Results 21 to 30 of about 232,160 (310)

An oriented-design simplified model for the efficiency of a flat plate solar air collector [PDF]

, 2010
In systems design, suitably adapted physical models are required. Different modelling approaches for a solar air collector were studied in this paper. First, a classical model was produced, based on a linearization of the conservation of energy equations.
LUNA, David, Jean-Pierre Nadeau, Yves Jannot, JANNOT, Yves, David Luna, NADEAU, Jean-Pierre   +5 more
core   +1 more source

Exceptional water production yield enabled by batch-processed portable water harvester in semi-arid climate

Nature Communications, 2022
Sorption-based atmospheric water harvesting has the potential to realize flexible water production but reaching high water yield in semi-arid climate is still challenging. Here, the authors report a portable and modularized water harvester with scalable,
He Shan, Chunfeng Li, Zhihui Chen, Wenjun Ying, Primož Poredoš, Zhanyu Ye, Quanwen Pan, Jiayun Wang, Ruzhu Wang   +8 more
doaj   +1 more source

Optimal Scheduling of Integrated Community Energy Systems Based on Twin Data Considering Equipment Efficiency Correction Models

Energies, 2023
The economics of integrated community energy system (ICES) dispatch schemes are influenced by the accuracy of the parameters of the different energy-conversion-equipment models.
Zeli Ye, Wentao Huang, Jinfeng Huang, Jun He, Chengxi Li, Yan Feng   +5 more
doaj   +1 more source

Virtual composite impedance circulating current suppression strategy with adaptive adjustment capability

IET 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, Yunfei Liu, Yili Wei, Xin Zhang, Zhenkui Wu   +4 more
doaj   +1 more source

Solar Sailing: applications and technology advancement [PDF]

, 2011
Harnessing the power of the Sun to propel a spacecraft may appear somewhat ambitious and the observation that light exerts a force contradicts everyday experiences.
Macdonald, Malcolm, Malcolm Macdonald
core   +1 more source

Status of Four-Junction Cell Development at Fraunhofer ISE

E3S Web of Conferences, 2017
Four-junction solar cells are being developed for space applications as they promise higher efficiencies compared to the present GaInP/GaInAs/Ge triple-junction industry standard.
Lackner D., Höhn O., Walker A.W., Niemeyer M., Beutel P., Siefer G., Schachtner M., Klinger V., Oliva E., Hillerich K., Kubera T., Guter W., Bett A.W., Dimroth F.   +13 more
doaj   +1 more source

A review of solar collectors and thermal energy storage in solar thermal applications [PDF]

, 2013
Thermal applications are drawing increasing attention in the solar energy research field, due to their high performance in energy storage density and energy conversion efficiency. In these applications, solar collectors and thermal energy storage systems
Zhao, Changying, Tian, Yuan, Tian, Y. (Yuan), Zhao, C.Y.   +3 more
core   +1 more source

Vertical bifacial PV systems: irradiance modeling and performance analysis of a lightweight system for flat roofs

EPJ Photovoltaics
Vertical bifacial photovoltaic (PV) systems are gaining interest as they can enable deployment of PV in locations with grid or area limitations. Over Easy Solar has developed a lightweight design for vertical bifacial systems for flat roofs employing ...
Øgaard Mari B., Nysted Vilde Stueland, Rønneberg Sigrid, Otnes Gaute, Foss Sean Erik, Mongstad Trygve, Riise Heine N.   +6 more
doaj   +1 more source

Assessment of the Phase-to-Ground Fault Apparent Admittance Method with Phase/Ground Boundaries to Detect Types of Electrical Faults for Protective Relays Using Signature Library and Simulated Events

International Transactions on Electrical Energy Systems, 2022
Protective relays in electric power grids recognize the types of electrical faults in a few seconds. The most common detection method to detect the types of electrical faults is based on measuring the angle between the zero and negative sequence currents.
Emilio C. Piesciorovsky, Marissa E. Morales Rodriguez   +1 more
doaj   +1 more source

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

Zhejiang 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, CUI Tianxiang, XIONG Wei, WU Zhengkui, ZHANG Zilei   +4 more
doaj   +1 more source