SU800572A1 - Thermosiphon - Google Patents

Description

(54) THERMOSIFON

I

The invention relates to heat engineering and can be used to create heat exchange equipment, mainly in industrial energy.

A thermosyphon is known that contains a hermetic body partially filled with coolant with evaporation and condensation zones, a central insert with a flange at the upper end adjacent to the wall of the case, fitted with tangential nozzles for removal of steam located in its upper part JL located in the evaporation zone.

The disadvantage of this design is that the total flow area of the nozzles in the flanging is limited by the size of the flanging, so the nozzles have great hydrodynamic resistance, which leads to a decrease in the rate of circulation of the coolant, the heat transfer characteristics of the thermosyphon as a whole and its reliability.

The purpose of the invention is to increase the heat transfer ability of thermosyphon

while increasing the reliability of the work ego.

This goal is achieved by the fact that the nozzles are located below the drawback, and in the lower part of the condensation zone, a bump stop is installed in the form of a conical ring on the wall of the housing.

Thermosyphon Can be provided with a shell placed on the outer lobe; the surfaces of the insert in the area of rectangular nozzles are formed by stamping on the insert to the shell.

In addition, the axis of the nozzles are directed upwards at an angle not exceeding the PSA relative to the plane perpendicular to the axis of the housing.

FIG. I depicts a thermosyphon, longitudinal section; in fig. 2 g - thermosyphon in the zone of nozzles, cross section.

The thermosyphon contains a sealed case I, partially filled with coolant, with evaporation and condensation zones 2.3, respectively, placed in the evaporation zone 2 central insert 4

with a drawback 5 at the upper end, tightly adjacent to the wall of housing I, equipped with tangential nozzles 6 for draining steam located in its converging part. The nozzles 6 are placed below the flange 5 of the insert 4, and in the lower part of the condensation zone 3 on the wall of the housing I there is a bump in the form of a Cone-ring 7. A thermosyphon is equipped with a shell 8 placed on the outer surface of the insert 4 in the area of the nozzles 6, rectangular section formed by the stamps on the insert 4 and on the shell 8. The axes of the nozzle 6 are directed upwards at an angle бBO relative to the plane perpendicular to the axis of the housing 1. In the lower part of the insert 4 there are holes 9 for the passage of coolant condensate.

Thermosiphon works as follows.

The vapor-liquid mixture of heat transfer fluid formed in the annular gap between the housing 1 and the insert 4 when heat is applied to the thermos evaporation zone 2 (|) it rises up through the annular gap and passes through the tangential nozzles 6, while the mixture twists in the area between the insert 4 and with a tapered ring 7, the liquid phase, as heavier as it is, is thrown by the action of centrifugal forces to the surface of the housing I, flows down into the insert through it, and again enters the evaporation zone 2. The bump stops the spreading of swirling flow upwards to the condensation zone 3

The steam flow passes through the conical ring 7 into the condensation zone 3 and condenses there, after which the condensate flows down into the insert 4 and then enters the evaporation zone 2.

Since the axes of the nozzles 6 are directed upwards, the positive (upward) direction of the axial component of the swirling steam flow leaving the nozzles 6 is provided. The amount of liquid in the condensation zone is significantly reduced due to its separation, the thickness

the condensate films on the wall also decrease and thereby reduce the thermal resistance of the films, the condensation process is intensified, and the heat transfer characteristics of the thermosyphon increase.

In addition, the multiplicity of circulation of the heat transfer fluid increases due to a decrease in the height of the circulation loop of the liquid phase and a decrease in the resistance of the nozzles for the passage of steam, which increases the reliability of the operation of the thermosyphon at high densities of heat fluxes.

AND

Formula of Invention

Claims (3)

1. A thermosyphon containing a hermetically sealed body partially filled with coolant with evaporating zones and 1 sdendensation; that, in order to increase the heat transfer capacity while increasing reliability, the nozzles are placed below the flange of the insert, and in 1shzhnoy part of the condensation zone on the wall of the housing n chipper in the form of a conical ring. 2. A thermosys according to claim 1, which is also characterized by the fact that it is equipped with a shell, placed on the outer surface of the insert B in the area of rectangular nozzles and formed by the stamps on the insert and on the shell. 3. The thermosyphon of claim 2, that is, with the fact that the axis of the nozzles are directed upwards at an angle not exceeding 60, relative to the plane perpendicular to the axis of the housing. Sources of information taken into account in the examination I. USSR author's certificate No. 27О1526, cl. Р28В 15 / ОО, 1978. Riga.1