SU1298504A1 - Heat exchanger - Google Patents

Abstract

The invention relates to heat exchange technology and can be used in the energy industry. The purpose of the invention is to intensify heat transfer. Each pipe 3 is twisted along an elongated cycloid in the direction coinciding with the direction of the spiral winding. The spirals are in contact with the core 2, and the shell 1 is made with increasing diameter in the course of the annular medium movement. This embodiment ensures uniform distribution and mixing of the flow in the annular space | Stve. 3 hp f-ly, 4 ill. 1

Description

The invention relates to heat exchange apparatus and can be used in the energy industry.

The aim of the invention is to intensify heat transfer.

FIG. 1 schematically shows the proposed heat exchanger; in Fig. 2 - the same cross section; in fig. 3- the same, with sparse winding spirals; in fig. 4 is the same, with increasing shell diameter.

The heat exchanger contains a cylindrical shell 1 for annular

determines the smallest distance between the pipe axes 3 t,. When the distance between the axes of the pipes 3 is greater than the height of the pipe helix h

5 violation of a given form of elongated cycchoid.

The pitch between adjacent tube coils in winding t must be greater than or equal to the thickness of the tube coil.

 About h and less than the height of the winding h minus

tube helix thickness hg. Yeri we have a case of contact of pipe spirals, dense winding. When the helix pitch is larger (h –h), the pipe spunred, coaxially installed in the obcheral, will occupy only a part between the core 1 core 2 and wound on the core-tube space, which leads to the nickname of the spiral of the pipes 3, each of which is twisted along an elongated cycloid in the direction coinciding with the direction of spiral winding. Spiral tubes 3 can be installed in contact with the core 2 by the cycloid side, which has a smaller twist radius, and one helix can be installed in contact with the core 2 by the cycloid side, which has a smaller twist radius, and adjacent - by the side that has a larger radius of 20

25

to uneven distribution of the flow and to reduce the intensity of heat transfer.

The heat exchanger operates as follows.

The direct flow of the gaseous coolant enters the heat exchanger and is distributed in spirals of pipes 3, in which it is cooled by a cold working medium entering the annular space.

twists. The shell 1 can be made with increasing diameter in the course of the annular medium (Fig. 3).

The ratio of the height of the spiral h to the outer diameter of the pipe 3 d should

Claims (3)

1. A heat exchanger containing a cylindrical shell for the annular medium, coaxially installed in the shell be greater than 5 and less than 50. With the ratio of the core and the height of the spiral h wound on the core h to the outer diameter of the pipe 3 d less than or equal to 5 in the material of the pipe 3 occur during the manufacture of voltage spirals. spirals of pipes, distinguished by the fact that, in order to intensify heat exchange, each pipe is twisted along an elongated cycloid in a direction exceeding the tensile strength of the material, which coincides with the direction of the pipe, which leads to deformation of the pipe 3, cracking and violation of tightness. With an h / d ratio greater than 50, the pipe helix loses rigidity, the specified helix shape and winding stability are not impaired. In addition, the cycloid step t „wives will be smaller. With step cyclo IDE t is larger — pipes 3 are deformed on the side having a smaller twist radius. The distance between the axes of the pipes 3 t in the adjacent turns of the pipe helix (Fig. 3) must be greater than the diameter of the pipe 3 d.r and less than the height of the spiral h. At t, dy the turns are in contact. it determines the smallest distance between the pipe axes 3 t,. When the distance between the axes of the pipes 3 is greater than the height of the pipe helix h violation of a given form of elongated cycchoid. The pitch between adjacent tube coils in winding t must be greater than or equal to the thickness of the tube coil. h and less than the height of the winding h minus The rails will occupy only a part of the intertube space, which leads to uneven distribution of the flow and to reduce the intensity of heat transfer. The heat exchanger operates as follows. The direct flow of the gaseous coolant enters the heat exchanger and is distributed in spirals of pipes 3, in which it is cooled by a cold working medium entering the annular space. Invention Formula 1. A heat exchanger containing a cyindric shell for the annular medium, a core coaxially mounted in the shell and wound on the core spirals of pipes, characterized in that, in order to intensify heat exchange, each pipe is twisted along an elongated cycloid in the direction of spirals. 2. A heat exchanger according to claim 1, which is characterized by the fact that the spirals are installed in contact with the heart by the side of the cycloid having a smaller twist radius. 3. A heat exchanger according to claim 1, in which one helix is mounted in contact with the servo with a cycloid side having a smaller twist radius, and adjacent with a side having a larger twist radius. A. A heat exchanger according to claim 1, wherein the shell is made with an increasing diameter in the course of the annular medium movement. FIG. 2 FIG 3 Editor S. Patrushev Compiled by V. Kosenko Tehred M. Hodankch Proofreader L. Pilipenko Order 874/39 Circulation 612 VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhhorod, st. Project, 4 FIG. Subscription