US2645462A

US2645462A - Plate type heat exchanger

Info

Publication number: US2645462A
Application number: US144927A
Authority: US
Inventors: Holm Sven
Original assignee: Air Preheater Co Inc
Current assignee: Alstom Power Inc
Priority date: 1950-02-18
Filing date: 1950-02-18
Publication date: 1953-07-14
Anticipated expiration: 1970-07-14

Description

l.luly14,1953 I Smm PLATE fm: fm1" mmm Filld FOb. 18, 1950 llllllllllllllllllllllllllll a INVENTOJL Src/7 Ho/m Patented `Julyliri, 1953 UNITED STAT Y PLATE TYPEHEAT Exormricain` Sven Holm, `Wellsville,y N. Y., assigner t`oA The e VIreheater Corporation, New York, N.`Y.

i Application February is, 195o, seriaiNo.144,927V i The present invention relates toheatexchange for the exchange of heat between two con'ned i 4 Claims. (C1. 257-245) Y apparatus and especially to plate type exchangers fluids with particular referenceA to novel components for building up the heat exchange en velopes usually formed by plates. Y. 1

In a heat excl'iafnger4 of the plate type wherein `heatis exchanged between `one fluidV such as a hot gas'that flows in alternate passages While other fluid to be heated fiows in the intermediate passages, metallic plate members are mounted in spaced-relation to create so-called envelopes defining the fluid passages.` In some heat ex- .changers of this type the walls of the gas passages are provided with extended surface in the form of ns `for increasing the heat transfer .froml the gas to and through the `Wall to `the air in the adjoining passages.

The present invention contemplates building up a heat exchange envelope having finned surface in gas passages from a plurality of like components each consisting of a pair of metallic In Figure l the numerals I andA II Vdesignate a pair of metallicchannels mounted in opposed relation so that the outer faces ofV their bases I2 Vface each other with their peripheries registering and the leg or fiange portions I3,4 I4 of the channels extendingoutwardly with relation to the bases. Mounted between theY bases I2 of the channel members IIJ and I I and extending in; the direction of their longitudinal axes is a metallicl Wire bent tosinusoidal form so that the leg `portions I Bof the U-shaped loops formed therein extend back and forth in upright relation between theY bases I2 of the channels While theY intervening stretcher portions I6. of the loops are in Contact .with' the channels and bonded there- Y to in good heat transfer relation as bywelding.

The bases I2 of the channels I0, I I maybe formed with grooves or recesses I9 to receive the stretcher portions IB that intervene between the fin-form` ing legs I5 of the sinusoidal loops. The leg portions I5 of the loop thus form iins that constitute extended surface for the channel bases I2 channel members whosebases form parts of the Y walls of the heat exchange passage with sinuously bent Wires extending back and forth Vin upright relation in the passage and secured to the basesV of the channel members of the component.` A Y,

plurality of such components are mounted inside by side relation so thatv the bases of the channel members form continuous surfaces that constitute the walls bounding the gas passage, for example, and separating it from the air passages at either side-into Which the fiange portions of the channel member extend to constitute continuous extended surface in these passages.Y l

The invention will be best understood upon4 consideration of the following detailed description of illustrative embodiments thereof when Vread in conjunction with the accompanying drawings in which:

. `Figure l is a perspective view of part of one of the heat exchange components embodying the present invention.

FigureZ is a sectional elevational view of part of a heat exchanger in which the envelopes that form the gas and air passages are made up of channel components in accordance with lthe pres- K entinvention.

Figure 3 isa View similar to Figure 2 but illustrating the envelopes of the exchanger arranged for transverse flow of the fluids between which heat is exchanger, and

' Figure 4 is a fragmentary perspective view of an envelope for heat exchanger embodying an alternate arrangement for securing the channel components together to `form an envelope.

I bers I0, II joined by fins I5 are mounted. in side that form vparts of the walls bounding the airgas passages I'I, I8 of a heat exchangerrwhen a plurality of these components designated as a Whole by the reference numeral I9 are joined toV form arifenvelope for a heat exchanger as illustrated in Figs. 2, 3 and 4.

As illustrated in Fig. 2 in order to form a heat exchange envelope a number of the components I9 each consisting of a pair of channel mema groove 2IV open on the side facing the base I2 and designed to receive the oppositely positioned flange Idof the contiguous channel member. When a plurality of components have thus beenassembled to form a heat exchange envelope they may 4be brazed together so thaty bonds 22 are formed between the abutting4 portions of the base parts of contiguous channels as Wellas between. the flange parts I3,.2 that form the grooves`2| and the iianges I4 of contiguous channels that are received therein. ToV

form a complete heat exchanger' a plurality of` envelopes, designated 23 in Fig. 2, are mounted within a casing 22 and supported in any suit- 'to the Vlips 20 on the flanges I3.

able manner so the air passages I'I alternate with gas passages I8 with the leg portions I5 of the Y sinusoidally bent Wiresconstituting ns of the wall surfaces facing the gas passages whiletheflanges I3, I4 as well as the lips 20 of the former flanges constitute continuous ns extending longitudinally in the air passages. The inlet and outlet ends of the gas and airV passages are con- I VnestedV in conventional fashion to distributing boxes or headers. When heat is to be exchanged between the fluids in counterflow relation, plates Y are mounted in the channels ZI of the two components at the extreme ends of the envelopes 23 and may be integrally bondedito the latter in the brazing step when the envelope is formed.V

For this purpose the channel component at one end of the envelope has Vgroove forming llips 2E provided Von the channel flanges I3 in additionfluids flow transversely of each other, Fig. 3, such plates areV not required at the ends of the envelopes but the latterare sealed at zito the Where the l j joining the said contiguous flanges of the chantions'between which are mounted metallic wires bent to sinusoidal form tcprovidea pluralityof l -lJ-shaped loops therein withthe leg portions ex- Y tendingin uprightrelation lbetween said channel bases as fins and with the intervening yoke portions that' are contiguous along the axis of each Wirein contact with and bonded to the base portion of one or the other of said channels with lip lportions on one flange of each channel yformed margins of inlet openings 28 for the heating gas..

.andA alsocorresp-onding outlet openings.

In Fig. Lithe ilanges YI3 of tnechannels ar not provided with lips to embrace the channels I4 of contiguousV components butthese flanges being in abutting relationare joined together by a weld 39. along the outerend edges of the flanges.

What I claim isz,

1. A heat exchange envelope made up of a plurality of Vsimilar components each consisting of a pair'of. channel members mounted in 0pposed relation with their side'flanges extending outwardly with relation t0 the interveningbase portions between which. are mounted metallicv wires bent to sinusoidal form to provide a plurality of U-shaped loops therein with the legY portions extending in upright relation between said channel bases as fins and with the intervening yoke portions that are contiguous along the axis of each wire in contact-with and bonded to the base portion of one or the other of said channels with lip portions on one flange of each channel formed in re-entrant fashion parallel to the outer face of said one flange to provide va groove for receiving the opposite ange element of the corresponding channel of the adjacent component for interlocking adjacent components so that the bases of their channels align to form continuous surfaces constituting the walls of a passage in which said ns are located.

2. A heat exchange envelope made up of a plurality of similar components each consisting of a pair of channel members mounted in opposed relation with their side ilanges extending outwardly with relation to the intervening base portions between which are mounted metallic wiresbent to sinusoidal form to provide a plurality of U-shaped Vloops therein with the leg portions extending in upright relation between said channel bases as fins'and with the intervening yoke portions that are contiguous along tween one fluid passage in which said fins are located and adjacent passages at either side thereof Vin which the flanges of said channels constitute continuous longitudinal ns extending in the directionrof fluid flow; and means in. re-entrant fashion parallel to the outerface of said one flange to provide a groove'for ieceivl ing the opposite flange element-of thefcorresponding/channel of .the adjacent component for inter, locking adjacent 'components so that the bases of- Ytheir channels align to formcontinuous surfaces constituting the walls of a passage in which 'said continuous surfaces constituting the walls of'a- 0 Number fins are located, the grooves formedby the lips on flanges of the two confronting components thatform parts of the opposite' walls of theenl velope aligning withA each otheri and a vplatemember having opposite marginal edge portions received in the aligned grooves of thecomponents at the extreme ends of said passage with the body of said plate bridging the space between. the

bases of the channels of said components for closing the ends of said passage.

1. A heat exchange envelope made Aup of a plu.

rality of similar components each consisting of a pair of channel members mountedin opposedy relation with their side flanges extending out-V wardly with relation to the intervening' base por-`y tions with lip portions on one iiange of each channel formed in re-entrant fashion parallel to- Ythe outer face of said one flange to provide Aa groove for receiving the opposite flange element kof the corresponding'channel of the adjacentv passage, the grooves formed by the lips on flanges of the two confronting components that form parts of the opposite walls of the envelope alignmg with eachother; and a plate member havingf` opposite marginal edge portions received in the SVENV HOLM. l

References Cited in the le of this patent UNrrED STATES PATENTS V Name YDate Rasner i July V26, 1904 Number Gloyer Apr. 6, 1948 2,505,619

Y Holm Apr. 25, 1950 FOREIGN PATENTS Y Country Date 'Y 233,547 l 452,231

Smith Mar. 10, 1936 Y Great Britain ;1 May 14, 1925 Great Britain Aug. 19, 1936-'V Great lBritain Feb. 3,1944