scholarly journals ENERGY EFFICIENT SOLUTIONS IN INFRASTRUCTURE PROJECTS OF SORTING COMPLEXES OF RAILWAY STATIONS

2021 ◽  
pp. 13
Author(s):  
O. DEMIANCHUK ◽  
A. BABARYKINA
Keyword(s):  
Probability Theory ◽  
Energy Efficiency ◽  
Energy Efficient ◽  
Economic Effect ◽  
Efficient Solutions ◽  
Railway Stations ◽  
Methods Of Calculation ◽  
Statistics And Probability ◽  
Reduction Of Energy Consumption ◽  
The Given

Purpose. Improving approaches and methods of calculation and design of energy-efficient sorting slides of railway stations, taking into account the mechanization of their braking positions based on the use of modern car moderators, including energy efficient structures. Methodology. The research was performed using the methods of the theory of bitter calculations in combination with the tools of mathematical statistics and probability theory. The assessment of the possible economic effect was carried out taking into account the technical and economic calculations on the criterion of the given savings of annual costs. Results. An estimate of the predicted value of the speed of the very good runner at the entrance to the brake positions when calculating their needs. An adaptive approach to the calculation of the required power of the 1st and 2nd brake positions on the descent part of the sorting slides is proposed. The condition of technological reliability and "survivability" of the system of control of speeds of movement of couplings at rolling down from a sorting hill is checked taking into account action of probabilistic factors. The economic effect of reducing the need for car decelerators for the braking positions of the slides, as well as energy efficiency of sorting complexes. Practical value. The obtained important scientific and practical results to substantiate the reduction of energy consumption and increase the energy efficiency of sorting stations can be used to develop new projects and to survey the parameters of existing sorting complexes, including non-mechanized slides.

scholarly journals Feedforward Tactical Optimization for Energy-Efficient Operation of Freight Trains: The Swiss Case

2018 ◽  
Vol 2672 (10) ◽  
pp. 278-288 ◽  
Author(s):  
Valerio De Martinis ◽  
Ambra Toletti ◽  
Francesco Corman ◽  
Ulrich A. Weidmann ◽  
Andrew Nash
Keyword(s):  
Energy Efficiency ◽  
Energy Efficient ◽  
Real Data ◽  
Efficient Solutions ◽  
Future Market ◽  
Speed Profile ◽  
Efficient Operation ◽  
The North ◽  
Simulation Based ◽  
Profile Optimization

The optimization of rail operation for improving energy efficiency plays an important role for the current and future market of rail freight services and helps rail compete with other transport modes. This paper presents a feedforward simulation-based model that performs speed profile optimization together with minor rescheduling actions. The model’s purpose is to provide railway operators and infrastructure managers with energy-efficient solutions that are tailored especially for freight trains. This work starts from the assumption that freight train characteristics are completely defined only a few hours before actual departure; therefore, small specific feedforward adjustments that do not affect the surrounding operation can still be considered. The model was tested in a numerical example. The example clearly shows how the optimized solutions can be evaluated with reference to energy saved and robustness within the rail traffic. The evaluation is based on real data from the North–South corridor crossing Switzerland from Germany to Italy.

scholarly journals MULTIPARAMETRIC OPTIMIZATION OF THE SHAPE AND THICKNESS OF INSULATED ENERGY EFFICIENT CONSTRUCTED BUILDING WITH A SPECIFIC NUMBER OF FACES

2021 ◽  
pp. 196-204
Author(s):  
Viacheslav Martynov
Keyword(s):  
Energy Efficiency ◽  
Energy Efficient ◽  
Heat Losses ◽  
Geometrical Parameters ◽  
Energy Efficient Buildings ◽  
Multiparametric Optimization ◽  
Heat Influx ◽  
Number Of Faces ◽  
The Given ◽  
First Time

To calculate the optimal parameters of outbuildings, a mathematical model and method for optimizing the shape and resistance of heat transfer for opaque and transparent structures with a certain constant number of faces, building volume and amount of insulation to minimize the thermal balance of enclosing structures with the environment during the heating period In the course of calculations the geometrical parameters of translucent, opaque structures in the heat-insulating shell of buildings are determined taking into account heat losses, heat influx from solar radiation by the criterion of ensuring minimum heat losses through enclosing structures, rational parameters (buildings) The given technique and mathematical models should be used in the future in the design of energy efficient buildings in the reconstruction and thermal modernization of buildings. This will increase their energy efficiency and, accordingly, the energy efficiency class of buildings. For the research faceted attached building in the form of a triangular pyramid, the reduction in heat loss was 14.82 percent only due to the optimization of the shape and redistribution of the insulation. Similar results were obtained for other initial forms. For the first time, a computerized method was proposed, an algorithm and application package Optimparam for multiparameter shape optimization and insulation of translucent and opaque structures for outbuildings with a given number of arbitrarily arranged faces were developed.

scholarly journals Implementation of Energy Efficiency Management System in Multi-Storey Residential Houses in Littoral Regions of Latvia

2020 ◽  
Vol 8 (1) ◽  
pp. 1-11
Author(s):  
Baiba Pļaviņa ◽  
Gita Actiņa
Keyword(s):  
Energy Efficiency ◽  
Data Collection ◽  
Baltic Sea ◽  
Energy Efficient ◽  
Management System ◽  
Process Management ◽  
Residential Buildings ◽  
Efficient Solutions ◽  
The Baltic Sea ◽  
The Baltic

AbstractBased on EU guidelines and national development plans, energy efficient process management has been slowly implemented in Latvian regions in the context of the Directive 2012/27/EU putting forward two binding indicative national energy efficiency goals for Latvia: (1) to achieve 1.5 % of energy savings delivered to final consumers every year, and (2) to renovate 3 % of the state-owned buildings annually. The aim of the paper is to reflect the management system of energy efficient processes in public and residential buildings in Latvian littoral regions of the Baltic Sea, which can be an important factor for achieving the goals of the Directive. The paper presents the results of the research on energy efficient processes in public and residential buildings in Latvian littoral regions of the Baltic Sea in order to determine the existing challenges. Methods applied in the research are data collection, grouping, analysis and comparison, studies of regulatory documents, as well as statistical data collection and analysis. Contribution of the research is the improvement of energy efficient solutions in public and residential buildings in littoral regions of the Baltic Sea by using the estimated energy efficient processes. The results of the research are of international importance and can be applied not only in public and residential buildings in littoral regions of the Baltic Sea but also in other regions with similar climate or energy efficient process management problems in order to improve the selection of criteria of energy efficient solutions and renovation.

Assessment of efficiency of energy optimal driving mode for system of «pilot-free» movement of electric multiple units on the Moscow Central Ring

2020 ◽  
pp. 89-93
Author(s):  
Vasiliy Titovich Cheremisin ◽  
◽  
Mikhail Mikhaylovich Nikiforov ◽  
Alexander Sergeevich Vilgelm ◽  
Sergey Yuryevich Ushakov ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Power Consumption ◽  
Energy Efficient ◽  
Experimental Studies ◽  
Central Ring ◽  
Driving Mode ◽  
Optimal Driving ◽  
The Given ◽  
Smooth Acceleration ◽  
Multiple Units

According to results of experimental studies within the framework of the Moscow Central Ring the authors revealed the best trips of drivers in terms of energy efficiency of train traction. The analysis of these trips allowed determining riding techniques that provide energy saving: smooth acceleration and braking at unconditional performance of the given train schedule. On the basis of the developed simulation model of the Moscow Central Ring it is established that the use of energy efficient techniques of riding with the on time train performance can reduce the power consumption on train traction by 13.3 %.

scholarly journals Return on investment in the implementation of energy-efficient solutions for facade insulation

2018 ◽  
Vol 251 ◽  
pp. 05041 ◽  
Author(s):  
Olga Gamaunova ◽  
Tatiana Musorina
Keyword(s):  
Energy Efficiency ◽  
Energy Efficient ◽  
Return On Investment ◽  
Positive Impact ◽  
Integrated Approach ◽  
Efficient Solutions ◽  
Payback Period ◽  
Capital Costs ◽  
Efficiency Measures ◽  
The Cost

In this article the technique of determination of payback period of investments taking into account capital costs and economy of means at the expense of implementation of energy saving actions for warming of external protecting designs is considered. Presented in the article the method of assessing the return on investment in the implementation of energy-efficient solutions of facade insulation is only evaluative. For more accurate calculations it is necessary to take into account the discount rate. Nevertheless, the main factors that have a positive impact on reducing the payback period of investments in the renovation of facades are identified. Only an integrated approach to improving the energy efficiency of buildings can not only reduce the cost of operation of buildings, but also provide a reduction in the payback period of investment in the implementation of energy efficiency measures.

scholarly journals Energy Efficient Control by the Group of Oil Pumping Stations Operation

2021 ◽  
pp. 13-22
Author(s):  
Gennadii Kaniuk ◽  
◽  
Andrii Mezeria ◽  
Victoria Kniazeva ◽  
Tetiana Fursova ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Total Energy ◽  
Energy Efficient ◽  
Economic Effect ◽  
Energy Losses ◽  
Efficient Operation ◽  
Operation Modes ◽  
Pumping Stations ◽  
Efficient Control ◽  
Pumping Units

This work is devoted to intensification of the power efficiency of computerized systems of con-trol by the pumping units group of oil pumping stations of the main lines. The criterion of the energy efficiency is a minimum total energy loss. The goal set can be reached by the develop-ment of algorithms of the energy efficient control. The most important scientific result based on the identification of the mathematical models of the objects controlled is the efficient algorithm for controlling the group of oil pumping units. It allows determining in real time the operation modes of separate pumping units, upon which the total energy losses will be minimal. The sig-nificance of the results obtained consists in the energy losses decrease across the main oil pipe-line during the combined control by the pumping units groups. Their practical significance con-sists in decreasing the cost of oil transportation at the expense of decreasing the energy con-sumed by the pumping units. The main stages of plotting the modes maps were presented of the efficient operation of the pumping units based on the definition of the necessary rotation fre-quencies and positions of the regulating valves. Experimentally was performed the analysis of the operation modes of the pumping unit using different methods for productivity regulation, and their comparative energy efficiency was shown. The experimental data extrapolation was carried out, and, on its basis, the possible economic effect was determined brought by the use of the energy-conserving systems of the controlling the group of pumping systems.

scholarly journals ANALYSIS AND CHOICE OF RESEARCH METHODS RELIABILITY OF AUTOTRACTOR ENGINES

2019 ◽  
pp. 35-45
Author(s):  
Victor Anisimov ◽  
Vasyl Muzychuk
Keyword(s):  
Probability Theory ◽  
Technological Progress ◽  
Residual Life ◽  
Dimensional Theory ◽  
Automotive Engines ◽  
Statistics And Probability ◽  
Acceptable Method ◽  
Short Time ◽  
The Given ◽  
Current Stage

The study of the reliability of the engine as a whole can be represented as a study of the probabilistic characteristics of its reliability according to the given probabilistic characteristics of the reliability of individual engine elements, that is, systems and mechanisms. The article substantiates that the method of similarity and dimensional theory allows us to establish patterns of change in the wear rate tgα depending on the adjustment of the engine parameters, and numerous experiments are required, which makes it little practical in determining the resource and predicting the operation of tractor engines. A more practically acceptable method for determining the residual life of automotive engines is the method of mathematical statistics and probability theory, and, in particular, the law of normal distribution. However, to determine the resource of engines, using this law, it is also necessary to conduct a large amount of testing. Thus, at the current stage of scientific and technological progress in automotive engineering, it is necessary to find other methods that are most practically acceptable and contribute in a short time, without a large amount of testing, to determine the resource of machines with maximum durability, which will be developed in subsequent works of the authors of the article.

Intersections and Contrasts between Energy Efficiency and Flexibility in Production Machinery Energy - An Analysis Regarding Energy Optimisation

2018 ◽  
Vol 882 ◽  
pp. 36-44
Author(s):  
Martin Brugger ◽  
Christoph Richter ◽  
Gunther Reinhart
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Energy Efficient ◽  
Paper Industry ◽  
Efficient Solutions ◽  
Related Activity ◽  
Metal Production ◽  
Energy Optimisation ◽  
Different Characteristics

Energy efficiency is a well-known and often implemented energy-related activity with a variety of different characteristics and fields of application. Energy efficient solutions, especially for pneumatic and electric intensive processes, are usually applied to minimise the electric and pneumatic energy consumption in the field of production. Especially in complex machinery it must be avoided that the energy consumption influences the productivity or quality of the product. On the other hand, due to volatile energy supply from renewable sources, there is a growing awareness of energy flexibility, which is mainly implemented on energy-intensive processes such as metal production, foundries, chemical processes and paper industry. An increase of the energy flexibility potential of machines often influences the energy efficiency. In other cases, energy efficiency and energy flexibility actions can be conducted without an interaction. This paper compares the definition and characteristics of energy efficiency as well as energy flexibility actions. An application of energy flexibility as well as efficiency actions can lead to optimised energy consumption behaviour of production machinery.

scholarly journals Energy-efficient solutions of foundry class steelmaking electric arc furnace

2021 ◽  
pp. 81-87
Author(s):  
S.M Timoshenko ◽  
M.V Gubinski ◽  
E.M Niemtsev
Keyword(s):  
Mass Transfer ◽  
Energy Efficiency ◽  
Energy Loss ◽  
Heat And Mass Transfer ◽  
Energy Efficient ◽  
Refractory Lining ◽  
Efficient Solutions ◽  
Arc Furnace ◽  
Transfer Processes ◽  
Mass Transfer Processes

Purpose. Substantiation of solutions aimed at reducing heat losses, mainly, by refractory lining during forced downtime and by steelmaking bath in conditions of traditionally low specific power of transformer. Methodology. Mathematical modeling of heat and mass transfer processes and numerical experiment. Findings. A mathematical model of energy-technological processes in arc furnace workspace has been developed to analyze and minimize energy consumption in daily production cycle. Geometrical and operating parameters are taken into account, in particular: variation in arcs energy efficiency at evolution of wells in charge under electrodes during melting process; circulation of melt due to bubbling with inert gas through bottom porous plug; energy loss on heat accumulation by refractory, with cooling water and off-gas. Originality. For the first time, the concept of increasing energy efficiency of arc furnace has been substantiated, based on the following set of solutions: increase in specific electrical power by reducing of charge at given productivity; reduction of bath shape factor (ratio of diameter to depth) from traditional 5 up to 2.5 by deepening and, accordingly, its radiating surface; optimization of walls and roof cooled surface relative area, where massive heat-absorbing refractory lining is not used; application of energy-saving water-cooled elements with spatial structure that promotes formation of heat-insulating and heat-accumulating slag filling. Practical value. Implementation of the set of energy-efficient solutions in conditions of typical 6 and 12-t foundry class arc furnaces provides reduction in power consumption and refractory expenditure by 1315 and 2830% respectively without significant changes in production infrastructure due to reducing energy loss, mainly, for accumulation of heat by refractory lining, and intensification of heat and mass transfer processes in forcibly stirred deep bath.

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