air flow monitoring Articles
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Lessons learnt from evaluating full-scale ammonium feedback control in three large wastewater treatment plants
Three large wastewater treatment plants in Sweden participate in a project evaluating different types of ammonium feedback controllers in full-scale operation. The goal is to improve process monitoring, maintain effluent water quality and save energy. The paper presents the outcome of the long-term evaluation of controllers. Based on the experiences gained from the full-scale implementations, a ...
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Flow-induced errors in airborne in situ measurements of aerosols and clouds
Abstract. Aerosols and clouds affect atmospheric radiative processes and climate in many complex ways and still pose the largest uncertainty in current estimates of the Earth’s changing energy budget. Airborne in situ sensors such as the Cloud, Aerosol, and Precipitation Spectrometer (CAPS) or other optical spectrometers and optical array probes provide detailed information about the ...
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Monitoring Considerations for Critical Environment Cleanrooms
Facilities grappling with USP797 and USP800 verify their compliance through cleanroom certification. Airflow measurements, leakage testing and environment measurements (differential pressure, temperate and relative humidity) are documented and certified. Non-cGMP certified facilities, do not generally have ongoing monitoring of their cleanroom space and have difficulties identifying when ...
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What Is The Importance Of Fume Hood Face Velocity?
The speed at which air is drawn into a fume hood is of great importance for the safe and effective operation of a fume hood. A speed that is too high or too low can compromise the performance of the fume hood, leaving those near the hood in danger. So why does this airspeed matter? What is so significant about the face velocity measurement of a fume hood? What is a Fume Hood Face? If we are going ...
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