SU1232923A1 - Heat-exchanging element of plate heat exchanger - Google Patents

Description

The invention relates to heat exchange elements of plate heat exchangers and can be used in chemical and energy engineering.

The purpose of the invention is the intensification of heat transfer and the reduction of hydraulic resistance,

The drawing shows the proposed heat exchange element.

The element contains flat plates 1 and a zigzag partition wall 2, interposed between them, with alternating straight sections 3 of different lengths. the diffuser-confused channels for the working medium with plates 1, C parts 3 of the partition 2 in the diffuser channels are equipped with turbulizing: they are extrusions 4 and have a length of 0 (, 15-0.3 widths of the inlet section of these channels) : differential 40-60. The element is sealed: restrictive bars 5 and is equipped with manifolds 6-8 with connections 9 and 10 for supplying and discharging the working medium.

Editor N.Egorova

Compiled by Yu / Karpenko Tehred M. Khodan1ych

Order 2756/39 Circulation 589 Subscription

VNIIP; USSR State Committee

for inventions and discoveries 113035, Moscow, Raushsk nab. d "4/5

Production and printing company, Uzhgorod, Projecto st., 4

329232

The element works as follows.

The working medium coming from the pipe 9 to the collector 6 of the element passes through a row of diffuser-confused channels located on one side of the partition 2, and enters the collector / 5 where it turns 180. Further, the passage through a similar- and a number of diffuser-confused channels, located on the other side of the partition 2, enters the collector 8 and goes through the pipe 10 out of the element. At the same time, due to the increase in the diffuser channels of the dispensers 4 and the implementation of the sections 3 of the partition 2 in the diffuser channels with a length of 0.15-0.3 widths of the inlet section of these channels at 20 opening angles of diffusers 40-60,

In the grades 4, the formation of near-wall microvortices takes place during an almost uninterrupted flow of the working medium, which reduces the hydraulic resistance: 25 and the heat exchange is intensified.

Proofreader V.Sinitska

Claims (2)

1. HEAT EXCHANGE ELEMENT OF A PLATED HEAT EXCHANGER containing flat plates and a zigzag separating partition placed between them with alternating straight sections of different lengths, forming diffuser-confuser channels for the working medium with the plates, characterized in that, in order to intensify heat transfer and reduce the hydraulic resistance diffuser channels are provided with turbulent extrusions. 2. The element according to claim 1, characterized in that the sections of the baffle in the diffuser channels have a length of 0.15-0.3 of the width of the input section of these channels at the opening angles of the diffusers 40-60 '. 1232923 A1