SU541077A1 - Shell and tube ammonia condenser - Google Patents

Description

one

This invention relates to the field of refrigeration.

Known shell-and-tube ammonia capacitors with a vertical beam of heat exchanger tubes fixed in tube plates 1.

Since the tubes of ammonia capacitors have a length of 4.5 m to 5.5 m and an internal diameter are mm, in known capacitors, the effect of film turbulence on the intensity of heat transfer to cooling water appears only on a small (about 1 m) initial pipe section.

The purpose of the invention is to increase the heat transfer coefficient.

This is achieved by the fact that in the proposed ammonia condenser inside each pipe at a distance from the upper tube plate of 15-20 inner diameters of the tube, a washer is installed with slots along the periphery.

FIG. 1 schematically shows a shell-and-tube condenser; in fig. 2 is a longitudinal section of a portion of the heat exchange pipe; in fig. 3 is a section along A-A in FIG. 2

The condenser comprises a housing 1 within which pipes 3 are fixed in tube plates 2. On one side of the pipe 3 there are inserted caps 4 for distributing a film of liquid.

Inside each pipe at a distance from the tube board 2, 15-20 inside diameters of the pipe, washers 5 with tangential slots 6 were fixed for the film turbulence. Such an arrangement of the swirler helps to maintain a high heat transfer intensity to the cooling water. For pipes 4.5–5.5 m long, it is sufficient to install 3-4 washers. In this case, there is no increase in the hydraulic resistance in the apparatus, since the swirlers are located at a sufficiently large distance from each other. Crepe ts washers wire distribution caps or by any known method.

The liquid for cooling the inner surface of the pipe is fed through the tangential slots in the caps 4 and flows in a twisted state along the pipe wall. Due to the presence of washers 5 with tangential cuts, the film turbulence is maintained until it leaves the tube, which contributes to a high intensity of heat transfer from the wall to the liquid.

Claims (1)

Invention Formula Ammonia shell-and-tube condenser with a vertical bundle of heat exchanger tubes fixed in tube plates, characterized in that, in order to increase the heat transfer coefficient, inside each tube at a distance from the top tube plate of 15-20 inner tube diameters. a washer with perforations along the periphery was installed. 5 Source of information taken into account during the examination: 1. Pokrovsky N. K. Chillers. and installation. M., “Food Industry, 1969, p. 99 Fig FIG. 2