SU566902A1 - Arrangement for accumulating cold and freezing soil - Google Patents

Description

I

The invention relates to construction in the permafrost zone and relates to devices for cold storage and freezing of the ground.

A device for cold storage and freezing of the soil is known, including air and ground heat exchangers filled with an antifreeze liquid, such as kerosene 1.

However, in such a device, the circulation of the non-freezing liquid is small, with the result that the cooling capacity of the device is insignificant.

It is also known to be closest to the invention a device for cold storage and freezing of the soil, including also air and ground heat exchangers. The heat exchangers are interconnected by pipelines and filled with gas-saturated liquid 2.

A disadvantage of the known device is that the gas inactive in the circulation process accumulates in the air heat exchanger, as a result of which the cooling capacity of the device decreases.

The purpose of the invention is to increase the cooling capacity of the device for cold storage and freezing of the soil.

This is achieved by installing filters in an air heat exchanger in the area of the outflow of a gas-saturated liquid. To improve cooling, the filters are equipped with rods of thermally conductive material supported on the bottom of the air heat exchanger. In order to ensure a given position of the filters relative to the liquid-gas bubble interface, the filters have

floats.

FIG. I depicted the proposed device, a longitudinal section; in fig. 2 is the same; the section along A-A in FIG. 1. A device for cold accumulation and freezing of the soil consists of a ground heat exchanger 1, a connecting unit 2 which includes a drain pipe 3 and a central lift pipe 4 for the heat transfer medium entering the air heat exchanger 5,

made with ribs 6. Below the boundary 7 of the liquid-gas bubble interface is a filter 8, which can be made mesh. The filter is connected to vertical heat sink rods 9 supported on

bottom of the air heat exchanger. There are holes 10 on the central tube, between which additional filters 11 are fixed with holes 12 that are offset relative to each other in adjacent filters 11,

form a broken line of the vertical heat carrier ctoKa. Instead of rods 9, heat-removing grids, plates, pipes, etc. can be attached to the filter 8. The filter 8 can be attached to a float (not shown), for example, from foam, to provide a predetermined position of the filter 8 relative to the liquid-liquid interface. - gas bubble. The central pipe can be made without holes and additional filters 11 if the coolant spout goes through the upper cut of pipe 4. In this case, only filter 8 is installed. The role of filters 8 and 11 is to trap gas bubbles during circulation and develop liquid-gas interface. The heat removal rods 9 accelerate the cooling, which results in gas being absorbed by the liquid from the bubbles.

Due to the presence of filters 8 and AND, the amount of active gas increases and the cooling capacity of the device for cold accumulation and freezing of the soil increases significantly.

Claims (3)

1. A device for cold accumulation and freezing of the Soil, including air and ground heat exchangers filled with a gas-saturated liquid, and connecting pipes, characterized in that filters are installed in the air heat exchanger in the area of an outflow of gas-saturated liquid. 2. The device according to claim 1, characterized in that the filters are provided with rods of thermally conductive material supported on bottom of the air heat exchanger. 3. The device according to claim 1, characterized in that the filters are provided with floats. Sources of information taken into account in the examination 1. Gapeev S.I. Strengthening of frozen bases by cooling. L., “Stroyizdat, 1969, p. 18. 2. USSR author's certificate No. 483491, cl. E 02d 3/12, 1971. ipui./ / //;