METHOD AND DEVICE FOR YEAR-ROUND COOLING, FREEZING OF GROUND AT FOUNDATION BASE AND FOR HEAT SUPPLY OF STRUCTURE ON PERMAFROST GROUND IN CRYOLYTIC ZONE Russian patent published in 2014 - IPC E02D3/115 

FIELD: heating.

SUBSTANCE: invention relates to devices for controlled temperature stabilisation, cooling and freezing of ground at foundation bases as well as for heat supply of structures on permafrost grounds (in cryolytic zone). Method of year-round cooling, freezing of ground at a foundation base and for heat supply of a structure on permafrost ground in cryolytic zone involves drilling of wells, cooling of ground. All year round, cooling and freezing of the ground of a foundation base are controlled and the year-round partial heat supply of the structure is carried out due to the heat of the foundation base ground and adjacent ground layers that are cooled and frozen. The primary circuit of a heat pump with low temperature heat carrier is formed, the boiling temperature of the heat pump working medium is by 10-30°C lower than the minimal temperature of the heat carrier in the primary circuit. The heat pump is installed inside a structure and heat is supplied with the conversion factor above 1-3. The freezing temperature of the heat carrier in the primary circuit of the heat pump is lower than the minimal temperature of the ambient air of the structure's site up to -60°C. The evaporation temperature of the working medium in the secondary circuit is higher than the lower limit of its working range of temperatures up to -75°C. A thermal well is set in the block of a structure base with bearing piles on the periphery or thermal wells being divided into less powerful ones are set at its periphery along with providing for additional bearing function of a pile. The heat carrier of the divided thermal wells is delivered by heat insulated heating conduits to a common heat exchanger of the heat pump primary circuit or to several heat pumps installed in different rooms of the structure.

EFFECT: guaranteed year-round provision for frozen state of structure foundation base along the whole well depth as well as provision for year-round backing up of part (approximately the half) of structure's thermal load by means of a heat pump due to the usage of heat from the permafrost ground being cooled and frozen.

5 cl, 1 dwg, 3 tbl