EP1724543A1 - Wärmetauschereinheit und Wärmetauscher der die Wärmetauschereinheit verwendet - Google Patents

Wärmetauschereinheit und Wärmetauscher der die Wärmetauschereinheit verwendet Download PDF

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Publication number
EP1724543A1
EP1724543A1 EP05253085A EP05253085A EP1724543A1 EP 1724543 A1 EP1724543 A1 EP 1724543A1 EP 05253085 A EP05253085 A EP 05253085A EP 05253085 A EP05253085 A EP 05253085A EP 1724543 A1 EP1724543 A1 EP 1724543A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
heat exchange
tubes
exchange unit
elements
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.)
Withdrawn
Application number
EP05253085A
Other languages
English (en)
French (fr)
Inventor
Ryuji Ozawa
Yasukai Nakagawa
Katsuyuki Inagaki
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.)
TIG Co Ltd
Original Assignee
TIG Co Ltd
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 TIG Co Ltd filed Critical TIG Co Ltd
Priority to EP05253085A priority Critical patent/EP1724543A1/de
Publication of EP1724543A1 publication Critical patent/EP1724543A1/de
Withdrawn legal-status Critical Current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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/04—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being spirally coiled
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/02—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled
    • F28D7/028—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled the conduits of at least one medium being helically coiled, the coils having a conical configuration
    • 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
    • F28F1/08—Tubular elements crimped or corrugated in longitudinal section
    • 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
    • F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators

Definitions

  • the invention relates to a heat exchange unit for collecting latent or sensible heat and a heat exchanger using the heat exchange unit.
  • known heat exchangers for collecting latent or sensible heat include a heat exchanger tube provided with fins and installed in a snaking fashion, or multiple heat exchanger tubes disposed so as to extend through a flue or the like.
  • These known heat exchangers have problems in that they occupy a relatively large space, and that manufacturing costs are high since the heat exchangers must be designed in accordance with the dimensions of the flue and exhaust temperature to ensure efficiency.
  • Japanese Unexamined Patent Application Publication No. H9(1997)-72679 discloses a heat exchanger including a coiled heat exchanger tube.
  • a water tube with a predetermined length is bent in the middle into a U-shape, and is coiled around the U-shaped bent portion.
  • this invention since a single water tube is bent in the middle into a U-shape and is then coiled, difficult processing is required and manufacturing costs are high.
  • efficiency is reduced since the water tubes overlap one another. Accordingly, in order to obtain a certain efficiency, the size of the heat exchanger must be increased.
  • Japanese Unexamined Patent Application Publication No. H9(1997)-126688 discloses a coiled-plate cross-flow heat exchanger.
  • the invention described in this publication provides a coiled-plate cross-flow heat exchanger having a cleaning device which is composed of a small number of components and which can be easily installed.
  • the coiled-plate cross-flow heat exchanger includes a coiled flow passage and an axial flow passage, one of which receives heating fluid and the other receives fluid to be heated, and a cleaning device.
  • the cleaning device includes a retaining member which extends in the radial direction of the coiled flow passage above a heat transfer plate, rotational driving means which rotates the retaining member in forward and reverse directions, and a rod-shaped member for removing adhered objects, the rod-shaped member movably hanging from the retaining member into the coiled axial flow passage.
  • the coiled flow passage is shaped like concentric annular rings, and does not exactly have a coiled structure like that disclosed in Japanese Unexamined Patent Application Publication No. H9(1997)-72679 in which fluid spirally flows toward or away from the center.
  • the coiled flow passage is single-layered and is shaped like a flat rectangle in cross section. Therefore, the flow velocity distribution is not uniform in the flow passage and efficiency is low.
  • Japanese Unexamined Patent Application Publication No. H11(1999)-248377 relates to a spiral-plate heat exchanger with high heat transfer efficiency and low leakage which uses thin, long heat exchanger plates having irregular surfaces and fluoroplastic films lined or laminated thereon.
  • String-shaped hollow gaskets are provided on a disc-shaped cover for sealing openings at the edges of the plates in the axial direction thereof, the gaskets having a thickness corresponding to a predetermined interval.
  • the hollow sections of the gaskets are expanded along the diameter by applying liquid pressure, so that the gaskets clamp the edges of the plates from the sides and thereby seal the openings airtight.
  • the heat exchanger tubes have a spiral shape
  • the plates have a particular use and cannot be used for collecting latent heat and sensible heat.
  • Japanese Unexamined Patent Application Publication No. 2003-510547 discloses a spiral heat exchanger including at least two spiral sheets extending around a common center axis and forming at least two substantially parallel, spiral flow channels. Each flow channel permits heat exchange fluid to flow in a substantially tangential direction with respect to the center axis. Each flow channel includes a radially outer orifice and a radially inner orifice, the radially outer orifice forming an outlet or an inlet of the flow channel and being located at a radially outer part of the flow channel and the radially inner orifice enabling communication between the flow channel and an inlet/outlet chamber corresponding to the flow channel.
  • the centre axis extends through the inlet/outlet chamber of the radially inner orifice of each flow channel, and the spiral heat exchanger includes a centre body extending around the centre axis and being closed with respect to the flow channels.
  • each flow channel is shaped like a flat rectangle in cross section, similar to the above-described three known structures.
  • the flow channels have a dense spiral structure and are single-layered. Therefore, the structure is complex and large, and manufacturing costs are high.
  • An object of the present invention is to provide a heat exchange unit for collecting latent or sensible heat which has a simple structure and high heat exchange efficiency and with which the size and performance of a heat exchanger can be freely selected in accordance with the equipment and conditions used, and to provide a heat exchanger using the heat exchange unit.
  • a heat exchange unit includes two heat exchange unit elements A and B, the heat exchange unit elements A and B including heat exchanger tubes that are coiled in a single plane with predetermined gaps and being shifted from each other so that the tubes do not overlap each other when viewed from a direction perpendicular to the plane, wherein the tubes are connected to each other at inner or outer ends of the tubes, and wherein one of the elements A and B has a fluid inlet at the outer or inner end of the tube thereof and the other one of the elements A and B has a fluid outlet at the outer or inner end of the tube thereof.
  • a heat exchanger includes a plurality of heat exchange units arranged in a casing, a fluid inlet header, and a fluid outlet header, the fluid inlet header and the fluid header being disposed on the exterior of the casing.
  • Each heat exchange unit includes two heat exchange unit elements A and B, the heat exchange unit elements A and B including heat exchanger tubes that are coiled in a single plane with predetermined gaps and being shifted from each other so that the tubes do not overlap each other when viewed from a direction perpendicular to the plane.
  • each heat exchange unit the tubes are connected to each other at inner or outer ends of the tubes, one of the elements A and B has a fluid inlet at the outer or inner end of the tube thereof, and the other one of the elements A and B has a fluid outlet at the outer or inner end of the tube thereof, the fluid inlet and the fluid outlet being connected to the fluid inlet header and the fluid outlet header, respectively.
  • the heat exchanger tubes according to one of claims 1, 2, and 3 are coiled in a circular shape, a rectangular shape, a conical shape, or a polygonal shape including a triangular shape.
  • a heat exchanger includes heat exchange unit elements A and B including heat exchanger tubes that are coiled in a conical shape, the heat exchange unit elements A and B being connected to each other in the same or opposite orientations at a central position.
  • the heat exchanger tubes according to one of Claims 1 to 5 include a corrugated flexible tube, a spiral flexible tube, a flexible tube with annular ridges, or a flexible tube with partially pressed annular ridges.
  • the heat exchanger tubes of the elements A and B according to one of Claims 1 to 6 have different diameters.
  • fluid enters the fluid inlet at, for example, the outer end of the heat exchanger tube of one of the unit elements from the fluid inlet header and flows through the heat exchanger tube toward the center. Then, the fluid enters the heat exchanger tube of the other unit element at the center, flows outward through this heat exchanger tube, and reaches the fluid outlet header. While the fluid flows inward and outward through the coiled heat exchanger tubes, heat, for example, is collected from exhaust which travels through the spaces outside the heat exchanger tubes.
  • the present invention provides the following effects:
  • Fig. 1 is a front view showing a heat exchange unit 1 according to the invention of Claims 1 to 3.
  • Fig. 2 is a sectional view of Fig. 1 taken along line A-A'.
  • Fig. 3 is a front view of a heat exchanger.
  • Fig. 4 is a diagram showing a structure in which the heat exchanger according to the present invention is attached to an exhaust duct to collect latent heat.
  • Reference numeral 1 denotes a heat exchange unit.
  • the heat exchange unit 1 includes a unit element A composed of a heat exchanger tube 2 and a unit element B composed of a heat exchanger tube 4.
  • the heat exchanger tube 2 has a fluid inlet 3 at an outer end thereof and is coiled toward the center with predetermined gaps W between successive windings.
  • the heat exchanger tube 4 has a fluid outlet 5 at an outer end thereof and is coiled toward the center with predetermined gaps W1.
  • the heat exchanger tubes 2 and 4 of the unit elements A and B, respectively, are connected to each other with a connection pipe 6 at the inner ends thereof.
  • the heat exchanger tubes 2 and 4 are disposed in the gaps W1 and W, respectively, when viewed from the front so that the heat exchanger tubes 2 and 4 do not overlap each other.
  • Reference numeral 7 denotes a rectangular unit frame on which the unit elements A and B are assembled and fixed
  • reference numerals 8 and 8a denote tube-fixing frames connecting the opposing sides of the unit frame 7 at the midpoints thereof.
  • the heat exchanger tubes 2 and 4 are connected to the fixed frames 8 and 8a with fixing bands 9 (see Fig. 4) in every turn.
  • the heat exchange unit 1 having the above structure may, of course, be used by itself. Typically, however, a plurality of heat exchange units are arranged in a casing to form a heat exchanger, which is attached to an exhaust duct or the like when used.
  • FIGs. 3 and 4 show a heat exchanger obtained by arranging a plurality of units between exhaust duct members.
  • a heat exchanger 10 includes five units 1 arranged in a rectangular casing 11 with open ends 10a.
  • Nipples 3a which communicate with fluid inlets 3 of the units 1 and nipples 5a which communicate with fluid outlets 5 of the units 1 face outward from a side surface and a bottom surface, respectively, of the casing 11.
  • An inlet header 12 is connected to the nipples 3a with inlet tubes 13 and lock nuts 13a, and an outlet header 14 is connected to the nipples 5a with outlet tubes 15 and lock nuts 15a.
  • reference numeral 16 denotes a glass window formed at side of casing 11 and thereby the inside can be observed
  • reference numeral 17 denotes exhaust duct members.
  • the casing of the heat exchanger 10 is being connected to the exhaust duct members 17 at the ends l0a thereof.
  • the heat exchange units 1 are all made of stainless steel. However, the heat exchange units 1 may also be made of copper, titanium, titanium alloy, nickel-based corrosion resistant alloy, super austenitic stainless steel, super duplex stainless steel, super ferritic stainless steel, etc., as long as the resistance to corrosion, heat, and impact requirements are satisfied.
  • Example 1 the external shape of the heat exchange units 1 is rectangular since the duct members 17 have a rectangular shape. However, the heat exchange units are formed in a circular shape if the duct members 17 are circular in cross section. In special applications, the heat exchange units may also be triangular, pentagonal, or hexagonal.
  • Example 2 a heat exchanger tube 2 is coiled in a single plane.
  • the coiled heat exchanger tube 2 may be used by itself.
  • a heat exchange unit 1 may be obtained by combining unit elements A and B together.
  • reference numeral 6 denotes a connection pipe which connects heat exchanger tubes 2 of the unit elements A and B to each other at a central position.
  • Fig. 6 shows a heat exchanger 10 obtained by arranging a plurality of heat exchange units 1 having the above structure.
  • reference numeral 18 denotes an inlet/outlet header in which a fluid inlet and a fluid outlet are combined. Similar to Example 1, fluid from the header 18 enters, for example, the element A at an outer end of the element A, flows into the element B through the connection pipe 6, and returns to the header 18 from the element B at the outer end of the element B.
  • the heat exchanger 10 may be designed to have a desired number of units 1.
  • the fluid may flow into the coiled tube at the outer end and out of the coiled tube at the center.
  • the fluid may also flow into the coiled tube at the center and out of the coiled tube at the outer end.
  • Example 3 corresponds to the invention of Claim 4. As shown in Fig. 7, Example 3 differs from Examples 1 and 2 in that heat exchanger tubes 2 and 4 are helically coiled into a conical shape and an inverted conical shape, respectively, instead of being coiled in a single plane. An element A and an element B having the conical and inverted conical shapes are connected to each other with a connection pipe 6 to form a heat exchange unit 1.
  • the heat exchange unit 1 is installed in, for example, a flue a.
  • the heat exchange units 1 When a plurality of heat exchange units 1 having the above structure are combined, the heat exchange units 1 may be arranged along the longitudinal direction thereof. Such a structure is advantageous in increasing a heat transfer area while keeping pressure loss in the flue a as low as possible when the diameter of the flue a is small.
  • the heat exchanger tubes 2 and 4 are straight tubes.
  • a flexible tube such as a corrugated flexible tube shown in Fig. 11 (A), a spiral flexible tube shown in Fig. 11 (B), a flexible tube with annular ridges shown in Fig. 11 (C), or a flexible tube with partially pressed annular ridges shown in Fig. 11 (D) may be used to increase the heat transfer area and to improve the heat exchange efficiency by causing turbulent flow at the ridges.
  • Figs. 8(A) and 8(B) show an example of a circular heat exchange unit including flexible tubes with annular ridges.
  • Fig. 9 shows an example of a square heat exchange unit including similar flexible tubes.
  • Figs. 10(A) and 10(B) show an example of a rectangular heat exchange unit including similar flexible tubes.
  • Figs. 12(A) and 12(B) show a heat exchange unit 1 obtained by combining conical elements A and B such that the elements A and B overlap each other. This structure is advantageous in ensuring the heat transfer area while reducing the outer diameter of the unit 1.
  • Figs. 13(A) and 13(B) show an example in which circular heat exchange units 1 are connected to inlet and outlet headers 12 and 14 in parallel.
  • Figs. 14(A) and 14(B) show an example in which heat exchanger tubes 2 and 4 of a plurality of heat exchange units 1 are connected in series with connection pipes 6a.
  • Figs. 15(A) and 15(B) show an example in which a fluid inlet 3 and a fluid outlet 5 of elements A and B are connected to flanges 3b and 5b, respectively, at the center.
  • the adjacent heat exchange units 1 can be connected to each other in series using the flanges 3b and 5b. This structure is advantageous when there is no space for installing the headers 12 and 14.
  • Fig. 16 shows an example in which a small-diameter unit element A and a large-diameter unit element B are connected to each other with a tapered coupling 6b at a central position.
  • a tapered coupling 6b at a central position.
  • gas may, of course, be injected into the large-diameter element B and be liquidized, and the liquid may be collected through the small-diameter element A.
  • Fig. 17 shows an example in which heat exchanger tubes 2 and 4 of unit elements A and B are assembled in a snaking fashion. Although the heat exchanger tubes 2 and 4 are not coiled, the technique of the present invention is used in that the elements A and B are combined together to form a unit.
  • the heat exchange unit and the heat exchanger according to the present invention have the following applications:

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP05253085A 2005-05-19 2005-05-19 Wärmetauschereinheit und Wärmetauscher der die Wärmetauschereinheit verwendet Withdrawn EP1724543A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05253085A EP1724543A1 (de) 2005-05-19 2005-05-19 Wärmetauschereinheit und Wärmetauscher der die Wärmetauschereinheit verwendet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05253085A EP1724543A1 (de) 2005-05-19 2005-05-19 Wärmetauschereinheit und Wärmetauscher der die Wärmetauschereinheit verwendet

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EP1724543A1 true EP1724543A1 (de) 2006-11-22

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012049318A1 (de) * 2010-10-15 2012-04-19 Behr Gmbh & Co. Kg Wärmetauscher
US20140054015A1 (en) * 2011-05-10 2014-02-27 Alfred Kärcher Gmbh & Co. Kg Heat exchanger and method for its manufacture
WO2016069079A1 (en) * 2014-10-27 2016-05-06 Hussmann Corporation Heat exchanger with non-linear coil
CN107966047A (zh) * 2017-11-21 2018-04-27 合肥华凌股份有限公司 换热器及冷柜
WO2019162269A1 (de) * 2018-02-23 2019-08-29 Elringklinger Ag Wärmeübertragersystem
RU196872U1 (ru) * 2019-12-02 2020-03-18 Федеральное государственное бюджетное образовательное учреждение высшего образования "Казанский государственный архитектурно-строительный университет" (КазГАСУ) Змеевиковый теплообменник
CN111442535A (zh) * 2020-05-12 2020-07-24 宁波川渡流体科技有限公司 一种热交换单元、装置及其构成的温开水机
EP3995754A1 (de) * 2020-11-10 2022-05-11 Nedzib Mahmutovic Wärmespeicher

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB138870A (en) * 1919-02-08 1921-08-08 Griscom Russell Co Improvements in or relating to heat interchangers
FR771245A (fr) * 1933-05-12 1934-10-03 Sulzer Ag échangeur de chaleur
US4557323A (en) * 1983-08-04 1985-12-10 Electro-Magic, Inc. Heat exchanger and method of making same
DE19503506A1 (de) * 1994-09-15 1996-03-21 Jacob Karl August Vorrichtung zur Nutzung von Wärme- und/oder Flüssigkeitsmengen aus Gas- und Flüssigkeitsströmen an Dampferzeugern
FR2817332A1 (fr) * 2000-11-30 2002-05-31 Guillot Ind Sa Serpentin tubulaire a deux etages d'enroulements en spirale, echangeur de chaleur mettant en oeuvre un tel serpentin et procede de fabrication du serpentin

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB138870A (en) * 1919-02-08 1921-08-08 Griscom Russell Co Improvements in or relating to heat interchangers
FR771245A (fr) * 1933-05-12 1934-10-03 Sulzer Ag échangeur de chaleur
US4557323A (en) * 1983-08-04 1985-12-10 Electro-Magic, Inc. Heat exchanger and method of making same
DE19503506A1 (de) * 1994-09-15 1996-03-21 Jacob Karl August Vorrichtung zur Nutzung von Wärme- und/oder Flüssigkeitsmengen aus Gas- und Flüssigkeitsströmen an Dampferzeugern
FR2817332A1 (fr) * 2000-11-30 2002-05-31 Guillot Ind Sa Serpentin tubulaire a deux etages d'enroulements en spirale, echangeur de chaleur mettant en oeuvre un tel serpentin et procede de fabrication du serpentin

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012049318A1 (de) * 2010-10-15 2012-04-19 Behr Gmbh & Co. Kg Wärmetauscher
US20140054015A1 (en) * 2011-05-10 2014-02-27 Alfred Kärcher Gmbh & Co. Kg Heat exchanger and method for its manufacture
US9841244B2 (en) * 2011-05-10 2017-12-12 Alfred Kärcher Gmbh & Co. Kg Heat exchanger and method for its manufacture
WO2016069079A1 (en) * 2014-10-27 2016-05-06 Hussmann Corporation Heat exchanger with non-linear coil
US9528771B2 (en) 2014-10-27 2016-12-27 Hussmann Corporation Heat exchanger with non-linear coil
CN107966047A (zh) * 2017-11-21 2018-04-27 合肥华凌股份有限公司 换热器及冷柜
WO2019162269A1 (de) * 2018-02-23 2019-08-29 Elringklinger Ag Wärmeübertragersystem
RU196872U1 (ru) * 2019-12-02 2020-03-18 Федеральное государственное бюджетное образовательное учреждение высшего образования "Казанский государственный архитектурно-строительный университет" (КазГАСУ) Змеевиковый теплообменник
CN111442535A (zh) * 2020-05-12 2020-07-24 宁波川渡流体科技有限公司 一种热交换单元、装置及其构成的温开水机
EP3995754A1 (de) * 2020-11-10 2022-05-11 Nedzib Mahmutovic Wärmespeicher

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