US3369593A - Axial flow regenerative heat exchangers - Google Patents

Axial flow regenerative heat exchangers Download PDF

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Publication number
US3369593A
US3369593A US492789A US49278965A US3369593A US 3369593 A US3369593 A US 3369593A US 492789 A US492789 A US 492789A US 49278965 A US49278965 A US 49278965A US 3369593 A US3369593 A US 3369593A
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regenerator
annular
regenerative heat
portions
axial flow
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US492789A
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English (en)
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Brandt Herbert
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    • 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
    • F28D19/00—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium
    • F28D19/04—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium using rigid bodies, e.g. mounted on a movable carrier
    • F28D19/041—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium using rigid bodies, e.g. mounted on a movable carrier with axial flow through the intermediate heat-transfer medium

Definitions

  • This invention relates to rotary regenerative heat exchangers of the kind which includes, inter alia, a substantially cylindrical heat exchange member, referred to hereinafter as a regenerator, which comprises a casing containing a mass of plates or tubes, hereinafter referred to, for convenience, as plates, which provide passages through the regenerator, hot gas being led through the said passages in one direction, substantially parallel to the axis of the regenerator, in order to give up its heat to the said mass, whereafter air is led through the same passages in the opposite axial direction in order to pick up the heat from the said mass.
  • a regenerator which comprises a casing containing a mass of plates or tubes, hereinafter referred to, for convenience, as plates, which provide passages through the regenerator, hot gas being led through the said passages in one direction, substantially parallel to the axis of the regenerator, in order to give up its heat to the said mass, whereafter air is led through the same passages in the opposite axial direction in order to pick up the heat from the said
  • the regenerator rotates about its axis, while the means for supplying said air and hot gas to the regenerator, and for leading the cooled gas and heated air from the regenerator are stationary; in other cases the regenerator is stationary while the said air conducting means rotate about the projected axis of the regenerator.
  • the mass of plates in the regenerator acquire a higher temperature at the axial end (which will be referred to as the hot end) of the regenerator to which the hot gases are supplied and from which the heated air is withdrawn, than at the opposite axial end (which will be referred to as the cold end) of the regenerator from which the cooled gas is withdrawn and the cold air enters.
  • These temperatures differences in the regenerator cause deformation of and stresses in the mass of plates and the regenerator casing which have had to be allowed for, in the design of the heat exchanger, by expensive construction measures.
  • With the present tendency for rotary regenerative heat exchangers to increase in size considerably some regenerators have a diameter of approximately 12 meters, and an axial height of approximately 2 meters), the stresses therein become very considerable.
  • the regenerator tends to assume the form of a calotte, with a concave surface at the cold end and a convex surface at the hot end.
  • the object of the present invention is to provide improvements in regenerators of rotary regenerative heat 3,369,593 Patented Feb. 20, 1968 exchangers whereby to minimise the deformation effects of the differential temperatures of cold and hot ends thereof.
  • a substantially cylindrical regenerator of a rotary regenerative heat exchanger is characterised in that it is formed of a plurality of annular portions which are concentric with each other and are spaced apart radially to provide an annular gap therebetween.
  • FIG. 1 is a diagrammatic sectional elevation of a rotary regenerative heat exchanger
  • FIGS. 2 and 3 are diagrammatic sectional elevations of a regenerator which has been subjected to the differential temperatures
  • FIG. 4 is a diagrammatic sectional elevation of a rotary regenerative heat exchanger embodying a regenerator according to this invention
  • FIG. 5 is a diagrammatic end view of the regenerator included in the heat exchanger shown in F164, looking along the axis thereof;
  • FIG. 6 is a diagrammatic sectional elevation illustrating, in an exaggerated manner, the deformation of the regenerator shown in FIG. 4.
  • FIG. 7 is a fragmentary enlarged diagrammatic sectional elevation of part of FIG. 4.
  • FIG. 8 is a fragmentary plan view corresponding to FIG. 7.
  • a cylindrical regenerator 11 contains a mass 12 of heat exchange plates. Hot gas is supplied to the hot end 13 of the regenerator, in the direction of the arrow 14, through a duct 15, and the gas, after being cooled by transfer of its heat to the mass 12 of plates, leaves the cold end 16 of the regenerator and is led away through a duct 17.
  • Cold air is supplied to the cold end 16 of the regenerator, in the direction of the arrow 18, through a duct 19, and the air, after being heated by transfer of heat from the mass 12, leaves the hot end 13 of the regenerator and is led away through a duct 20.
  • the regenerator 11 may rotate around its axis 21, while the ducts 15, 17, 19 and 20 remain stationary, or the regenerator 11 and the gas ducts 15 and 17 may be stationary while the air ducts 19 and 20 rotate about the projected axis 21. In either event there is relative rotation between the regenerator 11 and the air ducts 19 and 20.
  • the regenerator is made, according to the present invention, in the form shown, by way of example, in FIGS. 4 and 5.
  • the regenerator is constructed of a plurality of separate concentric annular portions. In FIGS. 4 and 5, two annular regenerator portions 22 and 23 are shown, but there may be three or more such annular concentric regenerator portions.
  • annular regenerator portion 22 is surrounded by an outer annular portion 23, the two portions being separated from each other, but connected to each other, so that the two portions are supported relatively to each other, by connecting means 24. Consequently, the two annular portions 22 and 23 will expand and deform independently of each other; they may each assume a substantially calotte formation, and such deformation may assume the form shown, in exaggerated manner, in FIG. 6.
  • the concave cold end surface 16 of the regenerator is broken up (compared with the form shown in FIG. 3) into several separate concave surfaces each of which is of less depth (axially of the regenerator) than the depth of the concave cold end surface shown in FIG. 3; the convex hot end surface 13 of the regenerator similarly is broken up into several separate convex surface portions.
  • FIGS. 7 and 8 are an enlarged fragmentary sectional elevation and plan respectively.
  • a bracket 27 on the inner face of the outer annular portion 23 is engaged by another bracket 28 on the outer face of the inner annular portion 22, and bolts 29 pass through the two brackets.
  • An axial flow regenerator for a rotary regenerative heat exchanger which comprises a plurality of annular regenerator portions concentric with each other and carrying a heat storage mass and means for interconnecting said annular portions so that each portion is'supported relative to each other portion and so that an annular gap between adjacent annular portions is provided and each annular portion is freely adjustable independently of each other annular portion,

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
US492789A 1964-10-03 1965-10-04 Axial flow regenerative heat exchangers Expired - Lifetime US3369593A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA47246A DE1237150B (de) 1964-10-03 1964-10-03 Tragkonstruktion fuer den Waermespeicher von drehenden, axial im Gegenstrom von den Medien durchstroemten Regenerativwaermetauschern

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US3369593A true US3369593A (en) 1968-02-20

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US492789A Expired - Lifetime US3369593A (en) 1964-10-03 1965-10-04 Axial flow regenerative heat exchangers

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US (1) US3369593A (de)
DE (1) DE1237150B (de)
GB (1) GB1108644A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3710851A (en) * 1971-08-19 1973-01-16 Air Preheater Ball-and-socket coupling for rotor
US3710850A (en) * 1971-08-04 1973-01-16 Air Preheater Unrestrained rotor
US6264464B1 (en) 2000-05-12 2001-07-24 Megtec Systems, Inc. Angled bed for regenerative heat exchanger

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1298231B (de) * 1964-12-17 1969-06-26 Kraftanlagen Ag Umlaufender Regenerativ-Luftvorwaermer
DE3106932C2 (de) * 1981-02-25 1985-07-04 Herbert Dipl.-Ing. 5960 Olpe Sandmann Regenerativer Luftvorwärmer mit einem feststehenden Stator und senkrechter Achse bestehend aus Kernwand, Statormantel, Radial- sowie Ringwänden
US4421157A (en) 1982-08-17 1983-12-20 Apparatebau Rothemuhle Brandt & Kritzler Gmbh Stator sector plate for regenerative air preheater

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2432198A (en) * 1945-01-12 1947-12-09 Air Preheater Heat exchange surface for air preheaters
US2503651A (en) * 1946-12-05 1950-04-11 Harry Ralph Ricardo Heat exchanger
US2944798A (en) * 1955-06-22 1960-07-12 Air Preheater Guide plates for rotary regenerator
US3216486A (en) * 1963-09-19 1965-11-09 Air Preheater Rotary heat exchanger
US3301316A (en) * 1964-08-24 1967-01-31 Gen Motors Corp Regenerator matrix

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE818960C (de) * 1949-02-15 1951-10-29 Andrew Thomson Bowden Umlaufender Regenerativ-Waermeaustauscher
DE1118389B (de) * 1954-12-30 1961-11-30 Svenska Rotor Maskiner Ab Luftvorwaermer-Speisewasservorwaermer-Anordnung in Dampferzeugeranlagen
DE1117813B (de) * 1960-07-28 1961-11-23 Babcock & Wilcox Dampfkessel Regenerativ-Luftvorwaermer mit Entlastungsschlitzen im Rotor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2432198A (en) * 1945-01-12 1947-12-09 Air Preheater Heat exchange surface for air preheaters
US2503651A (en) * 1946-12-05 1950-04-11 Harry Ralph Ricardo Heat exchanger
US2944798A (en) * 1955-06-22 1960-07-12 Air Preheater Guide plates for rotary regenerator
US3216486A (en) * 1963-09-19 1965-11-09 Air Preheater Rotary heat exchanger
US3301316A (en) * 1964-08-24 1967-01-31 Gen Motors Corp Regenerator matrix

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3710850A (en) * 1971-08-04 1973-01-16 Air Preheater Unrestrained rotor
US3710851A (en) * 1971-08-19 1973-01-16 Air Preheater Ball-and-socket coupling for rotor
US6264464B1 (en) 2000-05-12 2001-07-24 Megtec Systems, Inc. Angled bed for regenerative heat exchanger

Also Published As

Publication number Publication date
GB1108644A (en) 1968-04-03
DE1237150B (de) 1967-03-23

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