Energy-efficient Train Control Considering Energy Storage Devices …
The optimization of the train speed trajectory and the traction power supply system (TPSS) with hybrid energy storage devices (HESDs) has significant potential to reduce electrical energy consumption (EEC). However, some existing studies have focused predominantly on optimizing these components independently and have ignored the goal …
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A review of hydro-pneumatic and flywheel energy storage for hydraulic systems …
Abstract This review will consider the state-of-the art in the storage of mechanical energy for hydraulic systems. It will begin by considering the traditional energy storage device, the hydro-pneumatic accumulator. Recent advances in …
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An Electric-Hydrostatic Energy Storage System for Hydraulic …
The in-wheel motor adopts an electric connection, effectively reducing mechanical losses and thus producing high energy recovery efficiency. The energy storage devices for automobile regenerative ...
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Energy saving and performance enhancement of hydraulic fineblanking press assisted with controllable hydraulic …
In this study, a novel double-stage hydraulic system incorporating a hydraulic controllable accumulator (HCA) was proposed to simultaneously improve the energy and working efficiency of the hydraulic fineblanking press. Within this system, an innovative controller was proposed to orchestrate the HCA''s operations, allowing it to …
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Free Full-Text | Impact of On-Board Hybrid Energy …
To improve the energy-efficiency of transport systems, it is necessary to investigate electric trains with on-board hybrid energy storage devices (HESDs), which are applied to assist the traction and recover …
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Research on energy saving system of hydraulic excavator based …
Total energy recovered by the energy saving device (kJ) 333.78 376.00 709.78 Total energy released by the energy saving device (kJ) 292.16 321.05 613.21 Energy contribution from the energy saving device to the boom (kJ) 235.08 233.62 468.70 Energy saving
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EC approves €26.3 million to support hydroelectric pumped …
Finland notified the commission of its plan to support SEVO, a subsidiary of EPV, in the conversion of a non-active mine in Pyhäsalmi into a pumped …
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(PDF) Review of the Energy Saving Hydraulic System Based on …
Shen et al. [41] provide an overview of common pressure rail-based hydraulic systems, that can be widely used for construction equipment. Energy savings can be achieved through the ability to ...
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Energy saving in hydraulics
Possibilities for energy saving result from measures to reduce the energy demand and energy loss as well as to recover energy. Specifically these are the following measures (Table E 2): Measures for energy recovery. HAWE Hydraulik develops and produces hydraulic components and systems for mechanical and plant engineering.
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Energy-saving improvements of hydraulic system for loader''s working device …
Abstract: This paper first introduces the working principle of the hydraulic system on the loader, followed by a detailed analysis of reasons for the energy loss caused by its moving arm working process of hydraulic system, and thus anglicizing the pressure loss of the original system, especially the throttling losses when the oil go through the reversing …
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An energy-saving method to reduce the installed power of hydraulic …
Highlights. An energy-saving hydraulic drive system based on the flywheel energy storage system and variable frequency control is developed. The installed power and average energy consumption of the traditional hydraulic press machines can be reduced by 30% and 40%, respectively.
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Pumped Hydro-Energy Storage System
5.5 Pumped hydro energy storage system. Pumped hydro energy storage system (PHES) is the only commercially proven large scale ( > 100 MW) energy storage technology [163]. The fundamental principle of PHES is to store electric energy in the form of hydraulic potential energy. Pumping of water to upper reservoir takes place during off-peak hours ...
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The Role of Energy Storage Solutions in a 100% Renewable …
A 100% renewable energy scenario was developed for Finland in 2050 using the EnergyPLAN modelling tool to find a suitable, least-cost configuration. Hourly …
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Fuel-Saving Solution for Forklifts Using Hydraulic Energy Storage and Regeneration Device …
To solve this, the solution is to design and manufacture an additional device cluster to save fuel and reduce emissions. It is both economically and environmentally viable with the right technology. This article proposes the structure and working principle of an additional hydraulic device cluster to increase the working efficiency of the above types of forklifts.
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Strategies to improve the energy efficiency of hydraulic power unit with flywheel energy storage …
An energy-saving hydraulic drive unit based on flywheel energy storage system is presented. The storage capacity and operational stability of traditional flywheel energy storage system is improved. Motor slip rate and overload capacity for traditional hydraulic power unit is optimized.
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Comparison and assessment of a hydraulic energy-saving …
A novel hydraulic energy-saving system for hydrostatic drives using flywheels as energy storage systems is proposed in this paper. The system has been …
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World''s first commercial sand battery begins energy storage in Finland …
This is a thermal energy storage system, effectively built around a big, insulated steel tank – around 4 metres (13.1 ft) wide and 7 metres (23 ft) high – full of plain old sand. When this ...
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Hydraulic Accumulator as Energy Storage
Therefore, the energy efficiency of the system can be improved by implementing an energy regeneration device that recovers the released energy. 36, 37 Currently, batteries, supercapacitors ...
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Power control strategy and performance evaluation of a novel electro-hydraulic energy-saving system …
One such electric ERR system, which integrates hydraulic/electric energy recovery/regeneration, is called an electro-hydraulic energy-saving system (EHESS) and is proposed in this paper. The EHESS consists of an assist hydraulic pump, regeneration hydraulic motor, UC, and electric motor/generator, which can recover potential energy of …
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A high-efficient solution for electro-hydraulic actuators with energy …
[24,25], a self-contained electro-hydraulic cylinder was developed and compared with a valve-controlled system and found a 66% energy saving. However, all the latter studies that addressed the energy consumption of EHAs for heavy-duty applications provide results only for specific loading conditions.
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(PDF) Research On Energy Saving and Performance Enhancement of High-End Hydraulic Press With Controllable Accumulator
Considering the types o f the energy storage device i n hydraulic system, the most 107 common used is the hydraulic accumulator because it can be easily integrated into the hydraulic system.
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Energy-saving mechanism research on beam …
The field-test result of the secondary-balance device shows that the root-mean-square torque is decreased by 22.7%, and the energy-saving rate of the motor reaches 6.54%. View Show abstract
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Design optimization of hydraulic energy storage and conversion system for wave energy …
Wave energy collected by the power take-off system of a Wave Energy Converter (WEC) is highly fluctuating due to the wave characteristics. Therefore, an energy storage system is generally needed to absorb the energy fluctuation to provide a smooth electrical energy generation. This paper focuses on the design optimization of a …
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Electronics | Free Full-Text | Energy Saving Implementation in Hydraulic …
With the growing cost of electrical energy, the necessity of energy-saving implementation in industries based on energy audits has become a major focus area. Energy audit results indicate energy-saving potential in an application and require the physical presence of the auditor''s team for monitoring and analyzing the energy …
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Hydraulic storage: advantages and constraints
The advantages of hydraulic storage. These range from the maturity of the technology to the massive nature of the storage, not forgetting the speed of response times, the power reserve and the ability …
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Energy saving in working hydraulics of long booms in heavy working vehicles …
Novel component for energy saving in long boom working vehicles is proposed. The total efficiency of the original system is only 29% and new system reaches 62% efficiency. Hybridization of heavy off-highway working vehicles brings considerable energy savings in the form of a downsized internal combustion engine (ICE) by means …
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Energy analysis and optimization of main hydraulic system in …
In this system, the energy losses among multiple energy-conversion processes are significant, particularly in the hydraulic energy conversion, resulting in low energy efficiency. To address this issue, this study proposes a three-dimensional vertical arrangement for a hydraulic press that reduces energy dissipation and improves the …
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Thermal energy storage for electric vehicles at low temperatures: Concepts, systems, devices …
High-temperature TES device is a packed bed or storage tank structure, so as the scale increases, the proportion of TES materials in the device increases, and the heat storage density also increases. Therefore, for small vehicles, medium and low temperature PCMs can be used to reduce the volume and weight occupied by thermal insulation.
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Comparison and assessment of a hydraulic energy-saving …
Recently, most of the energy conservation research focuses on the energy recovery and hybrid power drive for a construction machinery. [1][2][3][4][5][6][7][8][9][10][11][12] For example, a novel ...
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Energy saving solutions for a hydraulic excavator | Request PDF
When the energy storage hydraulic cylinder [10,11] or energy storage chamber [12] [13] [14] is used to recover the gravitational potential energy, the gravity of the working device can also be ...
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An energy-saving method to reduce the installed power of hydraulic …
A lot of energy-recovery circuits have been applied in hydraulic press machines. Yan et al. [18] proposed a flywheel energy-saving system (FESS) that can store the redundant energy at no-load ...
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Accumulator-pump-motor as energy saving system in hydraulic …
Sun W, Virvalo T. Accumulator-pump-motor as energy saving system in hydraulic boom. In Koskinen KT, Vilenius M, editors, The Eight Scandinavian International Conference on Fluid Power, Proceedings of the Conference, May 7-9, 2003, Tampere, Finland, SICFP´03.
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Strategies to improve the energy efficiency of hydraulic power unit with flywheel energy storage …
Furthermore, flywheel energy storage system array and hybrid energy storage systems are explored, encompassing control strategies, optimal configuration, and electric trading market in practice. These researches guide the developments of FESS applications in power systems and provide valuable insights for practical measurements …
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Energy saving and performance enhancement of hydraulic fineblanking press assisted with controllable hydraulic …
The hydraulic accumulator is widely used for storing energy in hydraulic system, but it is a passive device; the flowrate and volume of hydraulic oil adjusted by the accumulator are not well ...
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Energy recovery for hybrid hydraulic excavators: flywheel-based …
It also provided a comparison among lithium-ion batteries, ultracapacitors, hydraulic accumulators, high-speed flywheels, serving as energy storage devices in corresponding ERSs. Flywheels show advantages over its opponents in terms of many aspects, such as specific power, energy efficiency, cycle lifetime, and environmental …
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Journal of Energy Storage
The long energy transmission chain not only significantly increases the size and cost of the device but also decreases the efficiency of energy storage and reutilization. In contrast, HERS generally uses accumulators to store hydraulic energy directly in a hydro-pneumatic way, which shortens the energy transmission chain [ [8], …
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Analysis of emerging technologies in the hydropower sector
Variable speed hydropower generation and its application in pumped storage power plants are presented in detail. Moreover, revolutionary concepts for …
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Modeling and control strategy analysis of a hydraulic energy-storage wave energy conversion system …
The hydraulic energy-storage devices are more stable, which realize the decoupling of the front-end energy capture stage and back-end generation stage, simplify the system control strategy and improve the output power quality [3].
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Strategies to improve the energy efficiency of hydraulic power …
An energy-saving hydraulic drive unit based on flywheel energy storage system is presented. The storage capacity and operational stability of traditional flywheel …
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