Results 21 to 30 of about 709,030 (394)

Determination of the Insulation Solution that Leads to Lower CO2 Emissions during the Construction Phase of a Building [PDF]

open access: yes, 2019
The characteristics of the envelope of a building determine, together with other factors, its consumption of energy. Additionally, the climate zone and insulation material may vary the minimum insulation thickness of walls and roofs, making it different,
Bastante-Ceca,   +4 more
core   +3 more sources

Spin-Hall Insulator [PDF]

open access: yesPhysical Review Letters, 2004
Recent theories predict dissipationless spin current induced by an electric field in doped semiconductors. Nevertheless, the charge current is still dissipative in these systems. In this work, we theoretically predict the dissipationless spin Hall effect, without any accompanying charge current, in some classes of band insulators, including zero-gap ...
Murakami, Shuichi   +2 more
openaire   +3 more sources

Polypropylene nanocomposite for power equipment: a review

open access: yesIET Nanodielectrics, 2018
Polypropylene (PP), with high breakdown strength, low dissipation and good processibility, is one of the most widely used dielectric material for power equipment, especially in power capacitors and power cables.
Lu Cheng   +7 more
doaj   +1 more source

Capacitive making of double‐break vacuum circuit breaker: Transverse magnetic field contacts are superior to axial magnetic field contacts

open access: yesIET Generation, Transmission & Distribution, 2022
Previous studies mainly focused on the behaviours of single‐break vacuum circuit breakers (VCBs) in switching capacitor banks. The prestrike characteristics of double‐break VCBs subjected to axial magnetic fields (AMFs) and transverse magnetic fields ...
Yun Geng   +6 more
doaj   +1 more source

Study on high-temperature and high-voltage insulation characteristics of polypropylene blend with highly packed elastomeric domains for power cable applications

open access: yesPolymer Testing, 2023
In this paper, we report the high-temperature and high-voltage (HV) insulation characteristics of the polypropylene (PP) blend with highly packed elastomeric domains that showed excellent mechanical toughness in our previous study to find its suitability
Do-Kyun Kim   +8 more
doaj   +1 more source

Reinforcement influence on non-autoclave foam cement concrete strength characteristics/Armavimo įtaka putų cementbetonio stiprumo charakteristikoms

open access: yesJournal of Civil Engineering and Management, 2000
The volume and surface reinforcement treatment influence on 900–1000 kg/m3 density non-autoclave foam cement concrete strength characteristics are discussed in this paper. Carbon fibres of a length up to 5 mm and diameter of 4, 6-7.7 mkm were used for
Marijonas Sinica   +3 more
doaj   +1 more source

A full sequence impedance modelling and stability analysis of the virtual synchronous generator with inner loops

open access: yesIET Renewable Power Generation, 2021
Virtual synchronous generator (VSG) has been widely studied owing to its inertia support to the grid. However, the stability of VSG is not analysed accurately for actual applications in previous studies that overlook voltage and current inner loops of ...
Yang Peng   +5 more
doaj   +1 more source

Fractional Topological Insulators [PDF]

open access: yesPhysical Review Letters, 2009
We analyze generalizations of two dimensional topological insulators which can be realized in interacting, time reversal invariant electron systems. These states, which we call fractional topological insulators, contain excitations with fractional charge and statistics in addition to protected edge modes.
Levin, Michael, Stern, Ady
openaire   +3 more sources

Study on overvoltage characteristics and arrester configuration strategy for ±1 100 kV HVDC transmission lines

open access: yesThe Journal of Engineering, 2018
Overvoltage caused by faults or switching is one of the decisive factors affecting the insulation level of equipment in UHVDC transmission systems.
Xiaoguang Zhu   +6 more
doaj   +1 more source

Highly conductive polymer nanocomposites for emerging high voltage power cable shields: experiment, simulation and applications

open access: yesHigh Voltage, 2020
High voltage power cables play a critical role in global electricity transmission and distribution. The currently used power cables cannot fulfil the green and sustainable requirement of modern society because of the thermoset nature of cable insulation ...
Xingyi Huang   +6 more
doaj   +1 more source

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