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The article is devoted to one of the urgent problems in the activities of JSC “RZD“- increasing the energy efficiency indicators of locomotives, namely, new generation locomotives running on liquefied natural gas (LNG) - GT1h series gas turbine locomotives. The results are presented for the analysis of typical diagrams of traction work at hauling trains by the gas turbine locomotive on the Surgut - Voinovka section of the Sverdlovsk Railway. Measures are proposed to reduce the specific consumption of the fuel used for hauling operations for various running duties of a gas turbine locomotive (traction mode, idling, transient modes). The justification and description are given for the selected technical solutions to reduce fuel consumption by the “gas turbine engine-traction generator” system during gas turbine locomotive operation in idle and traction modes. The results of tests of the gas turbine locomotive during idling and in traction mode using the proposed technical solutions are presented. The comparative analysis of the results obtained is carried out and the economic assessment of the effectiveness of the selected measures is given when the gas turbine locomotive is operating in idle and traction modes. A mathematical model is proposed for the electric traction drive and the automatic control system of the gas turbine locomotive, developed using the Matlab Simulink environment and designed to study the operation and optimization of electromagnetic processes occurring in the electric traction drive of the gas turbine locomotive in various modes of its operation. Based on the results of modeling the algorithms for the operation of the automatic control system (CAP) allowing to provide energy-optimal loading paths for the “gas turbine engine - traction generator” system in the entire power control range, the economic assessment of the effectiveness of the CAP algorithms is given. The economic assessment is presented for the implementation of a set of proposed measures to improve the energy efficiency of gas turbine locomotives.

In the modern operating conditions of railway refrigerated transport, the primary tasks have become increasing the energy efficiency of rolling stock and reducing operating costs. This article presents an analysis of the energy and economic efficiency of replacing the power equipment of an autonomous refrigerated car to transition from diesel fuel to liquefied natural gas. To perform the analysis, the authors developed an engineering model of the energy balance for the autonomous refrigerated car equipment, supplemented by a cold recovery loop from liquefied natural gas regasification. The research methodology is based on a systems approach that considers the thermodynamic properties of the proposed replacement fuel and the specifics of heat exchange processes in the cargo compartment. Based on the obtained model, a comparative analysis was performed between the calculated indicators of the considered power equipment designed for liquefied natural gas and the operational data of existing diesel analogs. During the evaluation of the fuel replacement effect, the technical feasibility of ensuring standard car autonomy indicators when transitioning to liquefied natural gas without deteriorating the rolling stock's operational characteristics was confirmed. It was established that cold recovery from liquefied natural gas regasification significantly improves the equipment's energy performance, ensuring a sufficient level of energy autonomy and reduced fuel consumption through the beneficial use of the gas's physical exergy. The developed model allows for a comprehensive assessment of the systemic effect of replacing diesel fuel with liquefied natural gas, taking into account various temperature regimes of the car body. The conclusions demonstrate that converting refrigerated rolling stock from diesel fuel to liquefied natural gas for use as both energy fuel and refrigerant (cogeneration) is expedient.