wind speed and direction Articles
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ADMS 5 Buildings & Complex Terrain Validation Baldwin Power Plant
1 Introduction The Baldwin Power Plant1 (Hanna and Chang [3]) was located in a rural, flat terrain setting of southwestern Illinois, USA, and had three identical 184-m stacks aligned approximately north-south with a horizontal spacing of about 100 ni. There were 10 SO2 monitors that surrounded the facility, ranging in distance from 2 to 10 km. On-site meteorological data were available during ...
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Introduction to ultrasonic wind speed and direction sensors
Introduction of Works: Ultrasonic wind speed and direction sensors are devices used to measure wind speed and direction in a variety of applications, from weather forecasting to wind power generation. Unlike conventional wind sensors, which rely on moving mechanical parts, ultrasonic sensors use sound waves to detect wind speed and direction. This makes them more accurate, reliable and durable ...
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Working principle and advantages of ultrasonic wind speed and direction sensor
background Ultrasonic wind speed and direction sensor. It is a wind direction measuring instrument developed based on the principle of ultrasound. Use the transmitted sound pulses. Measure the time or frequency difference at the receiving end to calculate the wind speed and direction. It is widely used in the measurement of wind direction and speed in greenhouses, environmental protection, ...
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Taking wind into account in the design of waste stabilisation ponds
Up to now, most investigations on the dependency of the fluid flow patterns and performance of waste stabilisation ponds (WSPs) on wind speed and direction and pond layout have been performed using 2D and 3D CFD steady state isothermal models. 3D non steady state models integrating thermal processes and boundary conditions taking into account the full influence of meteorological factors are ...
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Avoid a challenge to your air permit - choose the right off-site meteorological data, presented at EUEC 2010
Modeling Requires Many Inputs To set the stage, you need: Elevation data Fence lines Receptor grids Building locations Building dimensions Stack coordinates Stack heights Stack diameters Exit temperatures Exit velocities Volume source parameters Area source parameters Emission rates But to get it all moving (transporting/dispersing the emissions from a single point), you ...
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Characterising uncertainty in plume dispersion models
For management decisions related to effects of releases of toxic chemicals, it is useful to consider not only the expected or most likely impact of the release, but also the envelope of possible outcomes, the latter of which involves an assessment of the uncertainty in the modelling results. In this paper, we provide quantitative estimates of major sources of uncertainty in plume dispersion ...
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Dyacon wind sensor: Now detecting wind GUST!
While sustained winds are of interest, it is the wind gusts that generally cause damage . . . at least for those outside of tornado alley or on hurricane coast. How do you measure a gust? With a Dyacon wind sensor, of course. The latest firmware for Dyacon WSD‑1 now gives users more measurement parameters than other wind sensors on the market. Current wind speed Current wind ...
By Dyacon, Inc.
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Statistical analysis of prognostic mesoscale flow model results in the frame of APSIS
Taking into account available observations, results of several mesoscale flow models applied to definite scenarios in the framework of the Athenian Photosmog Simulation Intercomparison Study (APSIS) are subjected to a statistical analysis as an attempt at model evaluation. The procedure is applied to the wind speed, the wind direction and the air temperature. For a comprehensive presentation, ...
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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 ...
By OTT HydroMet
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A control model for the mouth of the River Murray, South Australia
The River Murray drains one-seventh of the Australian continent, but in 1991 the mouth closed for three months. The last 1000 km of the river system is controlled by weirs and barrages, and consequently it is feasible to use river flow to control the size of the river mouth. This paper demonstrates how recursive estimation techniques have been applied to the historical time series of monthly ...
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EK’s Weather & Droplet Control
Evaporation King now offers Weather and Droplet Control (WDC) using live weather data. The PLC/HMI interface gives the operator site-specific automatic controls of the Gladiator accelerated evaporation atomizer speeds. The WDC uses wind speed, wind direction, humidity, and temperature to control any possible drift under varying weather conditions (Figure 1). The WDC offers remote access and ...
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The origin and type of wind speed sensor
backgroundAn anemometer is an instrument used to measure wind speed and direction. It is a critical tool for meteorologists, engineers, and researchers who need to gather information about atmospheric conditions. Anemometers come in various types, but they all work based on the same principle of detecting the wind's pressure and translating it into a measurable quantity. In this article, we will ...
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JSC Alyuminiy Kazakhstan in Pawlodar uses WS600 to monitor air quality - Case Study
JSC "Aluminum of Kazakhstan" is a company producing aluminum. The production site is located outside the city of Pavlodar. Despite the distance between the city center and the production site, exhaust fumes sometimes reach the city and cause residents to complain about smelly or even harmful gases in the air. For this reason, the company has now invested in an air quality measuring station in ...
By OTT HydroMet
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Numerical experiments to determine MM5/WRF–CMAQ sensitivity to various PBL and land–surface schemes in north–eastern Spain: application to a case study in summer 2009
The Community Multiscale Air Quality (CMAQ) model was used along with the Weather Research and Forecasting (WRF) model to study air quality modelling sensitivity to various Planetary Boundary Layer (PBL) schemes and Land Surface Models (LSMs). The performance is assessed and quantified by comparing results with surface observations and the outputs provided by the fifth generation Mesoscale Model ...
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Modelling meteorological conditions for the episode (December 2009) of measured high PM10 air concentrations in SW Poland - application of the WRF model
The weather research and forecasting model has been applied to derive information on meteorological variables for the period with high concentrations of PM10 (1–30 December 2009) in SW Poland. Three one–way nested domains have been used and the results for the innermost domain have been compared with surface and radiosonde meteorological measurements for pressure (PRES), air temperature (TMP), ...
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Gill Instruments case study featured in AWE International
AWE International magazine, which is focused on the environmental analysis industry, recently featured Gill Instruments in a case study about environmental monitoring with solid-state meteorological instruments. The case study includes information about all of the products within the Gill Instruments range, with information about their advantages within the environmental analysis field. We have ...
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Intrinsically safe ultrasonic wind sensor
The Gill Instruments Intrinsically Safe WindObserver™ is an ultrasonic wind sensor, developed specifically for use in hazardous areas and in particular for offshore applications. The sensor has no moving parts, utilising Gill Instruments’ advanced ultrasonic measurement technology to accurately monitor wind speed and direction. Approved to EEx ia IIC T5, this ultrasonic wind sensor is a ...
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Finding risky areas for oil spillage after tanker accidents at Istanbul strait
The Istanbul strait, which is a part of Turkish Strait System (TSS), is a narrow and navigationally risky waterway for ships. This risk increases daily due to oil transportation from Central Asia and Russia. In this study, four high risk areas were identified after analysing accident statistics for the strait. Then, a simulation was run for 1,000 tonnes of oil spill at each station and the ...
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Meteorological data from numerical weather prediction or observations for dispersion modelling
Synoptic observations of wind speed, direction, cloud cover, precipitation and temperature are inputs to regulatory dispersion modelling. Numerical Weather Prediction (NWP) data generated by national meteorological services are easily formatted for dispersion models. Changing from observations to NWP data raises concerns amongst regulators and model users – how might impact assessments differ if ...
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What do you know about wind speed and direction sensors?
Background: Wind speed and direction are two of the many variables that meteorologists track when observing the weather. Wind speed and direction can provide important clues about the weather and can even play a role in predicting future conditions. For example, in the Northern Hemisphere, southerly winds usually bring warmer air, while northerly winds usually bring cooler air. In the eastern ...
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