US1058896A - Means for heating or cooling fluids. - Google Patents

Description

O. A. PARSONS, S. S. COOK & L. M. DOUGLAS. MEANS FOR HEATING OR COOLING FLUIDS.

APPLIOATIQN FILED mums. 1912.

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UNITED s'rATEs PATENT OFFICE.

COOK AND LOUIS MORTIMER DOUGLAS, OF WALLSEND, ENGLAND; SAID COOK AND DOUGLAS ASSIGNORS TO SAID PARSONS. I

MEANS FOR HEATING OR COOLING FLUIDS.

Specification of Letters Patent.

Application filed June 25, 1912. Serial No. 705,874.

To all whom it may concern:

Be it known that we, CHARLES ALGERNON PARSONS, K. C. B., a subject of the King of Great Britain and Ireland, and residing at Heaton \Vorks, Newcastle-upon-Tyne, in the county of Northumberland, England, and STANLEY SMITH (1001; and Lows MORTI- MER DOUGLAS, subjects of the King of Great Britain and Ireland, and residing at Turl inia lVorks, VVallsend-upon-Tyne, in the county of Northumberland, England, have invented certain new and useful Improvements in and Relating to Means for the Heating or Cooling of Fluids, of which the following is a specification.

This invention relates to means for transmitting heat between fluids and-relates par-- ticularly to oil or like coolers of 'the type in which the oil'is passed through a tube surrounded by a heat absorbing fluid. It is well known that in such apparatus the rate of heat transmission is greatly increased by restricting the passage for the flow of fluid through the tube by means of a core of irregular form which acts to change frequently the direction of flow and which, when made of good heat conducting material, further facilitates the heat transmission.

The object of the present invention is to effect further improvements in such means.

The invention consists in heat transmis sion means of the above typein which the core inserted Within each of the tubes is formed at intervals along its length with flats whichare situated iii-central planes of the tube and have their edges contacting with said tube.

The invention also consists in the heataccording to the present invention. Figs. 2

and v3 are transverse sections on the lines A-A and BB of Fig. 1 respectively, while Figs. 4 and 5 are similar transverse sections of a slightly modified form of the device. I

'One method of carrying the invention into effect is described asapplied to apparatus for cooling oil which has been used,

The oil is passed through one or more tubes suitably arranged usually within a vessel containing liquid or fluid maintained at a much lower temperaturethan the oil and thus acting as a heat absorbing medium, while each tube contains a core for the purpose of increasing the rate of heat transmission. A convenient form'of such a core, a according to'the present invention is shown in Figs. 1, 2, and 3, and is readily made by crushing or flattening a metal tube of ductile material at suitable intervals along its length in such a manner that the alternate flats, b, thus produced are at right angles to the intervening flats, 0, and, as nearly as possible, lie in central planes, l, d, and e, 6, containing the axis, f, f, of the tube 9, into which tube the core is inserted. The inner walls'of the crushed tube in some cases touch one another while as shown in Figs. 2 and 3, the crushed tubes themselves are usually closed at both ends as it is not intended to pass fluid through the core itself.

It will be seen that by forming the core from a tube having a suitable diameter less than that of the tube, g, through which the oil passes, each of the flats, b and 0, can

be formed so that the edges touch the inner walls of the surrounding tube, 9, such contact being made certain preferably by drawing the core through a die or opening of substantially the same dimensions 'as the inner wall of the surrounding tube. When the core, a, thus formed is made of a good heat conducting material, it will be provide an additional cooling surface for the oil, and considerably improve the transmission of heat from the oil to the walls of the tube containing the'core.

Although in all cases the flats, b and c, of

Patented Apr. 15, 1913..

the core lie in planes,-d, d and e, e, passing substantially through the axis, f, f, of the tube, adjacent flats, b and a, need not be 1n two planes at right angles to one another. That is, the planes at d and e, 6, maybe 111'- clined at an angle to one another. F urther, each pair of adjacent flats, b and 'c vmay be inclined at any angle to one another,'-tii1d' to a central plane of the tube, 9 this latter angle varying along the length of the core whereby the coreor retarder thus produced acts even more efiiciently to break up the flow of oil through the tube and thus to improve the heat transmission.

In many cases instead of forming the core from a tube the core may be'cast 1n the required shape or, as shown in transverse section in Figs. 4 and 5, may be formed by sion means according to the present inven-' tion may be used either for cooling or heating the fluid which is passing through a tube and has its direction of flow frequently changed by .the action of the core. The fluid which is outside the said tube and absorbs from or gives up heat to the fluid flowing through the tube, may be gas or liquid inclosed or circulated within a suitable vessel containing the tubes as desired.

I-lcat transmitting means of this type are exceedingly eflicient, and are applicable to coolers, heaters, condensers, and similar ap paratus in which there is a transmission of heat between two fluids, one of these fluids being passed through a tube which contains acore of the above type and is surrounded by the other fluid. Moreover such means constructed according to the present inven-' tion are inexpensive and easily manufac' tured, while obviously many modifications can be made in the details of such means in order to meet the particular requirements.

Having now described our invention what we claim as new and desire to secure by Letters Patent is 1. A device for transmitting heat between two fluids, comprising in combination a tube through which one of the fluids is passed,'a core inserted in said tube, said core having flats which are situated in planes containing the axis of the tube and which contact with the surrounding walls of said tube along lines substantially parallel to the axis thereof.

2. A device for transmitting heat between two fluids, comprising in combination a tube through which one of the fluids is passed, a core inserted in said tube, said core being made by crushing a tube at intervals along its length to form flats which contact with the surrounding tube and are situated in planes containing the axis of the latter, adjacentflats being in ditt'erent planes, whereby the surfaces connecting the flats deflect the fluid on to the walls of the surrounding tube and thereby improve the heat transmission.

3. A device for transmitting heat between two fluids, comprising in combination a tube through which one of the fluids is passed, a core inserted in said tube, said core being made by crushing a tube at intervals along its length to form flats which contain the axis of the surrmmding tube and contact with the latter along lines substantially parallel with the axis thereof, adjacent flats be ing in different planes whereby the surfaces connecting the flats deflect the fluid on to the walls of the surrounding tube and thereby improve the hcat transmission.

t. A. device for transmitting heat between two fluids, comprising in combination a tube through which one of the fluids is passed, a core inserted in said tube, said core being made by crushing a tube at intervals along its length to form flats which contain the axis of the surrounding tube and contact with the latter along lines substantially parallel with the. axis thereof. adjacent, flats being in planes at right angles to one another, and being connected by surfaces which defleet the fluid on to the walls of the surrounding tube and thereby improve the heat transmission.

In testimony whereof, we aflix our signatures in presence of two witnesses.

CHARLES ALGERNON PARSONS. STANLEY SLlll'lll COOK. LOUIS MORTIMER DOUGh/tS.

Witnesses:

FREDERICK. GORDON HAY Pnnrom), ALnnnT W. PAnn.

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