US20080115923A1 - Exhaust heat recovering device - Google Patents

Exhaust heat recovering device Download PDF

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Publication number
US20080115923A1
US20080115923A1 US11/396,987 US39698706A US2008115923A1 US 20080115923 A1 US20080115923 A1 US 20080115923A1 US 39698706 A US39698706 A US 39698706A US 2008115923 A1 US2008115923 A1 US 2008115923A1
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US
United States
Prior art keywords
evaporator
condenser
cooling water
heat
waste heat
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11/396,987
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English (en)
Inventor
Yasutoshi Yamanaka
Shinichi Hamada
Seiji Inoue
Kimio Kohara
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Denso Corp
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Denso Corp
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Filing date
Publication date
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Assigned to DENSO CORPORATION reassignment DENSO CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HAMADA, SHINICHI, INOUE, SEIJI, KOHARA, KIMIO, YAMANAKA, YASUTOSHI
Publication of US20080115923A1 publication Critical patent/US20080115923A1/en
Abandoned legal-status Critical Current

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Classifications

    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
    • F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat
    • 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
    • F01P9/00—Cooling having pertinent characteristics not provided for in, or of interest apart from, groups F01P1/00 - F01P7/00
    • F01P9/02—Cooling by evaporation, e.g. by spraying water on to cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
    • F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
    • F28D15/0233—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes the conduits having a particular shape, e.g. non-circular cross-section, annular
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
    • F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
    • F28D15/0275—Arrangements for coupling heat-pipes together or with other structures, e.g. with base blocks; Heat pipe cores
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/126—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element consisting of zig-zag shaped fins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • F28F1/26—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means being integral with the element
    • F28F1/28—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means being integral with the element the element being built-up from finned sections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
    • 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
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2270/00—Thermal insulation; Thermal decoupling
    • 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 a waste heat recovery system using heat pipes to recover waste heat of exhaust gas of an internal combustion engine and utilizing it for heating cooling water of the internal combustion engine, for example, is suitably used for a vehicle provided with an internal combustion engine.
  • waste heat of the exhaust gas is transported to the engine cooling water by the heat pipes, whereby the engine cooling water at the time of a low temperature is positively heated and the warmup performance of the engine and heating performance of a heater using the engine cooling water as a heat source are improved.
  • the object of the present invention in consideration of the above problem, is to provide a waste heat recovery system utilizing heat pipes which prevents condensation of the working medium at the insulating part and enables reliable heat transport from the evaporator to the condenser.
  • the present invention employs the following technical means to achieve the above object.
  • a waste heat recovery system having a heat pipe ( 110 ) provided with a heat switch function limiting an amount of heat transported to a condenser ( 110 B) in accordance with the increase in the amount of heating of the evaporator ( 110 A), having the evaporator ( 110 A) arranged at an exhaust pipe ( 11 ) for carrying exhaust gas of the internal combustion engine ( 10 ), and having the condenser ( 110 B) arranged in a cooling water passage( 30 ) for carrying cooling water of the internal combustion engine ( 10 ) and using the heat pipe ( 110 ) to transport waste heat of exhaust gas to cooling water, characterized in that an insulating part ( 110 C) formed between the evaporator ( 110 A) and condenser ( 110 B) is provided with a wall part ( 160 ) for preventing heat transmission from an external fluid.
  • the working medium inside the heat pipe ( 110 ) evaporated at the evaporator ( 110 A) can be prevented from condensing at the insulating part ( 110 C), so reliable heat transport from the evaporator ( 110 A) to the condenser ( 110 B) becomes possible.
  • the wall part ( 160 ) is provided at the upstream side of the flow of the external fluid of the insulating part ( 110 C).
  • the flow of the external fluid is blocked by the wall part ( 160 ) and is prevented from striking the insulating part ( 110 C), so by setting the minimum extent of the wall part ( 160 ), the working medium can be prevented from condensing at the insulating part ( 110 C).
  • wall parts ( 160 ) are connected to the evaporator ( 110 A) and condenser ( 110 B) and are separated by a predetermined amount of clearance ( 161 ) formed between the evaporator ( 110 A) and the condenser ( 110 B), and the separated wall parts ( 160 ) are connected by an elastic part ( 162 ) having elasticity.
  • a plurality of heat pipes ( 110 ) are provided, and first end sides of the plurality of heat pipes ( 110 ) are provided with a connector ( 140 ) connecting the plurality of heat pipes ( 110 ) together.
  • the evaporator ( 110 A) is arranged under the condenser ( 110 B), and the connector ( 140 ) is provided at the evaporator ( 110 A) end side and arranged at the outer surface or inside of the exhaust pipe ( 11 ).
  • the working medium in the connector ( 140 ) is also heated positively by the exhaust gas, so dry out for activation of the heat switch function (cessation of waste heat recovery) can be performed earlier.
  • each heat pipe ( 110 ) is provided with a wick extending from the evaporator ( 110 A) to the condenser ( 110 B), and the evaporator ( 110 A) is arranged above the condenser ( 110 B).
  • an exhaust pipe part ( 130 A) forming part of the exhaust pipe ( 11 ) and a cooling water passage part ( 150 A) forming part of the cooling water passage ( 30 ) are provided, the exhaust pipe part ( 130 A) is joined with the evaporator ( 110 A), and the cooling water passage part ( 150 A) is joined with the condenser ( 110 B).
  • FIG. 1 is a schematic view showing the state of the waste heat recovery system mounted in a vehicle.
  • FIG. 2A is a front view of a waste heat recovery system in a first embodiment
  • FIG. 2B is a right side view of the same.
  • FIG. 3 is a graph showing the amount of heat transferred to engine cooling water according to a waste heat recovery system.
  • FIG. 4A is a front view of a waste heat recovery system in a second embodiment
  • FIG. 4B is a right side view of the same.
  • FIG. 5A is a front view of a waste heat recovery system in a third embodiment
  • FIG. 5B is a right side view of the same.
  • FIG. 6A is a front view of a waste heat recovery system in a first mode of a fourth embodiment
  • FIG. 6B is a right side view of the same.
  • FIG. 7A is a front view of a waste heat recovery system in a second mode of a fourth embodiment
  • FIG. 7B is a right side view of the same.
  • FIG. 8A is a front view of a waste heat recovery system in a third mode of a fourth embodiment
  • FIG. 7B is a right side view of the same.
  • FIG. 1 is a schematic view showing the state of the waste heat recovery system 100 mounted in a vehicle
  • FIG. 2A is a front view showing the waste heat recovery system 100
  • FIG. 2B is a right side view of FIG. 2A
  • FIG. 3 is a graph showing the amount of heat transferred to the engine cooling water by the waste heat recovery system 100 .
  • a vehicle engine 10 is a water-cooled internal combustion engine which has an exhaust pipe 11 from which exhaust gas is exhausted after fuel is burned.
  • the exhaust pipe 11 is provided with a catalytic converter 12 for purifying the exhaust gas.
  • the engine 10 has a radiator circuit 20 by which the engine 10 is cooled by circulation of engine cooling water (hereinafter, “cooling water”) and a heater circuit 30 for heating air-conditioning air using the cooling water (warm water) as a heat source.
  • cooling water engine cooling water
  • heater circuit 30 for heating air-conditioning air using the cooling water (warm water) as a heat source.
  • the radiator circuit 20 is provided with a radiator 21 .
  • the radiator 21 is cooled by heat exchange of the cooling water circulated by a water pump 22 with the outside air.
  • the radiator circuit 20 is provided inside it with a bypass passage (not shown) through which cooling water circulates bypassing the radiator 21 and is designed so that a thermostat (not shown) adjusts the amount of cooling water circulated through the radiator 21 and the amount of cooling water circulating through the bypass passage. In particular, at the time of engine warmup, the amount of cooling water at the bypass passage side is increased and warmup is promoted (that is, overcooling of the cooling water by the radiator 21 is prevented).
  • the heater circuit (corresponding to the cooling water passage in the present invention) 30 is provided with a heater core 31 as a heating use heat exchanger and is designed so that cooling water (warm water) is circulated by the water pump 22 .
  • the heater core 31 is placed in an air-conditioning case of a not shown air-conditioning unit. The air-conditioning air sent in accordance with the blower is heated by heat exchange with warm water.
  • the waste heat recovery system 100 has a plurality of tubes 110 .
  • One end side of each tube 110 is arranged inside the exhaust pipe part 130 A, while the other end side is arranged inside the cooling water passage part 150 A (water tank 150 ).
  • the constituent members (explained below) are made of a stainless steel material provided with a high corrosion resistance. After the constituent members are assembled, they are soldered together by solder material provided at the abutting parts and engaging parts. Further, the exhaust pipe part 130 A is interposed in the exhaust pipe 11 at the part forming the downstream side of the catalytic converter 12 . Cooling water in the heater circuit 30 is circulated in the cooling water passage part 150 A.
  • FIGS. 2A and 2B will be used to explain details of the waste heat recovery system 100 .
  • the tubes 110 are evacuated to a vacuum, then a working medium is sealed in them in predetermined amounts so that the tubes act as heat pipes. They are used in a posture with their longitudinal directions in the vertical direction.
  • the bottom side forms the evaporator 110 A
  • the top side forms the condenser 110 B
  • the section between the two 110 A and 110 B forms the insulating part 110 C (bottom heat type).
  • the inside walls of the tubes 110 corresponding to the condenser 110 B are provided with wicks (porous substances) comprised of metal mesh, metal felt, sintered metal, etc. (not shown).
  • the tubes 110 are formed into flat shapes by combining two tube plates 111 , 112 facing each other. A plurality of (here, four) these are stacked along the left-right direction in FIG. 2A . These tubes 110 are blocked at their top ends and are opened at their bottom ends. Further, the tubes 110 are arranged so that a plurality of columns (for example, three columns) in the left-right direction in FIG. 2B (not shown).
  • the sections between the stacked tubes 110 and the outsides of the outermost tubes 110 are provided with corrugated type fins 120 formed into clamp sectional shapes from a thin sheet material.
  • the bottom ends (openings) of the tubes 110 are formed into square outer shapes and are joined to a first plate 131 formed with tube holes at positions corresponding to the tubes 110 . Further, the tubes 110 are passed through tube holes of a second plate 132 similar to the first plate 131 , while the second plate 132 is arranged at a position forming the top ends of the fins 120 and is joined with the tubes 110 . Further, like the second plate 132 , a third plate 133 is arranged at a boundary position between the condenser 110 B and the insulating part 110 C and is joined to the tubes 110 .
  • the two outermost fins 120 in the stacking direction of the tubes 110 are provided with side plates 134 forming square outside shapes.
  • the side plates 134 are joined to the fins 120 .
  • the bottom ends and the top ends of the side plates 134 are joined to the first plate 131 and second plate 132 .
  • the first plate 131 , second plate 132 , and two side plates 134 form a duct having a square passage cross-section.
  • This duct forms the exhaust pipe part 130 A. Therefore, the evaporator 110 A and fins 120 are arranged inside the exhaust pipe part 130 A.
  • the two openings of the exhaust pipe part 130 A have an inlet side attachment 135 and an outlet side attachment 136 joined with them.
  • the two attachments 135 , 136 form the same shapes.
  • the attachment 135 is a square frame having an opening 135 a the same as the opening of the exhaust pipe part 130 A.
  • the four corners are provided with attachment holes 135 b for attachment to the exhaust pipe 11 .
  • the bottom surface of the first plate 131 (bottom surface of exhaust pipe part 130 A) is joined to a shallow-bottom tank (corresponding to the connector the present invention) 140 opening at the first plate 131 side.
  • the tubes 110 are connected together by this tank 140 .
  • a sealing pipe 141 connected to the inside of the tank 140 is provided.
  • the tubes 110 are evacuated to a vacuum from the sealing pipe 141 , then a working medium is sealed in them, then the sealing pipe 141 is sealed.
  • the working medium used here is water. Water has a boiling point of usually (at one atmosphere) 100° C., but since the tubes 110 are evacuated, the boiling point becomes 30 to 40° C. Further, the working medium used may also be, in addition to water, alcohol, a fluorocarbon, chlorofluorocarbon, etc.
  • the top surface of the third plate 133 is joined with a water tank 150 of a flat box shape opening to the third plate 133 side.
  • the water tank 150 is provided with, at the left side face in FIG. 2A , an inlet pipe 151 and, further, is provided with, at the facing right side face, with an outlet pipe 152 .
  • the pipes 151 , 152 are connected to the inside of the water tank 150 .
  • the third plate 133 , water tank 150 , and two pipes 151 , 152 form the cooling water passage part 150 A.
  • the condenser 110 B is arranged inside the cooling water passage 150 A.
  • insulating wall parts 160 are provided for preventing the cooling air flowing through the region in the vehicle where the waste heat recovery system 100 is arranged (corresponding to the external fluid in the present invention) from striking the insulating part 110 C.
  • the cooling air flows from the left to right direction in FIG. 2A .
  • the insulating wall parts 160 are provided at the left and right sides in FIG. 2A .
  • the insulating wall parts 160 are plate-shaped members with bottom ends joined to the second plate 132 (evaporator 110 A) and with top ends joined to the third plate (condenser 110 B) 133 .
  • the insulating wall parts 160 are separated by formation of a predetermined amount of a notch (corresponding to the clearance in the present invention) 161 between the evaporator 110 A and condenser 110 B.
  • the separated wall parts 160 are connected by a curved part (corresponding to elastic part in the present invention) 162 formed curved and having elasticity as a plate spring.
  • the exhaust pipe part 130 A is interposed in the exhaust pipe 11 at the part forming the downstream side of the catalytic converter 12 and is fixed there by the two attachments 135 , 136 . Further, the inlet pipe 151 and outlet pipe 152 of the cooling water passage part 150 A are connected to the heater circuit 30 .
  • the exhaust pipe part 130 A forms part of the exhaust pipe 11
  • the cooling water passage part 150 A forms part of the heater circuit 30 .
  • the water pump 22 is operated and cooling water circulates through the radiator circuit 20 and heater circuit 30 .
  • the cooling water circulating through the heater circuit 30 flows through the cooling water passage part 150 A of the waste heat recovery system 100 .
  • the exhaust gas of the fuel burned in the engine 10 passes through the catalytic converter 12 and from the exhaust pipe 11 through the exhaust pipe part 130 A of the waste heat recovery system 100 to be discharged into the air.
  • the water (working medium) in the tubes 110 receives heat from the exhaust gas flowing through the exhaust pipe part 130 A at the tank 140 and evaporator 110 A and boils and vaporizes to form steam which rises inside the tubes 110 and flows into the condenser 110 B.
  • the steam flowing into the condenser 110 B is cooled by the cooling water flowing through the cooling water passage part 150 A and becomes condensed water at the wicks provided at their inside walls. This descends by gravity and returns to the evaporator 110 A.
  • the heat of the exhaust gas is transmitted to the water and is transported from the evaporator 110 A to the condenser 110 B.
  • the heat is discharged as the latent heat of condensation, whereby the cooling water flowing through the cooling water passage part is heated.
  • there is also part of the heat of the exhaust gas which is moved through the walls of the tubes 110 by heat conduction from the evaporator 110 A to the condenser 110 B.
  • the amount of heat transported from the evaporator 110 A to the condenser 110 B increases until a predetermined load (heat transfer amount switching point) (waste heat recovery by heat pipes ON).
  • the waste heat recovery by the heat pipes is turned ON, the cooling water is positively heated, and the warmup of the engine 10 is promoted, so the friction loss of the engine 10 is reduced, the increase in fuel for improving the low temperature starting ability is suppressed, and the fuel economy performance is improved. Further, the heating performance of the heater core 31 using the cooling water as a heat source is improved.
  • the inventors confirmed this in actual cars during which they obtained a 3 to 5% effect for the fuel economy performance in a 1.5 liter class gasoline car, 40 km/h, and an outside air temperature of 0 to 25° C. and, further, an effect of +5 to 8° C. for the inlet water temperature of the heater core 31 .
  • the insulating part 110 C of the tubes 110 is provided with insulating wall parts 160 , so even when for example the temperature of the cooling air striking the insulating part 110 C is lower than the cooling water temperature like in a cold region, the cooling air is prevented from striking the insulating part 110 C, so the steam evaporated at the evaporator 110 A can be prevented from condensing at the insulating part 110 C and reliable heat transport from the evaporator 110 A to the condenser 110 B becomes possible.
  • the insulating wall parts 160 are separated by the notch 161 , and the separated wall parts 160 are connected by a curved part 162 having elasticity, so the heat strain occurring at the insulating wall parts 160 due to the temperature difference between the evaporator 110 A and the condenser 110 B can be absorbed by the notch 161 and the curved part 162 . Further, while the insulating wall parts 160 are separated, since they are joined by the curved part 162 , the assembly efficiency will not fall. Further, when the amount of heat transported to the condenser 110 B due to the heat switch function increases, the heat conduction from the evaporator 110 A is blocked by the notch 161 , so the restriction of the heat transport will not be impaired.
  • a tank 140 connecting a plurality of tubes 110 is provided, by providing just one location of the connector 140 with a sealing pipe 141 , it becomes possible to evacuate the inside to a vacuum and seal in a working medium.
  • the evaporator 110 A is arranged under the condenser 110 B and the tank 140 is provided at the evaporator 110 A side end and arranged so as to contact the exhaust pipe part 130 A (first plate 131 ), the working medium in the tank 140 is also positively heated by the exhaust gas and the dry out for activating the heat switch function (turning waste heat recovery OFF) is performed early.
  • the exhaust pipe part 130 A forming part of the exhaust pipe 11 and the cooling water passage part 150 A forming part of the heater circuit 30 are joined integrally with the evaporator 110 A and condenser 110 B to form the waste heat recovery system 100 , it is possible to easily attach the exhaust pipe 11 and heater circuit 30 as a single heat exchanger.
  • FIGS. 4A and 4B A second embodiment of the present invention is shown in FIGS. 4A and 4B .
  • the second embodiment comprises the first embodiment where the tubes 110 and fins 120 are changed to the tubes 110 a and fins 120 a.
  • the tubes 110 a are flat type tubes 110 comprised of two tube plates 111 , 112 combined to form round tube types. Further, the fins 120 a are comprised of the corrugated type fins 120 provided with tube burring holes and are formed as plate types through which the tubes 110 a are inserted. Further, in the condenser 110 B, to improve the heat transmission with the cooling water side, plate type water side fins 120 b are attached. Due to this, similar effects to the first embodiment can be obtained.
  • FIGS. 5A and 5B A third embodiment of the present invention is shown in FIGS. 5A and 5B .
  • the third embodiment is comprised of the first embodiment eliminating the tubes 110 , water tank 150 , and insulating wall parts 160 and stacking plate type fins 120 c to form tubes 110 b , a water tank 150 a , and insulating wall parts 160 a.
  • the fins 120 c are provided with pluralities of holes having burring parts 121 . By stacking the fins 120 c , the burring parts 121 are successively connected whereby tubes 110 b corresponding to round tubes are formed.
  • the outer circumferences of the fins 120 c corresponding to the condenser 110 B are provided with raised edges 122 .
  • the raised edges 122 are successively connected and a water tank 150 a corresponding to a box shaped vessel is formed.
  • the pluralities of burring parts 121 of the fins 120 c corresponding to the condenser 110 B are provided with water holes so as to enable cooling water to circulate across the entire water tank 150 a.
  • the ends of the fins 120 c corresponding to the insulating parts 110 C are provided with bent parts 123 .
  • the bent parts 123 are successively aligned, whereby insulating wall parts 160 a corresponding to the plurality of separated plate-shaped members are formed.
  • FIG. 6A to FIG. 8B Fourth embodiments of the present invention are shown in FIG. 6A to FIG. 8B .
  • the fourth embodiments are comprised of the above first to third embodiments where the evaporators 110 A of the tubes 110 , 110 a , and 110 b are arranged above the condensers 110 B to form top heat types.
  • the waste heat recovery systems 100 shown in FIGS. 6A and 6B , FIGS. 7A and 7B , and FIGS. 8A and 8B appearance wise, are comprised of the waste heat recovery systems 100 explained in FIGS. 2A and 2B , FIGS. 4A and 4B , and FIGS. 5A and 5B inverted vertically and with the inside walls of the tubes 110 , 110 a , and 110 b provided with wicks extending from the condensers 110 B to the evaporators 110 A.
  • insulating wall parts 160 at two locations at the upstream side and downstream side of the cooling air flow, but the invention is not limited to this. It is also possible to provide a wall part at only one location at the upstream side of the cooling air flow. Due to this, the flow of the cooling air is effectively blocked by the insulating wall part 160 and can be prevented from striking the insulating part 110 C, so by setting the minimum extent of an insulating wall part 160 , condensation of the working medium at the insulating part 110 C can be prevented. Further, conversely, insulating wall parts 160 may also be provided at all of the circumference of the insulating part 110 C (four locations).

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Geometry (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Air-Conditioning For Vehicles (AREA)
US11/396,987 2005-04-04 2006-04-03 Exhaust heat recovering device Abandoned US20080115923A1 (en)

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US20100011738A1 (en) * 2008-07-18 2010-01-21 General Electric Company Heat pipe for removing thermal energy from exhaust gas
US20100018180A1 (en) * 2008-07-23 2010-01-28 General Electric Company Apparatus and method for cooling turbomachine exhaust gas
US20100024424A1 (en) * 2008-07-29 2010-02-04 General Electric Company Condenser for a combined cycle power plant
US20100024382A1 (en) * 2008-07-29 2010-02-04 General Electric Company Heat recovery steam generator for a combined cycle power plant
US20100025016A1 (en) * 2008-07-29 2010-02-04 General Electric Company Apparatus and method employing heat pipe for start-up of power plant
US20100028140A1 (en) * 2008-07-29 2010-02-04 General Electric Company Heat pipe intercooler for a turbomachine
US20100024429A1 (en) * 2008-07-29 2010-02-04 General Electric Company Apparatus, system and method for heating fuel gas using gas turbine exhaust
US20100064655A1 (en) * 2008-09-16 2010-03-18 General Electric Company System and method for managing turbine exhaust gas temperature
US20100072292A1 (en) * 2008-09-25 2010-03-25 Munro Mark S Indoor Space Heating Apparatus
US20100077741A1 (en) * 2008-10-01 2010-04-01 Woodson Wayne Samuel Waste heat auxiliary power unit
US20100089548A1 (en) * 2007-04-11 2010-04-15 Viorel Braic Heat exchanger
US20100095648A1 (en) * 2008-10-17 2010-04-22 General Electric Company Combined Cycle Power Plant
US20110006523A1 (en) * 2009-07-08 2011-01-13 Toyota Motor Eengineering & Manufacturing North America, Inc. Method and system for a more efficient and dynamic waste heat recovery system
CN102803887A (zh) * 2010-02-18 2012-11-28 丰田自动车株式会社 废热回收装置
US8714288B2 (en) 2011-02-17 2014-05-06 Toyota Motor Engineering & Manufacturing North America, Inc. Hybrid variant automobile drive
US20150300261A1 (en) * 2014-04-17 2015-10-22 General Electric Company Fuel heating system for use with a combined cycle gas turbine
US20160109193A1 (en) * 2014-10-21 2016-04-21 Greenergy Products, Inc. Equipment and Method
US20160363381A1 (en) * 2015-06-15 2016-12-15 Hamilton Sundstrand Corporation Variable heat rejection using heat pipe heat exchanger
CN109489460A (zh) * 2018-11-27 2019-03-19 重庆大学 一种含尘烟气分级净化余热回收***及除尘蓄换热装置
CN109989811A (zh) * 2019-05-14 2019-07-09 河北工业大学 一种中间介质型内燃机尾气温差发电装置
US10428713B2 (en) 2017-09-07 2019-10-01 Denso International America, Inc. Systems and methods for exhaust heat recovery and heat storage
US10577989B2 (en) * 2015-08-18 2020-03-03 Hanon Systems Vehicle oil warmer and heat exchange system
CN111957170A (zh) * 2020-08-13 2020-11-20 四川淼垚森环保科技有限公司 一种燃烧烟气再利用装置及其使用方法
US11208938B2 (en) * 2018-10-22 2021-12-28 Hyundai Motor Company Exhaust tail trim for vehicle
WO2023212978A1 (zh) * 2022-05-06 2023-11-09 天津大学滨海工业研究院有限公司 一种锅炉设备用余热回收装置

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JP4450056B2 (ja) * 2007-11-21 2010-04-14 トヨタ自動車株式会社 排気熱回収器
JP4870702B2 (ja) * 2008-03-13 2012-02-08 トヨタ自動車株式会社 排気熱回収器
DE102011004599A1 (de) * 2011-02-23 2012-08-23 J. Eberspächer GmbH & Co. KG Wasserheizsystem, insbesondere für Wohnmobile
DE102011121471A1 (de) * 2011-12-17 2013-06-20 Volkswagen Aktiengesellschaft Wärmespeicher zur Speicherung einer Abwärme für ein Fahrzeug sowie Verfahren und System zur Erzeugung mechanischer oder thermischer Energie aus einer Abwärme eines Fahrzeugs
CN116045715B (zh) * 2023-01-09 2023-07-18 浙江志高动力科技有限公司 一种节能螺杆空压机

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Cited By (37)

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US20100089548A1 (en) * 2007-04-11 2010-04-15 Viorel Braic Heat exchanger
US9097466B2 (en) * 2007-04-11 2015-08-04 MAHLE Behr GmbH & Co. KG Heat exchanger
US20100011738A1 (en) * 2008-07-18 2010-01-21 General Electric Company Heat pipe for removing thermal energy from exhaust gas
US8596073B2 (en) * 2008-07-18 2013-12-03 General Electric Company Heat pipe for removing thermal energy from exhaust gas
US20100018180A1 (en) * 2008-07-23 2010-01-28 General Electric Company Apparatus and method for cooling turbomachine exhaust gas
US8186152B2 (en) 2008-07-23 2012-05-29 General Electric Company Apparatus and method for cooling turbomachine exhaust gas
US20100028140A1 (en) * 2008-07-29 2010-02-04 General Electric Company Heat pipe intercooler for a turbomachine
US8015790B2 (en) 2008-07-29 2011-09-13 General Electric Company Apparatus and method employing heat pipe for start-up of power plant
US8425223B2 (en) 2008-07-29 2013-04-23 General Electric Company Apparatus, system and method for heating fuel gas using gas turbine exhaust
US8359824B2 (en) * 2008-07-29 2013-01-29 General Electric Company Heat recovery steam generator for a combined cycle power plant
US20100024429A1 (en) * 2008-07-29 2010-02-04 General Electric Company Apparatus, system and method for heating fuel gas using gas turbine exhaust
US20100024424A1 (en) * 2008-07-29 2010-02-04 General Electric Company Condenser for a combined cycle power plant
US20100024382A1 (en) * 2008-07-29 2010-02-04 General Electric Company Heat recovery steam generator for a combined cycle power plant
US20100025016A1 (en) * 2008-07-29 2010-02-04 General Electric Company Apparatus and method employing heat pipe for start-up of power plant
US8157512B2 (en) 2008-07-29 2012-04-17 General Electric Company Heat pipe intercooler for a turbomachine
US20100064655A1 (en) * 2008-09-16 2010-03-18 General Electric Company System and method for managing turbine exhaust gas temperature
US20100072292A1 (en) * 2008-09-25 2010-03-25 Munro Mark S Indoor Space Heating Apparatus
US8046998B2 (en) 2008-10-01 2011-11-01 Toyota Motor Engineering & Manufacturing North America, Inc. Waste heat auxiliary power unit
US8555640B2 (en) 2008-10-01 2013-10-15 Toyota Motor Engineering And Manufacturing North America, Inc. Waste heat auxiliary power unit
US20100077741A1 (en) * 2008-10-01 2010-04-01 Woodson Wayne Samuel Waste heat auxiliary power unit
US20100095648A1 (en) * 2008-10-17 2010-04-22 General Electric Company Combined Cycle Power Plant
US8330285B2 (en) 2009-07-08 2012-12-11 Toyota Motor Engineering & Manufacturing North America, Inc. Method and system for a more efficient and dynamic waste heat recovery system
US20110006523A1 (en) * 2009-07-08 2011-01-13 Toyota Motor Eengineering & Manufacturing North America, Inc. Method and system for a more efficient and dynamic waste heat recovery system
CN102803887A (zh) * 2010-02-18 2012-11-28 丰田自动车株式会社 废热回收装置
US8714288B2 (en) 2011-02-17 2014-05-06 Toyota Motor Engineering & Manufacturing North America, Inc. Hybrid variant automobile drive
US20150300261A1 (en) * 2014-04-17 2015-10-22 General Electric Company Fuel heating system for use with a combined cycle gas turbine
US20160109193A1 (en) * 2014-10-21 2016-04-21 Greenergy Products, Inc. Equipment and Method
US9939203B2 (en) * 2015-06-15 2018-04-10 Hamilton Sundstrand Corporation Variable heat rejection using heat pipe heat exchanger
US20160363381A1 (en) * 2015-06-15 2016-12-15 Hamilton Sundstrand Corporation Variable heat rejection using heat pipe heat exchanger
US10577989B2 (en) * 2015-08-18 2020-03-03 Hanon Systems Vehicle oil warmer and heat exchange system
US10428713B2 (en) 2017-09-07 2019-10-01 Denso International America, Inc. Systems and methods for exhaust heat recovery and heat storage
US11208938B2 (en) * 2018-10-22 2021-12-28 Hyundai Motor Company Exhaust tail trim for vehicle
CN109489460A (zh) * 2018-11-27 2019-03-19 重庆大学 一种含尘烟气分级净化余热回收***及除尘蓄换热装置
WO2020107826A1 (zh) * 2018-11-27 2020-06-04 重庆大学 一种含尘烟气分级净化余热回收***及除尘蓄换热装置
CN109989811A (zh) * 2019-05-14 2019-07-09 河北工业大学 一种中间介质型内燃机尾气温差发电装置
CN111957170A (zh) * 2020-08-13 2020-11-20 四川淼垚森环保科技有限公司 一种燃烧烟气再利用装置及其使用方法
WO2023212978A1 (zh) * 2022-05-06 2023-11-09 天津大学滨海工业研究院有限公司 一种锅炉设备用余热回收装置

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