SU906395A3 - Heat exchanger - Google Patents

Abstract

1437460 Heat exchangers; heat pipes AGA AB and S KNOOS 31 May 1973 [2 June 1972 5 Feb 1973] 25979/73 Headings F4S and F4U In a heat exchanger comprising a pair of elements 12 and 13 separated from each other by a diaphragm 15 and mounted within a housing 11 with each element comprising a plurality of coextensive flow channels 23a formed for example by a spiral winding 25a wound around a central core 27a, fluid entering element 12 through an inlet 28a is distributed to the channels 23a via a plurality of equi-angularly spaced radially extending channels 41a-43a in a plate member 45a, the fluid after passing along a portion of the total length of the channels 23a being collected in radially extending channels 48a-50a to be discharged to an outlet (33a, Fig. 1). As shown heat is exchanged across the diaphragm 15 between a first fluid flowing through element 12 and a second fluid flowing through element 13. However in an alternative embodiment (Fig. 26, not shown) the second element 13 is omitted and the diaphragm 15 is connected to or comprises part of a heat source or sink (180). The elements 12 and 13 are held in tight engagement with the diaphragm by means of bolts 17, and adjacent spiral windings are spaced apart by a wire 30a. Alternatively the heat exchange elements may be urged into contact with the diaphragm by means of cover plate assemblies (181, Fig. 22, not shown) each filled with a fluid such as oil or mercury, said fluid being pressurized by a pressure amplifying piston assembly (200) utilizing a portion of the incoming heat exchange fluid as a working fluid. In another embodiment (Fig. 24, not shown) the piston pressure is manually adjustable. The spiral winding may be formed as a heat pipe construction (see Fig. 20, not shown) the winding comprising two strips separated by a spacer (142) to define a channel the inner walls (140, 140a) of which are covered with a capillary wick of sintered metal. In an alternative embodiment (Figs. 7 and 8, not shown) fluid is distributed to and collected from the channels by a pair of slots or grooves (60) milled in the top portions of the channel walls, the slots or grooves tapering towards the centre of the heat exchanger. In a further embodiment (Figs. 12 and 13) intake fluid is distributed by means of channels in the form of distribution meshes (87) placed over the top edges of the spiral windings; the collector channels are in the form of grooves (90) milled in the windings. A number of pairs of elements separated by diaphragms may be stacked one above another within a cylindrical housing (Figs. 16 and 17) having inlet and outlet channels (28 and 33) formed in the walls thereof.

Description

one

FIELD: heat engineering.

A heat exchanger is known, which comprises a cylindrical body in which spiral bands are arranged in an appropriate manner, 5 forming channels for heat-transfer agents and separated by a spacer {J.

However, in this design of the heat exchanger, the possibility of clogging of channels appears, which leads to a very strong restriction of the circulation of the flow of heat exchange medium with a subsequent drop in pressure and, accordingly, the heat exchange decreases.

The purpose of the invention is the intensification of heat transfer 18. This is achieved by the fact that each tape from the opposite end spacer is tightly adjoined to a disk, in the body of which an annular groove and slots connected by it are made, 20 located at different levels along the thickness of the disk and serving for supplying and discharging heat carrier channels, and from the side one of the disks is installed glass.25

The glass can be pressed to the disk with the help of bolts screwed into an annular element connected to the inner wall of the housing with a thread.

The spacer can be made in the form of a membrane made of heat-conducting material.

 The slits can be made tapering from the periphery of the disc to the center.

FIG. I schematically depicts the proposed heat exchanger; 2a, a partial section; FIG. 3 view A in FIG. 2; in fig. 4 - slotted disc and slot.

Claims (4)

The heat exchanger contains a cylindrical body 1, in which spiral bands 2 are arranged in an appropriate manner, forming channels 3 for heat exchangers and separated from each other by a spacer 4 made in the form of a membrane made of a material with high thermal conductivity. Each tape 2 from the opposite spacer of the end face is tightly attached to the disk 5, in the body of which an annular groove 6 and the slots 7 connected by it, located at different levels along the thickness of the disk and serving dp supply and removal of coolants from the channels, are made. A glass 8 is installed on the side of one of the disks. Glass 8 is clamped to disk 5 by means of bolts 9 screwed into an annular element 10 and connected with a thread to the inner wall of housing 1. Spiral ribbons 2 can be made of a material having a high thermal conductivity. ; for example copper, aluminum or steel. The slits 7 are made narrowing from the periphery of the disc to the center. When preparing the heat exchanger, the winding of the tapes 2 can be facilitated by placing the wire 1I. The case I of the heat exchanger is equipped with fittings 12 for supplying heat transfer fluids and fittings 13 for removing heat transfer fluids. Heat transfer fluids through nozzles 12 enter the heat exchanger, are distributed along flux lines and circulate through channels 3. This heat exchanger is highly efficient, simple and HbtM saving in production and can be easily disassembled for replacement, repair and cleaning of its individual parts. Claim 1. Heat exchanger comprising a cylindrical body in which spiral tapes are placed in a row, forming channels for heat carriers and separated by a spacer, characterized in that, in order to intensify heat exchange, to each tape with an opposite end spacer, the disk is tight. The body of which has an annular groove and slots connected by it, located at different levels along the thickness of the disk and used for supplying and discharging the coolant from the channels, and a cup is installed on the side of one of the disks. 2. A heat exchanger according to claim 1, characterized in that the glass is pressed against the disk by means of bolts screwed into an annular element connected by means of a thread with the inner wall of the housing. 3. Heat exchanger according to claim 1, characterized in that the spacer is made in the form of a membrane made from a thermally conductive material. 4. A heat exchanger according to claim 1, characterized in that the slots are made tapered from the periphery of the disk to the center. 11 sources of information taken into account during the examination 1. German patent R 635969, 17 f 4/02, published. 1934.