Global Trends in the Development of Battery-Powered Underground Mining Machines

Abstract The growing requirements and needs of users as well as a strong emphasis on pro-ecological solutions cause an increasing interest in battery-powered electric mining machines. Internal combustion machines consume oxygen, generate noise, fumes and heat, which affects work in underground mines, and minimizing these factors is expensive. Battery solutions allow achieving the same operational parameters of machines with significantly higher safety, comfort and work culture. The problem, however, is their range or working time. The article presents global trends in the development of battery-operated machines for underground mining. Various machines in battery-powered versions have been presented. The applied solutions have been discussed, especially in the field of battery replacement or recharging and braking energy recovery. Manufacturers around the world offer more and more battery-powered machines. Some producers are announcing complete replacement of combustion solutions with electric ones within the next few years. There are also hydrogen machines on the horizon, which will probably be the next step on the road to a zero-emission industry.

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Study, Development and Prototyping of a Novel Mild Hybrid Power Train for a City Car: Design of the Turbocharger

Applied Sciences ◽

10.3390/app11010234 ◽

2020 ◽

Vol 11 (1) ◽

pp. 234

Author(s):

Roberto Capata ◽

Enrico Sciubba

Keyword(s):

Energy Recovery ◽

The Novel ◽

Construction Costs ◽

Power Train ◽

The Road ◽

On The Road ◽

Braking Energy Recovery ◽

Mild Hybrid ◽

Commercial Equipment ◽

Study Development

Within a large, state-funded, Italian National Project aimed to test the feasibility of an on-the-road prototype of a mild hybrid city vehicle, one of the tasks was to conceive, design and implement an innovative turbocharger that would allow for some energy recovery. The selected vehicle is propelled by a 3-cylinder, 998 cc turbocharged engine (the 66 kW Mitsubishi-Smart W451). The idea is to implement two types of energy recovery: one via the new turbocharger and one through a standard braking energy recovery (also known as KERS). The study of the former is the object of this paper. The proposed turbocharger configuration consists of mechanically separated, electrically coupled compressor and turbine, possibly mounting only slightly modified commercial equipment to reduce construction costs. This paper reports the results of the calculation of the behavior of the new turbocharging group across the entire engine operating range and describes the preliminary design of the unit. An accurate simulation of a mixed (urban and extra-urban) driving mission demonstrates that a net saving of about 5.6% can be attained by the installation of the novel turbocharger unit.

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THE SYSTEM OF ROLLING-STOCK’s PARAMETERS OF INTERMODAL PIGGYBACK TRANSPORTATION

The Russian Automobile and Highway Industry Journal ◽

10.26518/2071-7296-2020-17-2-262-272 ◽

2020 ◽

Vol 17 (2) ◽

pp. 262-272

Author(s):

A. V. Tsyganov ◽

N. A. Osintsev

Keyword(s):

Systems Approach ◽

Mutual Influence ◽

Transport Systems ◽

Rolling Stock ◽

Necessary Condition ◽

Operational Parameters ◽

Weight Restrictions ◽

The Road ◽

On The Road ◽

Railway Rolling Stock

Introduction. The priority area of transport systems development is the formation of transport corridors with multimodal systems and intermodal cargo delivery technologies, ensuring the achievement of economic, social and environmental goals facing the countries. For the transport system of Russia, which claims to advance transit cargo flows through its territory, the solution to the above problems can be achieved by organization of the piggyback transportation. A necessary condition for the organization of effective piggyback transportation in domestic and international traffics is the systematization of parameters and the assessment of technical compatibility of the involved rolling-stock.Methods and models. A systems approach is used to represent piggyback transportation as a complex technical system consisting of road vehicles, domestic and foreign railway rolling-stock interacting in intermodal terminals. The ER-model is used to describe the conceptual scheme of the piggyback system.Results. The parameters of the road and railway rolling-stock are justified and systematized, their mutual influence is determined at the level of compatibility of their technical and operational parameters in the organization of domestic and international piggyback transportation. Systematization, structuring, storing and updating of rollingstock parameters are carried out using the database «Determining the rolling-stock basic parameters of piggyback delivery systems» developed in Microsoft Access.Conclusion. The developed system of parameters allows to assess technical compatibility of road and railway rolling-stock of the countries participating in piggyback transportation, and can also be used for unification of intermodal transport units and harmonization of the overall weight restrictions on the road and railway networks.Financial transparency: the authors have no financial interest in the presented materials or methods. There is no conflict of interest.

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Research on Regenerative Braking of Pure Electric Mining Dump Truck

World Electric Vehicle Journal ◽

10.3390/wevj10020039 ◽

2019 ◽

Vol 10 (2) ◽

pp. 39

Author(s):

Wei Zhang ◽

Jue Yang ◽

Wenming Zhang ◽

Fei Ma

Keyword(s):

Energy Consumption ◽

Economic Performance ◽

Energy Recovery ◽

Regenerative Braking ◽

Dump Truck ◽

Drive Cycle ◽

The Road ◽

Braking Force ◽

Mining Dump Truck ◽

Braking Energy Recovery

When the pure electric mining dump truck is working, it mainly ascends the slope at full load and descends the slope at no load. The loading state of the vehicle and the slope of the road will directly affect its axle load distribution and braking force distribution. In this paper, the slope dynamics analysis of the pure electric double-axle four-wheel drive mining dump truck was carried out. Based on the regenerative braking priority strategy, four regenerative braking control methods were developed based on the Matlab/Simulink platform and ADVISOR 2002 vehicle simulation software to study the ability of regenerative braking energy recovery and its impact on vehicle economic performance. The simulation results show that the regenerative braking priority control strategy used can maximize the regenerative braking force of the vehicle; the regenerative energy recovery capability of pure electric mining dump truck is proportional to the regenerative braking force that can be provided during braking; the two-axis braking strategy based on the I curve and the β line can make full use of the front and rear axle regenerative braking force when the braking intensity is large, and recover more braking energy; under road drive cycle, the single-axis braking force required to the braking strategy based on the maximized front axle braking force is the largest among all strategies, the motor braking efficiency is the highest, and the recovered braking energy is the most. For the studied drive cycle, the regenerative braking technology can reduce the vehicle energy consumption by 1.06%–1.56%. If appropriate measures are taken to improve the road surface condition and reduce the rolling resistance coefficient from f = 0.04 to f = 0.02, the regenerative braking technology can further reduce the vehicle energy consumption to 4.76%–5.73%. The economic performance of the vehicle is improved compared to no regenerative braking. In addition, the vehicle loading state and the driving motor working efficiency also directly affect the regenerative braking energy recovery capability of the pure electric mining truck.

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Impact of the road conditions on the amount of braking energy

Combustion Engines ◽

10.19206/ce-2017-445 ◽

2017 ◽

Vol 171 (4) ◽

pp. 265-268

Author(s):

Tomasz SZCZEPAŃSKI ◽

Anna SKARBEK-ŻABKIN ◽

Paweł DZIEDZIAK

Keyword(s):

Monte Carlo ◽

Monte Carlo Method ◽

Energy Recovery ◽

Combustion Engine ◽

Urban Agglomeration ◽

The Road ◽

Energy Recuperation ◽

The Monte Carlo Method ◽

Design Solutions ◽

Braking Energy Recovery

The issue of energy recuperation is increasingly found in modern cars (both electric and hybrid, as well as powered by a combustion engine only). Road conditions are one of the essential factors determining the appropriateness of using certain design solutions in braking energy recovery systems. This article presents an analysis of road conditions prevailing in a large urban agglomeration together with an evaluation of their usefulness for utilizing the braking energy. Road tests were carried out for this purpose, and their analysis used the Monte Carlo method to determine the pseudo-accidental courses.

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Proposal for a Submerged Floating Tube Bridge as part of the Bømlafjord crossing

IABSE Congress, Stockholm 2016: Challenges in Design and Construction of an Innovative and Sustainable Built Environment ◽

10.2749/stockholm.2016.1959 ◽

2016 ◽

Author(s):

Mathias Egeland Eidem ◽

Jorunn Sekse ◽

Arianna Minoretti

Keyword(s):

Complete Replacement ◽

The Road ◽

On The Road

A proposal for a Submerged Floating Tube Bridge as part of a scheme for a new and improved fixed link along the E39 route, across the Bømlafjord in Norway, is presented.<p> The existing crossing is not able to satisfy the previsions of the increase in traffic and the new rules on the road alignment and gradient. The new requirements, including the need of a carriageway with two lanes for each direction, imply a complete replacement of the existing tunnel with a longer one. The possibility to substitute the new bridge, necessary for the northern part of the crossing, with a SFTB (Submerged Floating Tube Bridge) allow to reduce the parts of the tunnel in the southern part that have to be substituted. The advantages of the proposed scheme for the crossing are evaluated and discussed. A comparison, in terms of costs, of the different solutions for the design is presented.

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