scholarly journals Selection of mathematical model of on-board capacity energy storage as element of hybrid traction unit of motor car rolling stock

2021 ◽  
Author(s):  
Mareks Mezitis ◽  
Vladyslav Panchenko ◽  
Serhiy Yatsko ◽  
Yaroslav Vashchenko ◽  
Anatoliy Sidorenko ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Energy Storage ◽  
Rolling Stock ◽  
Traction Unit ◽  
Selection Of

scholarly journals Traction electric drive based on fuel cell batteries and on-board inertial energy storage for multi unit train

2021 ◽  
pp. 64-72
Author(s):  
V. I. Omelyanenko ◽  
Ie. S. Riabov ◽  
L. V. Overianova ◽  
H. V. Omelianenko
Keyword(s):  
Mathematical Model ◽  
Fuel Cells ◽  
Energy Storage ◽  
Electric Drive ◽  
Power Flow ◽  
Practical Significance ◽  
Rolling Stock ◽  
Power Flow Control ◽  
Traction Electric Drive ◽  
Inertial Energy

The aim of the work is to study the possibility and features of the use of inertial storage devices in the traction electric drive of multi unit train with a power plant based on fuel cells. Methodology. The principle of power flow control in traction electric drives in the modes of acceleration and braking of rolling stock is proposed. The mathematical model of the traction electric drive in the form of the combination of three components: the train, the traction unit and the battery of fuel cells is developed. It was used to study the operation of a traction electric drive when solving a test traction task for rolling stock. Results. It is established that the use of inertial energy storage reduces hydrogen consumption by at least 25 %, which increases the mileage of rolling stock between equipment by more than 30 %. Originality. The traction electric drive on the basis of fuel elements and the inertial energy storage for the multi unit train is offered. The work of the proposed traction electric drive in solving the test traction problem for rolling stock is investigated. Practical significance. A mathematical model of the traction electric drive has been developed. The test traction problem for rolling stock is solved.

scholarly journals Study of Model for Selection of Priorities for Development of Cargo Transportation

2019 ◽  
Vol 67 ◽  
pp. 02003
Author(s):  
Valerii Kuleshov ◽  
Ganna Shapoval ◽  
Maksym Kutsenko
Keyword(s):  
Regulatory Framework ◽  
Market Development ◽  
Rolling Stock ◽  
Cargo Transportation ◽  
Selection Of

The transport market of operator companies of various forms of ownership in Ukraine is constantly evolving, but the tasks associated with the selection and implementation of the priorities of the development of the transport market, the provision of railway services by the carriers - owners of rolling stock, are not fully resolved. There is no regulatory framework that determines the procedure for choosing the priorities of transport market development, their status is not defined, the relation of the selected priorities with the budget of Ukraine is not defined. Therefore, the task of improving the mechanism for selecting scientific and technological priorities for the development of these processes is relevant.

Optimal selection of energy storage nodes based on improved cumulative prospect theory in China

2020 ◽  
Vol 12 (6) ◽  
pp. 064101
Author(s):  
Jicheng Liu ◽  
Zhenzhen Wang ◽  
Yu Yin ◽  
Yinghuan Li ◽  
Yunyuan Lu
Keyword(s):  
Energy Storage ◽  
Prospect Theory ◽  
Cumulative Prospect Theory ◽  
Optimal Selection ◽  
Selection Of

scholarly journals Preparation and Applications of Fluorinated Graphenes

2021 ◽  
Vol 7 (1) ◽  
pp. 20 ◽  
Author(s):  
Yasser Ahmad ◽  
Nicolas Batisse ◽  
Xianjue Chen ◽  
Marc Dubois
Keyword(s):  
Energy Storage ◽  
Chemical Bonding ◽  
Gas Sensing ◽  
Present Review ◽  
Graphite Fluoride ◽  
Fluorinated Graphene ◽  
Selection Of

The present review focuses on the numerous routes for the preparation of fluorinated graphene (FG) according to the starting materials. Two strategies are considered: (i) addition of fluorine atoms on graphenes of various nature and quality and (ii) exfoliation of graphite fluoride. Chemical bonding in fluorinated graphene, related properties and a selection of applications for lubrication, energy storage, and gas sensing will then be discussed.

DIFFERENTIAL EQUATIONS FOR TRAIN STARTING WITH ELASTIC CONNECTIONS

2021 ◽  
Vol 2 ◽  
pp. 18-26
Author(s):  
I.P. POPOV
Keyword(s):  
Mathematical Model ◽  
Differential Equations ◽  
Friction Force ◽  
Static Friction ◽  
Longitudinal Vibrations ◽  
Maximum Tension ◽  
Inert Mass ◽  
The Moment ◽  
Elastic Couplings ◽  
Selection Of

The starting mode for the train is the most difficult. An effective method of pulling is the selection of coupling clearances. In this case, the cars are set in motion sequentially and the inert mass, as well as the static friction force immediately at the moment of starting, are minimal. This method has two significant drawbacks - a small fixed value of the gaps in the couplings and the shock nature of the impulse transfer. These disadvantages can be avoided by using elastically deformable couplings. The aim of this work is to construct a mathematical model of "easy" starting of a train with elastic couplings. The softening of the train start-off mode is essentially due to the replacement of the simultaneous start-off of the sections with alternate ones. To exclude longitudinal vibrations of the composition, after reaching the maximum tension of the coupling, the possibility of its harmonic compression should be mechanically blocked.

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