anemometers Articles

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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. ...

Minimizing flow distortion errors in a sonic anemometer

by Applied Technologies, Inc. (ATI)  (Mar. 20, 1990)

This paper describes a simple approach to minimizing probe-induced flow distortion errors in a three-axis sonic anemometer. By separating the three axes, mutual interference between the transducers and supports in the three arrays is reduced. Only a transducer shadow correction determined from wind tunnel tests is needed to obtain measurements ...

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. ...

Sonic Thermometry

by Applied Technologies, Inc. (ATI)  (Sep. 1, 2012)

Sonic anemometers have had extensive use in the scientific community. These instruments are used to measure atmospheric parameters that most rotating instruments cannot. Wind speed and wind direction or individual axes of wind velocity are most commonly measured. Along with these measurements, another parameter can be extracted from the sonic ...

Canarina DISPER software · anaerobic digestion · commands 28

by Canarina Environmental Software  (Dec. 14, 2011)

The necessary data in the Meteorology command is:   Pasquill stability): Classification scheme that describes the degree of atmospheric turbulence. Categories range from extremely unstable (A=1) to extremely stable (F=6). Unstable conditions ...

Estimates of lateral dispersion parameters in low wind speed conditions

by Inderscience Publishers  (Dec. 28, 2012)

Wind speed time series recorded during stable low wind speed conditions are typically non–stationary, with large horizontal oscillations, commonly known as meandering. In this paper, two wavelet–based methods are proposed to obtain lateral dispersion coefficients from such time series. These methods, associated with a specific wind model, have ...

Do you need to measure air flow?

by ATP Instrumentation Ltd  (Sep. 19, 2012)

Look no further. This hot wire thermo-anemometer is ideal for low air velocity, volume, and temperature measurement. If your desired application involves ventilation surveying, the maintenance of air conditioning systems, or environmental monitoring, this product will meet your requirements and more. Record your measurements on a slim plug-in ...

A simple methodology for surface layer characterization during diabatic extremes

by Applied Technologies, Inc. (ATI)  (Mar. 8, 2013)

Increased global environmental awareness has fostered widespread use of remote automated weather station (RAWS) networks to monitor meteorological conditions, and reliance on atmospheric dispersion modeling for decisions concerning pollutant dispersion. Dispersion models require as input a characterization of surface layer (SL) heat and momentum ...

On the wind flow patterns under neutral and unstable conditions in an urban area

by Inderscience Publishers  (Jun. 18, 2012)

Wind flow and pollutant dispersion within urban areas depend on the approaching flow profile and temperature stratification. Thus, the flow field developed under neutral and unstable stratification conditions, within a street–canyon, was studied experimentally and numerically for a two–dimensional urban background set–up. Wind–tunnel measurements ...

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