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US20140261242A1 - Corrugated indirect water heater coil - Google Patents

Corrugated indirect water heater coil Download PDF

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Publication number
US20140261242A1
US20140261242A1 US14/215,685 US201414215685A US2014261242A1 US 20140261242 A1 US20140261242 A1 US 20140261242A1 US 201414215685 A US201414215685 A US 201414215685A US 2014261242 A1 US2014261242 A1 US 2014261242A1
Authority
US
United States
Prior art keywords
tubing
heating coil
coils
corrugated
intake
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
US14/215,685
Inventor
Spencer Rode
Phillip W. Stephens
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.)
HTP Inc
Original Assignee
HTP Inc
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 HTP Inc filed Critical HTP Inc
Priority to US14/215,685 priority Critical patent/US20140261242A1/en
Assigned to HTP, INC. reassignment HTP, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: STEPHENS, PHILLIP
Publication of US20140261242A1 publication Critical patent/US20140261242A1/en
Abandoned legal-status Critical Current

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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
    • 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
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/0027—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters 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
    • F28D7/02—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
    • F28D7/024—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 only one medium being helically coiled tubes, the coils having a cylindrical 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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/007—Auxiliary supports for elements
    • F28F9/013—Auxiliary supports for elements for tubes or tube-assemblies

Definitions

  • the present patent document relates generally to water heaters and more specifically to a corrugated indirect water heater coil used in water heaters and other heater transfer appliances.
  • the corrugated indirect heating coil solves the problems of the prior art by providing a heater coil that includes corrugations to maximize surface area and, thus, heat transfer, between heat transfer mediums.
  • the mediums may include water to water, steam to water, glycol to water, brine to water, and the like, as is known in the art, and may be used in open and closed loop systems, but is not limited thereto.
  • FIG. 1 shows a perspective view of a heating coil
  • FIG. 2 is a partial cross-section view of a heating coil tubing
  • FIG. 3 a partial cross-section view of an intake of a heating coil tubing, Inset A of FIG. 2 ;
  • FIG. 4 is a partial cross-section of an embodiment of a heating coil illustrating the dimensions thereof
  • FIG. 5 is an end view of an embodiment of a heating coil illustrating the dimensions thereof
  • FIG. 6 is a partial cross-section of another embodiment of a heating coil illustrating the dimensions thereof
  • FIG. 7 is an end view of the tubing of another embodiment of a heating coil illustrating the dimensions of the tubing.
  • FIG. 8 is an end view of another embodiment of a heating coil illustrating the dimensions thereof.
  • the heating coil 100 includes a coiled piece of tubing 102 with high thermal transfer capabilities. Such coils are often made of copper, aluminum and other metals.
  • the tubing 102 includes an intake 104 and an exhaust 106 , which may include threaded ends 108 a, 108 b for attachment to the heating and cooling system.
  • the tubing 102 may be supported by a frame 110 .
  • the height L1 of the coils of tubing 102 as measured from a centerline the exhaust 106 and intake 104 , is from about 15.23′′ to about 16′′, and the height L2, a measured from the bottom to the top of the frame 110 , is from about 17.72′′ to about 18.63′′.
  • the coiled tubing 102 is pitched, allowing for a compact design and flow of heat transfer medium through the tubing 102 .
  • the distance D from each coil of tubing 102 is from about 2′′ to about 3′′ and more preferably from about 2.19′′ to about 2.61′′.
  • the tubing 102 between the intake 104 and exhaust 106 , includes a plurality of corrugations 112 , which have a variation of between about 1.392′′ to about 1.601′′. In other embodiments, the variation may lie between about 1.380′′ to about 1.728′′, at the troth of the corrugation 112 , to 1.618′′ to about 2.023′′ at the peak of the corrugation.
  • the corrugated tubing 102 may be formed initially from straight tubing having an exterior diameter of about 1.500′′ and an interior diameter of about 1.375′′.
  • the corrugations 112 maximize surface area between the two heat exchange mediums, enhancing energy efficiency.
  • the outer diameter D2 of the coils of the tubing 102 may be from about 10′′ to about 20′′ or more preferably from about 12.44′′ to about 15.74′′ Other outer diameter of about 13.12′′ and about 17.9′′ are also desirable.
  • the inner diameter D1 of the coils of the tubing 102 may be from about 8.5′′ to about 15′′ or more preferably from about 10.54′′ to about 13.6′′. In other embodiments, the diameter D2 of the coils of tubing 102 may be about 12.25′′.
  • Distance D3, from the coil of the tubing 102 to the intake 104 (or exhaust 106 ) is from about 13.5′′ to about 22′′ or more preferably from about 15.15′′ to about 20.2′′.
  • the thickness of the tubing 102 itself is preferably between about 0.0112′′ and about 0.0148′′.
  • the inner diameter of the tubing 102 itself may be about 1.358′′ to about 1.698′′.
  • the dimensions of the tubing 102 may be varied depending upon the application intended and the system the heating coil 100 may be placed in. Specifically, the dimensions listed herein are for heating applications for odd sized tanks, varying 15′′ to 23′′. Industry standard dimensions are frequently even sizes, ranging 14′′ to 26′′.
  • the heating coil includes dimensions optimal to retrofit a variety of existing water heater systems on the market.
  • the ratio of vari0ous dimension sin the corrugations in relation to the dimensions of the coil of tubing are need for manufacturability and optimal heat transfer.
  • the pitch between corrugations 112 to the inner diameter D1 of the coiled tubing 102 allow for the manufacturability.
  • the heat transfer performance is optimized by the range of ratios between the ⁇ major dimension and ⁇ minor (identified in FIG. 4 as 1.358′′ to 1.698′′) and the ratio of the pitch and wall thickness (identified in FIG. 4 as the dimension from 0.0112′′ to 0.0148′′)
  • the corrugated indirect heating coil provides a novel solution to providing a heat exchange coil that improves over existing heat exchange coils by providing a more energy efficient way of transferring heat between two heat exchange mediums.
  • the corrugations in the tubing provide enhanced surface area, thereby, maximizing the heat exchanged.

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

Abstract

A corrugated indirect heating coil is disclosed. The heating coil includes an intake and an exhaust. Tubing connects the intake and exhaust together in fluid communication. The tubing includes a plurality of corrugations formed thereon to maximize surface area for heat exchange. The tubing is preferably wound into coils and supported by a frame.

Description

    CROSS-REFERENCE TO RELATED APPLICATION
  • This patent document claims priority to earlier filed U.S. Provisional Patent Application No. 61/790,881, filed on Mar. 15, 2013, the entire contents of which are incorporated herein by reference.
    • BACKGROUND OF THE INVENTION
  • 1. Technical Field
  • The present patent document relates generally to water heaters and more specifically to a corrugated indirect water heater coil used in water heaters and other heater transfer appliances.
  • 2. Background of the Related Art
  • Efficient transfer of heat between fluid circulating in a coil to another heat transfer medium, such as heating hot water in hot water heaters or in other HVAC systems, is desirable. The industry is always seeking new ways to minimize energy loss in appliances and maximize heat transfer between heat transfer mediums.
  • Therefore, there is a perceived need in the industry for an improved device for transferring heat in open and closed loop heating systems.
    • SUMMARY OF THE INVENTION
  • The corrugated indirect heating coil solves the problems of the prior art by providing a heater coil that includes corrugations to maximize surface area and, thus, heat transfer, between heat transfer mediums. The mediums may include water to water, steam to water, glycol to water, brine to water, and the like, as is known in the art, and may be used in open and closed loop systems, but is not limited thereto.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • These and other features, aspects, and advantages of the present invention will become better understood with reference to the following description, appended claims, and accompanying drawings where:
  • FIG. 1 shows a perspective view of a heating coil;
  • FIG. 2 is a partial cross-section view of a heating coil tubing
  • FIG. 3 a partial cross-section view of an intake of a heating coil tubing, Inset A of FIG. 2;
  • FIG. 4 is a partial cross-section of an embodiment of a heating coil illustrating the dimensions thereof;
  • FIG. 5 is an end view of an embodiment of a heating coil illustrating the dimensions thereof;
  • FIG. 6 is a partial cross-section of another embodiment of a heating coil illustrating the dimensions thereof;
  • FIG. 7 is an end view of the tubing of another embodiment of a heating coil illustrating the dimensions of the tubing; and
  • FIG. 8 is an end view of another embodiment of a heating coil illustrating the dimensions thereof.
    •  DESCRIPTION OF THE PREFERRED EMBODIMENT
  • Referring to the pages of the drawings, the heating coil is shown generally at 100. The heating coil 100 includes a coiled piece of tubing 102 with high thermal transfer capabilities. Such coils are often made of copper, aluminum and other metals. The tubing 102 includes an intake 104 and an exhaust 106, which may include threaded ends 108 a, 108 b for attachment to the heating and cooling system. The tubing 102 may be supported by a frame 110. The height L1 of the coils of tubing 102, as measured from a centerline the exhaust 106 and intake 104, is from about 15.23″ to about 16″, and the height L2, a measured from the bottom to the top of the frame 110, is from about 17.72″ to about 18.63″. The coiled tubing 102 is pitched, allowing for a compact design and flow of heat transfer medium through the tubing 102. The distance D from each coil of tubing 102 is from about 2″ to about 3″ and more preferably from about 2.19″ to about 2.61″.
  • The tubing 102, between the intake 104 and exhaust 106, includes a plurality of corrugations 112, which have a variation of between about 1.392″ to about 1.601″. In other embodiments, the variation may lie between about 1.380″ to about 1.728″, at the troth of the corrugation 112, to 1.618″ to about 2.023″ at the peak of the corrugation. The corrugated tubing 102 may be formed initially from straight tubing having an exterior diameter of about 1.500″ and an interior diameter of about 1.375″. The corrugations 112 maximize surface area between the two heat exchange mediums, enhancing energy efficiency.
  • The outer diameter D2 of the coils of the tubing 102 may be from about 10″ to about 20″ or more preferably from about 12.44″ to about 15.74″ Other outer diameter of about 13.12″ and about 17.9″ are also desirable. The inner diameter D1 of the coils of the tubing 102 may be from about 8.5″ to about 15″ or more preferably from about 10.54″ to about 13.6″. In other embodiments, the diameter D2 of the coils of tubing 102 may be about 12.25″. Distance D3, from the coil of the tubing 102 to the intake 104 (or exhaust 106) is from about 13.5″ to about 22″ or more preferably from about 15.15″ to about 20.2″.
  • The thickness of the tubing 102 itself is preferably between about 0.0112″ and about 0.0148″. The inner diameter of the tubing 102 itself may be about 1.358″ to about 1.698″.
  • The dimensions of the tubing 102 may be varied depending upon the application intended and the system the heating coil 100 may be placed in. Specifically, the dimensions listed herein are for heating applications for odd sized tanks, varying 15″ to 23″. Industry standard dimensions are frequently even sizes, ranging 14″ to 26″. The heating coil includes dimensions optimal to retrofit a variety of existing water heater systems on the market.
  • Critically, the ratio of vari0ous dimension sin the corrugations in relation to the dimensions of the coil of tubing are need for manufacturability and optimal heat transfer. Specifically, the range of the ratio of 2.023″ (Ømajor) from FIG. 4 to the range identified as 12.44″ to 15.78″ in FIG. 5, and exhibited again in FIGS. 6 and 8, respectively. Additionally, the pitch between corrugations 112 to the inner diameter D1 of the coiled tubing 102 allow for the manufacturability. While the heat transfer performance is optimized by the range of ratios between the Ømajor dimension and Øminor (identified in FIG. 4 as 1.358″ to 1.698″) and the ratio of the pitch and wall thickness (identified in FIG. 4 as the dimension from 0.0112″ to 0.0148″)
  • Therefore, it can be seen that the corrugated indirect heating coil provides a novel solution to providing a heat exchange coil that improves over existing heat exchange coils by providing a more energy efficient way of transferring heat between two heat exchange mediums. The corrugations in the tubing provide enhanced surface area, thereby, maximizing the heat exchanged.
  • It would be appreciated by those skilled in the art that various changes and modifications can be made to the illustrated embodiments without departing from the spirit of the present invention. All such modifications and changes are intended to be within the scope of the present invention except insofar as limited by the appended claims.

Claims (12)

What is claimed is:
1. A heating coil, comprising:
an intake;
an exhaust; and
tubing connecting the intake and exhaust in fluid communication, the tubing including a plurality of corrugations.
2. The heating coil of claim 1, wherein the tubing is wound into a plurality of coils.
3. The heating coil of claim 2, wherein an outer diameter of the coils of the tubing is about 12.44″ to about 15.74″.
4. The heating coil of claim 2, wherein an outer diameter of the coils of the tubing is about 12.25″.
3. The heating coil of claim 2, wherein the coils are supported by a frame.
4. The heating coil of claim 1, wherein the intake includes a threaded end.
5. The heating coil of claim 1, wherein the exhaust includes a threaded end.
6. The heating coil of claim 1, wherein the corrugations have a variation of between about 1.380″ to about 1.728″, at a troth of the corrugation, to about 1.618″ to about 2.023″ at a peak of the corrugation.
7. The heating coil of claim 6, wherein the corrugations have a variation between a troth and a peck of the corrugation of between about 1.392″ to about 1.601″.
8. The heating coil of claim 1, wherein the tubing is formed from straight tubing having an exterior diameter of about 1.5″ and an interior diameter of about 1.375″.
9. The heating coil of claim 1, wherein the tubing has a thickness of between about 0.0112″ and about 0.0148″.
10. The heating coil of claim 1, wherein the tubing has an inner diameter of between about 1.358″ to about 1.698″.
US14/215,685 2013-03-15 2014-03-17 Corrugated indirect water heater coil Abandoned US20140261242A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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US201361790881P 2013-03-15 2013-03-15
US14/215,685 US20140261242A1 (en) 2013-03-15 2014-03-17 Corrugated indirect water heater coil

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Citations (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2976392A (en) * 1953-09-04 1961-03-21 Wabnitz Richard Fluid distributing apparatus
US3692889A (en) * 1970-03-17 1972-09-19 Raybestos Manhattan Inc Method and apparatus for forming corrugated plastic tubing
US4530250A (en) * 1984-04-12 1985-07-23 The United States Of America As Represented By The United States Department Of Energy Method for sampling sub-micron particles
US4677863A (en) * 1984-04-12 1987-07-07 The United States Of America As Represented By The United States Department Of Energy Sub-micron particle sampler apparatus
US4865124A (en) * 1986-02-21 1989-09-12 Dempsey Jack C Shell and coil heat exchanger
US5138693A (en) * 1986-03-26 1992-08-11 E.G.O. Elektro-Gerate Blanc U. Fischer Electric fluid heater with thermosphonic fluid circulation
US5578231A (en) * 1992-06-06 1996-11-26 Barmag Ag Heater for an advancing yarn
US5760374A (en) * 1992-06-06 1998-06-02 Barmag Ag Heating apparatus for an advancing yarn
US5822971A (en) * 1992-08-25 1998-10-20 Barmag Ag Adjustable heating apparatus for an advancing yarn
US6016848A (en) * 1996-07-16 2000-01-25 W. L. Gore & Associates, Inc. Fluoropolymer tubes and methods of making same
US6026801A (en) * 1996-04-30 2000-02-22 Barkan; Kenneth C. Plug core heat exchanger
US6198879B1 (en) * 1999-06-15 2001-03-06 Howard Harris Builders, Inc. Sensor block and automatic fill valve for water heater with immersed copper fluid coil
US20010004009A1 (en) * 1999-01-25 2001-06-21 Mackelvie Winston Drainwater heat recovery system
US20040087885A1 (en) * 2000-03-11 2004-05-06 Takumi Kawano Medical tube and production method and production device therefor and medical appliance
US6736198B2 (en) * 2000-01-26 2004-05-18 Yanwen Zhu Assembling heat exchanger of spiral sleeve
US20040182855A1 (en) * 2002-06-12 2004-09-23 Steris Inc. Heating apparatus for vaporizer
US20050178761A1 (en) * 2004-02-13 2005-08-18 Toshio Wakamatsu Superheated vapor generator
US20060005955A1 (en) * 2004-07-12 2006-01-12 Orr Troy J Heat exchanger apparatus and methods for controlling the temperature of a high purity, re-circulating liquid
US20060201179A1 (en) * 2005-03-09 2006-09-14 Kelix Heat Transfer Systems, Llc Optimized ground loop systems for heat pumps
US20070023163A1 (en) * 2005-03-09 2007-02-01 Kelix Heat Transfer Systems, Llc Coaxial-flow heat transfer structures for use in diverse applications
US20070143914A1 (en) * 2003-12-10 2007-06-28 Matsushita Electric Industrial Co., Ltd. Heat exchanger and washing apparatus comprising the same
US20110236138A1 (en) * 2010-03-24 2011-09-29 Cosban William C Method for repairing and reinforcing underground pipes
US20120160465A1 (en) * 2009-07-06 2012-06-28 Webb Frederick Mark Heat exchanger
US20120175077A1 (en) * 2009-06-09 2012-07-12 Reijer Willem Lehmann Geothermal Heat Exchanger
US20120197363A1 (en) * 2011-01-27 2012-08-02 Medtronic, Inc. Wound Heat Exchanger
US20130206270A1 (en) * 2011-08-16 2013-08-15 James W. Patten Vertically compactable fluid transfer device

Patent Citations (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2976392A (en) * 1953-09-04 1961-03-21 Wabnitz Richard Fluid distributing apparatus
US3692889A (en) * 1970-03-17 1972-09-19 Raybestos Manhattan Inc Method and apparatus for forming corrugated plastic tubing
US4530250A (en) * 1984-04-12 1985-07-23 The United States Of America As Represented By The United States Department Of Energy Method for sampling sub-micron particles
US4677863A (en) * 1984-04-12 1987-07-07 The United States Of America As Represented By The United States Department Of Energy Sub-micron particle sampler apparatus
US4865124A (en) * 1986-02-21 1989-09-12 Dempsey Jack C Shell and coil heat exchanger
US5138693A (en) * 1986-03-26 1992-08-11 E.G.O. Elektro-Gerate Blanc U. Fischer Electric fluid heater with thermosphonic fluid circulation
US5578231A (en) * 1992-06-06 1996-11-26 Barmag Ag Heater for an advancing yarn
US5760374A (en) * 1992-06-06 1998-06-02 Barmag Ag Heating apparatus for an advancing yarn
US5822971A (en) * 1992-08-25 1998-10-20 Barmag Ag Adjustable heating apparatus for an advancing yarn
US6026801A (en) * 1996-04-30 2000-02-22 Barkan; Kenneth C. Plug core heat exchanger
US6016848A (en) * 1996-07-16 2000-01-25 W. L. Gore & Associates, Inc. Fluoropolymer tubes and methods of making same
US20010004009A1 (en) * 1999-01-25 2001-06-21 Mackelvie Winston Drainwater heat recovery system
US6198879B1 (en) * 1999-06-15 2001-03-06 Howard Harris Builders, Inc. Sensor block and automatic fill valve for water heater with immersed copper fluid coil
US6736198B2 (en) * 2000-01-26 2004-05-18 Yanwen Zhu Assembling heat exchanger of spiral sleeve
US20040087885A1 (en) * 2000-03-11 2004-05-06 Takumi Kawano Medical tube and production method and production device therefor and medical appliance
US20040182855A1 (en) * 2002-06-12 2004-09-23 Steris Inc. Heating apparatus for vaporizer
US20070143914A1 (en) * 2003-12-10 2007-06-28 Matsushita Electric Industrial Co., Ltd. Heat exchanger and washing apparatus comprising the same
US20050178761A1 (en) * 2004-02-13 2005-08-18 Toshio Wakamatsu Superheated vapor generator
US20060005955A1 (en) * 2004-07-12 2006-01-12 Orr Troy J Heat exchanger apparatus and methods for controlling the temperature of a high purity, re-circulating liquid
US20060201179A1 (en) * 2005-03-09 2006-09-14 Kelix Heat Transfer Systems, Llc Optimized ground loop systems for heat pumps
US20070023163A1 (en) * 2005-03-09 2007-02-01 Kelix Heat Transfer Systems, Llc Coaxial-flow heat transfer structures for use in diverse applications
US20120175077A1 (en) * 2009-06-09 2012-07-12 Reijer Willem Lehmann Geothermal Heat Exchanger
US20120160465A1 (en) * 2009-07-06 2012-06-28 Webb Frederick Mark Heat exchanger
US20110236138A1 (en) * 2010-03-24 2011-09-29 Cosban William C Method for repairing and reinforcing underground pipes
US20120197363A1 (en) * 2011-01-27 2012-08-02 Medtronic, Inc. Wound Heat Exchanger
US20130206270A1 (en) * 2011-08-16 2013-08-15 James W. Patten Vertically compactable fluid transfer device

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Owner name: HTP, INC., MASSACHUSETTS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:STEPHENS, PHILLIP;REEL/FRAME:032453/0919

Effective date: 20140317

STCB Information on status: application discontinuation

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