Results 101 to 110 of about 671,560 (304)

Development and demonstration of a renewable energy based demand/supply decision support tool for the building design profession [PDF]

open access: yes, 2001
Future cities are likely to be characterised by a greater level of renewable energy systems deployment. Maximum impact will be achieved when such systems are used to offset local energy demands in contrast to current philosophy dictating the grid ...
Born, F. J.   +2 more
core  

A Programmable Semiconductor Containing Active Molecular Photoswitches Located in the Crystal's Volume Phase

open access: yesAdvanced Functional Materials, EarlyView.
A novel approach for the design of functional semiconductors is presented, which utilizes the excellent optoelectronic properties of layered hybrid perovskites and the possibility to introduce a molecular photoswitch as the organic spacer. This concept is successfully demonstrated on a coumarin‐based system with the possibility to change the bandgap ...
Oliver Treske   +4 more
wiley   +1 more source

A Study on Variable Speed Constant Frequency AC Double- Fed Exciting Wind Power Generation System and Its Control Technology

open access: yesChemical Engineering Transactions, 2017
As a green and recycling energy, wind energy has attracted more and more attention of the people. Relevant utilization techniques are also becoming more and more deep and mature.
Xuan Zhu, Mao Lin
doaj   +1 more source

Universal Electronic‐Structure Relationship Governing Intrinsic Magnetic Properties in Permanent Magnets

open access: yesAdvanced Functional Materials, EarlyView.
Permanent magnets derive their extraordinary strength from deep, universal electronic‐structure principles that control magnetization, anisotropy, and intrinsic performance. This work uncovers those governing rules, examines modern modeling and AI‐driven discovery methods, identifies critical bottlenecks, and reveals electronic fingerprints shared ...
Prashant Singh
wiley   +1 more source

Options for the supply of electricity to rural homes in South Africa

open access: yesJournal of Energy in Southern Africa, 2017
The residential sector in South Africa is being electrified by the South African government on a priority basis. For this purpose, both grid and off-grid electrification options are being used.
Noor Jamal
doaj   +1 more source

Connecting Wind Turbine Generator to Distribution Power Grid—A Preload Flow Calculation Stage [PDF]

open access: yes, 2014
A distribution grid is generally characterized by a high R/X (resistance/reactance) ratio and it is radial in nature. By design, a distribution grid system is not an active network, and it is normally designed in such a way that power flows from ...
Adoghe, A. U.   +5 more
core  

Laser‐Welded Cellulose‐Carbon Nanotube Nanocomposites as a 3D Scaffold of Si Anodes for High‐Performance Lithium‐Ion Batteries

open access: yesAdvanced Functional Materials, EarlyView.
A Si anode comprising entangled networks of cellulose and SWCNT (C‐CNT) nanocomposites as an anode electrode for a high‐performance LIB is realized by fully utilizing the generated microstructure of a novel conductive 3D scaffold via a low‐temperature and eco‐friendly process. Additionally, localized heating via photo‐thermal conversion can be utilized
Boeun Ryu   +5 more
wiley   +1 more source

Asian international grid connection and potentiality of DC superconducting power transmission

open access: yesGlobal Energy Interconnection, 2018
In 2011, a large scale earthquake and tsunami hit the northeastern coast of Japan, and nuclear plants were damaged to a large extent. Before the Tsunami, 54 nuclear plants were operated, however presently, only three nuclear plants are in operation ...
Satarou Yamaguchi   +3 more
doaj   +1 more source

Covalent Organic Frameworks for Photocatalytic CO2 Reduction: Metal Integration Principles, Strategies and Functions

open access: yesAdvanced Functional Materials, EarlyView.
Covalent organic frameworks (COFs) with metals have been recognized as versatile platforms for photocatalytic CO2 reduction (CO2PRR). Herein, an overview of metal integration strategies for COFs is systematically summarized. Regulatory mechanisms and structure–activity relationships between metal integration and COF‐based CO2PRR are emphasized.
Jie He   +5 more
wiley   +1 more source

A Model for Participation of Wind Hydrogen Storage Systems in Active Ancillary Services Market Trading to Improve Wind Power Availability [PDF]

open access: yesDianli jianshe
[Objective] In response to the problems of weak bidding ability and market accommodation ability of wind storage systems in the electricity market, and insufficient optimization of peak shaving ability, and in order to promote renewable energy ...
LI Jianlin, KANG Jingyue, WU Yiwen, JIANG Xiaoxia, LI Xiaozhu
doaj   +1 more source

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