According to the inherent characteristics of the hydraulic power take-off (PTO) system, the output power of a generator tends to be intermittent when the wave is random. Therefore, this paper aims to improve the effective utilization of wave energy and reduce power intermittency by constructing a topology with two branches to transmit …
There are some efforts in improving the energy density of hydraulic energy storage to achieve balanced performance. Therefore in this study an electric …
In current pure electric-hydraulic excavators, the main power source is the battery, and the working device of the load is the hydraulic system. How to make full use of the advantages of electric …
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 …
The Encyclopedia of Energy is published by the Association des Encyclopédies de l''Environnement et de l''Énergie, contractually linked to Grenoble Alpes University and Grenoble INP, and sponsored by the Academy of Sciences.To cite this article, please mention the author''s name, the title of the article and its URL on the Encyclopedia …
In recent years, some scholars studied deeply on the application of hydraulic system driven pumping unit. For instances, a mechanical-hydraulic torque coupling transmission mecha-nism is adopted to realize the energy storage and release through the hydraulic
The hydraulic accumulator has the advantages of high power density, fast response, stable operation and high cost performance. However, compared with the electric energy storage method, the …
In terms of efficiency and compared to the open-circuit EHA, from one side the closed-circuit benefits from the contribution of the accumulator as high-efficient energy storage. However, the lower energy efficiency of the hydraulic pump prevails worsening the overall efficiency of the system.
A bed lift kit typically comprises hydraulic or gas strut mechanisms, brackets, and hardware. It''s designed to convert a regular bed into an adjustable one, facilitating effortless height adjustment. This kit maximizes space utilization by creating under-bed storage
Citation: Yue T, Yuan P, Huang S, Zhu F, Li Y, Huang C, Zheng L, Wang H and Liu M (2022) Experimental Analysis and Performance Evaluation of Spider Hydraulic Buffer for Rod Dropping in Reactor. Front. Energy Res. 10:868211. doi: 10.3389/fenrg.2022.
Tie-Rod Hydraulic Cylinder High-strength threaded steel rods hold the two end caps to the cylinder barrel in tie rod hydraulic cylinders. Small bore cylinders usually have 4 tie rods, while large bore cylinders requiring as many as 16 or 20. in order to retain the end
Storing hydraulic fluid under pressure is a way of storing energy for later use. Perhaps the most common application for an accumulator is supplementing the pump flow in a hydraulic system in which a high flow rate is required for a brief period of time. Types of 1. ...
The GPE can be directly converted into hydraulic energy and stored in the accumulator. When the boom lifts, the accumulator discharges high-pressure oil into the …
A new type of compressed air energy storage system modeling and control method for HWTs was proposed in Li et al. 31 and Li 32 and a nonlinear controller was designed to realize maximum power point tracking (MPPT) and to absorb the power fluctuations in hydraulic pipes. ...
B. Hydraulic drive pumping unit model Compared with the conventional beam pumping unit, the 3d models are shown in Figs 2 and 3 can be clearly seen from Figs 2 and 3 that the cylinder body, crank, …
Based on a mechanism study, the regulation and control mechanism of the hydraulic energy storage system is elaborated in detail, and the regulation and control …
Hydro-pneumatic cycling compressed air energy storage (HC-CAES) is a new branch of CAES, in which the concept of a liquid piston is introduced; here, the liquid comes in contact with the gas directly and works together, …
An Improved Hydraulic Energy Storage Wave Power-Generation System Based on QPR Control January 2023 Energies 16(2):647 DOI:10.3390 ...
The energy-saving characteristics of the 6-ton excavator are emphatically analyzed considering energy storage and re-utilization. At last, experiment verifications …
A new hydraulic hybrid excavator driving system was proposed concerning on the issues that the loss of energy was too large and the energy recovery efficiency was not high …
2. Maximum energy storage of hydraulic fracture The hydraulic fracture energy storage essentially relies on fracture opening and closing to achieve energy conversion while ensuring that fracture expansion does not occur. In actual formations, considering the effect of ...
Energy storage fracturing technology is a technical means by which oil displacement fluid is injected into the reservoir before the traditional hydraulic fracturing and subsequent implement fracturing. It …
As a result, potential energy stored at the moving mass is simply wasted, in the form of heat. To overcome this, a novel Energy Storage and Reutilization (ESR) system is designed …
To improve vehicle fuel economy whilst enhancing road handling and ride comfort, power generating suspension systems have recently attracted increased attention in automotive engineering. This paper presents our study of a regenerative hydraulic shock absorber system which converts the oscillatory motion of a vehicle suspension into …
B. Hydraulic drive pumping unit model Compared with the conventional beam pumping unit, the 3d models are shown in Figs 2 and 3. It can be clearly seen from Figs 2 and 3 that the cylinder body, crank, balance weight, belt drive, brake mechanism and other
The beam pumping units applied in oilfield for more than 150 years, because it had the advantages of simple structure, reliable and durable. At present, it is still one of the most important artificial lift methods in the world. Due to the inherent structure of the beam pumping units, the balanced torque curve of gearbox has a bigger fluctuation …
A typical structure of hydraulic energy-storage wave energy conversion system is shown in Fig. 1.The working process is as follows. The rod-side and piston-side of double-acting hydraulic cylinder alternatively work under the …
A novel electric-hydraulic hybrid drivetrain incorporating a set of hydraulic systems is proposed for application in a pure electric vehicle. Models of the electric and hydraulic components are …
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