WO1981000760A1 - Systeme de recuperation de chaleur - Google Patents

Systeme de recuperation de chaleur Download PDF

Info

Publication number
WO1981000760A1
WO1981000760A1 PCT/US1980/000443 US8000443W WO8100760A1 WO 1981000760 A1 WO1981000760 A1 WO 1981000760A1 US 8000443 W US8000443 W US 8000443W WO 8100760 A1 WO8100760 A1 WO 8100760A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat exchanger
heat
scroll
plys
dome
Prior art date
Application number
PCT/US1980/000443
Other languages
English (en)
Inventor
A Kramert
Original Assignee
A Kramert
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 A Kramert filed Critical A Kramert
Priority to DE8080901047T priority Critical patent/DE3067413D1/de
Priority to CA352,998A priority patent/CA1113816A/fr
Publication of WO1981000760A1 publication Critical patent/WO1981000760A1/fr

Links

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
    • 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
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/04—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being formed by spirally-wound plates or laminae

Definitions

  • My invention is a system of mechanical apparatus for the recovery of waste heat from smokepipes, chimneys or stacks using natural draft.
  • Prior means for improving the heat output of natural draft stoves, boilers, furnaces or fireplaces have made use of the following means: air blown through tubular grates set in the fire; heat exchanger and fan units have been mounted in the smokepipe (Magic Heat); thermal wheels have been used in large capacity commercial applications (Ljungstrom Air Preheater Co.); literature describes the horizontal phasechange heat pipes. Prior art is all limited by the need to keep the stack temperatures hot enough - and thus wasteful - to maintain adequate draft.
  • My invention uses a special heat exchanger mounted on a stack or chimney and baffled so that the gases go up thru the core and down thru the exchanger before release to the atmosphere.
  • the reclaimed heat is transferred to liquid which is circulated to just those areas where it is desired.
  • the heat obtained from fireplaces and stoves is greatly increased and without the aesthetic violence of blowers, heat tubes, or the sheer physical bulk of surface.
  • Some metals in the stainless steel series while they are acid resistant, have poor thermal conductivity and thus do not lend themselves to fabrication as finned tubing where the heat travel is a relatively long path.
  • Sheet 1 of the drawings shows a vertical section thru the equipment and a schematic of the other system elements.
  • the exchanger unit either sits on top of a leveled masonry chimney or is supported to embrace a flue.
  • the basic elements are: a torus shaped condensate pan (l); a heat exchanger scroll (2); a jacket around the scroll (3); a hinged cap (4) which is tensioned to open by a spring; the cap incorporates a dome (5) and a filler cap (6); short flexible hoses lead from the exchanger outlet (7) to the dome and from the dome (8) down to piping which leads to a pump; hose (9) runs to tubing which leads to bottle (10).
  • the pump circulates the heated water through any conventional heating system or device, such as baseboard heaters, convectors, radiators, unit heaters, etc. or even to a hot water storage tank. This, via supply line (11) and return (12).
  • any conventional heating system or device such as baseboard heaters, convectors, radiators, unit heaters, etc. or even to a hot water storage tank. This, via supply line (11) and return (12).
  • Bottle (10) is open and sized to hold the volume of liquid displaced by expansion plus the small volume in dome (5).
  • the liquid in the dome is expelled automatically upon the generation of any steam - as would follow upon any power failure.
  • the cap, now unloaded, is opened by the aforementioned spring.
  • the exchanger is by-passed and no liquid is boiled off or wasted out of the system.
  • Sheet 2 of the drawings shows the construction of the heat exchanger itself. This begins as a two ply sandwich of metal strip (figure 1); these are embossed, fitted with liquid connections and rolled into a spiral scroll (figure 3); the scroll is inserted into the jacket (figure 4 ) which protects the scroll from abuse and resists the "hoop stress" or the spring back of the scrol 1. Best Mode For Carrying Out The 1 nve ⁇ t ion
  • One set of rolls impresses shallow tits to the interior of the sandwich (21); the other set of rolls impresses larger and wider spaced dimples to the outside of the sandwich (22).
  • the small tits establish a liquid channel and will be on the concave face of the scroll; the larger dimples maintain a gap for the gases. Both patterns serve to rigidize and strengthen a metal gauge chosen for economy and light weight.
  • the edges of the lapped sheets are run thru the wheels of a resistance seam welder or a high frequency resistance welder.
  • the skew cut (fig. 5) is parallel with the dimples and the liquid connection cuff (24) is inserted here.
  • This piece is bench welded by Tungsten Inert Gas with filler metal, or alternately by Metal Inert Gas wire feed to embrace the half nipple (23).
  • This cuff is a heavier gauge, say, .0375 inch (1mm plus).
  • the cuff wraps around the nipple but gradually blends off in a tapering run until it is pinched flat at the other end (24).
  • a machine seam is run across the skew to join the thin skins to the heavier cuff, with a temporary copper chill sheet inserted (25) thru the end of the sandwich and then withdrawn and the end welded shut.
  • the top nipple, the outlet nipple should not be inserted deeper than 1 cm. into the sandwich. The whole is now rolled into a spiral scroll and leak tested. If quality control has been good, the scroll should be inserted into the jacket and then tested. The test is made by admitting only low pressure air to one of the ports with the other capped, and submerged in lukewarm water with a wetting agent added.
  • the interior of the jacket should have no sharp edges or protrusions to gouge the exchanger scroll which may be withdrawn for ease of c l ean ⁇ ng .
  • Connection (13) is a stub tube inserted low so that condensate may be drained off if desired.
  • a weatherproof, snap-acting thermostat set for 140° F (60° C) is surface mounted on the exterior of the jacket anywhere close under the cap - preferably near the hinge. This is to start and stop the pump when a manual-automatic switch is set to automatic position.
  • the dome (5) has three functions: it is an air-separation chamber where air swept out from anywhere in the whole heating system will be trapped out; it has a small superheating effect; it is an unloader to prevent boiling off liquid if the power supply were interrupted or the heating system could not absorb as much heat as was produced. If steaming occurs, the liquid in the dome is forced out via hose (9) to small diameter tubing which runs to bottle (10) thru check valve (14) which has a controlled leak in the reverse flow direction. When vapor condenses in the dome, it allows the return of liquid over a period of say half an hour to overcome the spring and again test for excessive heat. Incidentally, the cap in an open position without any firing going on, is a signal of air in the system to be bled out.
  • the liquid in the heating system can well be clean, filtered rain water with only enough ethylene glycol type anti-freeze added to protect against minimum temperatures. This does not preclude other precautions against freezing which can be used.
  • the pump of choice selected for prototype models may be of interest. It is not universally known that small centrifugals a re available with magnetically coupled drives which eliminates weeps from stuffing boxes or mechanical seals which may develop over years of service. Such pumps also protect themselves in that the impeller declutches should grit from a dirty piping system be entrained.
  • PE/NE future fuel costs as % of PFC; and when worked out for typical usages we have:
  • Wood, stove 50% / 95% .526

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Supply (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

Appareil de recuperation de chaleur provenant de gaines et de cheminees, utilisant une spirale d'echange de chaleur (2) montee au sommet des cheminees consistant en paires de plaques, espacees par des parties deformees (21, 22) pour definir des canaux d'ecoulement d'un liquide a chauffer. Une chemise (3) entourant la spirale (2) est formee par un dome (5) ayant un chapeau remplisseur (6). La spirale (2) est connectee au dome (5) par des conduites et une sortie du dome (8) connectee a une pompe qui fait circuler l'eau chauffee vers un systeme de chauffage a l'aide de canalisations d'alimentation (11) ou a d'autres zones en faisant revenir le liquide a la spirale (2) par une canalisation de retour (12). La chaleur sensible ainsi que la chaleur latente de l'humidite contenue dans les combustibles ainsi que la vapeur produite comme produit de combustion peuvent etre epures. Le but est de realiser des economies et de reduire la pollution ambiante lorsque des combustibles sont brules.
PCT/US1980/000443 1979-09-10 1980-04-18 Systeme de recuperation de chaleur WO1981000760A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE8080901047T DE3067413D1 (en) 1979-09-10 1980-04-18 Heat recovery system
CA352,998A CA1113816A (fr) 1979-09-10 1980-05-29 Systeme recuperateur de chaleur

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US7402079A 1979-09-10 1979-09-10
US74020 1979-09-10

Publications (1)

Publication Number Publication Date
WO1981000760A1 true WO1981000760A1 (fr) 1981-03-19

Family

ID=22117205

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1980/000443 WO1981000760A1 (fr) 1979-09-10 1980-04-18 Systeme de recuperation de chaleur

Country Status (3)

Country Link
EP (1) EP0035994B1 (fr)
DE (1) DE3067413D1 (fr)
WO (1) WO1981000760A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201402193D0 (en) * 2014-02-07 2014-03-26 Laberge Sylvain Baseboard for use in preheating water

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2663549A (en) * 1950-07-14 1953-12-22 Griscom Russell Co Spiral heat exchanger
US3278122A (en) * 1964-03-02 1966-10-11 Laing Vortex Inc Central heating systems
US4089370A (en) * 1975-06-05 1978-05-16 Bertin & Cie Compact heat-exchanger for fluids

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3124197A (en) * 1964-03-10 Addmxnal spaces in home a
DE1913226B1 (de) * 1969-03-15 1970-08-27 Krupp Gmbh Aus Hohlscheiben bestehender Waermeaustauscher
US4066210A (en) * 1975-05-20 1978-01-03 Pemberton Alonza R Chimney heat reclaimer
FR2344804A1 (fr) * 1976-03-17 1977-10-14 Fimec Echangeur de recuperation thermique
DE2733590A1 (de) * 1977-07-26 1979-02-01 Balcke Duerr Ag Rohrfoermiger waermetauscher
DE2901690C2 (de) * 1979-01-17 1980-07-03 Gebr. Otto Kg, 5910 Kreuztal Abdeckhaube für Schornsteine
DE2935543A1 (de) * 1979-09-03 1981-03-19 Dieter Pomplun Bewegliche kaminabdeckung mit waermerueckgewinnungs- und waermespareffekt

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2663549A (en) * 1950-07-14 1953-12-22 Griscom Russell Co Spiral heat exchanger
US3278122A (en) * 1964-03-02 1966-10-11 Laing Vortex Inc Central heating systems
US4089370A (en) * 1975-06-05 1978-05-16 Bertin & Cie Compact heat-exchanger for fluids

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0035994A4 *

Also Published As

Publication number Publication date
EP0035994A4 (fr) 1982-07-12
DE3067413D1 (en) 1984-05-17
EP0035994B1 (fr) 1984-04-11
EP0035994A1 (fr) 1981-09-23

Similar Documents

Publication Publication Date Title
CN101140148A (zh) 一种烟气余热回收方法及其装置
US4681085A (en) High condensing recuperative furnace
US4449571A (en) Heat recovery system
WO1981000760A1 (fr) Systeme de recuperation de chaleur
CA1113816A (fr) Systeme recuperateur de chaleur
US4726353A (en) High condensing recuperative furnace
CN208671767U (zh) 一种锅炉余热利用装置
RU2409793C2 (ru) Водогрейный котел
CN203719469U (zh) 一种承压烟气余热交换器
US4120267A (en) Tube and plate heat exchanger
CN206656631U (zh) 一种板式气气热交换器
CN105066434B (zh) 直接接触式余热回收常压一体炉
EP3988199A1 (fr) Refroidissement graduel et nettoyage simultané de gaz de combustion
CN2516887Y (zh) 相变采暖炉
CN210107756U (zh) 一种高效冷凝锅炉换热器
US4470542A (en) Single closed loop fireplace home heating system
Reay The Perkins Tube—a noteworthy contribution to heat exchanger technology
CN206959344U (zh) 一种燃气常压热水锅炉烟气冷凝器
RU100594U1 (ru) Котел для отопления и горячего водоснабжения, теплообменник котла и буферная емкость котла
CN201116731Y (zh) 一种烟气余热回收装置
CN209655343U (zh) 一种组合式空气预热器
CN103542524B (zh) 冷凝卧式水套加热炉
CN202747617U (zh) 冷凝卧式水套加热炉
CN109812795A (zh) 一种热交换系统
EP0024064B1 (fr) Dispositif complémentaire pour une installation de chauffage

Legal Events

Date Code Title Description
AK Designated states

Designated state(s): DK JP NO

AL Designated countries for regional patents

Designated state(s): AT CH DE FR GB LU NL SE

WWE Wipo information: entry into national phase

Ref document number: 1980901047

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1980901047

Country of ref document: EP

WWG Wipo information: grant in national office

Ref document number: 1980901047

Country of ref document: EP