Author: L.X. Zhang, Y.B. Liang, X.H. Liu, Q.F. Jiao, J. GuoYear Published: 2013 Numerical simulation had become an attractive method to carry out researches on structure design and aerodynamic performance prediction of straight-bladed vertical axis wind turbine, while the prediction accuracy was the major concern of CFD. Based on the present two-dimensional CFD model, a…
Author: Zhengshun Chenga, Helge Aagaard Madsend, Zhen Gaoa, Torgeir MoanPublication: Energy ProcediaYear Published: 2016 Recently the interest in developing vertical axis wind turbines (VAWTs) for offshore application has been increasing. Among the aerodynamic models of VAWTs, double multi-streamtube (DMST) and actuator cylinder (AC) models are two favorable methods for fully coupled modeling and dynamic analysis…
Author: Theocharis Tsoutsosa, Androniki Tsouchlarakia, Manolis Tsiropoulosa, Michalis SerpetsidakisbPublication: Applied EnergyYear Published: 2009 The visual impact of wind turbines is one of the main factors affecting public acceptance of wind parks. This paper evaluates the visual impact of a wind park in Chania, Crete, using the Spanish method of evaluation. The outcomes are combined with…
Author: Erik NordmanPublication: Grand Valley State UniversityYear Published: 2010 Shadow flicker occurs when the sun is low in the sky and a wind turbine creates a shadow on a building. As the turbine blades pass in front of the sun, a shadow moves across the landscape, appearing to flick on and off as the turbine…
Author: Giuseppe ErbaPublication: Epilepsy FoundationYear Published: 2006 Certain individuals are born with special sensitivity to flashing lights or contrasting visual patterns, such as stripes, grids and checkerboards. Because of this condition, their brain will produce seizure-like discharges when exposed to this type of visual stimulation.
Author: Thomas PriestleyPublication: NEWEEPYear Published: 2011 The alternating changes in light intensity that can occur at times when the rotating blades of wind turbines cast moving shadows on the ground or on structures.
Publication: World Wind Energy AssociationYear Published: 2016 “Worldwide wind capacity reached 456 GWs” and would likely grow at 8-10% in 2016, a slower pace than had been achieve in recent years. A growth of 50,000 MWs per year would be slow, and in 13 years, would result in the 1M+ MWs of installed world wide.…
Author: Ryan Wiser, Mark BollingerPublication: Berkeley LabYear Published: 2016 This report shows that in the early years (1982-2004) of HAWT development, the industry realized a “learning curve” of 14.4%, meaning that costs per kWh dropped at this rate year on year. WHI predicts that VAWTs will realize a similar “learning curve” as they increase in…
Publication: Wind Harvest InternationalYear Published: 2016 The three major factors leading to a projected lower Leveled Cost of Energy for VAWT created wind energy in CA than the alternatives are, they make double use of existing wind farm assets, they can be installed in high energy land where HAWTS can’t, and they can achieve the…
Publication: National Renewable Energy LaboratoryYear Published: 2014 The data from the Life Cycle Harmonization Project show that life cycle greenhouse gas (GHG) emissions from technologies powered by renewable resources are generally less than from those powered by fossil fuel-based resources. Only the very highest estimates for biopower overlap with the range of a fossil-fueled technology, and the central…