Energy Recovering Using Regenerative Braking in Diesel–Electric Passenger Trains: Economical and Technical Analysis of Fuel Savings and GHG Emission Reductions

Rail transport, specifically diesel–electric trains, faces fundamental challenges in reducing fuel consumption to improve financial performance and reduce GHG emissions. One solution to improve energy efficiency is the electric brake regenerative technique. This technique was first applied on electric trains several years ago, but it is still considered to improve diesel–electric trains efficiency. Numerous parameters influence the detailed estimation of brake regenerative technique performance, which makes this process particularly difficult. This paper proposes a simplified energetic approach for a diesel–electric train with different storage systems to assess these performances. The feasibility and profitability of using a brake regenerative system depend on the quantity of energy that can be recuperated and stored during the train’s full and partial stop. Based on a simplified energetic calculation and cost estimation, we present a comprehensive and realistic calculation to evaluate ROI, net annual revenues, and GHG emission reduction. The feasibility of the solution is studied for different train journeys, and the most significant parameters affecting the impact of using this technique are identified. In addition, we study the influence of electric storage devices and low temperatures. The proposed method is validated using experimental results available in the literature showing that this technique resulted in annual energy savings of 3400 MWh for 34 trains, worth USD 425,000 in fuel savings.

Exergy and Energy Analysis of Wind-Thermal System

Current wind systems are intermittent and cannot be used as the baseload energy source. The research on the concept of wind power using direct thermal energy conversion and thermal energy storage, called wind powered Thermal Energy System (WTES), opened the door to a new energy system called Wind-thermal, which is a strategy for developing baseload wind power systems. The thermal energy is generated from the rotating energy directly at the top of the tower by the heat generator, which is a simple and light electric brake. The rest of the system is the same as the tower type concentrated solar power (CSP). This paper’s results suggest that the energy and exergy performance of the WTES (62.5% and 29.8%) is comparable to that of conventional wind power, which must be supported by the backup thermal plants and grid enhancement. This cogeneration nature of the WTES system makes this system suitable for using wind power as a direct heat source in several heat-demanding processes such as chemical production. Also, the light heat generator reduces some issues of wind power, such as noise and vibration, which are two main bottlenecks of the wind power technology.

Innovative and Efficient Electric Braking System in High-Speed Trains using Proportional Resonant Controller

The high-speed trains are eight times more efficient than traditional trains because it significantly operates faster than the other trains; however, the train accidents are happened as because of its poor braking system. From this reason, effective braking system control techniques are developed. In this paper, the electric brake regenerative system is introduced to control the high-speed train. Therefore the braking system of a high-speed train is modeled in Brushless Direct Current (BLDC) motor, which is controlled by the gain of Proportional Resonant (PR) controller. Subsequently, the parameters of the controller and error percentage from the controller in the braking system are optimized using Multi-Objective African Buffalo Optimization (MOABO). The developed controller in braking system stability is analyzing by the Lyapunov function. The results of the braking system are validating by the torque and speed of the high-speed train braking system. Furthermore, the proposed high-speed braking system control is compared with existing control techniques in a high-speed train.

HISTORY OF THE GOSNITI ESTABLISHMENT

With the increase in the production of new machines, it was necessary to pay more attention to their repair and maintenance, expand research, create appropriate standards, and constantly update technical documentation. The pre-1953 repair laboratories were not powerful enough to solve the growing problems. In 1953, it was decided to establish The State Union Research Institute for the Repair and Operation of Tractors and Agricultural Machinery. (Research purpose) The research purpose is in describing the history of GOSNITI establishment, analyzing the tasks and results of the Institute's activities over the first decade. (Materials and methods) The article presents the base of the new Institute and its quantitative composition. The article describes the main objectives of the Institute and its activities. (Results and discussion) Work was carried out to create self-moving workshops for filling filters, electric brake stands, stands for testing fuel equipment, equipment for vibration contact surfacing. The calculations of the repair base for the regions were carried out. The article presents the list of works that were widely implemented in the national economy and the list of publications of technical documentation. GOSNITI was awarded the Order of the Red Banner of Labor by the decree of the Presidium of the Supreme Soviet of the USSR on May 25, 1967, for implementing the system and advanced technology for repairing cars. (Conclusions) The staff of the established Institute successfully completed the tasks set in the first decade.