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The seasonally-operating cooling devices (SHOW) designed to maintain the soil in a frozen state, which ensures the stability of buildings, pile structure, and also stores the frozen ground around the supports of transmission lines and pipelines, along the embankments of railways and highways. The basis of the seasonally active cooling devices technology is the heat transfer device (thermosyphon), which in winter extracts heat from the ground and transfers it to the environment. An important feature of this technology is that, she naturally-acting, ie. It does not need an external power source.


The principle of operation of all types of seasonally active cooling devices same. Each of them consists of a sealed tube, in which there is a coolant - coolant: carbon dioxide, ammonia, etc.. The tube consists of two sections. One section is located in the ground and called evaporator. second, pipe radiator section, located on the surface. When the ambient temperature drops below the temperature of the Earth, where lies the evaporator, Refrigerant vapors begin to condense in the radiator section. As a result of reduced pressure and the refrigerant in the evaporator part starts to boil and evaporate. This process is accompanied by the transfer of heat from the evaporator part in the radiator.


Технология работы термостабилизатора

Heat transfer with thermosiphon


Currently, there are several types of designs seasonally active cooling devices:


1) heat stabilizer. Is a vertical pipe thermosiphon, around which the frozen ground.

2) thermally. It is a vertical pile with integrated thermosyphon. Thermally can carry some load, eg pipeline support.

3) Deep seasonally active cooling device. It is a long (to 100 m) tube thermosiphon enlarged diameter. Such cooling devices are used for temperature stabilization of the soil at a great depth, eg for thermal stabilization dams.

4) Slope seasonally active cooling device. This type of cooling device is different from a thermal stabilizer in order, that the installation of the evaporator tube is performed under a bias about 5%. In this case, it is possible to install an inclined evaporator tube directly under buildings, erected on concrete slabs.

5) Horizontal cooling device. Especially horizontal seasonally existing cooling device is, it is completely installed horizontally at the level of the prepared bulk base. In this case, the building is being built directly on unsettled ground, located on the insulation layer and the evaporator tubes. An advantage of horizontal cooling devices is that they can be used in two configurations: on MDF and pile foundations.

6) The system of vertical cooling devices. This type of seasonal active cooling devices is similar to the horizontal cooling device, but in contrast to it, in addition to the horizontal evaporator tubes, can contain up to several tens of vertical evaporator tubes. The advantage of this system is more effectively maintained in a frozen state of the soil. The disadvantage of vertical systems of cooling devices is the difficulty of their repair and maintenance.


Термостабилизатор грунта


Глубинное охлаждающее устройство

heat stabilizer


Deep seasonally active

cooling device


Наклонное сезонно-действующее охлаждающее устройство

Система ГЕТ

Система ВЕТ

Slope seasonally active cooling device

Horizontal cooling device

The system of vertical cooling devices