Abstract
Purpose. The use of anti-friction traction motor support bearings (TMSB) instead of plain friction traction motor support bearings is a priority direction of locomotive development both for newly constructed locomotives and for those in operation. The solution of the set tasks for introduction of wheel-motor blocks (WMB) with anti-friction bearings demanded the search for alternative variants and new technical solutions. The purpose of the article is to determine the feasibility of re-equipping the diesel locomotive wheel-motor blocks with anti-friction bearings through the life cycle calculation (LCC). Methodology. The procedure and criteria for assessing the economic efficiency of project (investment) proposals and investment projects approved by the Cabinet of Ministers of Ukraine envisage that the cost-effectiveness analysis of an investment project is carried out according to the following criteria: net present value, internal rate of return, discounted payback period and profitability index. The use of these criteria of economic efficiency fully corresponds to modern principles, theoretical-methodical approaches and world practice in evaluating the efficiency of investments. The evaluation of the technical and economic efficiency of the modernization of the diesel locomotive wheel-motor block is made on the basis of calculation and comparison of the following criteria: the net present value (NPV) of modernization, the internal rate of return (IRR), the profitability index (PI) and the discount payback period. Findings. The results of the calculations of the values of the main criteria show that the innovative project for the modernization of the locomotive provides a high level of economic efficiency. At the same time, the value of the discounted payback period of investments in modernization indicates that it is expedient to carry out this operation if the residual life of the upgraded locomotive of the M62 series is at least 15 months. Originality. Taking into account the specifics of the type of locomotive work in freight traffic, we developed a method to determine the individual components of the average annual economic effect of modernization of the diesel locomotive wheel-motor block, which includes saving of oil costs, repairing and servicing the diesel locomotive wheel-motor unit, as well as change of TMSB brass and saving fuel costs for traction. Practical value. The results of the work make it possible to determine the expediency of modernization of diesel locomotives taking into account the features and conditions of their operation and the specifics of modernization.
Highlights
The priority direction of the investment policy of PJSC «Ukrzaliznytsia» in the locomotive economy of Ukraine in recent years is to provide a quick, comprehensive renovation and optimization of the traction rolling stock structure
The purpose of the article is to determine the technical and economic efficiency of the modernisation of locomotive wheel-motor blocks (WMB) traction motor support bearings (TMSB) with antifriction bearings based on life cycle calculation (LCC) calculations
As investment costs we considered the costs associated with the higher cost of the wheel-motor block (WMB) with anti-friction TMSB in comparison with the WMB with plain friction TMSB
Summary
The priority direction of the investment policy of PJSC «Ukrzaliznytsia» in the locomotive economy of Ukraine in recent years is to provide a quick, comprehensive renovation and optimization of the traction rolling stock structure. This is due to the fact that most of the traction rolling stock was procured and delivered to operation even in Soviet times. The traction rolling stock may be renewed due to the purchase of a new one and the modernization of the existing one In both cases, this requires significant capital investments. In the context of market relations and financial constraints, the problem of investment support for the renewal of the tractive rolling stock of the locomotive economy of Ukrainian railways is put forward at the level of problems of national importance, the solution of which directly affects the provision of national security
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