Most energy storage technologies are considered, including electrochemical and battery energy storage, thermal energy storage, thermochemical energy storage, flywheel energy storage, compressed air energy storage, pumped energy storage, magnetic energy storage, chemical and hydrogen energy storage. …
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Hybrid wheel loaders and excavators, which share the maximum ownership from the global market, 1School of Mechanical Science and Engineering, Jilin …
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Received 26 July 2023, accepted 7 September 2023, date of publication 11 September 2023, date of current version 4 October 2023. Digital Object Identifier 10.1109/ACCESS.2023.3314338 Energy and Operation Characteristics of Electric Excavator With Innovative
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The resulting energy regeneration efficiency ranged from 33.8% to 57.4%, which cannot be realized in conventional boom system. Compared with conventional energy regeneration boom system, the improvement of energy regeneration efficiency with the proposed system was 3.2% to 4.1% for low and moderate velocities.
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Disclosed is an auxiliary power energy-saving device of an excavator, comprising a two-cylinder connecting base (7), a nitrogen cylinder (15), a hydraulic cylinder (2) and a control valve (12), wherein the nitrogen cylinder (15) and the hydraulic cylinder (2) are fixedly ...
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Traditional excavators driven by diesel engine have poor emissions and low energy efficiency. Pure electric driven excavators have high cost and limited endurance. Therefore, at present, hybrid power train system is an ideal candidate for excavators to realize energy-saving and emission reduction. In this paper, a novel series hybrid …
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To verify the effectiveness of this system, a real test bench based on a 6-ton hydraulic excavator was performed. The experimental results showed that 50.1% energy consumption of the boom and 64.9% peak power of the power source can be reduced in the proposed system compared with the double-chamber system.
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Ho and Ahn 2 proposed a novel hydraulic energy-regenerative system for excavator based on a closed-loop hydrostatic transmission hydraulic accumulator, and …
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This article reviews these publications and provides comprehensive references. This article reviews the state-of-art for the hybrid wheel loader and excavator, which focuses on powertrain configuration, …
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Super capacitors are energy storage devices that have the advantages of rapid charging, a high charge, an efficient discharge and a semi-permanent cycle life. In this study, a simulation of the optimal management was performed by applying a super capacitor with these characteristics to the energy regeneration system of an electric excavator.
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The energy storage system with higher power density, higher energy density, small size, long lifetime and low cost is essential for the hybrid system. This paper firstly analyzes the difference among the energy storing elements especially for battery and super capacitor (SC). Secondly, the advantages and disadvantages of different structures …
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Hydraulic excavator energy saving is important to relieve source shortage and protect environment. This paper mainly discusses the energy saving for the hybrid hydraulic excavator. By analyzing the excess energy of three hydraulic cylinders in the conventional hydraulic excavator, a new boom potential energy recovery system is …
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Energy storage hydraulic system and excavator using same. Abstract. The invention provides an energy storage hydraulic system and an excavator using the …
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This study focuses on energy regeneration technologies which can help reduce energy consumption and pollution in hydraulic excavators. First, potential recoverable energy sources in excavator mechanisms are analyzed. Next, energy regeneration systems are classified according to energy storage devices and their …
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The inertia movement of the engine during variable speed control is analyzed to determine the kinetic energy requirements for different start and end operating points. An RBF-based neural network controller is designed based on power optimization to actively compensate the strong hysteresis of the engine speed relative to the optimal torque.
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4. Conclusion. The demand for leakage monitoring of oil pipelines in China continues to increase, due to the Chinese national policy of "carbon peak" and "carbon neutrality", the need for safe and efficient industry development, and the serious loss of life and property caused by leakage accidents.
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Abstract: This paper describes an optimal energy management approach for a fuel cell hybrid excavator (FCHE) powered by a fuel cell (FC) system and energy storage …
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Therefore the energy recovery of working device has an important significance for improving energy utilization ratio for the conventional hydraulic excavator [2, 3]. Several researches on the energy saving of the conventional hydraulic excavator have been proposed [ 4 – 6 ].
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The simulation and the experimental results show that the proposed control method has a much faster response for the energy-saving operating points, which reduces the energy …
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The extremely high recoverable energy density (W rec) and efficiency (η) of lead-free thin films make them a promising candidate for application in miniature power devices.Here, a stable design of multilayered structures of BaTiO 3 (BTO) and Bi[Zn 2/3 (Nb 0.85 Ta 0.15) 1/3]O 3 (BZNT) have been fabricated using the pulsed laser deposition …
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Hence, researchers introduced energy storage systems which operate during the peak energy harvesting time and deliver the stored energy during the high-demand hours. Large-scale applications such as power plants, geothermal energy units, nuclear plants, smart textiles, buildings, the food industry, and solar energy capture and …
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A new hydraulic hybrid excavator potential energy recovery system is proposed in this paper. The energy recovery system uses threechamber cylinders (TCCs) and accumulators to recover potential energy during work cycle. Within this structure, there is no throttle valve in the primary loop, and the recovered energy is stored in the form of …
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In each step in Fig. 4, the corresponding calculation was performed in the entire operation cycle.Thus, in each iteration, the air leakage rate was calculated only once at each time step through the operation period. It can be seen from the summation in Eq. (11) that the convergence of the air leakage rate at one time step requires the …
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Energy saving is an effective method to improve the efficiency of the hydraulic excavator. So, research on the energy saving of hydraulic excavators is very necessary and urgent. Ho and Ahn 2 proposed a novel hydraulic energy-regenerative system for excavator based on a closed-loop hydrostatic transmission hydraulic …
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In [9], the hydraulic transformer was applied to the boom oil circuit of excavator for Innas Corporation. "Eco-Mate" energy saving system of boom for hydraulic excavator was developed by Lars, which was applied to a 50 t hydraulic excavator [10].
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The tunnels and caverns of the Jinzhou underground water-sealed oil storage caverns were excavated using the drill-and-blast method. The excavation footages and support parameters of each cavern were determined by the Q-value of rock masses. Fig. 4 demonstrates the Q-value level of the surrounding rock masses in the 1N and 1S …
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By analyzing the excess energy of three hydraulic cylinders in the conventional hydraulic excavator, a new boom potential energy recovery system is proposed. The mathematical …
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Highlights. •. Different ESEs and the structures of ESS in hybrid systems are compared. •. Research on ESS of several typical hybrid excavators is introduced. •. The …
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The energy saving system was tested on a 21.5-ton hydraulic excavator, and the results showed that the energy consumption of the boom lifting hydraulic circuit …
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