EP2189745A1 - Wärmerückgewinnungsvorrichtung - Google Patents

Wärmerückgewinnungsvorrichtung Download PDF

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Publication number
EP2189745A1
EP2189745A1 EP09176128A EP09176128A EP2189745A1 EP 2189745 A1 EP2189745 A1 EP 2189745A1 EP 09176128 A EP09176128 A EP 09176128A EP 09176128 A EP09176128 A EP 09176128A EP 2189745 A1 EP2189745 A1 EP 2189745A1
Authority
EP
European Patent Office
Prior art keywords
tubular element
water
coil
connector
duct
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Withdrawn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
EP09176128A
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English (en)
French (fr)
Inventor
Giorgio Eberle
Massimo Mazzega
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Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP2189745A1 publication Critical patent/EP2189745A1/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Withdrawn legal-status Critical Current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
    • F28D7/02—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
    • 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
    • F28D21/0005—Recuperative heat exchangers the heat being recuperated from exhaust gases for domestic or space-heating systems
    • F28D21/0007—Water heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2280/00—Mounting arrangements; Arrangements for facilitating assembling or disassembling of heat exchanger parts
    • F28F2280/02—Removable elements

Definitions

  • the present invention relates to a heat recovery device, particularly for stacks of boilers.
  • These devices can be supplied especially with fuels which, by burning, emit combustion gases which are expelled from the flues.
  • the aim of the present invention is to solve the noted technical problems, eliminating the drawbacks of the cited background art, by providing a heat recovery device that allows reduction of the temperature at which the combustion gases of heating boilers are expelled from the flues, improving the thermal yield of the boilers.
  • an object of the invention is to provide a device that makes it possible to reduce, in heating boilers or other heat generators for heating water, the difference in temperature between the input water from the aqueduct and the desired value in output.
  • Another object is to provide a device that makes it possible to reduce the calories needed to heat the water up to the desired temperature in boilers or other heat generators.
  • Another object of the invention is to allow a reduction of the quantity of fine particles emitted by heating boilers into the surrounding environment.
  • Another object is to obtain a device that is effective, structurally simple, and can be provided at low cost.
  • a heat recovery device characterized in that it comprises a tubular element, which is interposed between two ends of a stack or flue and is provided internally with at least one removable coil which has a first input connector which is connected to the aqueduct or to a well and a second output connector for sending the heated water toward devices that are adapted to heat it further or to accumulation tanks.
  • the reference numeral 1 designates a heat recovery device, which comprises a tubular element 2 which is hollow and cylindrical and is interposed between two ends of a flue 3 or stack.
  • the tubular element 2 is provided internally with at least one coil 4 of tubes which can be extracted and has a first connector 5, which is connected to the aqueduct or to a well, for the inflow of water; the first connector 5 is arranged proximately to a lower end 6 of the tubular element 2 and conveys, through a first vertical portion 5a that lies inside the coil 4, the water up to the top of the tubular element 2.
  • the coil of tubes 4 extends until it approximately skims the internal lateral surface of the tubular element 2, forming a series of circular turns, which are supported by a double-comb locking means 7 composed of two pairs of linear flanges 7a, 7b which are mutually opposite and have a series of seats for positioning and resting portions of tube that constitute the coil 4.
  • the locking means 7, shown in Figure 2 is fixed to the tubular element 2 by means of screws 8, which pass through appropriately provided holes formed in said element and which, once unscrewed, allow the simultaneous extraction of the locking means 7 and of the coil 4 by means of a handle 9 that can be gripped by a user since it is arranged transversely to the upper end of the locking means 7.
  • the pipes of the coil 4 are of the non-rigid type, and have the particularity of contracting the coil 4 if the pressure of the fluid contained therein decreases.
  • the path of the coil 4 ends in a second output connector 11, which is arranged at the lower end 6 of the tubular element 2 and enters a first duct 12 for sending the heated water toward accumulation tanks 30 or toward devices that are adapted to heat it further, such as boilers 31 or heat generators.
  • the stream of combustion gases 13 that exit from the boiler 31 are conveyed into the flue 3, which engages the lower end 6 by means of a frustum-shaped portion that tapers along the vertical axis and ends with a third tubular connector 14, which has a circular cross-section and a first opening 15.
  • the stream of combustion gases 13 that enter from the first opening 15 is advantageously conveyed radially in the direction of the coil of tubes 4 by one or more diffuser cones 16, which preferably are three and are arranged along the central axis of the tubular element 2 in order to facilitate better heat exchange between the stream of the combustion gases 13 and the water that flows within the coil of tubes 4.
  • the diffuser cones 16, shown in Figure 3 are fixed to the locking means 7 by anchoring means 17 consisting of two rods 18, which are mutually connected in an X-shaped arrangement and have, at their ends, suitable holes 19 which act as seats for locking screws.
  • the stream of combustion gases 13 is cooled, entailing the appearance of condensation, which is conveniently collected in a condensation recovery means 20 arranged at the lower end 6 in a region that is proximate to the first opening 15, the condensation recovery means 20 preferably having a concave tray-like shape provided with a drain tube 21.
  • the condensation that forms is collected by means of the drain tube 21 in a dust recovery tank 22, which can be inspected and opened for cleaning and is usually arranged below the tubular element 2.
  • the cover 23 is detachably engaged with the upper end 10 of the tubular element 2, for example with a coupling or a threaded closure (not shown in the figures) for allowing easy inspection of the inside of the tubular element 2.
  • Figure 3 shows how the heat recovery device is connected to the flue 3; in particular, it is shown how the flue 3 is engaged in the first opening 15 and continues after the outlet of the second opening 24.
  • Thermometers are placed for checking correct operation and efficiency of the heat recovery device: more precisely, there is a first thermometer 25, which is associated with the first connector 5 for the input of the water that arrives from the aqueduct, a second thermometer 26, which is associated with the second connector 11 at the exit of the water from the tubular element 2, a third thermometer 27 for measuring the temperature of the combustion gases that enter the device 1, which is associated with the third connector 14 of the lower end 6, and finally a fourth thermometer 28 for measuring the temperature of the combustion gases in output, which is placed on the cover 23.
  • a first thermometer 25 which is associated with the first connector 5 for the input of the water that arrives from the aqueduct
  • a second thermometer 26 which is associated with the second connector 11 at the exit of the water from the tubular element 2
  • a third thermometer 27 for measuring the temperature of the combustion gases that enter the device 1
  • a fourth thermometer 28 for measuring the temperature of the combustion gases in output, which is placed on the cover 23.
  • the present heat recovery device can be simply arranged at the output of a boiler 31 and therefore serves a single residential use, as shown in Figure 6 , or inserted in a plurality of modules in a cascade arrangement to serve a plurality of boilers 31, for example in condominiums as shown in Figure 7 .
  • the operation of the device is as follows.
  • the boiler by starting operation both to heat sanitary water and to heat rooms, burns fuel, thus emitting hot combustion gases which are directed to the flue 3.
  • the water that arrives from the aqueduct, at ambient temperature, is not routed directly to the boiler 31 but flows first inside the tubular element 2 interposed between two ends of the flue 3 and only then collects in the boiler 31.
  • the supply water from the aqueduct enters the first connector 5, where there is a first thermometer which measures its temperature, and subsequently begins to flow within the coil of tubes 4.
  • the demand for hot water starts the boiler 31, which emits combustion gases, which enter the flue 3 and pass through the first opening 15, skimming the coil of tubes 4.
  • the stream of combustion gases 13 is guided inside the tubular element 2 by the diffuser cones 16, which add to the stream of combustion gases 13, which previously was substantially vertical, a radial component, thus creating greater turbulence around the coil of tubes 4, thus increasing heat exchange.
  • the water by flowing through the entire coil of tubes 4 in countercurrent, after being conveyed to the top of the tubular element 2 by means of the first connector 5, acquires heat from the combustion gases which reach the second output connector 11 at the lower end 6 with a higher temperature than that of the water that arrives from the aqueduct.
  • the water After flowing through the entire device, the water enters the boiler 31, thus requiring fewer calories for further heating up to the desired temperature.
  • the hot combustion gases at the output of the boiler 31 undergo cooling before they are introduced in the environment, leading to a suppression of emitted fine particles.
  • Condensation caused by heat exchange can in fact form inside the tubular element 2 and, by descending in countercurrent with respect to the stream of combustion gases 13, captures the fine particles, collecting in the condensation recovery means 20.
  • the generated condensation which contains the impurities of the combustion of the gases, descends from the condensation recovery means 20 through the drain tube 21 down to the particle recovery tank 22, which can be inspected and opened for cleaning.
  • impurities can form which can deposit on the outer surface of the coil of tubes 4, thus reducing heat conductivity between the tubes and the stream of combustion gases 13.
  • the stream of hot combustion gases 13 heats the water that is present inside the coil of tubes 4, making it available at a higher temperature for subsequent use.
  • One possible arrangement of the heat recovery device can provide for the presence of the accumulation tank 30, which is arranged so as to receive the water in output from the tubular element 2 before it is conveyed into the boiler 31.
  • the accumulation tank 30 has a fifth thermometer 38 for measuring the temperature of the water contained therein.
  • the accumulation tank 30 further has a third delivery duct 33, which is arranged in the upper region; the third duct 33 continues by splitting into a fourth duct 34 for entering the boiler and a fifth duct 35 which ends with a first redirection valve 36, which is arranged in the pipe of the aqueduct 37, which in turn is connected to the first connector 5 of the tubular element 2.
  • the accumulation tank 30 receives water at a higher temperature than the water of the aqueduct if the heating system is in operation.
  • the first redirection valve 36 is activated automatically, preventing the inflow of the water of the aqueduct in the tubular element 2, and simultaneously the circulation pump 32 is started, allowing the water of the accumulation tank 30 to flow within the tubular element 2, circulating within the closed circuit formed between the accumulation tank 30 and the device 1, in turn being heated and being thus ready for any subsequent use.
  • the device can also be inserted horizontally and can thus adapt to any arrangement of the flue 3.
  • the device that has just been described has a heat exchange in countercurrent, but it is also possible to achieve heat exchange in equicurrent if this is more favorable for operating reasons.
  • the device therefore makes it possible to recover the heat of the stream of combustion gases by heating the sanitary water before it enters the boiler, reducing considerably the difference in temperature between the water that arrives from the aqueduct or well and the temperature desired by the user.
  • the invention has achieved the intended aim and objects, a device having been devised which makes it possible to reduce energy consumption and reduce emissions of fine particles generated by combustion in order to obtain hot water to be used for industrial or civil purposes.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Fluid Heaters (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
EP09176128A 2008-11-24 2009-11-16 Wärmerückgewinnungsvorrichtung Withdrawn EP2189745A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000151A ITTV20080151A1 (it) 2008-11-24 2008-11-24 Dispositivo per il recupero del calore.

Publications (1)

Publication Number Publication Date
EP2189745A1 true EP2189745A1 (de) 2010-05-26

Family

ID=41264174

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09176128A Withdrawn EP2189745A1 (de) 2008-11-24 2009-11-16 Wärmerückgewinnungsvorrichtung

Country Status (3)

Country Link
US (1) US20100126432A1 (de)
EP (1) EP2189745A1 (de)
IT (1) ITTV20080151A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2693146A1 (de) * 2012-08-03 2014-02-05 Dworek Polski Sp.J. Wärmetauscher für Abwassersteigrohr
CN111435034A (zh) * 2019-01-15 2020-07-21 芜湖美的厨卫电器制造有限公司 换热设备

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8091514B2 (en) * 2007-11-09 2012-01-10 Jesus Martinez Jimenez Energy re-claimer
US20130256423A1 (en) * 2011-11-18 2013-10-03 Richard G. Lord Heating System Including A Refrigerant Boiler
KR101275346B1 (ko) * 2011-12-23 2013-06-17 포스코에너지 주식회사 연료전지용 열교환기
US10012413B2 (en) 2014-04-15 2018-07-03 Ecr International, Inc. Heat exchanger
US9897385B2 (en) 2015-02-20 2018-02-20 Therma-Stor LLC Helical coil heating apparatus and method of operation
US20180141285A1 (en) * 2016-11-23 2018-05-24 William Carter Davis Techniques for manufacturing and cooling three-dimensional objects
US10647060B2 (en) 2016-11-23 2020-05-12 Shapeways, Inc. Techniques for manufacturing and cooling three-dimensional objects
US10514206B2 (en) * 2017-02-24 2019-12-24 Intellihot, Inc. Multi-coil heat exchanger
DE102017124711A1 (de) * 2017-10-23 2019-04-25 Westfälische Wilhelms-Universität Münster Luftkühler
US11644246B2 (en) * 2017-11-29 2023-05-09 Condevo S.P.A. Heat exchange cell and method
US11353270B1 (en) * 2019-04-04 2022-06-07 Advanced Cooling Technologies, Inc. Heat pipes disposed in overlapping and nonoverlapping arrangements

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US685835A (en) * 1901-01-08 1901-11-05 Andrew Groh Combined stove and water-heater.
US1841361A (en) * 1928-11-14 1932-01-19 Niagara Blower Co Air heater and method of making the same
US2252046A (en) * 1938-10-17 1941-08-12 William L Steele Furnace
US2521462A (en) * 1945-08-09 1950-09-05 Harry X Kinzelmann Water heater
US3231016A (en) * 1963-11-26 1966-01-25 American Mach & Foundry Heat recovery silencer
US4043014A (en) * 1975-11-11 1977-08-23 Wilson John C Method of making a waste flue heat recovery device
US4143816A (en) * 1976-05-17 1979-03-13 Skadeland David A Fireplace heating system
US4175518A (en) * 1978-02-21 1979-11-27 Reames Cedric Ted A Jr Preheater device for hot water heaters
DE2941989A1 (de) * 1979-10-17 1981-05-07 Hanns W. 8104 Grainau Lücke Vorrichtung zur agbaswaermerueckgewinnung
DE3146877A1 (de) * 1981-11-26 1983-06-01 Ludwig 8900 Augsburg Geiger Vorrichtung zum erwaermen von wasser
US4498524A (en) * 1977-08-08 1985-02-12 Jacobsen Orval E Heat exchanger with by-pass
EP0351247A2 (de) * 1988-07-15 1990-01-17 Roberts, E. Dawson Wärmerückgewinnung aus Abgasen
US20020189798A1 (en) * 2001-06-01 2002-12-19 Sidney Jacobs Combination cook stove heat exchanger, filter, and recirculation assembly

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3603384A (en) * 1969-04-08 1971-09-07 Modine Mfg Co Expandable tube, and heat exchanger
US4073045A (en) * 1973-01-16 1978-02-14 Aktiebolaget Atomenergi Convector for heating rooms
US4037567A (en) * 1976-01-15 1977-07-26 Torres Peter L Water heating system including recycle loop
US4406402A (en) * 1981-04-28 1983-09-27 Joseph Henriques Flue heat recovery system
US4887586A (en) * 1981-12-21 1989-12-19 Walters Lonnie D Heat recovery apparatus
US6866036B2 (en) * 2003-07-31 2005-03-15 Eugene Albert Jacobs Cooking heat absorber

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US685835A (en) * 1901-01-08 1901-11-05 Andrew Groh Combined stove and water-heater.
US1841361A (en) * 1928-11-14 1932-01-19 Niagara Blower Co Air heater and method of making the same
US2252046A (en) * 1938-10-17 1941-08-12 William L Steele Furnace
US2521462A (en) * 1945-08-09 1950-09-05 Harry X Kinzelmann Water heater
US3231016A (en) * 1963-11-26 1966-01-25 American Mach & Foundry Heat recovery silencer
US4043014A (en) * 1975-11-11 1977-08-23 Wilson John C Method of making a waste flue heat recovery device
US4143816A (en) * 1976-05-17 1979-03-13 Skadeland David A Fireplace heating system
US4498524A (en) * 1977-08-08 1985-02-12 Jacobsen Orval E Heat exchanger with by-pass
US4175518A (en) * 1978-02-21 1979-11-27 Reames Cedric Ted A Jr Preheater device for hot water heaters
DE2941989A1 (de) * 1979-10-17 1981-05-07 Hanns W. 8104 Grainau Lücke Vorrichtung zur agbaswaermerueckgewinnung
DE3146877A1 (de) * 1981-11-26 1983-06-01 Ludwig 8900 Augsburg Geiger Vorrichtung zum erwaermen von wasser
EP0351247A2 (de) * 1988-07-15 1990-01-17 Roberts, E. Dawson Wärmerückgewinnung aus Abgasen
US20020189798A1 (en) * 2001-06-01 2002-12-19 Sidney Jacobs Combination cook stove heat exchanger, filter, and recirculation assembly

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2693146A1 (de) * 2012-08-03 2014-02-05 Dworek Polski Sp.J. Wärmetauscher für Abwassersteigrohr
CN111435034A (zh) * 2019-01-15 2020-07-21 芜湖美的厨卫电器制造有限公司 换热设备

Also Published As

Publication number Publication date
ITTV20080151A1 (it) 2010-05-25
US20100126432A1 (en) 2010-05-27

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