Energy efficiency in railways: energy storage and electric generation in diesel electric locomotives

Agenjos, Elena; Gabaldón, A.; Franco, Francisco G.; Molina, Roque; Verdú, S.; Ortiz, Mario; Gabaldon, Rafael J.

doi:10.1049/cp.2009.0734

Cited by 19 publications

(21 citation statements)

References 2 publications

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“…Moreover, other important issues being considered were sustainability and social equity: The decrease in interest on conventional low traffic non-electrified lines (the case of the route under study) which deserves small/medium cities and rural areas (i.e., social and economic barriers arise for these areas whereas the development and migration to big cities is stimulated). This possibility resulted in the development of simulator software in Matlab [32,33]. The main purpose of the program was to calculate the energy consumption, energy recovery, and running times of trains.…”

Section: Train Simulatorsmentioning

confidence: 99%

“…Thermal design software, such as EnergyPlus, E_Quest [51], or Modelica, are considered as white box approaches, but they have some drawbacks. This approach is too complex (a high cost for computation time and resources) to evaluate demand response (EnergyPlus works with high order state-space models, e.g., model order around [30][31][32][33][34][35][36][37][38][39][40]. Besides, the identification and evaluation of every necessary parameter are time consuming (and consequently, it is difficult to identify them).…”

Section: Hotel Power (Hotel Loads)mentioning

confidence: 99%

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Analysis, Evaluation and Simulation of Railway Diesel-Electric and Hybrid Units as Distributed Energy Resources

García-Garre

Gabaldón

2019

Applied Sciences

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The objective of this paper involves the analysis, identification and evaluation of different possibilities offered by technology for the improvement and the management of the use of energy and hybridization in railways: On board generation, demand response and energy storage, both in traction and auxiliary loads, considering the aggregation of resources and its stochastic nature. The paper takes into account the importance of efficient use of energy in railways, both currently (trains in service, prototypes) and in the future, considering the trends driven by energy policy scenarios (2030–2050) that will affect service and operation of units during their lifetime. A new activity has been considered that will be relevant in the future in the framework of a new electricity supply paradigm: Smart-Grids. According to this paradigm, the interaction of the Electric Power System and the Railway Supply System (somehow embedded in the Power System) will bring new opportunities for the collaboration of these two systems to perform, in a wise economic fashion, a better and more reliable operation of the complete energy system. The paper is focused on a mixed profile with low-medium traffic (passenger and freight): The first part of the route is electrified (3 kV DC catenary) whereas the second part is not electrified. Results justify that complex policies and objectives bring an opportunity to make cost-effective the hybridization of railway units, especially in low/medium traffic lines, which improves their social and economic sustainability.

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Section: Train Simulatorsmentioning

confidence: 99%

Section: Hotel Power (Hotel Loads)mentioning

confidence: 99%

Analysis, Evaluation and Simulation of Railway Diesel-Electric and Hybrid Units as Distributed Energy Resources

García-Garre

Gabaldón

2019

Applied Sciences

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“…However, when the nominal power P N is selected to be equal to 0.57 Â max(P TE ) ¼ 0.57 Â 3280 ¼ 1880.2 kW on track 1, the cumulative ESS energy released is equal to the cumulative single locomotive traction energy (Figure 9 (a)), and the hybrid locomotive just keeps the balance of energy intake and output to operate. Based on Figure 9(a), the difference between the cumulative ESS energy released and the cumulative single locomotive traction energy can be obtained, and a similar calculation for the energy stored in an ESS can be done using equation (2), which gives that E ESS is equal to 4900 kWh.…”

Section: Smaller Locomotive Replacementmentioning

confidence: 99%

“…The energy generated by dynamic braking is about 10-30% of total locomotive energy usage. 1,2 It is necessary to consider new costeffective technologies to collect, store this energy and reuse it. The options considered for a hybrid rail locomotive will depend on the track topography, locomotive tasks (i.e.…”

Section: Introductionmentioning

confidence: 99%

“…13 Rail operators also have further potential options for energy savings by optimizing the driving style to maximize the use of regenerated energy, and by careful management of the energy storage system (ESS). 5 An ESS for a diesel-electric train was proposed by Agenjos et al 2 that could theoretically achieve a better efficiency without impairing the train's dynamic characteristic (i.e. tractive effort, etc.).…”

Section: Introductionmentioning

confidence: 99%

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Conceptual designs of hybrid locomotives for application as heavy haul trains on typical track lines

Sun

Cole

Spiryagin

et al. 2013

Proceedings of the Institution of Mechanical Engineers, Part F:

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A computer simulation technique has been used to study and evaluate the potential for the application of hybrid locomotives to heavy haul operations on two typical track routes in Australia. The study envisages typical pit-to-port operations with large altitude changes. The train energy usage and the energy created by dynamic braking are analysed based on the simulation results. It is shown that the locomotives operate at an average power that is much less than full power. It is found that there is potential for hybrid heavy haul locomotive applications. Suggested methods and concept designs are proposed. Sizing of the energy storage system when it contained batteries, super-capacitors and flywheels was carried out for comparison purposes. The merits and problems with each concept are discussed.

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Energetic, exergetic, and environmental evaluation of railway transportation by diesel and electric locomotives

Akay

Ustaoğlu

2022

Env Prog and Sustain Energy

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It is critical to reveal the amount of energy and exergy-losses of a system along with environmental issues. This article aims to carry out energy, exergy, and environmental analyses in rail freight trains hauled by diesel and electric locomotives. This study is an important tool for policymakers and energy-planners to gain insight into the performance of the railway-sector, which is an important transportation way in Turkey.It should be a challenge for society and governmental institutions to decrease the losses and to improve the overall performance due to severe energy-problems. The overall energy-efficiency of diesel trains was calculated to be 29.1% as that of exergy-efficiency was 27.2% between 2005 and 2018. In the case of electric-trains, these became 43.4% for 2005-2018. The average overall energy and exergy efficiencies of the railway sector were calculated to be 30.94% and 29.3%, respectively. The results indicate that there is a significant improvement potential in the railway sector.The average carbon emissions of diesel and electric trains are 1.372 kgCO 2 /kWh and 1.346 kgCO 2 /kWh, respectively. The carbon emission of the electric trains per annual useful energy (kg-CO 2 /kWh) is comparatively high due to the electricity generation methods in the country.

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Energy efficiency in railways: energy storage and electric generation in diesel electric locomotives

Abstract: Diesel-electric

Cited by 19 publications

References 2 publications

Analysis, Evaluation and Simulation of Railway Diesel-Electric and Hybrid Units as Distributed Energy Resources

Analysis, Evaluation and Simulation of Railway Diesel-Electric and Hybrid Units as Distributed Energy Resources

Conceptual designs of hybrid locomotives for application as heavy haul trains on typical track lines

Energetic, exergetic, and environmental evaluation of railway transportation by diesel and electric locomotives

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