WO2002057691A1 - Systeme echangeur thermique a gaz souple - Google Patents

Systeme echangeur thermique a gaz souple Download PDF

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Publication number
WO2002057691A1
WO2002057691A1 PCT/CA2002/000052 CA0200052W WO02057691A1 WO 2002057691 A1 WO2002057691 A1 WO 2002057691A1 CA 0200052 W CA0200052 W CA 0200052W WO 02057691 A1 WO02057691 A1 WO 02057691A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat exchanger
tubes
gas
exchanger system
secured
Prior art date
Application number
PCT/CA2002/000052
Other languages
English (en)
Inventor
Laurent Gierula
Michel-André LAMARCHE
Original Assignee
Technologies Echangeurs Gaz-Air (T.E.G.A) Inc.
Gaz Metropolitain
Centre Des Technologies Du Gaz Naturel
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 Technologies Echangeurs Gaz-Air (T.E.G.A) Inc., Gaz Metropolitain, Centre Des Technologies Du Gaz Naturel filed Critical Technologies Echangeurs Gaz-Air (T.E.G.A) Inc.
Publication of WO2002057691A1 publication Critical patent/WO2002057691A1/fr

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Classifications

    • 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
    • F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F23D14/10—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with elongated tubular burner head
    • F23D14/105—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with elongated tubular burner head with injector axis parallel to the burner head axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L17/00—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues
    • F23L17/005—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues using fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M9/00—Baffles or deflectors for air or combustion products; Flame shields
    • F23M9/003—Baffles or deflectors for air or combustion products; Flame shields in flue gas ducts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M9/00—Baffles or deflectors for air or combustion products; Flame shields
    • F23M9/08—Helical or twisted baffles or deflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/06—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators
    • F24H3/08—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators by tubes
    • F24H3/087—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators by tubes using fluid fuel
    • 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
    • F28D7/08—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 otherwise bent, e.g. in a serpentine or zig-zag
    • 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
    • F28D7/08—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 otherwise bent, e.g. in a serpentine or zig-zag
    • F28D7/082—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 otherwise bent, e.g. in a serpentine or zig-zag with serpentine or zig-zag configuration
    • F28D7/085—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 otherwise bent, e.g. in a serpentine or zig-zag with serpentine or zig-zag configuration in the form of parallel conduits coupled by bent portions

Definitions

  • the present invention relates to a compact, highly flexible and efficient, multi-positionable, multidimensional and multi-stage gas-fired heat exchanger system for use in a forced air duct.
  • the heat exchanger utilizes a cascaded array of serpentine heat transfer tubes.
  • the heat exchanger of the present invention was conceived to replace existing oil- fired or electric forced air heating systems and designed as a replacement thereof. Accordingly, the heat exchanger system of the present invention is adaptable to existing duct regardless of the size and orientation of the duct.
  • U.S. Patent 5,368,010 An example of a gas-fired heater used in a forced air system is illustrated and described in U.S. Patent 5,368,010. It is a fixed system and it is located in a furnace unit which is supported on a floor located at the base of the ductwork. This patent deals primarily with the evacuation of combustion gases at the outlet of the heat exchange tubes. Reference is also made to U.S. Patent 5,042,453, 5,094,224 and 4,729,207 as other examples of gas- fired heaters used as a furnace associated with an air convection duct system.
  • Another feature of the present invention is to provide a gas -fired heat exchanger system as above described and which is constructed in accordance with parameters of existing air ducts and wherein the physical characteristics of the construction can be determined by way of a dedicated computer software .
  • Another feature of the present invention is to provide a gas-fired heat exchanger system as above described comprising a plurality of gas heaters and wherein the gas heaters can be modulated to adjust the heating capacity from about 5% to 100%.
  • Another feature of the present invention is to provide a gas-fired heat exchanger system as above described and wherein the main component parts of the system are all accessible on a support panel which is located exteriorly of the convection ducts and easily accessible.
  • Another feature of the present ' invention is to provide a gas-fired heat exchanger system as above described and wherein a novel turbulator is used within the heat transfer tubes to increase the efficiency of the heat exchanger .
  • Another feature of the present invention is to provide a gas-fired heat exchanger system as above described and wherein the flue combustion gases can be evacuated regardless of the position of the heat exchanger and by simple means.
  • the present invention provides a compact, highly flexible and efficient, multi-positionable and multidimensional gas-fired heat exchanger system for use in a forced air duct.
  • the heat exchanger system comprises one or more heat transfer tubes .
  • Each of the tubes have a shape and dimension dictated by a predetermined customized use of the heat exchanger.
  • the tubes are secured to a support panel .
  • a gas burner is mounted on the support panel and disposed for directing a flame at an inlet opening of an associated one of the heat transfer tubes.
  • a gas distribution manifold supplies gas to the burner.
  • a position orientable gas valve is secured to the manifold and connectable to a gas supply line.
  • the gas valve is adjusted to a horizontal position regardless of the angular position of said system when secured to a duct.
  • the tubes each have an outlet connected to combustion product position orientable exhaust means secured to the support panel.
  • Control means is provided to control the operation of the burners dependent on heat requirements.
  • gas flow turbulence inducing means associated with at least some of the tubes to cause turbulence in a hot flue-gas flow in each of the tubes to modify the efficiency in heat transfer along one or more sections of the tubes by directing hot flue-gas along an inner circumferential wall of the tubes .
  • FIG. 1 is a perspective view illustrating a gas- fired heat exchanger system of the present invention mounted in an air duct of a forced air system;
  • FIG. 2 is a perspective view showing the basic component part of the heat exchanger secured to a support panel and utilizing U-shaped tubes ' ;
  • FIG. 3 is a perspective view similar to Figure 2 but showing W-shaped serpentine tubes
  • FIG. 4 is an exploded perspective view showing the construction of the support panel and how the tubes are securable thereto;
  • FIG. 5 is an exploded perspective view showing the construction and associated attachments of the gas burners
  • FIG. 6 is a front view of the gas distribution manifold and solenoid valves
  • FIG. 7 is a side view of Figure 6
  • FIG. 8 is an enlarged view showing the construction of the air/gas turbulator plate secured about the inlet of the tubes in proximity of the gas burner whereby to impart added turbulence to the flame;
  • FIG. 9 is a perspective view illustrating the construction of the combustion product collection housing and adjustable exhaust fan
  • FIG. 10 is a side view of an elongated rectangular metal plate utilized to construct the flue-gas turbulator;
  • FIG. 11 is a side view showing the construction of the turbulator sections;
  • FIG. 12 is an end view of Figure 11 showing the disposition of the sections;
  • FIG. 13 is an exploded perspective view illustrating the mounting plate for mounting associated hardware with the equipment mounted on the support panel;
  • FIG. 14 is an electrical diagram illustrating the electric circuit utilized for a single stage heat exchanger
  • FIG. 15 is an electrical diagram showing the electric circuit for a multi-stage system
  • FIG. 16 is an electrical diagram illustrating the electric circuit for a modulated system.
  • FIG. 17 is an exploded view of the entire heat exchange system with its front housing and herein utilizing U-shaped heat transfer tubes.
  • FIG. 10 there is shown generally at 10 the compact, highly flexible and efficient, multi- positionable, multi-dimensional and multi-stage gas-fired heat exchanger system of the present invention and as herein mounted in a forced air duct 11.
  • An independent blower 12 circulates air from an air entry duct 13 through the multi- stage heat transfer tubes 14 in the direction of arrow 15.
  • the heat transfer tubes 14 are U-shaped tubes and are secured at opposed ends 16 and 16' to a support panel 17.
  • the end 16 of the tubes 14, is the inlet end, and end 16' is the outlet end.
  • a plurality of gas burners 18, herein venturi type burners are positioned in front the inlet end of the tubes 14 and direct a flame in each of the inlet end sections 16 of each tube.
  • the gas burners 18 are secured to a gas distribution manifold 19.
  • a position orientable gas valve 20, which may be a single or two-stage or modulated valve, is secured to the manifold and through its coupling 21 is always positioned horizontally.
  • the heat exchanger system 10 is herein shown as being mounted sideways (horizontal) with the gas valve 20 having been positioned in the horizontal plane (90° to its position shown in Fig. 3) .
  • gas flow turbulators 22 are disposed in the outlet end sections 16'' of the tubes, herein a W-shaped heat transfer tube 14' whereby to induce turbulence in the hot flue-gas flow in each of the tubes to modify the efficiency in heat transfer along the outlet section 16 ' ' .
  • What the turbulators do is to direct the hot flue-gas along the inner circumferential wall of the tubes and there is virtually no gas flow along the central longitudinal axis of the tubes in the outlet section 16" where the turbulator is positioned.
  • turbulator section could also be positioned in the inlet end section 16 ' ' ' of the W-shaped tube 14 as shown in Figure 2 but in an area space behind the flame of the burners, which flame projects into the inlet end section of these tubes. This would also increase the efficiency of the heat transfer tubes.
  • the outlet end 16 ' of these tubes 14, 14' which are secured to the support panel 17, open in a collection housing 23 which receives combustion gas from the tubes.
  • An exhaust fan 24 is secured to an outlet port 25 formed in an outer wall 26 of the housing 23 to create a suction within the collection housing to draw the hot combustion products through the tube and to exhaust the combustion products into a chimney duct 27.
  • the exhaust fan 24 has an adjustable shroud 28 which permits it to be positioned at various angles depending on the desired orientation of the chimney duct 27. Accordingly, regardless of the position of the heat exchange system when secured in a duct, the exhaust is flexible and permits the evacuation of combustion products along any desired path or angle.
  • the support panel 17 is provided with a plurality of pre-drilled holes 29 to mount to the inlet and outlet sections of the tubes.
  • the panel also has internal flanges 30 to facilitate the connection of the support panel to a front housing as will be described later. It also provides for ease of location of a thermal insulating sheet 31 over the front surface of the panel to protect the panel against the intense heat of the flame of the burners and the combustion products in the collection housing 23.
  • an air/gas turbulator plate 32 is securable over the holes 29 facing the burners.
  • the turbulator plate 32 is provided with an orifice 33 having inwardly extending deflector flanges 34 disposed side by side all about the circumference of the orifice whereby to increase turbulence at the inlet end opening 16 of the tubes where the flame is injected.
  • deflector flanges 34 diminish the laminar secondary air flow and maximizes thermal exchange with the tubes in the inlet end sections thereof .
  • the burners 18 are venturi type burners and they have a predetermined heat rate, such as, 17.5K BTU/h, 23.5K BTU/h, 30K BTU/h and 50K BTU/h.
  • a solenoid valve 35 is also associated with each of the burners 18. These valves 35 are used to operate the burners 18 independently by controlling the solenoids whereby to control the heating capacity of the system from about 5% to 100% of its total thermal heat exchange capacity.
  • These solenoids have a very quick response time and are connected to the gas distribution manifold 19 by threaded conduits 30 permitting quick assembly and disassembly of the burner units for assembly, replacement or repair.
  • Nozzles 37 are also separately mounted between the solenoid and the burners 18 and provide ease of assembly and maintenance.
  • the entire assembly is supported on the support panel 17 by brackets 38. Accordingly, this assembly can be pre-asse bled and then secured to the support panel 17.
  • the brackets 38 are secured to flanges 39 welded to opposed ends of the manifold 19.
  • Figures 10 to 12 there will be described the construction of the turbulator 22.
  • the turbulator is constructed of an elongated rectangular flat metal plate 40 which is cut from opposed elongated edges 41 thereof to form opposed slits 42 whereby to form a plurality of deflection sections 43.
  • the deflection sections 43 are octagonally shaped as shown in Figure 11 by bending the corner sections 44 in opposed directions whereby to form deflection plate sections 43 of octagonal contour. These deflection plate sections 43 are also bent in the plane of the strip of the flat plate 40 at angles of approximately 45°, as shown in Figure 12 to form a twisted turbulator to force the combustion gas flow flowing therethrough away from the center of the tubes 14 to an inner surface 14' of the tubes, as illustrated in Figure 12. ⁇
  • the strip can also be cut at any desired length and preferably between the deflection plate sections 43, at areas such as illustrated by reference numeral 45, to fit in a desired section of a tube. Accordingly, the turbulator can have different quantities of deflection plate sections. Although not shown, the sections 44 could be of different sizes to create turbulation.
  • various components associated with the system are also mounted on a component mounting plate 50 forwardly of the support panel 17.
  • the mounting plate 50 extends outwardly on a vertical axis spaced from the burners 18 as can be seen in Figure 2.
  • the mounting plate assembly 50 is provided to mount associated hardware and to make it readily accessible for servicing and repair.
  • an igniting control device 51 is secured to the component mounting plate assembly and the igniter 52 is secured to the side plate 50' at a position to ignite the burners.
  • An igniter cable 53 connects the igniter 52 to the igniter controller 51.
  • a flame detector 54 is also mounted on the side plate 50' and has a detector cable 55 connected thereto, as is well known in the art.
  • a pressure detector 56 is also secured to the horizontal panel 50" and a detector tube 57 is connected thereto.
  • a high limit temperature detector 58 is also connected to the panel 50'.
  • a voltage transformer 59 and a relay 60 are also connected to the horizontal panel for ready access and servicing.
  • Figure 17 there is shown the construction of a support frame 61 which is secured to the support panel 17.
  • the support frame 61 comprises a bottom and top wall 62 and 63 respectively secured to the top and bottom internal flanges 30 of the front panel 17, and a rear wall 64 secured between rear edges 62 ' and 63 ' of the bottom and top plates 62 and 63, respectively.
  • top and bottom and rear walls all have contour flanges which help to secure same in an air duct such as the duct 11 as shown in Figure 1, to orient the tubes for heat exchange with air flow in the duct when a blower pushes air through the duct for heating the convected air.
  • the dimensions of the plate are dictated by the cross-sectional dimension of the duct in which the system is to be installed.
  • top and bottom walls 63 and 62 are provided with air deflecting flanges 65 which project internally in the air flow to cause air turbulence of the convected air in the area of the transfer tubes to improve heat transfer between the tubes and convected air.
  • the rear wall 64 is provided with a vertical tube support flange 66 to support a far end section of the heat transfer tubes to maintain them ⁇ in spaced parallel ' stack relationship.
  • This flange is also illustrated in Figure 4 and as shown in that Figure heat exchange clamps 67 may also be secured to the tubes 14.
  • the heat exchange clamps are provided with a plurality of projecting flanges 68 to dissipate heat into the air flowing through the heat exchanger tubes .
  • the heat exchange clamps are secured to at least some of the tubes along the inlet section thereof where the tubes are at a higher temperature.
  • these tubes may be of U-shapes, W-shapes, square shapes or any other suitable shapes for heat exchange with the convected air in the duct and to suit the application.
  • the gas-fired heat exchanger system of the present invention is customizable to suit air ducts of different sizes and different capacity requirements.
  • a computer software to calculate specific physical parameters for the construction of the heat exchanger of the present invention.
  • the computer is inputted information relating to the dimension of duct where the heat exchanger is required to be installed as well as information relating to the volume of air to be heated.
  • Parameters of the static pressure of the forced air system are also inputted in the computer as well as the temperature of air to be convected upstream of the heat exchanger. Also inputted is the desired temperature required downstream of the heat exchanger.
  • the software produces physical parameters for the design of the unit including the configuration of the heat transfer tubes, the quantity of the tubes required, the diameter and length of the tubes and the thermal capacity of the burners . Accordingly, the size of the unit is adjustable whereby the length of its side LI, width L2 , and height H,- as shown in Fig. 2, are variable.
  • the heat transfer tubes 14 are all connected in stack parallel spaced relationship and all attached to the support panel to produce a compact package.
  • the heat exchanger will comprise a plurality of heat exchange tubes and these can be controlled in a "multi-stage” application as shown by the schematic electrical diagram in Figure 15 or in a "modulated mode" as illustrated by the schematic diagram of Figure 16.
  • the thermal capacity of the heat exchanger can be controlled by switching on and off some of the burners thereby utilizing only certain ones of the heat transfer tubes to satisfy the heat demand.
  • the gas valve 20 is a two- stage valve which permits a control of the temperature in a range of from about 5% to 100% of its total capacity. In that mode, with the two- stage valve 20 the first burner is ignited at 50% of its maximum capacity and later its capacity is increased to 100%. The other burners are then ignited one after the other and this is how the temperature control of the heat exchanger is varied.
  • FIG. 14 is a circuit diagram for a single stage heat exchanger capable of generating a predetermined heat capacity which is non-variable.
  • the heat exchange system 10 may be mounted at any desired position along the X, Y or Z axis as illustrated by arrows 71, 72 and 73. Regardless of the positioning of the unit the gas valve 20 is adjusted to lie in a horizontal plane. This is done by using a suitable coupling 21 or simply rotating the gas valve on the threaded end of the pipe coupling 21 depending on the position of the unit. But this is predetermined by the application.
  • a protective housing 80 having an access panel 81 for access to the support panel 17 may also be provided.
  • a lock could also secure the front panel 81 to the housing.
  • the front panel 81 is provided with an air intake 82 to admit combustion air to the burners.
  • a gas line entry port 83 may be provided on the front panel around the side and as hereinshown is protected by a grommet 84.
  • the exhaust fan 24 may also be secured to either the side walls 85 or top and bottom walls 86 and 87 of the housing depending on the position of the installation and the flue pipe.
  • a flexible extension tube 88 having couplings 89 at opposed ends thereof to connect the collection housing 23 to the exhaust fan 24.
  • the exhaust fan 24 is also provided with a coupling 90 to secure to an exhaust pipe and attaching flange and gaskets 91 and 92 respectively.
  • An extension pipe 93 may also be secured to the exhaust fan, if necessary.
  • the system is actuated by a heat requirement on the low voltage created by the thermostat and the system firstly monitors the safety equipment associated therewith.
  • the relay 60 then connects the gas, herein natural gas, and upon detecting the gas pressure, the ignition control commands the opening of the gas valve and the igniter.
  • the gas herein natural gas
  • the ignition control commands the opening of the gas valve and the igniter.
  • the gas is modulated through a gas modulating valve.
  • the gas modulating valve can vary the temperature of the flame and therefore heat exchanger between 40% and 100% of its maximum value.
  • the purpose of the burner modulation is to maintain the temperature of the air to be heated substantially constant.
  • the gas modulating valve is controlled by a variable control device 100 as shown in Figure 15.
  • the control circuit is illustrated by Figure 1 .
  • each of the burners 18 is controlled independently by the solenoid valve 35.
  • the burners are ignited, or not, one at a time to satisfy the temperature demands.
  • the main gas valve is a two-stage valve the first burner can be positioned to generate a low temperature flame which is usually half of the maximal intensity or at a high temperature flame.
  • the temperature of the flame and the number of burners that are activated it is possible to control the temperature of the heat exchanger within the range of about 5% to 100%, as previously described. This way it is possible to provide a more precise control of the air temperature for comfort.
  • the speed of the exhaust fan 24 can be controlled in combination with the burners by suitable control circuitry. It is within the ambit of the present invention to cover any obvious modifications • of the preferred embodiment described herein, provided such modifications fall within the scope of the appended claims .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

L'invention concerne un système échangeur thermique à gaz compact, très souple et efficace, à plusieurs positions, dimensions et étages. Le système est relié à une conduite à air forcé, quelles que soient la position angulaire et la taille de ladite conduite. L'échangeur thermique comporte au moins un tube de transfert thermique formé et dimensionné en fonction de l'utilisation prévue de l'échangeur thermique. Les tubes sont fixés à un panneau de support ainsi que le brûleur à gaz associé à chaque orifice d'admission des tubes. Une soupape à gaz orientable est fixée à un collecteur de distribution. On peut associer à au moins un certain nombre de tubes un agitateur afin de provoquer des tourbillons dans l'écoulement de combustion à chaud dans chacun des tubes afin de modifier l'efficacité au niveau du transfert thermique le long d'au moins une section des tubes en dirigeant les gaz de combustion à chaud le long d'une paroi circonférentielle des tubes. L'orifice de sortie des tubes est raccordée à un collecteur doté d'un ventilateur d'extraction orientable s'adaptant à l'installation de l'échangeur thermique dans la conduite.
PCT/CA2002/000052 2001-01-16 2002-01-15 Systeme echangeur thermique a gaz souple WO2002057691A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA 2331168 CA2331168C (fr) 2001-01-16 2001-01-16 Systeme echangeur de chaleur flexible a gaz
CA2,331,168 2001-01-16

Publications (1)

Publication Number Publication Date
WO2002057691A1 true WO2002057691A1 (fr) 2002-07-25

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1947386A1 (fr) * 2007-01-22 2008-07-23 Guillot Industrie Turbulateur, notamment pour chaudière à tubes de fumées, et chaudière correspondante
EP2025868A1 (fr) * 2007-08-10 2009-02-18 Siemens Aktiengesellschaft Aube de turbine avec turbulateur à l'entrée d'air de refroidissement
CN114018074A (zh) * 2021-11-01 2022-02-08 安徽理工大学 一种空间双涡管弹性管束换热器
CN117053603A (zh) * 2023-09-27 2023-11-14 广东捷邦节能设备制造有限公司 一种节能型不锈钢换热器

Citations (6)

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US4729207A (en) 1986-09-17 1988-03-08 Carrier Corporation Excess air control with dual pressure switches
US5042453A (en) 1989-09-28 1991-08-27 Rheem Manufacturing Company Compact, high efficiency heat exchanger for a fuel-fired forced air heating furnace
EP0450241A1 (fr) * 1990-04-05 1991-10-09 LES CHEMINEES PHILIPPE Société Anonyme dite Raccord universel de conduit de fumée
US5094224A (en) 1991-02-26 1992-03-10 Inter-City Products Corporation (Usa) Enhanced tubular heat exchanger
US5368010A (en) 1992-07-29 1994-11-29 Consolidated Industries Corp. Multi-position forced air furnace

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB157868A (en) * 1917-05-06 1921-09-22 Sulzer Ag Improvements in or relating to boilers for heating apparatus
US4729207A (en) 1986-09-17 1988-03-08 Carrier Corporation Excess air control with dual pressure switches
US5042453A (en) 1989-09-28 1991-08-27 Rheem Manufacturing Company Compact, high efficiency heat exchanger for a fuel-fired forced air heating furnace
EP0450241A1 (fr) * 1990-04-05 1991-10-09 LES CHEMINEES PHILIPPE Société Anonyme dite Raccord universel de conduit de fumée
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1947386A1 (fr) * 2007-01-22 2008-07-23 Guillot Industrie Turbulateur, notamment pour chaudière à tubes de fumées, et chaudière correspondante
FR2911673A1 (fr) * 2007-01-22 2008-07-25 Guillot Ind Sa Turbulateur, notamment pour chaudiere a tubes de fumees, et chaudiere correspondante
EP2025868A1 (fr) * 2007-08-10 2009-02-18 Siemens Aktiengesellschaft Aube de turbine avec turbulateur à l'entrée d'air de refroidissement
CN114018074A (zh) * 2021-11-01 2022-02-08 安徽理工大学 一种空间双涡管弹性管束换热器
CN117053603A (zh) * 2023-09-27 2023-11-14 广东捷邦节能设备制造有限公司 一种节能型不锈钢换热器
CN117053603B (zh) * 2023-09-27 2024-04-02 广东捷邦节能设备制造有限公司 一种节能型不锈钢换热器

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