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The work is devoted to the study of heat supply systems of isolated facilities of Russian Railways JSC stations, selection of the most energy-efficient and economically feasible method of heat supply. The competitiveness of non-traditional heat systems such as geothermal heating is shown. On the basis of experimental data, economic indicators of operation of existing heat sources are obtained and operating costs for alternative heat supply options are calculated. The configuration of heat sources is determined, which allows increasing technical and economic indicators due to the introduction of renewable energy sources.

The article presents the relevance of the use of sources of low-potential, secondary thermal energy, as well as a method for calculating the dependence of the propylene glycol temperature on the depth of a single-well coaxial collector, with constant values of the parameters of the geothermal well. The proposed methodology of the geothermal reservoir, allows to determine the optimal depth of the well, in which the increase in the temperature of propylene glycol in practical terms does not change, respectively, further drilling becomes economically inefficient.