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 that are virtually insensitive to probe orientation relative to the mean flow. Preliminary results from a series of three atmospheric tests verify the effectiveness of this correction.
- Applied Technologies, Inc. (ATI)
- Minimizing flow distortion errors in a sonic anemometer
Lufft weather sensors are used where others failed
The ski lift in Visperterminen Rothorli leads from the village through pinewoods to the 2300m high winter sports region. On August 15, 2018 a Lufft WS600 weather station was installed and put into operation. Its main task is to provide the lift staff and piste team with climate data in winter. The data helps with important decisions, such as whether the lift can be opened at all in strong winds and whether and how the slope preparation should take place. In summer, the data is used for hikers, cyclists and...
PV Monitoring System Offers Solution for Plant’s Solar Array
dataTaker DT85 Monitors Electrical and Environmental Parameters as a PV Monitoring System A customer inquired with CAS DataLoggers about a plant monitoring systems for a photovoltaic (PV) system. Their request was not only for a device to measure the current and voltage output of the solar array, but also for environmental monitoring of local conditions since the plant is in a location where extreme temperature excursions often occur. Parameters: The requirements for the project included not just the DC voltage...
New Developments in Thermal Dispersion Mass Flow Meters
IntroductionThis paper describes a newly developed microprocessor-based thermal dispersion mass flow meter that uses four temperature sensing elements in its flow sensor instead of the traditional two elements and automatically manages changes in gas selection, gas temperature, gas pressure, and outside temperature. This new mass flow meter is ideally suited for apportionment applications in natural gas distribution systems.ApplicationsThermal dispersion mass flow meters measure the mass flow rate of fluids,...
Ultrasonic wind sensor for smart wind turbine control - Polaris / USA - Case Study
The American wind turbine manufacturer Polaris trusts for their wind turbine applications anemometers from Lufft. Over 50 wind turbines have already been equipped with our ultrasonic anemometers Ventus-UMB and V200A-UMB. Crucial in these applications is a high degree of precision and a long, maintenance-free useful life. In addition, controlling of the turbine complex requires a high frequency of data to provide the most efficiency. Our Ventus-UMB and V200A-UMB anemometers perform all this.
Weather measurement in extreme conditions - Whistler Mountain - Case Study
Whistler Blackcomb mountain is a premiere winter resort in British Columbia Canada. Some months ago our subsidiary "LufftUSA" installed the first Ventus-UMB ultrasonic anemometer atop a main ski lift on the Whistler mountain. The first winter storm passed leaving the entire mountain and all mechanical equipment covered in snow and ice... except the Ventus-UMB. The Ventus-UMB continued to give accurate wind speed and wind direction data through the storm. Now there is a plan to install more Ventus-UMB sensors at...