US20080053649A1 - Heat exchange apparatus - Google Patents

Heat exchange apparatus Download PDF

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Publication number
US20080053649A1
US20080053649A1 US11/897,220 US89722007A US2008053649A1 US 20080053649 A1 US20080053649 A1 US 20080053649A1 US 89722007 A US89722007 A US 89722007A US 2008053649 A1 US2008053649 A1 US 2008053649A1
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United States
Prior art keywords
condenser
unit
evaporation
temperature fluid
communication unit
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
US11/897,220
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English (en)
Inventor
Kenshirou Muramatsu
Yasutoshi Yamanaka
Masashi Miyagawa
Kimio Kohara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denso Corp
Original Assignee
Denso Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Denso Corp filed Critical Denso Corp
Assigned to DENSO CORPORATION reassignment DENSO CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KOHARA, KIMIO, MIYAGAWA, MASASHI, MURAMATSU, KENSHIROU, YAMANAKA, YASUTOSHI
Publication of US20080053649A1 publication Critical patent/US20080053649A1/en
Abandoned legal-status Critical Current

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Classifications

    • 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
    • F28D15/0266—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 with separate evaporating and condensing chambers connected by at least one conduit; Loop-type heat pipes; with multiple or common evaporating or condensing chambers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
    • B60H1/025—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant from both the cooling liquid and the exhaust gases of the propulsion plant
    • 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
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/001—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core
    • 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
    • F01P2037/00—Controlling
    • F01P2037/02—Controlling starting
    • 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
    • F01P2060/08—Cabin heater
    • 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
    • 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
    • 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

  • This invention relates to a heat exchange apparatus using heat pipes.
  • a conventional heat exchange apparatus which recovers exhaust heat of exhaust gas of an internal combustion engine (hereinafter referred to simply as engine) of an automotive vehicle and utilizes the exhaust heat to warm-up an engine.
  • JP4-45393A discloses a loop-type heat-pipe heat exchange apparatus using heat pipes for a water heating system.
  • an evaporable and condensable working fluid is circulated in a circulation path of a closed loop, evaporated by absorbing heat from a heat storage member in an evaporation unit and condensed by releasing the heat to water in a condenser unit.
  • the lower end portions of a plurality of heat pipes communicate with each other through a lower header (hereinafter referred to as a condenser-side communication unit), so that the working fluid condensed in the condenser unit flows into the plurality of the heat pipes through the condenser-side communication net.
  • the object of this invention is to provide a loop-type heat-pipe heat exchange apparatus applicable to a heat source in the form of a fluid.
  • a heat exchange apparatus comprising a first housing ( 100 ) with a high-temperature fluid flowing therein, a second housing ( 200 ) with a low-temperature fluid flowing therein, an evaporation unit ( 1 ) for exchanging heat between the working fluid and the high-temperature fluid to thereby evaporate the working fluid, a condenser unit ( 2 ) for exchanging heat between the working fluid and the low-temperature fluid to thereby condense the working fluid, an evaporation-side communication unit ( 5 a ) for leading the working fluid evaporated in the evaporation unit ( 2 ) to the condenser unit ( 2 ), and a condenser-side communication unit ( 5 b ) for leading the working fluid condensed in the condenser unit ( 2 ) to the evaporation unit ( 1 ), wherein the high-temperature fluid is prevented from flowing to the condenser-side communication unit ( 5 b ).
  • condenser-side shield plates ( 8 a , 8 b ; 101 , 102 ), which can be used to prevent the high-temperature fluid from flowing to the condenser-side communication unit ( 5 b ), may be arranged integrally with the first housing ( 100 ) or the evaporation unit ( 1 ).
  • the condenser-side shield plate ( 8 a ; 101 ) may be arranged upstream of the condenser-side communication unit ( 5 b ) in the flow of the high-temperature fluid.
  • the high-temperature fluid can be prevented from flowing to the surface of the condenser-side communication unit ( 5 b ) upstream in the flow of the high-temperature fluid.
  • the condenser-side shield plates ( 8 a , 8 b ; 101 , 102 ) can be arranged upstream or downstream of the condenser-side communication unit ( 5 b ) in the flow of the high-temperature fluid.
  • the high-temperature fluid can be prevented from flowing to the surface of the condenser-side communication unit ( 5 b ) upstream in the flow of the high-temperature fluid on the one hand, and the high-temperature fluid can be prevented from flowing to the surface of the condenser-side communication unit ( 5 b ) downstream in the flow of the high-temperature fluid on the other hand.
  • dry-out can be prevented.
  • the condenser-side shield plate ( 101 ) arranged upstream of the condenser-side communication unit ( 5 b ) in the flow of the high-temperature fluid can be configured to reduce the area of the path in the first housing ( 100 ) continuously toward the evaporation unit ( 1 ) from the upstream side of the high-temperature fluid flow.
  • the high-temperature fluid smoothly flows into the evaporation unit ( 1 ) and disturbance of the flow can be suppressed.
  • heat exchange between the high-temperature fluid and the working fluid in the evaporation unit ( 1 ) can be successfully performed.
  • the first housing ( 100 ) may include an enlarged portion ( 132 ) having an enlarged path area and the condenser-side communication unit ( 5 b ) can be arranged in the enlarged portion ( 132 ).
  • the high-temperature fluid can be prevented from flowing to the condenser-side communication unit ( 5 b ).
  • the high-temperature fluid generates condensed water by heat exchange with the working fluid
  • the apparatus may include a condensed water path ( 1023 ) for removing condensed water pooled around the condenser-side communication unit ( 5 b ) downstream of the condenser-side communication unit ( 5 b ) in the flow of the high-temperature fluid.
  • condensed water pooled around the condenser-side communication unit ( 5 b ) can be removed downstream.
  • the high-temperature fluid generates condensed water by heat exchange with the working fluid
  • the apparatus may include a condensed water path ( 132 c ) for discharging the condensed water pooled around the condenser-side communication unit ( 5 b ) outside of the first housing ( 100 ).
  • condensed water pooled around the condenser-side communication unit ( 5 b ) can be discharged outside.
  • the condenser-side communication unit ( 5 b ) can be projected out from the first housing ( 100 ).
  • the high-temperature fluid can be prevented from flowing to the condenser-side communication unit ( 5 b ).
  • the high-temperature fluid can be prevented from flowing through gaps between the outer peripheral surfaces of the evaporation unit ( 1 ), the evaporation-side communication unit ( 5 a ) and the condenser-side communication unit ( 5 b ) on the one hand and the inner peripheral surface of the first housing ( 100 ) on the other hand.
  • the ratio of the amount of high-temperature fluid flowing through the evaporation unit ( 1 ) which represents of the total amount of the high-temperature fluid flowing in the first housing ( 100 ) is increased, and therefore, heat exchange between the high-temperature fluid and the working fluid is successfully conducted.
  • the apparatus may include condenser-side shield plates ( 101 , 102 ) in order to prevent the high-temperature fluid from flowing through the gap between the outer peripheral surface of the condenser-side communication unit ( 5 b ) and the inner peripheral surface of the first housing ( 100 ), and evaporation-side shield plates ( 111 , 112 ) in order to prevent the high-temperature fluid from flowing through the gap between the outer peripheral surface of the evaporation-side communication unit ( 5 a ) and the inner peripheral surface of the first housing ( 100 ).
  • the apparatus may be configured so that the condenser-side shield plate ( 101 ) and the evaporation-side shield plate ( 111 ) are arranged upstream of the condenser-side communication unit ( 5 b ) in the flow of the high-temperature fluid and the area of the path in the first housing ( 100 ) is continuously decreased toward the evaporation unit ( 1 ) from the upstream side of the high-temperature fluid flow.
  • the high-temperature fluid smoothly flows to the evaporation unit ( 1 ) and disturbance of the flow can be suppressed. Therefore, heat exchange between the high-temperature fluid and the working fluid in the evaporation unit ( 1 ) can be smoothly carried out.
  • the apparatus may be configured so that the condenser-side shield plate ( 102 ) and the evaporation-side shield plate ( 112 ) are arranged downstream of the condenser-side communication unit ( 5 b ) in the high-temperature fluid flow, and the area of the path in the first housing ( 100 ) is continuously increased from the evaporation unit ( 1 ) toward the downstream side of the high-temperature fluid flow.
  • the high-temperature fluid flows out of the evaporation unit ( 1 ) smoothly and smooth gas flow is obtained.
  • heat exchange between the exhaust gas and the working fluid can be smoothly conducted.
  • Water can also be used as the working fluid.
  • the exhaust gas discharged from the water-cooled internal combustion engine can be used as the high-temperature fluid, and the cooling water of the water-cooled internal combustion engine as the low-temperature fluid.
  • the exhaust heat can be utilized in order to warm-up the engine.
  • a vehicle equipped with a heating apparatus using the engine cooling water as a heat source can also be heated more quickly during the engine warming-up operation.
  • a heat exchange apparatus comprising an evaporation unit ( 1 ) arranged in a high-temperature fluid path with a high-temperature fluid flowing therein for exchanging heat between the working fluid and the high-temperature fluid thereby to evaporate the working fluid, a condenser unit ( 2 ) arranged in a low-temperature fluid path with a low-temperature fluid flowing therein for exchanging heat between the working fluid and the low-temperature fluid thereby to condense the working fluid, an evaporation-side communication unit ( 5 a ) for leading the working fluid evaporated in the evaporation unit ( 1 ) to the condenser unit ( 2 ), and a condenser-side communication unit ( 5 b ) for leading the working fluid condensed in the condenser unit ( 2 ) to the evaporation unit ( 1 ), wherein the high-temperature fluid is prevented from flowing to the condenser-side communication unit ( 5 b ).
  • FIG. 1 is a front view of a heat exchange apparatus according to a first embodiment of the invention as taken from the upstream side of the exhaust gas flow.
  • FIG. 2 is a front sectional view of the heat exchange apparatus according to the first embodiment.
  • FIG. 3 is a schematic sectional view taken along line A-A in FIG. 1 .
  • FIG. 4 is a front view of a heat exchange apparatus according to a second embodiment of the invention as taken from the upstream side of the exhaust gas flow.
  • FIG. 5 is a schematic sectional view taken along line C-C in FIG. 4 .
  • FIG. 6 is a schematic sectional view showing a heat exchange apparatus according to a third embodiment of the invention.
  • FIG. 7 is a schematic sectional view showing a heat exchange apparatus according to a fourth embodiment of the invention.
  • FIG. 8 is a schematic sectional view showing a heat exchange apparatus according to a fifth embodiment of the invention.
  • FIG. 9 is a schematic sectional view showing a heat exchange apparatus according to a sixth embodiment of the invention.
  • FIG. 10 is a schematic sectional view showing a heat exchange apparatus according to a seventh embodiment of the invention.
  • FIG. 11 is a schematic sectional view showing a heat exchange apparatus according to an eighth embodiment of the invention.
  • FIG. 12 is a schematic sectional view showing a heat exchange apparatus according to a ninth embodiment of the invention.
  • the exhaust heat of the exhaust gas is recovered from the exhaust system of the water-cooled engine of the automotive vehicle to heat the engine cooling water, and the heated engine cooling water is used as a heat source for a climate control system or the like.
  • FIG. 1 is a front view of the heat exchange apparatus according to this embodiment as taken from the upstream side of the exhaust gas flow.
  • FIG. 2 is a front sectional view of the heat exchange apparatus according to this embodiment, and
  • FIG. 3 a schematic sectional view taken along line A-A in FIG. 1 .
  • the heat exchange apparatus comprises a cylindrical first housing 100 with the exhaust gas flowing therein as a high-temperature in the direction of arrow B ( FIG. 3 ) therein, a second housing 200 with the engine cooling water flowing therein as a low-temperature fluid, and a heat exchanger 300 for absorbing heat from the exhaust gas and releasing the heat into the engine cooling water.
  • the first housing 100 , the second housing 200 and the heat exchanger 300 are integrated with each other before being coupled to the engine exhaust pipe not shown or the engine cooling water pipe not shown.
  • the first housing 100 which is arranged midway of and coupled to the engine exhaust pipe, constitutes a part of the exhaust pipe.
  • the second housing 200 which is arranged midway of and coupled to the engine cooling water pipe, constitutes a part of the cooling water pipe.
  • the heat exchanger 300 includes an evaporation unit 1 and the condenser unit 2 arranged adjacently to each other.
  • the evaporation unit 1 is arranged in the first housing 100 and exchanges heat between the exhaust gas and a working fluid described later thereby to evaporate the working fluid.
  • the condenser unit 2 arranged in the second housing 200 , exchanges heat between the working fluid evaporated in the evaporation unit 1 and the engine cooling water thereby to condense the working fluid.
  • the evaporation unit 1 has a plurality of evaporation-side heat pipes 3 a .
  • the plurality of the evaporation-side heat pipes 3 a each have a flat form so that the direction in which the exhaust gas flows (the direction perpendicular to the page in FIG. 1 ) coincides with the direction of the long side thereof on the one hand, and are arranged in parallel to each other so that the longitudinal direction thereof coincides with the vertical direction on the other hand.
  • the flat surface on each side of each evaporation-side heat pipes 3 a is coupled with a corrugated outer fin 4 a , whereby the area of heat transmission to and from the exhaust gas is increased thereby to promote the heat exchange between the working fluid and the exhaust gas.
  • the condenser unit 2 has a plurality of condenser-side heat pipes 3 b .
  • the plurality of the condenser-side heat pipes 3 b each have a flat form so that the direction in which the engine cooling water flows (the direction perpendicular to the page in FIG. 1 ) coincides with the direction of the long side thereof on the one hand, and are arranged in parallel to each other so that the longitudinal direction thereof coincides with the vertical direction on the other hand. More specifically, the condenser-side heat pipes 3 b are arranged so that the longitudinal direction thereof coincides with the longitudinal direction of the evaporation-side heat pipes 3 a .
  • straight fins 4 b are coupled to the flat surface on each side of the condenser-side heat pipes 3 b , whereby the area of heat transmission to and from the engine cooling water is increased thereby to promote the heat exchange between the working fluid and the engine cooling water.
  • a pair of communication units 5 a , 5 b extending in the direction orthogonal to the length of the heat pipes 3 a , 3 b and communicating with all the heat pipes 3 a , 3 b are arranged at the longitudinal (vertical) ends of the heat pipes 3 a , 3 b , respectively.
  • the working fluid evaporated in the evaporation unit 1 is led to the condenser unit 2 by the evaporation-side communication unit 5 a arranged on the vertically upper side, while the working fluid condensed in the condenser unit 2 is led to the evaporation unit 1 by the condenser-side communication unit 5 b arranged on the vertically lower side.
  • the heat pipes 3 a , 3 b and the communication unit pair 5 a , 5 b make up a closed loop, which has sealed therein the evaporable and condensable working fluid (water in this embodiment).
  • the amount of the working fluid is set at least in such a manner that the liquid level is located above the condenser-side communication unit 5 b.
  • a side plate 7 extending substantially in parallel to the length of the evaporation-side heat pipes 3 a and reinforcing the evaporation unit 1 is arranged at each end of the evaporation unit 1 .
  • the first housing 100 includes condenser-side shield plates 101 , 102 for preventing the exhaust gas from flowing to the condenser-side communication unit 5 b while at the same time preventing the exhaust gas from flowing through the gap between the outer peripheral surface of the condenser-side communication unit 5 b and the inner peripheral surface of the first housing 100 .
  • the first condenser-side shield plate 101 arranged upstream of the condenser-side communication unit 5 b in the exhaust gas flow includes a cover plate portion 1011 arranged orthogonally to the direction in which the exhaust gas flow to cover the surface of the condenser-side communication unit 5 b upstream in the exhaust gas flow and a swash plate portion 1012 arranged diagonally to the direction in which the exhaust gas flows for reducing the area of the path in the first housing 100 continuously from the upstream side of the exhaust gas flow toward the evaporation unit 1 .
  • the second condenser-side shield plate 102 arranged downstream of the condenser-side communication unit 5 b in the exhaust gas flow includes a cover plate portion 1021 arranged orthogonally to the direction in which the exhaust gas flows to cover the surface of the condenser-side communication unit 5 b downstream in the exhaust gas flow and a swash plate portion 1022 arranged diagonally to the direction in which the exhaust gas flows to continuously increase the area of the path in the first housing 100 from the evaporation unit 1 toward the downstream side of the exhaust gas flow.
  • the first housing 100 also, includes evaporation-side shield plates 111 , 112 for smoothing the exhaust gas flow in the neighborhood of the evaporation-side communication unit 5 a while at the same time preventing the exhaust gas from flowing through the gap between the outer peripheral surface of the evaporation-side communication unit 5 a and the inner peripheral surface of the first housing 100 .
  • the first evaporation-side shield plate 111 arranged upstream of the evaporation-side communication unit 5 a in the exhaust gas flow includes a cover plate portion 1111 arranged in the direction perpendicular to the direction in which the exhaust gas flows to cover the surface of the evaporation-side communication unit 5 a upstream in the exhaust gas flow and a swash plate portion 1112 arranged diagonally to the direction in which the exhaust gas flows to reduce the area of the path in the first housing 100 continuously from the upstream side of the exhaust gas flow toward the evaporation unit 1 .
  • the second evaporation-side shield plate 112 arranged downstream of the evaporation-side communication unit 5 a in the exhaust gas flow includes a cover plate portion 1121 arranged in the direction perpendicular to the direction in which the exhaust gas flows to cover the surface of the evaporation-side communication unit 5 a downstream in the exhaust gas flow and a swash plate portion 1122 arranged diagonally to the direction in which the exhaust gas flows to increase the area of the path in the first housing 100 continuously from the evaporation unit 1 toward the downstream side of the exhaust gas flow.
  • the exhaust gas flows through the evaporation unit 1 so that the liquid-phase working fluid in the evaporation-side heat pipe 3 a evaporates by absorbing heat from the exhaust gas, and the gas-phase working fluid flows into the condenser unit 2 through the evaporation-side communication unit 5 a .
  • the gas-phase working fluid flowing in the condenser-side heat pipes 3 b is condensed by releasing heat to the engine cooling water, and the working fluid thus condensed flows into the evaporation unit 1 through the condenser-side communication unit 5 b.
  • the first condenser-side shield plate 101 prevents the exhaust gas from flowing to the surface of the condenser-side communication unit 5 b upstream in the exhaust gas flow on the one hand
  • the second condenser-side shield plate 102 prevents the exhaust gas from flowing to the surface of the condenser-side communication unit 5 b downstream in the exhaust gas flow on the other hand.
  • the working fluid is prevented from being evaporated in the condenser-side communication unit 5 b by being heated by the exhaust gas, and the liquid-phase working fluid is positively supplied also to the part of the condenser-side communication unit 5 b far from the condenser unit 2 .
  • dry-out is prevented and heat exchange performance is improved.
  • the swash plate portions 1012 , 1112 of the first condenser-side shield plate 101 and the first evaporation-side shield plate 111 cause the exhaust gas to flow smoothly into the evaporation unit 1
  • the swash plate portions 1022 , 1122 of the second condenser-side shield plate 102 and the second evaporation-side shield plate 112 cause the exhaust gas to flow out smoothly from the evaporation unit 1 to secure a satisfactory gas flow.
  • the heat exchange is carried out successfully between the exhaust gas and the working fluid.
  • first condenser-side shield plate 101 and the second condenser-side shield plate 102 prevent the exhaust gas from flowing through the gap between the outer peripheral surface of the condenser-side communication unit 5 b and the inner peripheral surface of the first housing 100 .
  • first evaporation-side shield plate 111 and the second evaporation-side shield plate 112 prevent the exhaust gas from flowing through the gap between the outer peripheral surface of the evaporation-side communication unit 5 a and the inner peripheral surface of the first housing 100 .
  • the exhaust gas flow is concentrated in the evaporation unit 1 .
  • the ratio of the amount of the exhaust gas flowing through the evaporation unit 1 which represents of the total amount of the exhaust gas flowing in the first housing 100 increases, resulting in the successful heat exchange between the exhaust gas and the working fluid.
  • the exhaust gas flows only in the evaporation unit 1 and therefore the heat exchange between the exhaust gas and the working fluid becomes more successful.
  • FIG. 4 is a front view showing the heat exchange apparatus according to this embodiment as taken from the upstream side of the exhaust gas flow
  • FIG. 5 a schematic sectional view taken along line C-C in FIG. 4 .
  • the component parts identical or equivalent to those of the first embodiment are designated by the same reference numerals, respectively, and not described any more.
  • the first housing 100 includes a tubular portion 131 substantially identical with the evaporation unit 1 in the shape and dimensions as viewed from the direction in which the exhaust gas flows and a tubular enlarged portion 132 substantially identical with the evaporation unit 1 in the shape and dimensions as viewed from the direction in which the exhaust gas flows and having a larger area of the path than the tubular portion 131 .
  • the evaporation-side communication unit 5 a is arranged in the vertically upper enlarged portion 132 a of the enlarged portion 132
  • the condenser-side communication unit 5 b is arranged in the vertically lower enlarged portion 132 b of the enlarged portion 132
  • the evaporation unit 1 and the tubular portion 131 are arranged in such a manner as to share the same projection plane as viewed along the direction in which the exhaust gas flows. Therefore, the exhaust gas in the first housing 100 flows not to the evaporation-side communication unit 5 a or the condenser-side communication unit 5 b but only through the evaporation unit 1 .
  • the working fluid is prevented from being evaporated in the condenser-side communication unit 5 b by being heated by the exhaust gas, and the liquid-phase working fluid is positively supplied also to the part of the condenser-side communication unit 5 b far from the condenser unit 2 .
  • dry-out is suppressed for improved heat exchange performance.
  • the exhaust gas flow is concentrated in the evaporation unit 1 , and therefore, the heat exchange between the exhaust gas and the working fluid is conducted successfully.
  • FIG. 6 is a schematic sectional view of the heat exchange apparatus according to this embodiment.
  • the component parts identical or equivalent to those of the first embodiment are designated by the same reference numerals, respectively, and not explained any further.
  • the first housing 100 includes a tubular portion 141 substantially identical with the evaporation unit 1 in shape and dimensions as viewed along the direction in which the exhaust gas flows and openings 142 substantially identical in shape and dimensions to the evaporation unit 1 as viewed in vertical direction.
  • the evaporation-side communication unit 5 a and the condenser-side communication unit 5 b are projected out from the first housing 100 from the openings 142 , and the evaporation unit 1 is arranged inside the first housing 100 .
  • the working fluid is prevented from being evaporated in the condenser-side communication unit 5 b by being heated by the exhaust gas, and the liquid-phase working fluid is positively supplied also to the part of the condenser-side communication unit 5 b far from the condenser unit 2 . Therefore, dry-out is prevented and the heat exchange performance improved.
  • FIG. 7 is a schematic sectional view of the heat exchange apparatus according to this embodiment.
  • the component parts identical or equivalent to those of the first embodiment are designated by the same reference numerals, respectively, and not explained any further.
  • a condensed water path 1023 for establishing communication between the upstream and downstream sides of the second condenser-side shield plate 102 of the first housing 100 in the exhaust gas flow is formed in the vertically lowest part of the second condenser-side shield plate 102 .
  • the part of the condensed water generated by heat exchange between the exhaust gas and the working fluid which stays around the condenser-side communication unit 5 b is removed downstream of the condenser-side communication unit 5 b in the exhaust gas flow through the condensed water path 1023 .
  • FIG. 8 is a schematic sectional view of the heat exchange apparatus according to this embodiment.
  • the component parts identical or equivalent to those of the second embodiment are designated by the same reference numerals, respectively, and not explained any further.
  • the first housing 100 is so constructed that a pipe-like condensed water path 132 c for connecting the space in the lower enlarged portion 132 b and the exterior of the first housing 100 is arranged in the vertically lowest part of the lower enlarged portion 132 b.
  • FIG. 9 is a schematic sectional view showing the heat exchange apparatus according to this embodiment.
  • the component parts identical or equivalent to those of the first embodiment are designated by the same reference numerals, respectively, and is not further described.
  • condenser-side shield plates 8 a , 8 b for preventing the exhaust gas from flowing to the condenser-side communication unit 5 b are arranged integrally with the evaporation unit 1 . More specifically, the first condenser-side shield plate 8 a arranged upstream of the condenser-side communication unit 5 b in the exhaust gas flow is coupled to the surface of the condenser-side communication unit 5 b upstream in the exhaust gas flow.
  • the second condenser-side shield plate 8 b arranged downstream of the condenser-side communication unit 5 b in the exhaust gas flow is coupled to the surface of the condenser-side communication unit 5 b downstream in the exhaust gas flow.
  • the condenser-side shield plates 8 a , 8 b are formed of a material lower in heat conductivity than the condenser-side communication unit 5 b to reduce the heat transmitted from the exhaust gas to the condenser-side communication unit 5 b.
  • the heat transmission from the exhaust gas to the condenser-side communication unit 5 b is suppressed by the condenser-side shield plates 8 a , 8 b .
  • the condenser-side communication unit 5 b prevents the working fluid from being evaporated by being heated by the exhaust gas, so that the liquid-phase working fluid can be positively supplied also to the part of the condenser-side communication unit 5 b far from the condenser unit 2 . Therefore, dry-out is prevented resulting in improved heat exchange performance.
  • FIG. 10 is a schematic sectional view showing the heat exchange apparatus according to this embodiment.
  • the component parts identical or equivalent to those of the first embodiment are designated by the same reference numerals, respectively, and not described any further.
  • the shield plates 101 , 102 111 , 112 have parallel plate portions 1013 , 1023 , 1113 , 1123 extending in parallel to the exhaust gas flow between the cover plate portions 1011 , 1021 , 1111 , 1121 and the swash plate portions 1012 , 1022 , 1112 , 1122 , respectively.
  • the exhaust gas flows more smoothly into and out of the evaporation unit 1 .
  • a satisfactory gas flow is obtained, and therefore, the heat exchange between the exhaust gas and the working fluid is carried out successfully.
  • FIG. 11 is a schematic sectional view showing the heat exchange apparatus according to this embodiment.
  • the component parts identical or equivalent to those of the first embodiment are designated by the same reference numerals, respectively, and is not further described.
  • the swash plate portion 1012 of the first condenser-side shield plate 101 and the swash plate portion 1112 of the first evaporation-side shield plate 111 are configured in arcuate form to reduce the area of the path in the first housing 100 first steeply and then gradually from the upstream side of the exhaust gas flow toward the evaporation unit 1 .
  • the swash plate portion 1022 of the second condenser-side shield plate 102 and the swash plate portion 1122 of the second evaporation-side shield plate 112 are configured in arcuate form to increase the area of the path in the first housing 100 first gradually and then steeply from the evaporation unit 1 toward the downstream side of the exhaust gas flow.
  • FIG. 12 is a schematic sectional view showing the heat exchange apparatus according to this embodiment.
  • the component parts identical or equivalent to those of the first embodiment are designated by the same reference numerals, respectively, and not described any further.
  • the swash plate portion 1012 of the first condenser-side shield plate 101 and the swash plate portion 1112 of the first evaporation-side shield plate 111 are configured in arcuate form to reduce the area of the path in the first housing 100 first gradually and then steeply from the upstream side of the exhaust gas flow toward the evaporation unit 1 .
  • the swash plate portion 1022 of the second condenser-side shield plate 102 and the swash plate portion 1122 of the second evaporation-side shield plate 112 are configured in arcuate form to increase the area of the path in the first housing 100 first steeply and then gradually from the evaporation 1 toward the downstream side of the exhaust gas flow.
  • the first housing 100 after being integrated with the heat exchanger 300 , is coupled to the engine exhaust pipe.
  • the heat exchanger 300 may be coupled to the first housing 100 after coupling the first housing 100 to the engine exhaust pipe.
  • the evaporation unit 1 and the condenser unit 2 are arranged adjacently to each other.
  • the invention is not limited to this configuration, and the evaporation unit 1 and the condenser unit 2 may be arranged in spaced relation to each other.
  • the plurality of the heat pipes 3 a , 3 b instead of being arranged with the length thereof in a vertical direction as in each of the embodiments described above, may alternatively be arranged in a non-horizontal direction at an angle to the vertical direction as long as the condensed working fluid exists in the lowest part of the heat pipes 3 a , 3 b.
  • the apparatus according to the invention may include one instead of a plurality of the evaporation-side heat pipes 3 a.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
US11/897,220 2006-08-30 2007-08-29 Heat exchange apparatus Abandoned US20080053649A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006233394A JP2008057820A (ja) 2006-08-30 2006-08-30 熱交換装置
JP2006-233394 2006-08-30

Publications (1)

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US20080053649A1 true US20080053649A1 (en) 2008-03-06

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US11/897,220 Abandoned US20080053649A1 (en) 2006-08-30 2007-08-29 Heat exchange apparatus

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US (1) US20080053649A1 (zh)
JP (1) JP2008057820A (zh)
CN (1) CN100585156C (zh)
DE (1) DE102007040634A1 (zh)

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US20110188179A1 (en) * 2010-02-02 2011-08-04 Apple Inc. Handheld device enclosure
US20170138241A1 (en) * 2014-04-04 2017-05-18 Nissan Motor Co, Ltd. Exhaust device of engine
US10648746B2 (en) 2014-01-30 2020-05-12 Calsonic Kansei Corporation Exhaust waste heat recovery device

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DE102013201464B4 (de) * 2013-01-30 2016-08-25 Eberspächer Exhaust Technology GmbH & Co. KG Plattenwärmetauscher einer Brennkraftmaschine
DE102013201467B4 (de) * 2013-01-30 2023-03-23 Purem GmbH Wärmetauscher einer Brennkraftmaschine und Brennkraftmaschine
JP6152755B2 (ja) * 2013-09-02 2017-06-28 富士通株式会社 ループヒートパイプ
JP6540143B2 (ja) * 2015-03-24 2019-07-10 日産自動車株式会社 エンジンの排気装置

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US20110188179A1 (en) * 2010-02-02 2011-08-04 Apple Inc. Handheld device enclosure
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US10648746B2 (en) 2014-01-30 2020-05-12 Calsonic Kansei Corporation Exhaust waste heat recovery device
US20170138241A1 (en) * 2014-04-04 2017-05-18 Nissan Motor Co, Ltd. Exhaust device of engine
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Publication number Publication date
CN101135278A (zh) 2008-03-05
CN100585156C (zh) 2010-01-27
JP2008057820A (ja) 2008-03-13
DE102007040634A1 (de) 2008-07-17

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