An Energy Efficient Hydraulic Winch Drive Concept Based on a Speed-Variable Switched Differential Pump

2017 ◽  
Author(s):  
Lasse Schmidt ◽  
Torben O. Andersen ◽  
Henrik C. Pedersen ◽  
Anders H. Hansen
Keyword(s):  
Energy Efficient ◽  
Motion Tracking ◽  
Low Frequency ◽  
Efficient Solutions ◽  
Direct Drive ◽  
Power Losses ◽  
Servo Drive ◽  
Hydraulic Motors ◽  
General Drive ◽  
Four Quadrant

The application of valve driven hydraulic winch drives is related to substantial power losses, primarily due to throttle generated valve flows. More energy efficient solutions are also commonly applied in terms of conventional hydrostatic closed circuit drives as well as so-called secondary controls. Such solutions are typically constituted by many and rather expensive components, and are furthermore often suffering from low frequency dynamics. In this paper an alternative solution is proposed for winch drive operation, which is based on the so-called speed-variable switched differential pump, originally designed for direct drive of hydraulic differential cylinders. This concept utilizes three pumps, driven by a single electric servo drive. The concept is redesigned for usage in winch drives, driven by flow symmetric hydraulic motors and single directional loads as commonly seen in e.g. active heave compensation applications. A general drive configuration approach is presented, along with a proper control strategy and design. The resulting concept is evaluated when applied for active heave compensation. Results demonstrate control performance on level with conventional valve solutions in terms of motion tracking, however with improved efficiency, especially in the event that the electrical servo drive can realize four quadrant operation.

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.

Introduction of Energy Efficient Solutions During Cast Iron Smelting at PJSC “NLMK”

Metallurgist ◽  
2019 ◽  
Vol 63 (3-4) ◽  
pp. 335-340 ◽  
Author(s):  
S. V. Filatov ◽  
I. F. Kurunov ◽  
V. N. Titov ◽  
S. A. Zagainov
Keyword(s):  
Cast Iron ◽  
Energy Efficient ◽  
Efficient Solutions ◽  
Iron Smelting

scholarly journals Contemporary built environment in the context of evolution of energy-efficient solutions in architecture

2018 ◽  
Vol 174 ◽  
pp. 01024
Author(s):  
Stanisława Wehle-Strzelecka
Keyword(s):  
Energy Consumption ◽  
Built Environment ◽  
Natural Environment ◽  
Energy Efficient ◽  
Residential Development ◽  
Efficient Solutions ◽  
New Development ◽  
European Development ◽  
The Subject ◽  
Housing Estates

The article is concerned with the subject of energy consumption in construction; it also discusses problems related to creation of sustainable built environment and its links to the natural environment, with special emphasis placed on its links to climate. Selected contemporary European development directions and trends in solutions using solar energy in buildings have been discussed in the paper, as well as various projects, concepts and realisations, mostly related to residential development. The collected examples present the experiences of previous eras as well as their continuation contemporary realisations based on the possibilities of using innovative technologies in architecture within the framework of actions undertaken in European countries. They are to be found in various scales referring to whole districts, housing estates and housing complexes as well as individual buildings. They refer both to new development and to transformations of the existing infrastructure in the process of its restoration.

Development of a New High Frequency Two Quadrant DC-DC Sepic Converter

2018 ◽  
Vol 5 (1) ◽  
pp. 31-40
Author(s):  
Md. Maidul Islam ◽  
Md. Mamun Ur Rashi
Keyword(s):  
High Frequency ◽  
Energy Efficient ◽  
Coupling Effect ◽  
Spice Simulation ◽  
Supply Source ◽  
Efficient System ◽  
Power Coupling ◽  
System A ◽  
Multiple Input ◽  
Four Quadrant

The DC-DC converter find a wide scope in industries, telecommunication sectors, power electronics area, etc. Nowadays bi-directional converters have a higher end over them since the energy from the load during regenerative braking is fed back to the source, thus obtaining energy efficient system. A single topology that can provide Buck-Boost operation with positive output having four quadrant operations is not available in the literature.  A common limitation of power coupling effect in some known multiple-input dc-dcconverters has been addressed in many kinds of literatures. In this paper, a new single topology of two quadrants DC-DC Sepic converter has been developed to provide four quadrant operation of a high- frequency dc-dc converter having one supply source and proper control of the converter. The combined topology has been analyzed and studied by spice simulation.

Rational Methods of Concentration of Small, Thin, Finely Dispersed and Colloidal Gold of Technogenic Waste Deposits Will Ryveem

2018 ◽  
Vol 22 (10) ◽  
pp. 11-17 ◽  
Author(s):  
V.V. Karmazin ◽  
I.O. Krylov ◽  
P.A. Sysa ◽  
M.A. Frolov
Keyword(s):  
Rock Mass ◽  
Colloidal Gold ◽  
Energy Efficient ◽  
Low Frequency ◽  
Gold Deposits ◽  
Point Of View ◽  
Efficient Technology ◽  
Theoretical Substantiation ◽  
Technogenic Waste ◽  
Energy Efficient Technology

The potential of the ore-bearing territory and the dumps of the former mine placed on it are estimated from the point of view of application of new technological solutions that will allow to process the man-made rock mass profitably. The nature of the distribution of gold by size classes is established, which can significantly reduce the volume of processed rock mass. Theoretical substantiation of acceleration of natural segregation with application of low-frequency sound influence is given. The segregation-diffusion concentration of gold is proposed, which allows in the future to create an energy-efficient technology of recovery from man-made waste and apply it to the processing of gold deposits still in the depths.

Energy Efficient Optical Network – An Implementation Perspective Survey

2012 ◽  
Vol 524-527 ◽  
pp. 2545-2548
Author(s):  
Jian Hua Shen ◽  
Xin Ran Shi ◽  
Ji Xiang Lin ◽  
Jian Chen
Keyword(s):  
Information And Communication Technology ◽  
Communication Technology ◽  
Energy Efficient ◽  
Optical Network ◽  
Efficient Solutions ◽  
Burst Switching ◽  
Information And Communication ◽  
Energy Consumptions ◽  
Multiple Granularity ◽  
Network Technologies

Due to the fast growth of energy consumption in modern industry especially the Information and Communication Technology (ICT) society, many attentions are focused on better energy efficient solutions. In this paper, we provide an implementation perspective survey on employed optical network technologies’ power consumption features. We investigate major techniques of current optical network and corresponding energy consumptions. Some promising techniques are proposed including burst switching, multiple granularity traffic grooming, unified control plane and Green PON to achieve energy efficiency.

New Forged Steels Energy-efficient Solutions for Stronger Parts

ATZ worldwide ◽  
2012 ◽  
Vol 114 (3) ◽  
pp. 4-9 ◽  
Author(s):  
Hans-Willi Raedt ◽  
Ulrich Speckenheuer ◽  
Klaus Vollrath
Keyword(s):  
Energy Efficient ◽  
Efficient Solutions
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