This paper focuses on developing an integrated reliable and sophisticated model for ultra large wind turbines And to study the performance and analysis of vector control on large wind turbines. With the advance of power electronics technology, direct driven multi-pole radial flux PMSG (Permanent Magnet Synchronous Generator) has proven to be a good choice for wind turbines manufacturers. To stu...

ZnCl2 hydrate, the main molten salt used in biomass conversion, combined with low concentration HCl is an excellent solvent for the dissolution and hydrolysis of the carbohydrates present in lignocellulosic biomass. The most recalcitrant carbohydrate, cellulose, is dissolved in a residence time less than 1 h under mild conditions without significant degradation. This technology is referred to a...

Thin Film Solar Cells In article number 2300073, Darius Kuciauskas and co-workers present a device model for back contacts of CdTe solar cells, using combination electro-optical surface analysis measurements, developed by researchers at NREL First Solar.

Single-walled carbon nanotubes (SWCNTs) have highly desirable attributes for solution-processable thin-film photovoltaics (TFPVs), such as broadband absorption, high carrier mobility, and environmental stability. However, previous TFPVs incorporating photoactive SWCNTs have utilized architectures that have limited current, voltage, and ultimately power conversion efficiency (PCE). Here, we repo...

Water vapor total column measurements using the Elodie Archive at Observatoire de Haute Provence from 1994 to 2004 A. Sarkissian and J. Slusser LATMOS, CNRS UMR 8190, Université Versailles Saint-Quentin, Institut Pierre-Simon Laplace, 91371 Verrières-le-Buisson, France USDA, UV-B Radiation Monitoring Program, NREL, Colorado State University, Fort Collins CO 80521, USA now retired Received: 28 J...

The present study investigates the impact of rotor solidity and blade profile on self-starting characteristics performance H-Darrieus wind rotors (H-rotors) through subsonic tunnel experiments. Three symmetrical (NACA 0018) three unsymmetrical (NREL S823) H-rotors were analyzed to determine coefficient static torque (Cts) power (Cp) across solidities (σ = 0.25, 0.3, 0.35) two free stream speeds...