SU1478028A1 - Heat exchanger - Google Patents

Abstract

The invention can be used to cool compressed air with energy recovery. The purpose of the invention is to increase the operational reliability, compactness and processability of the heat exchanger. Horizontal heat exchange elements (E) type pipe in a pipe placed one above the other. Each E is provided at the ends with panels 3, 4 with a stepped bore for pipes 1, 2 and openings in each stage 5.6. The latter are in contact with adjacent E panels with the formation of channels 7.8. The panels are made of a material with a linear expansion coefficient greater than the linear expansion coefficient of the pipe material. Such an embodiment allows to reduce the cost of external heat exchange and provides thermal sealing of pipes in panels. 2 Il.

Description

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The invention relates to heat exchangers and can be used, for example, to cool compressed air with energy recovery. The purpose of the invention is to increase the operational reliability, compactness and manufacturability.

1 shows the proposed heat exchanger; figure 2 is the same, top view.

The heat exchanger contains placed one above the other horizontal heat exchange elements of the pipe-in-pipe type, consisting of pipes 1 and 2. Each element is provided at the ends with panels 3 and 4 with a step bore for pipes 1 and 2 elements and openings in each stage 5 and 6 made in the body of the panels 3 and 4. The panels 3 and 4 are installed in contact with the panels of adjacent elements to form channels 7 and 8 for connecting the elements in series with each other. Panels 3 and 4 are made of a material with a linear expansion coefficient greater than the linear expansion coefficient of the material of pipes 1 and 2.

The heat exchanger operates as follows.

In the case of compressed air cooling, the latter is fed into the annular channel of coaxial tubes b and 2 of the first element, from where it sequentially flows through the annular gaps of other elements. Through pipes 2, the refrigerant is successively passed with countercurrent compressed air and the latter is cooled. The cooled compressed air can then be re-cooled in the expansion chamber, used

for the removal of heat from heat-generating elements (not shown) and directed to the blowing of heat-exchange elements,

what allows to reduce costs of external unproductive heat exchange. Making panels 3 and 4 of a material with a large coefficient of linear expansion (for example, aluminum) than the material of pipes 1 and 2 (copper alloy) provides the thermal sealing of the latter in panels 3 and 4 and the operational reliability of the design.

The heat exchange elements of the proposed heat exchanger improve its compactness and manufacturability, and can also be highly replaceable.

Claims (1)

Invention Formula A heat exchanger containing arranged one above the other horizontal heat exchange elements such as a pipe in a pipe, connected in series with each other by means of channels characterized in that. that, in order to increase operational reliability, compactness and manufacturability, each element is provided at the ends with panels with a stepped bore under the element pipes and holes in each stage in contact with panels of adjacent elements with the formation of channels, and the panels are made of a material with a linear expand large than the linear expansion coefficient of the pipe material. $ .g