RU22816U1 - HEAT PIPE - Google Patents

Description

Heat pipe

The utility model relates to heat engineering and can be used for heating and thermal stabilization of soils in construction, agriculture and other fields.

It is known that a heat pipe containing a sealed working chamber formed by coaxially mounted pipes (A.S. USSR No. 443649 A 01 g 9/24). The disadvantage of this device is that it is ineffective when using low-temperature coolants, such as the sub-permafrost zone of the soil as a heat source. At low values of the temperature gradient, it is extremely difficult to choose a liquid coolant that evaporates at a temperature of the permafrost zone of the soil equal to 4-8 ° C. Thermal fluctuations that occur in the area of the liquid coolant are damped between the screw surfaces.

The closest in its technical essence is a heat pipe containing a sealed working chamber formed by coaxially installed pipes (VI Makarov, Thermosiphons in northern construction. Novosibirsk, “Science. Siberian Branch. 1985, p. 29, fig. 25. g.).

The disadvantage of this technical solution is that the thermal fluctuations arising near the pipe wall (pulse-volume expansion) of the working fluid cause a mixture of upward and downward flows.

The objective of this utility model is to increase the efficiency of the heat pipe by orienting the direction of action of thermal fluctuations of the working fluid.

The present problem is solved in that in a heat pipe containing a sealed working chamber formed by coaxially mounted pipes,

- 1 i 5 b 7

F 28 D 15/00

the working chamber is divided by radial partitions, forming sections connected to each other in the upper and lower parts of the heat pipe, some of which are equipped with v-shaped guides installed with the top down and the other part with v-shaped guides installed with the top up.

The novelty of this technical solution lies in the fact that to increase the thermal efficiency of the heat pipe, its working chamber is divided by radial partitions, forming several sections. In the sections formed by the partitions, v-shaped guides are installed, and in part of the sections, v-shaped guides are installed with the top down, and in the section part with the top up.

In FIG. 1 shows a diagram of a heat pipe.

In FIG. 2 section along AA.

In FIG. Figure 3 shows the direction of action of the fluctuation when lowering the liquid.

In FIG. Figure 4 shows the direction of action of fluctuations during the rise of a liquid.

The device consists of two coaxially installed pipes, an outer pipe 1 and an inner 2, forming a sealed working chamber 3 and a central channel for exhausting the gas stream 4. The sealed working chamber 3 is filled with a working fluid (liquid coolant) and provided with radial

with partitions 5 dividing it into parts 6 and 7. In parts 6 and 7, V-shaped guides 8 are installed, which in parts 6 are installed with the top down, and in parts 7 with the top up. Parts 6 and 7 are interconnected in the upper and lower parts of the heat pipe by cavities 9 and 10.

The operation of the heat pipe in frozen soils is as follows. When the working fluid is heated in the permafrost zone in the regions of the upward flow and in the areas of the downward flow 7, thermal fluctuations occur due to an increase in the velocities of the molecules and a decrease in the density of the liquid. In this case, a pulsed increase in the volume in the working fluid between the guides 8 installed with the top down causes a free transition of the fluid up. The downward movement of the fluid is limited by the damping of pulsations between the sides of the v-shaped guides. The compression of the liquid in the cooling zone increases the intensity of its upward movement in the region of the upward flow 6 and contributes to its flow in the upper part of the thermosiphon to the region of the downward flow 7. In the region of the downward flow when lowering the working fluid down into the permafrost zone, thermal fluctuations also begin to appear, however, guiding 8, located with the top up, quench the pressure of pulses directed upwards and facilitate the outflow of the working fluid down.

In the lower part of the thermosiphon, the working fluid flows from the area of the downward flow in the region of the upward flow through the cavity 10, and in the upper along the cavity 9.

The authors

V L.A. Khvoinsky S.V. Tolstenev V.E. Goryaev K.V. Goryaev

Utility Model Formula

A heat pipe containing a sealed working chamber formed by coaxially mounted pipes, characterized in that the working chamber is divided by radial partitions, forming sections interconnected in the upper and lower parts of the heat pipe, part of which is equipped with v-shaped guides installed with the top pointing downward, and the other part is v-shaped guides installed with the top up.

Authors L.A. Khvoinsky

S.V. Tolstenev V.E. Goryaev K.V. Goryaev

Claims (1)

A heat pipe containing a sealed working chamber formed by coaxially mounted pipes, characterized in that the working chamber is divided by radial partitions, forming sections connected to each other in the upper and lower parts of the heat pipe, some of which are equipped with V-shaped guides installed with the top pointing downward, and the other part - V-shaped guides installed with the top up.