Authors of the article Aleksandrov V. D. , Lukyanov A. In. Postnikov V. A. , Ostapenko V. In. , Gritsuk I. In. , Prilepsky Yu. In. Published in . Collection of scientific papers DonIZT, 2011, No27, C. 126-132. To create an optimal microclimate in the cabs of drivers during heating of the locomotive, the use of phase transition thermal batteries is proposed. To this end, an experimental plant with a phase-transition heat accumulator has been developed, designed to study the behavior of heat storage material (TAM) in conditions close to real, as well as to find out the optimal operating conditions. The paper presents the data of the study by thermal methods of analysis of parameters of melting and crystallization of paraffin technical.