scholarly journals Startup Speed with Dead Band in Wind Farms with Low-Medium Wind Speed Profile—Case Study of Hong Kong

2017 ◽  
Vol 09 (04) ◽  
pp. 562-572
Author(s):  
Zuliang Yin ◽  
Bo Bai ◽  
Jiani Liu ◽  
Sheng Su
Keyword(s):  
Hong Kong ◽  
Wind Speed ◽  
Wind Farms ◽  
Speed Profile ◽  
Wind Speed Profile ◽  
Dead Band

scholarly journals An empirical-analytical model of the vertical wind speed profile above and within an Amazon forest site

2015 ◽  
Vol 23 (1) ◽  
pp. 158-164 ◽  
Author(s):  
Cledenilson Mendonça de Souza ◽  
Cléo Quaresma Dias-Júnior ◽  
Júlio Tóta ◽  
Leonardo Deane de Abreu Sá
Keyword(s):  
Wind Speed ◽  
Analytical Model ◽  
Vertical Wind ◽  
Forest Site ◽  
Amazon Forest ◽  
Speed Profile ◽  
Wind Speed Profile ◽  
Vertical Wind Speed

scholarly journals The interaction between drifting snow and atmospheric turbulence

1998 ◽  
Vol 26 ◽  
pp. 167-173 ◽  
Author(s):  
Richard Bintanja
Keyword(s):  
Surface Layer ◽  
Wind Speed ◽  
Atmospheric Surface Layer ◽  
Order Approximation ◽  
Atmospheric Stability ◽  
Blowing Snow ◽  
Speed Profile ◽  
Stability Parameters ◽  
Wind Speed Profile ◽  
First Order

This paper presents a modelling study of the influence of suspended snow on turbulence in the atmospheric surface layer. Turbulence is diminished in drifting and blowing snow, since part of the turbulent energy is used to keep the particles in suspension. This decrease in turbulence directly affects the vertical turbulent fluxes of momentum and snow particles (and other scalars), and can effectively be simulated by introducing an appropriate Richardson number to account for the stability effects of the stably stratified air-snow mixture. We use a one-dimensional model of the atmospheric surface layer in which the Reynolds stress and turbulent suspended snow flux are parameterized in terms of their mean vertical gradients (first-order closure). The model calculates steady-state vertical profiles of mean wind speed, suspended snow mass in 16 size classes and stability parameters. Using the model, the influence of snowdrifting on the wind-speed profile is quantified for various values of the initial friction Velocity (which determines the steepness of the initial wind-speed profile). It will be demonstrated why the roughness length appears to increase when snowdrifting occurs. Finally, we present a parameterization of the effects of snowdrifting on atmospheric stability which can be used in data analyses as a first-order approximation.

The influence of the wind speed profile on wind turbine performance measurements

Wind Energy ◽  
2009 ◽  
Vol 12 (4) ◽  
pp. 348-362 ◽  
Author(s):  
Rozenn Wagner ◽  
Ioannis Antoniou ◽  
Søren M. Pedersen ◽  
Michael S. Courtney ◽  
Hans E. Jørgensen
Keyword(s):  
Wind Speed ◽  
Wind Turbine ◽  
Speed Profile ◽  
Performance Measurements ◽  
Wind Speed Profile ◽  
Turbine Performance

The Influence of Thermal Effects on the Wind Speed Profile of the Coastal Marine Boundary Layer

2004 ◽  
Vol 112 (3) ◽  
pp. 587-617 ◽  
Author(s):  
Bernhard Lange ◽  
Søren Larsen ◽  
Jørgen Højstrup ◽  
Rebecca Barthelmie
Keyword(s):  
Boundary Layer ◽  
Wind Speed ◽  
Thermal Effects ◽  
Marine Boundary Layer ◽  
Speed Profile ◽  
Wind Speed Profile ◽  
Coastal Marine

scholarly journals An analysis-forecast system for uncertainty modeling of wind speed: A case study of large-scale wind farms

2018 ◽  
Vol 211 ◽  
pp. 492-512 ◽  
Author(s):  
Jianzhou Wang ◽  
Tong Niu ◽  
Haiyan Lu ◽  
Zhenhai Guo ◽  
Wendong Yang ◽  
...  
Keyword(s):  
Wind Speed ◽  
Large Scale ◽  
Uncertainty Modeling ◽  
Wind Farms ◽  
Forecast System
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