US1590247A - Heat exchanger - Google Patents

Description

June 29 J; LE VALLEY HEAT EXCHANGER Filed Dec. 1 1925 2 Sheets-Sheet 1 m m V w.

June 29 1926. 1,590,247

J. LIE VALLEY HEAT EXCHANGER.

Filed Dec. 1, 1925 2 Sheets-Sheet 2 IN VEN TOR (gal el lle BY Z Elsi? RNEX Patented June 29, 1926.

iii il'lh. STATS Arsa'rcrric JOHN LE VALLEY, OF PAINTED POSQ NEW YORK, ASSIG'NOB TO INGERSOLL RAND COMPANY, OF JERSEY CITY, NEW JERSEY, A CORPGRATION OF NEW JERSEY.-

HEAT nxonanenn.

Application filed December This invention relates to heat exchange apparatus and more particularly to devices for cooling air betweenstages of compression. Although features of the invention are adapted for use in general applications,

the invention possesses special advantages when embodied in auxiliary air coolingapparatus in combination, with other coolers.

It is an object of this invention to provide a cooler in which the air passage is entirely surrounded by a water passage, and to provide baflles which are themselves water cooled for the purpose of repeatedly directing the air against water cooled surfaces.

In former coolers the outer shell is not water cooled nor are the battles. Where such a cooler is placed in a warm engine room, as is frequently the case, it often occurs that the inter-stage air after being cooled somewhat below the temperature of the engine room, will absorb as much heat through the unjacketed shell as the water cooled surfaces inside can extract, so that further reduction of the inter-stage air temperature is impossible. However, in the new cooler herein described, the low temperature of the air which may be obtained is limited only by the temperature of the available water.

Qther objects and advantages of the in vention will be in part obvious and in part pointed out hereinafter.

In the drawings in which similar reference characters refer to similar parts,

Figure 1 is a vertical section through a compressor, its inter-cooler and auxi iary cooler constructed in accordance with the practice of the invention,

Figure 2 is a cross-section through an auxiliary cooler taken along the line 22 looking in the direction of the arrows, and

Figure 3 is a horizontal section through the auxiliary cooler taken along the line 8-3 looking in the direction of the arrows.

Referring to the drawing, a compressor A shown in cross section having a piston B is provided with an inlet chamber C and a discharge chamber D separated by suitable webs E. The compressor cylinder A in this case is the second stage cylinder of a two stage compressing apparatus, the first or low pressure cylinder not being shown. The first stage cylinder is adapted to discharge air into a suitable inter-cooler F which may be of the tubular type in which the tubes G for conducting cooling water are sealed in a tube 1, 1925. Serial No. 72,538.

sheet H at either end of the outer shell J.

For economy of space the inter-cooler F is mounted overhead, being supported by a flanged pipe K bolted to a boss L of the cyl-L inder A. v

In order to effect the desired cooling, an auxiliary cooler. is provided which is adapted to be attached to a boss 0 at the discharge end of the inter-cooler F. The auxiliary cooler comprises an outer shell Pprovided with an air passage Q preferably cast integrally with the outer shell P. The air passage Q is annular in cross section (Figure 1) and leads from an open chamber R at the upper end of the casing or shell P to a chamber S at the bottom of said casing.

The open ended chamber R is provided With a flange T by which the cooler F is attached to the auxiliary cooler. At the lower end of the auxiliary cooler at the chamber S there is likewise provided a flange WV for connection with the cylinder A at the inlet pocket 0 at a boss Y. The air passing from the cooler F enters the auxiliary cooler at the upper inlet chamber R and passing through the passage Q, to the discharge chamber S leaves the auxiliary cooler at the flanged portion W to be further compressed in the cylinder B.

The space about the passage Q, is arranged to be filled with cooling water which is adapted to be supplied from a pipe I) at the lower end of the shell P and conducted through a tubular extension 0 of the walls of the passage Q. The water, after passing through the length of the auxiliary cooler in the space within the shell P surrounding the passage Q, is adapted to be discharged from the auxiliary cooler into a piped threaded into a tapped hole'in the top of the outer shell P. The auxiliary cooler is of the counter flow type and is preferably supplied with the coolest water available for cooling the air passing therethrough.

The water may be reused by connecting the pipe cl with the supply pipe of the intercooler F.

The air passing through the chamber Q, is additionally cooled by a central member 7 made hollow to conduct water which insures contact of the air with a cooling surface. Furthermore a serpentine path for the air is secured by the provision of water cooled alternately located hollow baflies g.

It will be noted that every wall or baffle with which the air contacts is adapted to absorb heat from the air, to assist its cooling.

To facilitate the making of the auxiliary cooler and also to make cleansing of'the water passages withinthe shell P possible, suitable hand holes 0 are provided at convenient intervals on the outside of the shell P and are normally closed bycovers p bolted in place. v

I claim: I

1. An auxiliary cooler, comprising three spaced concentric conduits, hollow semi-circular staggered baiile plates extending from the inner conduit to the outer conduit and allowing communication between said outer and inner conduits, inlet and outlet means positioned to allow the circulation of the cooling fluid through the outer and inner conduits, and an air inlet and outlet to the intermediate conduit.

2. An auxiliary cooler, comprising three spaced-concentric cylindrical walls forming conduits, semi-annular baffles being formed of two spaced members positioned in staggered' relationship to each other between the specification.

JOHN LE VALLEY.

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