STUDY OF THE PARAMETERS OF HEAT EXCHANGE OF THE STEAM PHASE OF PROPANE-BUTANE MIXTURE WITH SOIL IN AN UNDERGROUND GAS HOLDER DURING NATURAL REGASIFICATION OF LIQUEIFIED HYDROCARBON GAS IN AUTONOMOUS GAS SUPPLY SYSTEMS

Statement of the problem. Gas supply of individual residential buildings with consumption of gas fuel of up to 3 kg / h in most cases is organized on the basis of individual gas holders with underground installation in the ground and natural regasification of the liquefied hydrocarbon gas. A significant disadvantage of systems with natural regasification is that when reducing wet steam mixture of propane-butane in pressure regulators, ice and hydrate plugs are formed, which disrupts the gas supply of an object. In order to develop recommendations for the prevention of specified phenomenon, the authors carried out theoretical studies of the heat exchange of the vapor phase of the propane-butane mixture above the mirror of evaporation in the underground gasholder of liquefied hydrocarbon gas. Results. The mode of flow of the vapor phase of the propane-butane mixture from the mirror of evaporation to the neck of the underground gas holder is established, which makes it possible to correct the values of convective heat transfer and heat transfer coefficients recommended by other authors for an objective evaluation of processes heat exchange in the underground gasholder of liquefied hydrocarbon gas. Conclusions. The results of the conducted studies showed that the process of reduction of the vapor phase can be carried out without the formation of hydrates and ice plugs in pressure regulators on the condition of the conservation of the temperature of the vapor phase of the mixture of propane-butane from the neck of the gasholder to the node of reducing.