WO2006030888A1 - 排熱回収装置 - Google Patents
排熱回収装置 Download PDFInfo
- Publication number
- WO2006030888A1 WO2006030888A1 PCT/JP2005/017122 JP2005017122W WO2006030888A1 WO 2006030888 A1 WO2006030888 A1 WO 2006030888A1 JP 2005017122 W JP2005017122 W JP 2005017122W WO 2006030888 A1 WO2006030888 A1 WO 2006030888A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- exhaust
- exhaust heat
- cooling water
- internal combustion
- combustion engine
- Prior art date
Links
- 238000011084 recovery Methods 0.000 title claims abstract description 26
- 238000002485 combustion reaction Methods 0.000 claims abstract description 39
- 239000000498 cooling water Substances 0.000 claims abstract description 39
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 239000007789 gas Substances 0.000 description 24
- 239000011810 insulating material Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 229910002909 Bi-Te Inorganic materials 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- 230000005678 Seebeck effect Effects 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/20—Cooling circuits not specific to a single part of engine or machine
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/23—Layout, e.g. schematics
- F02M26/28—Layout, e.g. schematics with liquid-cooled heat exchangers
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2060/00—Cooling circuits using auxiliaries
- F01P2060/16—Outlet manifold
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
-
- 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
Definitions
- the present invention relates to an exhaust heat recovery apparatus.
- Patent Document 1 discloses an example of an exhaust gas force of an internal combustion engine that recovers exhaust heat by a thermoelectric module to generate electric power.
- thermoelectric elements are attached to an outer portion of an engine exhaust hold and an outer portion of a catalyst case.
- Patent Document 1 Japanese Patent Application Laid-Open No. 11-257064
- the present invention has an object to provide an exhaust heat recovery device that can further recover exhaust heat and generate power by expanding the applicable range. It is a thing.
- the exhaust heat recovery device of the present invention includes a pipe for supplying cooling water that has become high temperature by cooling an internal combustion engine to a radiator, and cooling that has become high temperature by cooling Z or EGR gas.
- a thermoelectric module is attached to a pipe that feeds water to a radiator.
- the exhaust heat recovery apparatus of the present invention has an exhaust manifold into which exhaust gas such as internal combustion engine power is introduced and at least a part of cooling water for cooling the internal combustion engine circulates.
- a thermoelectric module is mounted between the casing and the casing.
- the exhaust heat recovery apparatus of the present invention includes an exhaust port through which exhaust gas from an internal combustion engine, etc. flows.
- a thermoelectric module is mounted between the cooling water flow path of the internal combustion engine.
- thermoelectric module has a p-type thermoelectric element and an n-type thermoelectric element electrically connected in series.
- the exhaust heat recovery apparatus of the present invention it is possible to recover the thermal energy that has been thrown away into the cooling water as electric power, and therefore, it is possible to expand the application range of the thermoelectric module, and accordingly, compared with the conventional case. Exhaust heat can be recovered more effectively, and thermal energy can be recovered as electric power from the exhaust gas of the internal combustion engine by the thermoelectric module, so that the application range of the thermoelectric module can be expanded. Therefore, in this case as well, an excellent effect that exhaust heat can be recovered more effectively than before can be achieved.
- FIG. 1 is a conceptual diagram of a first embodiment of an exhaust heat recovery apparatus of the present invention.
- thermoelectric module 2 is a cross-sectional view of a thermoelectric module applied to the exhaust heat recovery apparatus of FIG.
- FIG. 3 is a conceptual diagram of a second embodiment of the exhaust heat recovery apparatus of the present invention.
- FIG. 4 is a view taken in the direction of arrows IV-IV in FIG.
- FIG. 5 is a conceptual diagram of a third embodiment of the exhaust heat recovery apparatus of the present invention.
- FIG. 6 is an enlarged view of the VI part in FIG.
- thermoelectric element 16 16 p-type thermoelectric element
- thermoelectric element 17 n-type thermoelectric element
- thermoelectric element 45 45 p-type thermoelectric element
- FIG. 1 1 is an internal combustion engine such as a diesel engine
- 2 is an intake hold provided on the intake side of the internal combustion engine
- 3 is an exhaust stoma hold provided on the exhaust side of the internal combustion engine
- 4 is
- the radiator 5 is a pipe for supplying the cooling water Wla, which has been heated to a high temperature by cooling the internal combustion engine 1, to the radiator 4, and 6 is the cooling water Wlb air-cooled in the radiator 4 by the fan 7 driven by the internal combustion engine 1.
- EGR pipe connected to the intake pipe 9 connected to the exhaust motor hold 3 and connected to the exhaust motor hold 3 at one end, and to the intake pipe 9 connected to the internal combustion engine hold 8 Road.
- 10 is an EGR cooler provided in the middle of the EGR pipe 8
- 11 is an EGR valve provided on the downstream side of the EGR gas Gegr in the EGR pipe 8
- 12 is an EGR cooler.
- 13 is a pipe for supplying the cooling water W2b air-cooled in the radiator 4 by the fan 7 to the EGR cooler 10. Road.
- thermoelectric module 14 is a thermoelectric module mounted on the outer periphery of the pipe line 5, and 15 is an outer peripheral part of the pipe line 12. It is a thermoelectric module attached to. Thus, the details of the thermoelectric modules 14, 15 are shown in Figure 2.
- thermoelectric element 16 is a p-type thermoelectric element
- 17 is an n-type thermoelectric element
- 18 is an electrode plate connected to one end face of both thermoelectric elements 16, 17 to connect both thermoelectric elements 16, 17, 19 Is an electrode plate connected to the other end face of the p-type thermoelectric element 16
- 20 is an electrode plate connected to the other end face of the n-type thermoelectric element 17.
- the P-type thermoelectric element 16 and the n-type thermoelectric element 17 for example, Bi—Te system is used, and as the electrode plates 18, 19, 20 a material having good thermal conductivity and conductivity such as a copper alloy is used.
- the p-type thermoelectric element 16 and the n-type thermoelectric element 17 of the thermoelectric modules 14 and 15 are electrically connected in series.
- Reference numeral 21 denotes an insulating material fixed to the outer surface of the electrode plate 18, and 22 denotes an insulating material fixed to the outer surfaces of the electrode plates 19 and 20.
- a ceramic such as alumina or aluminum nitride is used.
- thermoelectric modules 14 and 15 are attached to the outer circumferences of the pipelines 5 and 12 via the insulating material 21, and in the exhaust heat recovery apparatus shown in FIG. Wla and W2a are fed in the direction of the arrow, and cooling air Ac from the fan 7 is fed in the direction of the arrow outside the thermoelectric modules 14 and 15. Therefore, the electrode plate 18 side of the p-type thermoelectric element 16 and the n-type thermoelectric element 17 is heated, the electrode plate 19 side of the p-type thermoelectric element 16 and the electrode plate 47 side of the n-type thermoelectric element 17 are cooled, and the thermoelectric element A potential difference occurs due to a temperature difference between both end faces of 16 and 17 (Seebeck effect). The current 23 generated by the potential difference is supplied to the load 24.
- the EGR valve 11 When the internal combustion engine 1 is operated and the EGR operation is not performed, the EGR valve 11 is closed. Therefore, in this case, the cooling water Wla, which has been cooled to a high temperature by cooling the inside of the internal combustion engine 1, is supplied to the radiator 4 through the pipeline 5, and is cooled by the cooling air Ac from the fan 7 in the radiator 4. The cooling water Wlb having a lowered temperature is introduced into the internal combustion engine 1 from the pipe 6.
- the electrode plate 18 side of the thermoelectric module 14 is heated by the high-temperature cooling water Wla, and the electrode plates 19 and 20 side are cooled by the cooling air Ac.
- a potential difference is generated due to the temperature difference, and the current 23 generated by the potential difference is supplied to the load 24.
- thermoelectric module 14 When the EGR operation is performed when the internal combustion engine 1 is operated, power generation is performed in the thermoelectric module 14 as described above, and power generation is also performed in the thermoelectric module 15. That is, when the EGR operation is performed, the EGR valve 11 is open. For this reason, a part of the exhaust gas from the internal combustion engine 1 is sent as EGR gas Gegr to the EGR cooler 10 through the EGR pipe 8, and is cooled by the cooling water W2b from the pipe 13 in the EGR cooler 10, The air flows into the intake pipe 9 through the EGR valve 11 and is introduced into the internal combustion engine 1 through the intake hold 2 together with the air A.
- the EGR gas Gegr is cooled by the EGR cooler 10 and the cooling water W2a, which has become high in temperature, is introduced into the radiator 4 through the conduit 12.
- the electrode plate 18 side of the thermoelectric module 15 is heated and the electrode plates 19 and 20 side are cooled by the cooling air Ac, a potential difference is generated due to a temperature difference on both end surfaces of the thermoelectric elements 16 and 17, and a current generated by the potential difference is generated. 23 is fed to load 24.
- the heat energy can be recovered as electric power by the thermoelectric modules 14, 15 from the high-temperature cooling water Wla, W2a flowing through the pipelines 5, 12, so that the thermoelectric module 14 and 15 can be expanded, so that exhaust heat can be recovered more effectively than before.
- FIG. 3 and 4 show a second embodiment of the present invention.
- 31 is an internal combustion engine such as a diesel engine equipped with a turbocharger 32, and the intake air As led from the air cleaner 33 is introduced into the compressor 32a of the turbocharger 32 through the intake pipe 34 and pressurized.
- the exhaust gas Gex discharged from each cylinder of the internal combustion engine 31 through the exhaust manifold 37 is supplied to the turbine 32b of the turbocharger 32, and the exhaust gas Gex driving the turbine 32b is an exhaust pipe. It is fed downstream through 38.
- a casing having a cooling water passage 40 in which at least a part of the cooling water W3 from the cooling water passage 39 provided in the cylinder head 41 flows.
- a single 42 is provided integrally with the cylinder head 41, and the exhaust manifold 37
- a thermoelectric module 44 is arranged in a space 43 formed by the casing 42.
- the thermoelectric module 44 includes a p-type thermoelectric element 45 and an n-type thermoelectric element 46, and both thermoelectric elements 45 on one end face of both the thermoelectric elements 45, 46, that is, on the upper surface side of the exhaust manifold 37. , 46 are connected to each other so that an electrode plate 47 is fixed.
- An electrode plate 48 is provided on the other end surface of the p-type thermoelectric element 45, that is, the lower surface side of the casing 42, and an electrode plate 49 is provided on the other end surface of the n-type thermoelectric element 46, that is, the lower surface side of the casing 42. Each is fixed.
- thermoelectric elements 45 and 46 for example, Bi—Te system is used, and as the electrode plates 47, 48, and 49, a material having good thermal conductivity and conductivity such as a copper alloy is used.
- a material having good thermal conductivity and conductivity such as a copper alloy is used.
- the p-type thermoelectric element 45 and the n-type thermoelectric element 46 only one pair of forces is shown in the figure. In fact, a plurality of pairs of thermoelectric elements 45 and 46 are arranged in series and electrically connected in series!
- An insulating material 50 is fixed on the lower surface side of the electrode plate 47, and an insulating material 51 is fixed on the upper surfaces of the electrode plates 48 and 49.
- the insulating materials 50 and 51 for example, ceramics such as alumina and aluminum nitride are used.
- thermoelectric module 44 is mounted on the upper surface of the exhaust mold 37 via an insulating material 50, and is mounted on the lower surface of the casing 42 via an insulating material 51.
- the exhaust gas Gex is fed in the exhaust manifold 37 in the direction of the arrow, and the cooling water W3 from the cooling water passage 39 is in the cooling water passage 40. Is fed in the direction of the arrow and circulates. Therefore, the electrode plate 47 side of the p-type thermoelectric element 45 and the n-type thermoelectric element 46 is heated, and the electrode plate 48 side of the p-type thermoelectric element 45 and the electrode plate 49 side of the n-type thermoelectric element 46 are cooled. As a result, a potential difference is caused by a temperature difference between the both end faces of the thermoelectric elements 45 and 46 (Seebeck effect), and the current generated by the potential difference is supplied to the load.
- Exhaust gas Gex discharged from each cylinder during operation of the internal combustion engine 31 is introduced into the turbine 32b of the turbocharger 32 through the exhaust manifold 37, and the cooling water flow path 39 for cooling the internal combustion engine 31.
- At least a part of the cooling water W3 supplied to is introduced into the cooling water flow path 40 of the casing 42, for example, after flowing in the direction of the arrow, the flow path not shown It circulates through.
- the electrode plate 47 side of the thermoelectric module 44 is heated by the temperature of the exhaust gas Gex, and the electrode plates 48 and 49 side are cooled by the cooling water W3. A potential difference is generated, and a current generated by the potential difference is supplied to the load.
- thermoelectric module 44 thermal energy can be recovered as electric power by the thermoelectric module 44 from the exhaust gas Gex introduced into the exhaust manifold 37, so the application range of the thermoelectric module 44 is expanded. Therefore, the exhaust heat can be recovered more effectively than before.
- FIG. 5 and 6 show a third embodiment of the present invention.
- 52 is a piston that moves up and down in the cylinder liner 54 via a connecting rod 53 by rotation of a crankshaft (not shown), 55 is formed in the cylinder head 41 and the exhaust valve 56 is opened to open the combustion chamber 57.
- This is an exhaust port for guiding the exhaust gas Gex that has been exhausted to the exhaust manifold 37, and the thermoelectric module 44 is positioned between the exhaust port 55 formed in the cylinder head 41 and the cooling water flow path 39. It is installed in the hole provided in 41.
- thermoelectric module 44 The basic configuration of the thermoelectric module 44 is the same as that shown in FIGS. 3 and 4, and in FIG. 6, the same reference numerals as those shown in FIG. 4 denote the same components.
- thermoelectric elements 45 and 46 should be made of materials that can withstand high temperatures. That is, as the material of the thermoelectric elements 45 and 46, for example, NaxCoxOx, CaxCoxOx, or ZnxAlxOx is used in the case of oxide, and FexSix, FexVx, FexMnx, etc. are used in the case of Fe. .
- the exhaust gas Gex exhausted from the combustion chamber 57 during operation of the internal combustion engine 31 is sent to the exhaust port 37 through the exhaust port 55 in the direction of the arrow, and to the exhaust manifold 37.
- the cooling water flows through the cooling water passage 39.
- thermoelectric module 44 is heated by the temperature of the exhaust gas Gex flowing through the exhaust port 55, and the electrode plates 48, 49 side is cooled by the cooling water, so that the thermoelectric elements 45, 46 A potential difference occurs due to the temperature difference at both ends, and the current generated by the potential difference is fed to the load.
- thermoelectric module any number of p-type thermoelectric elements and n-type thermoelectric elements applied to the thermoelectric module can be used as long as they are electrically connected in series. It can be applied, and the current generated by the thermoelectric module can be supplied to the load or stored, and various other changes can be made without departing from the scope of the present invention. Of course, it can be added.
- the exhaust heat recovery apparatus of the present invention can be used for generating power by recovering exhaust heat in facilities that exhaust exhaust gas, such as an internal combustion engine, a prime mover, an incinerator, and the like.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004271263A JP2006086419A (ja) | 2004-09-17 | 2004-09-17 | 排熱回収装置 |
JP2004-271263 | 2004-09-17 | ||
JP2004315591A JP4276610B2 (ja) | 2004-10-29 | 2004-10-29 | 排熱回収装置 |
JP2004-315591 | 2004-10-29 |
Publications (1)
Publication Number | Publication Date |
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WO2006030888A1 true WO2006030888A1 (ja) | 2006-03-23 |
Family
ID=36060135
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/017122 WO2006030888A1 (ja) | 2004-09-17 | 2005-09-16 | 排熱回収装置 |
Country Status (1)
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WO (1) | WO2006030888A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2098713A1 (en) * | 2008-03-06 | 2009-09-09 | Iveco Motorenforschung AG | Thermoelectric heat recuperation system |
CN104279078A (zh) * | 2014-09-26 | 2015-01-14 | 东风商用车有限公司 | 一种汽车尾气温差发电系统 |
CN104279077A (zh) * | 2014-09-26 | 2015-01-14 | 东风商用车有限公司 | 一种两级联动式汽车尾气温差发电系统 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63111268A (ja) * | 1986-10-29 | 1988-05-16 | Mazda Motor Corp | エンジンの排熱利用装置 |
JPH0417148U (ja) * | 1990-05-31 | 1992-02-13 | ||
JPH0679168U (ja) * | 1993-04-22 | 1994-11-04 | シロキ工業株式会社 | 排気熱利用発電装置 |
JPH07227092A (ja) * | 1994-02-10 | 1995-08-22 | Aisin Seiki Co Ltd | 熱電式電気発生装置 |
JP2004208476A (ja) * | 2002-12-26 | 2004-07-22 | Toyota Motor Corp | 排熱発電装置 |
-
2005
- 2005-09-16 WO PCT/JP2005/017122 patent/WO2006030888A1/ja active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63111268A (ja) * | 1986-10-29 | 1988-05-16 | Mazda Motor Corp | エンジンの排熱利用装置 |
JPH0417148U (ja) * | 1990-05-31 | 1992-02-13 | ||
JPH0679168U (ja) * | 1993-04-22 | 1994-11-04 | シロキ工業株式会社 | 排気熱利用発電装置 |
JPH07227092A (ja) * | 1994-02-10 | 1995-08-22 | Aisin Seiki Co Ltd | 熱電式電気発生装置 |
JP2004208476A (ja) * | 2002-12-26 | 2004-07-22 | Toyota Motor Corp | 排熱発電装置 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2098713A1 (en) * | 2008-03-06 | 2009-09-09 | Iveco Motorenforschung AG | Thermoelectric heat recuperation system |
CN104279078A (zh) * | 2014-09-26 | 2015-01-14 | 东风商用车有限公司 | 一种汽车尾气温差发电系统 |
CN104279077A (zh) * | 2014-09-26 | 2015-01-14 | 东风商用车有限公司 | 一种两级联动式汽车尾气温差发电系统 |
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