Results 31 to 40 of about 477,598 (318)

Feasibility studies of a converter-free grid-connected offshore hydrostatic wind turbine [PDF]

open access: yes, 2020
Owing to the increasing penetration of renewable power generation, the modern power system faces great challenges in frequency regulations and reduced system inertia.
Lin, Shuyue, Tong, Xin, Zhao, Xiaowei
core   +1 more source

Energy harvesting from vehicular traffic over speed bumps: A review [PDF]

open access: yes, 2018
Energy used by vehicles to slow down in areas of limited speed is wasted. A traffic energy-harvesting device (TEHD) is capable of harvesting vehicle energy when passing over a speed bump. This paper presents a classification of the different technologies
Blanco-Fernandez, E.   +3 more
core   +3 more sources

Hydraulic accumulators in energy efficient circuits

open access: yesFrontiers in Mechanical Engineering, 2023
Hydraulic accumulators have long been used in hydraulic circuits. Applications vary from keeping the pressure within a circuit branch to saving load energy. Among these applications, storing and releasing energy has gained attention in recent years due to the need for efficient circuits.
Gustavo Koury Costa, Nariman Sepehri
openaire   +2 more sources

Research on hydraulic buffer system of broken belt catch for downward belt conveyor

open access: yesGong-kuang zidonghua, 2019
In order to effectively absorb impact existed in broken belt catch process of downward belt conveyor, a hydraulic buffer system of broken belt catch for downward belt conveyor was proposed.
CHENG Zhifeng
doaj   +1 more source

Research on Response Characteristics and Energy Efficiency of Power Unit Used for Electric Driving Mobile Machine

open access: yesIEEE Access, 2019
Nowadays, the hydraulic pump driven by the diesel engine is widely used as the power unit for mobile machines, which consumes a large amount of fuel and cause high emissions. One solution is to use the electric driving mode.
Xiaogang Zhang   +3 more
doaj   +1 more source

Adaptive fuzzy Proportion Integration Differentiation control in hydraulic offshore wind turbine for optimal power extraction based on the estimated wind speed

open access: yesEnergy Science & Engineering, 2020
In this paper, a novel fuzzy Proportion Integration Differentiation (PID) controller is proposed to extract the optimal energy from wind for a hydraulic offshore wind turbine.
YaJun Fan, AnLe Mu
doaj   +1 more source

Designing of dynamic calculation model of press with pump-accumulator drive working stroke

open access: yesVestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2012
Peculiarities of hydraulic press ram moving on different stages of the working stroke on the basis of experimental oscillogram are considered. Rated scheme of the working stroke with pointing out the assumptions of the hard hydraulic drive model is ...
Oleg M Shinkarenko, Elena S Korchak
doaj   +3 more sources

Modeling and Control of a 600 kW Closed Hydraulic Wind Turbine with an Energy Storage System

open access: yesApplied Sciences, 2018
In this paper, an innovative closed hydraulic wind turbine with an energy storage system is proposed. The hydraulic wind turbine consists of the wind rotor, the variable pump, the hydraulic bladder accumulator, the variable motor, and the synchronous ...
Liejiang Wei   +4 more
doaj   +1 more source

Hydraulic actuator motion limiter ensures operator safety [PDF]

open access: yes, 1971
Device regulates action of hydraulic linkage to control column to minimize hazard to operator. Primary components of device are flow rate control valve, limiter accumulator, and shutoff valve.
Steinmetz, C. P.
core   +1 more source

Influence of Sample Preparation and Processing Procedures on the Thermal Diffusivity of MgO‐C Refractories

open access: yesAdvanced Engineering Materials, EarlyView.
The thermal diffusivity of MgO‐C refractories is highly sensitive to sample preparation and processing procedures. In this article, the effects of coking sequence, machining conditions, structural inhomogeneity, and graphite coating application on measurements using laser flash apparatus are systematically investigated.
Luyao Pan   +4 more
wiley   +1 more source

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