Results 21 to 30 of about 13,571,323 (301)

Effects of Blade Extension on Power Production and Ultimate Loads of Wind Turbines

open access: yesApplied Sciences, 2023
Blade extension is an important type of technical transformation to improve the energy production of turbines for early-built wind farms. To evaluate the effects of blade extension on wind turbines, a 1.5 MW commercial wind turbine with three 37.5 m long
Yuan Li   +5 more
doaj   +1 more source

Living and Working Safely Around High-Voltage Power Lines. [PDF]

open access: yes, 1998
High-voltage transmission lines can be just as safe as the electrical wiring in the homes--or just as dangerous. The crucial factor is ourselves: they must learn to behave safely around them.
United States. Bonneville Power Administration.
core   +1 more source

Cancelled Time: COVID-19 and the Power of Time in Performance and Politics [PDF]

open access: yes, 2022
The COVID-19 pandemic has affected contemporary performing arts in several ways, not least in the form of mass cancellations of performances and production processes in many countries around the world in the year 2020.
Döcker, Georg
core   +1 more source

Preliminary Performance Tests and Simulation of a V-Shape Roof Guide Vane Mounted on an Eco-Roof System

open access: yesEnergies, 2018
The technical and economic features of a patented V-shape roof guide vane (VRGV) with a solar and wind power generation system mounted on an eco-roof system are presented in this paper.
Xiaohang Wang   +6 more
doaj   +1 more source

The Lz-Transform Method for the Reliability and Fault Tolerance Assessment of Norilsk-Type Ship’s Diesel-Geared Traction Drives

open access: yesTransport and Telecommunication, 2018
This paper focuses on a comparative analysis of the most important parameters of an icebreaker ship’s sustainable operations: the operational availability, power performance and power performance deficiency of the multi-state Multi-Power Source Traction ...
Frenkel Ilia   +3 more
doaj   +1 more source

Numerical Analysis of Thermophoresis of a Charged Spheroidal Colloid in Aqueous Media

open access: yesMicromachines, 2021
Thermophoresis of charged colloids in aqueous media has wide applications in biology. Most existing studies of thermophoresis focused on spherical particles, but biological compounds are usually non-spherical.
Yi Zhou   +4 more
doaj   +1 more source

Street Smart or Smart Street? Theater and environmental power [PDF]

open access: yes, 2022
In its first part the essay reflects on an ongoing transformation in the history of power relations by commenting on a short passage from Elfriede Jelinek\u27s 2013 theater text Die Schutzbefohlenen (Charges: The suppliants).
Kirsch, Sebastian
core   +1 more source

Parameter Optimisation of a H-type Three-blade Contra-rotating Vertical-axis Wind Turbine at Low Tip-speed Ratio [PDF]

open access: yesJournal of Applied Fluid Mechanics
Renewable energy sources such as wind energy can alleviate climate deterioration and the global energy crisis, and a major piece of equipment for capturing wind energy is the vertical-axis wind turbine (VAWT), with contra-rotating VAWTs (CR-VAWTs) having
Z. Zhao, K. Chen, Q. Wang, T. Su, H. Hu
doaj   +1 more source

Performance of an Array of Oscillating Water Column Devices in Front of a Fixed Vertical Breakwater

open access: yesJournal of Marine Science and Engineering, 2020
The present study explores the performance of an array of cylindrical oscillating water column (OWC) devices, having a vertical symmetry axis, placed in front of a bottom seated, surface piercing, vertical breakwater.
Dimitrios N. Konispoliatis
doaj   +1 more source

Influence research of cooling and purified water tank on explosion-proof diesel

open access: yesGong-kuang zidonghua, 2017
Eleven working points test and external characteristics test were taken for underground explosion-proof diesel before and after installing cooling and purified water tank.
LI Qiangqiang   +5 more
doaj   +1 more source

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