Narrow search
Showing 1 - 10 of 26
Cover Image
Hydrodynamic impact of a tidal barrage in the Severn Estuary, UK
Xia, Junqiang; Falconer, Roger A.; Lin, Binliang - In: Renewable Energy 35 (2010) 7, pp. 1455-1468
The Severn Estuary has a spring tidal range approaching 14m, which is among the highest tides in the world. Various proposals have been made regarding the construction of a tidal barrage across the estuary to enable tidal energy to be generated. The aim of the current study is to investigate the...
Persistent link: https://www.econbiz.de/10010806514
Cover Image
A MCRT and FVM coupled simulation method for energy conversion process in parabolic trough solar collector
He, Ya-Ling; Xiao, Jie; Cheng, Ze-Dong; Tao, Yu-Bing - In: Renewable Energy 36 (2011) 3, pp. 976-985
A coupled simulation method based on Monte Carlo Ray Trace (MCRT) and Finite Volume Method (FVM) is established to solve the complex coupled heat transfer problem of radiation, heat conduction and convection in parabolic trough solar collector system. A coupled grid checking method is...
Persistent link: https://www.econbiz.de/10011045651
Cover Image
Finite-volume modelling of heat and mass transfer during convective drying of porous bodies – Non-conjugate and conjugate formulations involving the aerodynamic effects
Lamnatou, Chr.; Papanicolaou, E.; Belessiotis, V.; … - In: Renewable Energy 35 (2010) 7, pp. 1391-1402
In this study, a numerical procedure is outlined and representative results for heat and mass transfer during convective drying of porous bodies are presented. The Luikov model was implemented and applied both on individual samples of construction materials and agricultural products, as well as...
Persistent link: https://www.econbiz.de/10011045764
Cover Image
Three-dimensional analysis and investigation of the thermal and hydrodynamic behaviors of cylindrical storage tanks
Savicki, Darci L.; Vielmo, Horácio A.; Krenzinger, Arno - In: Renewable Energy 36 (2011) 5, pp. 1364-1373
A numerical analysis of the three-dimensional temperature and velocity fields in horizontal cylindrical storage tanks was performed. The phenomena of laminar natural convection and vertical stratification of temperature were considered. The developed three-dimensional transient computing code...
Persistent link: https://www.econbiz.de/10011046352
Cover Image
Multivariable wind modeling in state space
Teimouri-Sichani, M.; Pedersen, B.J. - In: Renewable Energy 36 (2011) 7, pp. 1964-1972
Turbulence of the incoming wind field is of paramount importance to the dynamic response of wind turbines. Hence … reliable stochastic models of the turbulence should be available from which time series can be generated for dynamic response … and structural safety analysis. In the paper an empirical cross-spectral density function for the along-wind turbulence …
Persistent link: https://www.econbiz.de/10010805503
Cover Image
Study of the influence of imposed turbulence on the asymptotic wake deficit in a very long line of wind turbines
Breton, S.-P.; Nilsson, K.; Olivares-Espinosa, H.; … - In: Renewable Energy 70 (2014) C, pp. 153-163
The influence of imposed turbulence on the development of the flow along a long row of wind turbines is studied, in … for modeling turbulence, and the wind turbine rotors are represented as actuator discs whose loading is determined through …
Persistent link: https://www.econbiz.de/10010805911
Cover Image
The effect of turbulence on noise emissions from a micro-scale horizontal axis wind turbine
Rogers, T.; Omer, S. - In: Renewable Energy 41 (2012) C, pp. 180-184
number of issues such as low wind speeds, high turbulence and noise issues. This paper presents the results of an … investigation carried out to assess the effect of turbulence on the noise emissions from a micro-scale horizontal axis wind turbine …-third octave sound levels to quantify the sound spectrum for the MWT. The second experiment assessed the effects of turbulence on …
Persistent link: https://www.econbiz.de/10010805951
Cover Image
Energy efficiency in process industry – High-efficiency vortex (HEV) multifunctional heat exchanger
Ghanem, Akram; Habchi, Charbel; Lemenand, Thierry; … - In: Renewable Energy 56 (2013) C, pp. 96-104
In the process industry, vortex generators are being increasingly incorporated in modern multifunctional heat exchangers/reactors to enhance heat and mass transfer and thus increase energy efficiency. Longitudinal and transverse pressure-driven vortices and shear-instability-driven flow...
Persistent link: https://www.econbiz.de/10010806119
Cover Image
Gain scheduling control of variable speed WTG under widely varying turbulence loading
Billy Muhando, Endusa; Senjyu, Tomonobu; Urasaki, Naomitsu - In: Renewable Energy 32 (2007) 14, pp. 2407-2423
Probabilistic paradigms for wind turbine controller design have been gaining attention. Motivation derives from the need to replace outdated empirical-based designs with more physically relevant models. This paper proposes an adaptive controller in the form of a linear quadratic Gaussian (LQG)...
Persistent link: https://www.econbiz.de/10010806361
Cover Image
Experimental study of the turbulence intensity effects on marine current turbines behaviour. Part I: One single turbine
Mycek, Paul; Gaurier, Benoît; Germain, Grégory; … - In: Renewable Energy 66 (2014) C, pp. 729-746
The ambient turbulence intensity in the upstream flow plays a decisive role in the behaviour of horizontal axis marine …
Persistent link: https://www.econbiz.de/10010806376