Shunting internal combustion engine exhaust waste heat recycling system |
| CN203640811U (en) * | 2013-12-23 | 2014-06-11 | 天津大学 | Exhausted gas waste heat recycling system of internal combustion engine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050374A (en) * | 2016-06-27 | 2016-10-26 | 湖南大学 | Device for regulating thermoelectric generation power matched load in real time by changing heat transfer areas |
| CN106050374B (en) * | 2016-06-27 | 2018-05-25 | 湖南大学 | A kind of variable heat transfer area adjusts the device of thermo-electric generation power match load in real time |
| CN113404579A (en) * | 2020-11-18 | 2021-09-17 | 哈尔滨工业大学（威海） | Composite exhaust silencer for motor vehicle |
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