CN209976660U - Waste heat recovery system of EGR engine - Google Patents
Waste heat recovery system of EGR engine Download PDFInfo
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- CN209976660U CN209976660U CN201920558865.8U CN201920558865U CN209976660U CN 209976660 U CN209976660 U CN 209976660U CN 201920558865 U CN201920558865 U CN 201920558865U CN 209976660 U CN209976660 U CN 209976660U
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- 239000002918 waste heat Substances 0.000 title claims abstract description 26
- 238000011084 recovery Methods 0.000 title claims abstract description 22
- 239000000498 cooling water Substances 0.000 claims abstract description 58
- 239000007789 gas Substances 0.000 claims abstract description 45
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 238000003860 storage Methods 0.000 claims abstract description 20
- 230000008676 import Effects 0.000 claims abstract description 5
- 239000003381 stabilizer Substances 0.000 claims description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 239000002699 waste material Substances 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
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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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- Exhaust-Gas Circulating Devices (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The utility model provides a waste heat recovery system of EGR engine, including the cooling water evaporimeter, the tail gas evaporimeter, the EGR evaporimeter, the cooling water evaporimeter, the tail gas evaporimeter, the working medium import of EGR evaporimeter is linked together through the export of a pipeline, No. two pipelines, No. three pipelines and liquid storage pot respectively, the import of liquid storage pot is linked together through the expander with the working medium export of cooling water evaporimeter, the tail gas evaporimeter, the EGR evaporimeter, and be provided with a control valve on a pipeline, No. two pipelines, No. three pipelines respectively, No. two control valves, No. three control valves. The design not only obviously improves the recovery efficiency of the waste heat of the engine, but also has simple structure and is beneficial to heat management.
Description
Technical Field
The utility model belongs to the internal-combustion engine waste heat recovery field, concretely relates to EGR engine waste heat recovery system is applicable to the thermal efficiency that improves the engine.
Background
With the increase of the automobile holding capacity, the energy consumed by the automobile is also increased continuously. At present, the combustion efficiency of the automobile engine reaches a high level, but the effective thermal efficiency is less than 50%, total energy of fuel close to 1/3 is lost through energy of exhaust gas, and about 20% or more of total energy of fuel enters a cooling system. If the part of waste heat can be recycled through an effective way, the method has an important effect on improving the utilization rate of the fuel oil of the automobile.
At present, methods for utilizing waste heat of an engine include energy storage technology, turbo compounding, turbo power generation, thermoelectric power generation, rankine cycle, thermoelectric technology, brayton cycle, and the like. Among them, the recovery method using the organic rankine cycle is a method having the highest efficiency, which can realize the stepwise utilization of energy without affecting the post-treatment.
Chinese patent: the invention patent of application publication No. CN108374714A discloses an organic Rankine cycle air inlet and pressurization internal combustion gas system and method, which respectively absorb the heat of compressed air, the heat of cooling liquid and the waste heat of engine tail gas in an intercooler, a preheater and an evaporator in sequence to generate saturated steam or superheated steam, the saturated steam or the superheated steam enters an expander to do work, a generator is driven to generate power, and meanwhile, power is provided for an air compressor of an internal combustion engine for air inlet and pressurization. This system has the following drawbacks:
1. the system only recovers the waste heat of exhaust gas and cooling water, and the energy utilization rate is limited;
2. the system replaces the traditional turbine with an expander, and the expander cannot be coaxial with the compressor, so the compressor needs to be customized;
3. the whole system is complex in arrangement and needs to carry out power distribution control on the generator and the compressor.
Disclosure of Invention
The utility model discloses to the above-mentioned problem that prior art exists, provide a EGR engine waste heat recovery system that can furthest's recovery engine's waste heat and simple structure.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
an EGR engine waste heat recovery system comprises an engine, a cooling water evaporator, a tail gas evaporator, a liquid storage tank and a working medium pump, wherein a cooling water inlet and a cooling water outlet of the cooling water evaporator are respectively communicated with a cooling water outlet and a cooling water inlet of the engine, a tail gas inlet and a tail gas outlet of the tail gas evaporator are respectively communicated with an exhaust port and the atmosphere of the engine, working medium inlets of the cooling water evaporator and the tail gas evaporator are respectively communicated with an outlet of the working medium pump through a first pipeline and a second pipeline, and an inlet of the working medium pump is communicated with the working medium outlets of the cooling water evaporator and the tail gas evaporator sequentially through the liquid storage tank and an expansion machine with a power output device;
the system further comprises an EGR evaporator and an EGR mixer, an EGR inlet of the EGR evaporator is communicated with an exhaust port of the engine, an EGR outlet of the EGR evaporator is communicated with an air inlet of the engine through the EGR mixer, a working medium inlet of the EGR evaporator is communicated with an outlet of the working medium pump through a third pipeline, a working medium outlet of the EGR evaporator is communicated with the expansion machine, a first control valve, a second control valve and a third control valve are respectively arranged on the first pipeline, the second pipeline and the third pipeline, and the first control valve, the second control valve and the third control valve are all electrically connected with the ECU.
The system also comprises a heat regenerator, wherein a first inlet of the heat regenerator is communicated with an outlet of the working medium pump, a first outlet of the heat regenerator is communicated with the first pipeline, the second pipeline and the third pipeline, and a second inlet and a second outlet of the heat regenerator are respectively communicated with the expander and the liquid storage tank.
And a second outlet of the heat regenerator is communicated with the liquid storage tank through a condenser.
And a cooling water outlet of the cooling water evaporator is communicated with a cooling water inlet of the engine through a cooling water pump, and a tail gas inlet of the tail gas evaporator is communicated with an exhaust port of the engine through a post-treatment device.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model relates to an EGR engine waste heat recovery system, which comprises an EGR evaporator, an EGR inlet of the EGR evaporator is communicated with an exhaust port of an engine, an EGR outlet is communicated with an air inlet of the engine through an EGR mixer, a working medium inlet is communicated with an outlet of a working medium pump through a third pipeline, the working medium outlet is communicated with an expander, the first pipeline, the second pipeline and the third pipeline are respectively provided with a first control valve, a second control valve and a third control valve which are electrically connected with an ECU, the system realizes the effective recovery of cooling water, tail gas and EGR waste heat on one hand by arranging three independent and mutually unaffected runners, the heat energy recovered by the three runners is converged in front of the expander, and the expander of the system is shared, on the other hand, the structure only needs to be based on the original engine arrangement structure, replace engine cooling water tank for the cooling water evaporimeter, replace engine EGR intercooler for the EGR evaporimeter, add the tail gas evaporimeter after the aftertreatment system can, simple structure not only does not influence the original structure of engine moreover. Therefore, the utility model discloses not only showing the recovery efficiency who has improved the engine waste heat, simple structure moreover, do not influence the original structure of engine.
2. The utility model relates to a waste heat recovery system of EGR engine still includes the regenerator, the regenerator is the double-channel structure, its first import is linked together with the export of working medium pump, first export and pipeline, No. two pipelines, No. three pipelines are linked together, the second advances, the export is linked together with expander, liquid storage pot respectively, this structure makes the thermal technology who comes from the expander and can carry out the heat exchange with the cold working medium that flows by the liquid storage pot to realized that the working medium remains thermal effective recovery, further improved the utilization ratio of engine waste heat. Therefore, the utility model discloses the utilization ratio of engine waste heat has further been improved.
Drawings
Fig. 1 is a schematic structural diagram of the system of the present invention.
In the figure, an engine 1, a cooling water evaporator 2, a first pipeline 21, a first control valve 22, an exhaust gas evaporator 3, a second pipeline 31, a second control valve 32, a cooling water pump 4, an EGR evaporator 5, a third pipeline 51, a third control valve 52, an expander 6, a liquid storage tank 7, a working medium pump 8, an EGR mixer 9, an ECU10, a heat regenerator 20, a voltage stabilizer 30, a condenser 40 and an aftertreatment device 50.
Detailed Description
The present invention will be described in further detail with reference to the following description and embodiments in conjunction with the accompanying drawings.
Referring to fig. 1, an EGR engine waste heat recovery system comprises an engine 1, a cooling water evaporator 2, a tail gas evaporator 3, a liquid storage tank 7 and a working medium pump 8, wherein a cooling water inlet and a cooling water outlet of the cooling water evaporator 2 are respectively communicated with a cooling water outlet and a cooling water inlet of the engine 1, a tail gas inlet and a tail gas outlet of the tail gas evaporator 3 are respectively communicated with an exhaust port and the atmosphere of the engine 1, working medium inlets of the cooling water evaporator 2 and the tail gas evaporator 3 are respectively communicated with an outlet of the working medium pump 8 through a first pipeline 21 and a second pipeline 31, and an inlet of the working medium pump 8 is communicated with working medium outlets of the cooling water evaporator 2 and the tail gas evaporator 3 sequentially through the liquid storage tank 7 and an expander 6 with a power output device;
the system further comprises an EGR evaporator 5 and an EGR mixer 9, an EGR inlet of the EGR evaporator 5 is communicated with an exhaust port of the engine 1, an EGR outlet of the EGR evaporator 5 is communicated with an air inlet of the engine 1 through the EGR mixer 9, a working medium inlet of the EGR evaporator 5 is communicated with an outlet of the working medium pump 8 through a third pipeline 51, a working medium outlet of the EGR evaporator 5 is communicated with the expansion machine 6, a first pipeline 21, a second pipeline 31 and a third pipeline 51 are respectively provided with a first control valve 22, a second control valve 32 and a third control valve 52, and the first control valve 22, the second control valve 32 and the third control valve 52 are all electrically connected with the ECU 10.
The system further comprises a heat regenerator 20, wherein a first inlet of the heat regenerator 20 is communicated with an outlet of the working medium pump 8, a first outlet of the heat regenerator 20 is communicated with the first pipeline 21, the second pipeline 31 and the third pipeline 51, and a second inlet and a second outlet of the heat regenerator 20 are respectively communicated with the expander 6 and the liquid storage tank 7.
The first outlet of the heat regenerator 20 is communicated with the first pipeline 21, the second pipeline 31 and the third pipeline 51 through a voltage stabilizer 30, and the second outlet of the heat regenerator 20 is communicated with the liquid storage tank 7 through a condenser 40.
The cooling water outlet of the cooling water evaporator 2 is communicated with the cooling water inlet of the engine 1 through a cooling water pump 4, and the tail gas inlet of the tail gas evaporator 3 is communicated with the exhaust port of the engine 1 through an aftertreatment device 50.
The EGR engine waste heat recovery system is controlled by adopting the following method:
when the ECU10 monitors that the vehicle is in a cold start working condition, the first control valve 22, the second control valve 32 and the third control valve 52 are controlled to be closed;
when the ECU10 monitors that the vehicle is in a stable working condition or a variable working condition, the ECU10 calculates to obtain waste cooling water heat energy according to the collected cooling water flow and the cooling water inlet and outlet temperature data of the cooling water evaporator 2, calculates to obtain waste tail gas heat energy according to the collected tail gas flow and the tail gas inlet and outlet temperature data of the tail gas evaporator 3, calculates to obtain waste EGR heat energy according to the collected EGR flow and the EGR inlet and outlet temperature data of the EGR evaporator 5, and then controls the opening degrees of the first control valve 22, the second control valve 32 and the third control valve 52 according to the waste cooling water heat energy, the waste tail gas heat energy and the waste EGR heat energy data.
The principle of the utility model is explained as follows:
stable operating mode is the operating mode that the vehicle moved at a fixed engine speed and fixed load, it is the operating mode that the vehicle brakies etc. and makes engine speed or load change to become the operating mode that the operating mode is said.
Example 1:
referring to fig. 1, an EGR engine waste heat recovery system comprises an engine 1, a cooling water evaporator 2, a tail gas evaporator 3, an EGR evaporator 5, a liquid storage tank 7, a working medium pump 8, an EGR mixer 9, and a heat regenerator 20, wherein a cooling water inlet of the cooling water evaporator 2 is communicated with a cooling water outlet of the engine 1, the cooling water outlet of the cooling water evaporator 2 is communicated with the cooling water inlet of the engine 1 through a cooling water pump 4, a tail gas inlet of the tail gas evaporator 3 is communicated with an exhaust port of the engine 1 through a post-treatment device 50, a tail gas outlet of the tail gas evaporator 3 is communicated with the atmosphere, an EGR inlet of the EGR evaporator 5 is communicated with an exhaust port of the engine 1, an EGR outlet of the EGR evaporator 5 is communicated with an air inlet of the engine 1 through the EGR mixer 9, working medium inlets of the cooling water evaporator 2, the tail gas evaporator 3, and the EGR evaporator 5 are respectively communicated with a first pipeline 21, The second pipeline 31 and the third pipeline 51 are communicated with an outlet of the voltage stabilizer 30, an inlet of the voltage stabilizer 30 is communicated with an outlet of the liquid storage tank 7 sequentially through a first outlet of the heat regenerator 20, a first inlet of the heat regenerator 20 and the working medium pump 8, an inlet of the liquid storage tank 7 is communicated with working medium outlets of the cooling water evaporator 2, the tail gas evaporator 3 and the EGR evaporator 5 sequentially through the condenser 40, a second outlet of the heat regenerator 20, a second inlet of the heat regenerator 20 and the expander 6, the first pipeline 21, the second pipeline 31 and the third pipeline 51 are respectively provided with a first control valve 22, a second control valve 32 and a third control valve 52, and the first control valve 22, the second control valve 32 and the third control valve 52 are electrically connected with the ECU 10.
Claims (4)
1. An EGR engine waste heat recovery system comprises an engine (1), a cooling water evaporator (2), a tail gas evaporator (3), a liquid storage tank (7) and a working medium pump (8), the cooling water inlet and outlet of the cooling water evaporator (2) are respectively communicated with the cooling water outlet and inlet of the engine (1), the tail gas of tail gas evaporimeter (3) advances, the export is linked together with the gas vent of engine (1), the atmosphere respectively, cooling water evaporimeter (2), the working medium import of tail gas evaporimeter (3) is respectively through a pipeline (21), No. two pipelines (31) are linked together with the export of working medium pump (8), the import of working medium pump (8) loops through liquid storage pot (7), expander (6) and cooling water evaporimeter (2) that have power take off, the working medium export of tail gas evaporimeter (3) is linked together, its characterized in that:
the system further comprises an EGR evaporator (5) and an EGR mixer (9), an EGR inlet of the EGR evaporator (5) is communicated with an exhaust port of the engine (1), an EGR outlet of the EGR evaporator (5) is communicated with an air inlet of the engine (1) through the EGR mixer (9), a working medium inlet of the EGR evaporator (5) is communicated with an outlet of the working medium pump (8) through a third pipeline (51), a working medium outlet of the EGR evaporator (5) is communicated with the expansion machine (6), a first pipeline (21), a second pipeline (31) and a third pipeline (51) are respectively provided with a first control valve (22), a second control valve (32) and a third control valve (52), and the first control valve (22), the second control valve (32) and the third control valve (52) are all electrically connected with the ECU (10).
2. The EGR engine waste heat recovery system according to claim 1, wherein: the system further comprises a heat regenerator (20), a first inlet of the heat regenerator (20) is communicated with an outlet of the working medium pump (8), a first outlet of the heat regenerator (20) is communicated with the first pipeline (21), the second pipeline (31) and the third pipeline (51), and a second inlet and a second outlet of the heat regenerator (20) are respectively communicated with the expander (6) and the liquid storage tank (7).
3. The EGR engine waste heat recovery system according to claim 2, wherein: a first outlet of the heat regenerator (20) is communicated with a first pipeline (21), a second pipeline (31) and a third pipeline (51) through a voltage stabilizer (30), and a second outlet of the heat regenerator (20) is communicated with the liquid storage tank (7) through a condenser (40).
4. An EGR engine waste heat recovery system according to claim 1 or 2, characterized in that: and a cooling water outlet of the cooling water evaporator (2) is communicated with a cooling water inlet of the engine (1) through a cooling water pump (4), and a tail gas inlet of the tail gas evaporator (3) is communicated with an exhaust port of the engine (1) through an aftertreatment device (50).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920558865.8U CN209976660U (en) | 2019-04-23 | 2019-04-23 | Waste heat recovery system of EGR engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920558865.8U CN209976660U (en) | 2019-04-23 | 2019-04-23 | Waste heat recovery system of EGR engine |
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| CN209976660U true CN209976660U (en) | 2020-01-21 |
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| CN201920558865.8U Active CN209976660U (en) | 2019-04-23 | 2019-04-23 | Waste heat recovery system of EGR engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110056448A (en) * | 2019-04-23 | 2019-07-26 | 东风商用车有限公司 | A kind of EGR engine Waste Heat Recovery System and its control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110056448A (en) * | 2019-04-23 | 2019-07-26 | 东风商用车有限公司 | A kind of EGR engine Waste Heat Recovery System and its control method |
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