RESEARCH OF HEAT TRANSFER PARAMETERS IN ARTIFICIAL GROUND FREEZING WITH USING SOLID CARBON DIOXIDE
This article discusses the heat transfer between the solid and liquid carbon dioxide during their interaction. This process occurs at creating refrigerant mixtures by carbon dioxide. Its main parameter is the heat flow from the liquid to the solid carbon dioxide, which in turn determines the rate of sublimation of the solid carbon dioxide. For estimating this parameter is formed methodology laboratory research which were 36 by laboratory experiments. Heat exchange examined with several liquids: aqueous calcium chloride solution (various concentrations), propylene glycol and its aqueous solution, methylene chloride. According to the results of the approximation of the data were derived linear dependence, which satisfactorily describe the process of heat transfer. Presented dependence allow us to give recommendations for the design of artificial freezing of soils using refrigerant mixtures based on solid carbon dioxide. This paper presents the design according to the definition of the heat exchanger, the amount of carbon dioxide and the frequency of loading it into the machine.