Results 31 to 40 of about 45,044 (300)

Energy management in pump-controlled actuators

open access: yesFrontiers in Mechanical Engineering
Pump-controlled actuators, or more generically, hydrostatic actuators, have the significant advantage of not relying on valves to control the cylinders. This results in much better energy usage compared to traditional valve-controlled systems.
Gustavo Koury Costa, Nariman Sepehri
doaj   +1 more source

Co-simulation design and experimental study on the hydraulic–pneumatic-powered driving system of main steam and feed water isolation valves for CAP1400

open access: yesAdvances in Mechanical Engineering, 2017
CAP1400 is an advanced large passive nuclear power technology under research and development, and related electromechanical equipment should be improved to guarantee the safety.
Dalei Pan   +5 more
doaj   +1 more source

Energy Management of Low-Pressure Systems Utilizing Pump-Unloading Valve and Accumulator

open access: yesEnergies, 2019
In the context of improving energy efficiency and fuel consumption of mobile hydraulic equipment, it is important to analyze all the sources of power loss occurring within the hydraulic systems. While plenty of analyses have been performed on the working
Patrick M. Stump   +2 more
doaj   +1 more source

Thermal–hydraulic separators unveiled

open access: yesCase Studies in Thermal Engineering, 2022
A key issue in the design of heating/cooling networks consists in attaining the hydraulic independence of the connected circuits while simultaneously providing the required flow rate of thermal fluid at the design temperature under different operation ...
Marzio Piller, Luca Toneatti
doaj   +1 more source

Mathematical modeling of hydraulic chains as cyber-physical objects [PDF]

open access: yesE3S Web of Conferences, 2020
The article attempts to substantiate a new direction of scientific research of pipeline systems (PLS) of the energy sector as cyber-physical objects. The relevance of this direction is determined by the practical formation of new properties of PLSs in ...
Novitsky Nikolay
doaj   +1 more source

Reverse action hydraulic hammer control circuit

open access: yesIOP Conference Series: Earth and Environmental Science, 2021
Abstract The paper describes the mode of functioning of the reverse action hydraulic hammer with piston driven in the positive direction by the energy of air compressed during cocking of the piston by the hydraulic drive. The authors discuss various control circuits of such hydraulic hammers, control sensors, capabilities of the circuits,
BB Danilov, DO Cheshchin
openaire   +1 more source

MOFs and COFs in Electronics: Bridging the Gap between Intrinsic Properties and Measured Performance

open access: yesAdvanced Functional Materials, EarlyView.
Metal‐organic frameworks (MOFs) and covalent organic frameworks (COFs) hold promise for advanced electronics. However, discrepancies in reported electrical conductivities highlight the importance of measurement methodologies. This review explores intrinsic charge transport mechanisms and extrinsic factors influencing performance, and critically ...
Jonas F. Pöhls, R. Thomas Weitz
wiley   +1 more source

Methods for optimization of time redundancy of prosumer in district heating systems

open access: yesEnergy Reports, 2020
The paper deals with the problem of operating the reliability of prosumers as part of a district heating system, taking into account overload time redundancy that they possess.
Ivan Postnikov
doaj   +1 more source

Review of Hydro-Pneumatic Accumulator Models for the Study of the Energy Efficiency of Hydraulic Systems

open access: yesEnergies, 2023
This review article deals with hydro-pneumatic accumulators (HPAs) charged with nitrogen. The focus is on HPA models used in the study of the energy efficiency of hydraulic systems.
Ryszard Dindorf   +2 more
doaj   +1 more source

Redundant electronic circuit provides fail-safe control [PDF]

open access: yes, 1970
Circuit using dual control amplifiers and dual position demand potentiometers powered from separate sources is used for reliable hydraulic valve controller that prevents closure of valve when control circuits fail, and maintains valve control to close ...
Archer, J. W.
core   +1 more source

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