SU1437674A1 - Attachment of surface-contact heat exchanger - Google Patents

Abstract

The invention can be used in irrigation devices equipped with a nozzle. The purpose of the invention is the intensification of heat transfer. The nozzle contains horizontal rows of plates 1 and 2 tilted in opposite directions. In each row of the plate 1, one tilt is installed with the formation of upper and lower gaps 3 and 4 and alternating through one relative to the plate 2 of the opposite tilt. Plates 1 are made with a greater height than plates 2 and are located with their upper edges above the upper sections of plates 2, which have a smaller height. The degree of turbulence in the streams increases, since the plates 2 serve as additional flow turbulizers, increasing the heat exchange rate between the vapor-air mixture and water. 2 Il. (P

Description

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The invention relates to heat transfer engineering and can be used in heat exchangers, irrigation devices equipped with a contact-type nozzle.

The purpose of the invention is to intensify heat exchange by increasing the degree of turbulence in the flows.

FIG. 1 shows the nozzle of the contact heat exchanger, general view; in fig. 2 - layer nozzle contact heat exchanger, cross section.

The nozzle of the contact heat exchanger contains horizontal rows of plates I and 2 tilted in opposite directions, with each row of plate 1 having one tilt with the formation of upper and lower gaps 3 and 4 and alternating through one with respect to the plates 2 of opposite tilt. The plates 1 of the same inclination are made with a greater height than the plates 2 of the opposite inclination and are located with their upper edges over the upper sections of the plates 2 having a smaller height. Plates 1 and 2 are fastened together with ribs 5 stiffness.

Nozzle contact heat exchanger works as follows.

The vapor-air mixture passes downward in the gaps 3 and 4 between plates I and 2. The heated water is sprayed from above towards the vapor-air mixture. The sprayed water, falling on the plates I and 2 of the nozzles, forms on the nick the water film, on the surface of which there is

There is a process of heat and mass transfer between air and water. At low rates of vapor-air mixture and water, the heat exchange process occurs under the conditions of a laminar boundary layer of water on the surfaces of plates 1 and 2, at which this process is not carried out sufficiently intensively.

Plates 2 nozzles, in addition to being the surface of the usual

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heat transfer, promote a faster transition of the laminar boundary layer to the turbulent one, i.e. they serve as additional flow turbulators. This makes it possible to increase the Reynolds criterion and, accordingly, the heat transfer coefficient between the vapor-air mixture and water.

Formula inventions

A nozzle of a contact heat exchanger containing horizontal rows of plates tilted to opposite sides, each plate having one inclination are installed with the formation of upper and lower gaps and alternating through one with respect to the plates of opposite inclination, characterized in that of the degree of turbulence of the flows, the plates of one inclination are made with a greater height than the plates of the opposite inclination and are located with their upper edges above the upper ezami plates having a lesser height.

Claims (1)

Claim A contact heat exchanger nozzle containing horizontal rows of plates inclined in opposite directions, and in each row, plates of the same inclination are installed with the formation of upper and lower gaps and alternating through one relative to the plates of the opposite inclination, characterized in that, in order to intensify heat transfer by increasing the degree of turbulization flows, the plates of one slope are made with a higher height than the plates of the opposite slope and are located with their upper edges above the upper cut Ami plates having a lower height.