Results 31 to 40 of about 47,018 (262)

Solar and Stellar Winds [PDF]

open access: yesHighlights of Astronomy, 1989
AbstractThis review discusses winds from stars with hot outer atmospheres, stars with coronae similar to the sun. It illustrates how solar observations can be used to test a theoretical model for solar-stellar winds, and thereby provide some insights concerning applications to studying winds from stars other than the sun.
openaire   +1 more source

Virtual composite impedance circulating current suppression strategy with adaptive adjustment capability

open access: yesIET Generation, Transmission & Distribution, 2023
In the process of accessing distributed power sources in microgrid, there will be serious coupling between active power and reactive power, which will lead to significant changes in the inverter outlet voltage and impedance and increase the circulating ...
Jihong Zhang   +4 more
doaj   +1 more source

Design and implementation of a general batch simulation tool of SOWFA and its application in training a single-turbine surrogate

open access: yesEnergy Reports, 2023
Simulator fOr Wind Farm Applications (SOWFA) is a powerful wind farm simulation tool. It is widely used in wake effect research. However, the integration between AI and SOWFA is weak. Without AI, it is difficult for us to fully use SOWFA.
Tannan Xiao   +5 more
doaj   +1 more source

Research on participation of flywheel energy storage in wind farm frequency regulation control

open access: yesZhejiang dianli, 2022
In view of a whole series of problems such as the reduction of system inertia, the increase of frequency fluctuation, and the deterioration of power quality caused by large-scale wind power integration, a flywheel with high power density is designed for ...
ZHANG Jihong   +4 more
doaj   +1 more source

Solar-Wind Structure [PDF]

open access: yes, 2020
Abstract The hot solar atmosphere continually expands out into space to form the solar wind, which drags with it the Sun’s magnetic field. This creates a cavity in the interstellar medium, extending far past the outer planets, within which the solar magnetic-field dominates.
openaire   +1 more source

Tenuous solar winds: Insights on solar wind–magnetosphere interactions

open access: yesJournal of Atmospheric and Solar-Terrestrial Physics, 2008
Abstract During solar cycle 23 quasi-dropouts of the solar wind (density 1 cm - 3 ) were observed. These tenuous winds allow us to probe properties of the magnetosphere and its coupling to the solar wind which would otherwise be obscured by the effect of high density.
Farrugia, Charlie J.   +7 more
openaire   +4 more sources

Exploitation of indoor illumination for typical flat dwellings in the Mediterranean area

open access: yesEnergy Reports, 2023
The 2018/844 Energy Performance of Buildings Directive (EU) has widened the scope of appropriate design of buildings from a pure energy performance and carbon emissions perspective to a wider scope that includes indoor comfort, and indoor air quality ...
Diego Granados-López   +4 more
doaj   +1 more source

Coordinated control of rotor kinetic energy and pitch angle for large‐scale doubly fed induction generators participating in system primary frequency regulation

open access: yesIET Renewable Power Generation, 2021
This paper presents a control strategy of large‐scale wind‐thermal power joint primary frequency regulation. First, an integrated control strategy is established rotor kinetic energy control and pitch angle control for wind turbine generators ...
Peihong Yang   +8 more
doaj   +1 more source

The performance prediction and techno-economic analyses of a stand-alone parabolic solar dish/stirling system, for Jamshoro, Pakistan

open access: yesCleaner Engineering and Technology, 2021
This study aims to propose a simulation as well as mathematical model to carry out the performance assessment and efficiency improvement of a stand-alone Parabolic Solar Dish Stirling (PSDS) system. The simulation for a 25 ​kW PSDS system is performed in
Amjad Ali Lashari, M.E in Electrical Power   +5 more
doaj   +1 more source

Hydrogen generation from methanol with network efficient power control for wireless communication system

open access: yesAIP Advances, 2021
This paper presents a numerical and experimental study on the performance of a methanol steam reformer integrated with a hydrogen/air combustion reactor for hydrogen production.
Hanmin Liu, Jie Shen, Hua Xiang
doaj   +1 more source

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