anemometers Articles

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Weather Data for Noise Monitoring

by Columbia Weather Systems, Inc.  (May 12, 2015)

“Weather conditions are the single largest variable factor in how sound travels over large distances,” says Steve Bilawchuk principal partner and engineer at ACI Acoustical Consultants Inc. “Wind speed and wind direction are of crucial importance.” ACI is an acoustical engineering consulting company based in Alberta, ...

Weather claims and wind safety

by Windcrane - designed and manufactured by Logic Energy  (Apr. 24, 2015)

Anybody working in the construction industry either here in the UK or anywhere else in the world is likely to know that the weather can present us with particular hazards. While rain, ice and snow are particularly dangerous to work in, we must always be aware that the wind is also likely to make conditions unsafe, particularly for those who work ...

Case Study Port of Hamburg/Germany

by General Acoustics e.K.  (May 25, 2015)

LOG_aLevel Storm Tide Network at the Port of Hamburg, Germany Since 2003 a Storm Tide Network from General Acoustics GmbH (GA) has been satisfactory operating at the Port of Hamburg. In a first test phase of two years a LOG_aLevel station was successfully tested by the Hamburg Port Authority (HPA) against its conventional gauges. Due to the good ...

Flow measurement technology comparison: GA5000 Vs Hot Wire Anemometer

by Geotech  (Jul. 22, 2014)

A typical landfill or contaminated land site under investigation will comprise of a suitable number of gas monitoring wells, with a planned series of monitoring visits.  The monitoring will include gas flow measurements, which together with methane and carbon dioxide concentrations will be used to calculate gas screening values (GSV) and ...

Why Does the Non-Orthogonal Sonic Anemometer Underestimate

by Applied Technologies, Inc. (ATI)  (May 16, 2014)

The performance of non-orthogonal sonic anemometers has been the subject of much discussion in recent years.  It followed findings that they underestimated vertical winds and vertical heat fluxes by 10-15%.  For agricultural and forestry scientists who depended on them for their large-scale energy balance studies this was a bad surprise. ...

A preliminary analysis of measurements from a near-field pollutants dispersion campaign in a stratified surface layer

by Inderscience Publishers  (Dec. 1, 2014)

In order to study pollutants dispersion in a stably stratified surface layer at small scales, a pollutants dispersion field experiment programme is being conducted on the site SIRTA in the southern suburb of Paris. In a preliminary campaign held during the winter of 2012 with continuous gas releases, we had 12 ultrasonic anemometers measuring ...

Dynamic validated model of a DFIG wind turbine

by Inderscience Publishers  (Oct. 24, 2014)

This paper presents the development and qualitative validation of a doubly-fed induction generator (DFIG) wind turbine model that is represented in terms of behaviour equations of each of the subsystems, mainly the turbine rotor, the drive train, the induction generator, the power converters and associated control systems and a protection system. ...

The C3—an alternative anemometer for resource assessment

by Second Wind  (Oct. 1, 2007)

Executive Summary. Second Wind Inc. is pleased to offer a new standard anemometer for resource assessment that incorporates industry proven geometry and features. The new three-cup anemometer, the Second Wind Model C3, is physically similar to a popular anemometer designed by Maximum, Inc. and used in the wind industry for more than 30 years. ...

Comparisons of models with data: effects of averaging time as indicated by sonic anemometer measurements

by Inderscience Publishers  (Sep. 17, 2009)

For continuous sources, plots of predicted against observed gas concentrations often display considerable scatter. These differences are apparent even when the averaging times for the models and data match. Possible sources of error in the observations are shifts in direction of the mean wind or disturbance by intermediate- and large-scale eddies. ...

Verification of wind energy related measurements with a SODAR system

by Atmospheric Systems Corporation (ASC)  (Sep. 14, 2013)

Abstract Complex terrain and growing wind energy converters (WEC) in wind parks generate increasing interest in determining wind profiles and turbulence besides the general forecast of annual energy production. Increasing hub heights and growing rotor diameters of advanced WEC make SODAR systems a valuable alternative to meteorological towers. ...

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