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, Toletti, Ambra, De Martinis, Valerio, Weidmann, Ulrich, 2015 >>
Author(s): Toletti, Ambra, De Martinis, Valerio, Weidmann, Ulrich
Title: What about Train Length and Energy Efficiency of Freight Trains in Rescheduling Models
Abstract: Energy efficiency and train length may be critical during rescheduling, in particular if long freight trains are considered. The first aim of this paper is to investigate how current scheduling and rescheduling models consider train length and energy efficiency. The second aim is to extend a scheduling model that considers train length and energy efficiency for drafting a rescheduling model that minimizes not only delays but also energy consumption. A small numerical example shows that this rescheduling procedure can be fast and yield to a significant reduction of energy consumption. Thus, it is worth further research. However, validation on larger instances, calibration of parameters with real operational data, and methods to speed up the procedure are still needed.2
Published in: Transportation Research Procedia
Volume: 10
Pages: 584 - 594
ISSN: 2352-1465
Publication date / Date received: 2015-01-01
Publication status: Amsterdam
Publication status: Published
Subjects: Energy efficiency, Freight train, Rail operation, Rescheduling, Train length
Event name: 18th Euro Working Group on Transportation (EWGT 2015)
Event date: July 14-16, 2015
Place: Delft, The Netherlands
Language: English
Keyword: Energy efficiency, Freight train, Rail operation, Rescheduling, Train length
DBID source: FORM-1443800583
DOI: 10.1016/j.trpro.2015.09.012
Nebis system number: 010514383
, De Martinis, Valerio, Weidmann, Ulrich, Gallo, Mauro, 2014 >>
Author(s): De Martinis, Valerio, Weidmann, Ulrich, Gallo, Mauro
Title: Towards a simulation-based framework for evaluating energy-efficient solutions in train operation
Abstract: In this paper we propose a simulation-based framework for evaluating energyefficient solutions in train operation. The general framework is composed of an optimisation system able to generate energy-efficient station-to-station speed profiles, looped with a micro-simulation tool for simulating railway traffic conditions, in order to evaluate the impacts on railway systems (delays, conflicts) and energy savings. The optimisation system is a subroutine consisting of a Genetic Algorithm for optimal speed profile parameters optimisation, a speed profile generator, and an energy consumption model. The micro simulation tool allows the evaluation of the impact of energy efficient speed profiles on rail operation. The framework operates on a database composed of 4 subsets: timetable, rolling stock characteristics, signalling system, infrastructure features; the first subset can be considered as the result of scheduling or rescheduling procedures, while the others can be assumed to be fixed. The proposed framework has been applied on a real-scale case of an Italian suburban railway system.
Book title: Computers in railways XIV : railway engineering design and optimization ; Fourteenth International Conference on Railway Engineering Design and Optimization, COMPRAIL XIV ; Rome, 2014
Pages: 721 - 732
ISBN: 978-1-84564-766-7, 978-1-84564-767-4
Publication date / Date received: 2014-01-01
Publication status: WIT Press
Publication status: Published
Event name: 14th International Conference on Railway Engineering Design and Optimization (COMPRAIL 2014)
Event date: June 25, 2014
Place: Rome, Italy
Language: English
DBID source: FORM-1407773530
DOI: 10.2495/CR140601
, De Martinis, Valerio, Weidmann, Ulrich, 2014 >>
Author(s): De Martinis, Valerio, Weidmann, Ulrich
Title: The evaluation of energy efficient solutions in train operation
Subtitle: A simulation-based approach
Abstract: In this paper we draft the lines of a simulation-based framework for evaluating energy-efficient solutions in train operation. The general framework is composed by an optimisation model able to generate energy-efficient station-to-station speed profiles, looped with a micro-simulation tool for simulating railway traffic conditions, in order to evaluate the impacts on railway systems in terms of differences between planned and estimated services and related energy consumption. The optimisation model is a subroutine composed by a genetic algorithm for generating optimal speed profile parameters, a speed profile generator, and an energy consumption evaluation tool. The framework operates on a database composed by 4 subsets: timetable, rolling stock characteristics, signalling system, infrastructure characteristics. A numerical example on a real scale case is proposed, specifically a part of a suburban line that operates in the Canton of Zurich.
Publication date / Date received: 2014-01-01
Publication status: Ascona
Publication status: Published
Subjects: Energy saving, Simulation, Railway
Event name: 14th Swiss Transport Research Conference (STRC 2014)
Event date: May 14-16, 2014
Place: Ascona, Switzerland
Language: English
Keyword: Energy saving, Simulation, Railway
DBID source: FORM-1400077024

 

 

 

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