airflow testing Articles

  • Computational modelling of airflow in urban street canyon and comparison with measurements

    The main goal of this study was to predict the airflow in a street canyon surrounded by an urban area using CFD modelling. In the street geometry described in the main part, the actual airflow directly influences air infiltration into buildings. Different models of turbulence were tested as well as specific wind boundary conditions. A correct assignment of boundary conditions (i.e., mainly wind ...


    By Inderscience Publishers

  • Physical Modeling of Airflow Dynamics in the Brightwater Treatment Plant Effluent Drop Structure

    King County, Washington’s 54 MGD Brightwater Regional Wastewater Conveyance System and Treatment Plant is currently in final design. The effluent from the plant will enter a 7-foot diameter pipe through the effluent drop structure, which will be located on the grounds of the proposed treatment plant. Effluent will be discharged to Puget Sound.The design team has committed to designing a ...

  • Partial Flow Sampling System For Transient Engine Testing

    For on-highway engine manufacturers, meeting model year 2007 emissions levels represents a major measurement challenge. However, future off-road engine emissions testing requirements are anticipated to include not only lower steady-state emissions levels, but also the possibility of using transient cycle data. As a result, engine manufacturers are seeking more cost-effective methods of ...


    By Sierra Instruments, Inc.

  • Proposed Standard Test Method for Measurement of Pneumatic Permeability of Partially Saturated Porous Materials by Flowing Air

    This proposed standard describes a laboratory test method for the measurement of the coefficient of permeability for airflow (pneumatic permeability) through porous media (e.g., soils) partially saturated with water. Control and measurement of the airflow is effected at the inlet of the specimen. The permeameter cell is fitted with dual transfer lines that isolate the specimen pressure drop from ...


    By ASTM International

  • Southwest Research Institute® (SwRI®) Technical Report Summary; SwRI Project No. 08.16032.009, “Filter Cleanability Testing”

    This Technical Report Summary presents an overview of laboratory testing conducted at SwRI to evaluate the performance of a Diversi-Tech Green Filter Cleaning Machine under controlled laboratory conditions. In particular, the objective was to measure if and by how much, if any, airflow resistance, efficiency, and dust capacity changed for a given number of dust loading/filter cleaning cycles, ...


    By Diversitech

  • Blower Door Pressure Testing, Unvented Attics and Florida Homes

    I recently traveled to theCaribbean on a building science investigation. A large multi-national corporation owns several homes there for local executives. These homes had been plagued with dampness and mold growth problems for several years.  After several attempts to correct these problems, IET was called in, as we had ...

  • Green Filter Cleaning Machine case study

    This Technical Report Summary presents an overview of laboratory testing conducted at SwRI to evaluate the performance of a Diversi-Tech Green Filter Cleaning Machine under controlled laboratory conditions. In particular, the objective was to measure if and by how much, if any, airflow resistance, efficiency, and dust capacity changed for a given number of dust loading/filter cleaning cycles, ...


    By Diversitech

  • Laboratory test system to measure microbial respiration rate

    This study reports a sensible, accurate and economic method for continuous measuring microbial respiration. The measuring principle is an open system, with a continuous air-flow through. Evolved CO2 is absorbed and precipitated as carbonate by a Ba(OH)2 solution, causing a stoichiometrical decrease in ionic strength of the solution and in electrical conductivity. ...


    By Inderscience Publishers

  • Case study - World`s largest remediation site

    Overview Hong Kong's Kai Tak Airport, the world's busiest airport in 1997, became the world's largest remediation site once it was closed. When the airport was decommissioned in 1999 in favor of the new Chek Lap Kok Airport, the government planned to rapidly clean up the site for commercial and residential development. After many years of soil penetration by various ...

  • Clearing the air on “free Air CFM” - Specs for portable duct cleaning vacuums

    Many times when researching equipment for duct cleaning vacuums you will find manufacturers posting the CFM suction ratings on their vacuums as “Free Air” or “bench Test”. The Free air test is the rating on the impeller wheel of the vacuum, simply put it is the maximum amount of airflow the impeller can produce with out any restriction. It seems as though many ...


    By Hypervac Technologies

  • Evaluation of a Horizontal Well

    Background: Air Sparging Air sparging is an in-situ remediation technology where air is injected into the saturated zone of an aquifer. It is an alternative to conventional ex-situ pump and treat systems for remediation of contaminated ground water. It is necessary to understand the pattern of air flow that will occur in the subsurface in order to determine the optimal placement, ...

  • Detachment of Solids and Nitrifiers in IFAS Systems

    ABSTRACT Integrated Fixed Film Activated Sludge (IFAS®) systems utilize polyethylene biofilm carriers to achieve nitrification in municipal wastewater treatment plants (WWTPs). The movement of solids to and from the biofilm carrier has the potential to impact the biofilm thickness, the retention time of the micro-organisms and hence the nitrification capacity of the biofilm. Despite the ...

  • Central Kitsap (USA) Municipal WWTP - Case Study

    Number of Tanks: 4 Total Volume: 13,080 m³ Water Depth: 4.75 m SOTR Standard Oxygen Transfer Rate: 1,240 kgO2/h Total Airflow: 10,800 Nm3/h Total AEROSTRIP® Diffusers: 1,214 The Central Kitsap facility started operations in 1979 as a conventional activated sludge ...


    By Aquaconsult Anlagenbau GmbH

  • White Paper - Uniqair, Purdue University Odor Lab Develop Odor Sampling Procedure

    New Odor Sampling Procedure for high humidity air flow from dryers/coolers A new odor sampling procedure with nitrogen dilution has been developed by Uniqair and Purdue University’s odor lab for odor evaluation of high humidity airflow from petfood dryers, extruder air conveyer (wet cyclones) and coolers.  The sample bags will be pre-filled with a specific quantity of ...


    By Uniqair Technologies Ltd.

  • TopAir`s Laminar Bench

    TopAir is the flagship brand of Statitech Ltd., a leading manufacturer of cleanroom products since 1999. One of TopAir’s premier product lines includes the laminar bench. The laminar bench is a combination stainless steel worktop that provides a smooth, clean surface and an overhead airflow/filter system that removes unacceptable particles from the air before they reach the work area. ...


    By TopAir Systems

  • Sölden (Austria) Municipal WWTP - Case Study

    Number of tanks: 4 Total Volume: 8,448 m³ Water Depth: 8.0 m SOTR Standard Oxygen Transfer Rate: 2,800 kgO2/h Total Airflow: 20,640 Nm3/h No. of AEROSTRIP® Diffusers: 880 Sölden, one of the famous ski resorts in the world, is situated in the Austrian Alps. A ...


    By Aquaconsult Anlagenbau GmbH

  • TopAir’s Clean bench

    The clean bench is a mainstay of TopAir’s superior line of cleanroom equipment for all requirements of the biomedical, electronic, semi-conductor and defense industries. TopAir is the flagship brand of Statitech Ltd., a leading provider of cleanroom furniture and accessories since 1999. Besides the clean bench, TopAir’s premium line includes fume hoods, desiccators, weighing stations ...


    By TopAir Systems

  • Emissions measurement - Discover a new way of particulate emissions measurement for light-duty vehicles

    New article from Sierra in Automotive Testing International Magazine entitled "Emissions Measuremen" explores how combining partial flow sampling and direct exhaust flow measurement provides an ideal solution for particulate emissions measurement from light-duty vehicles. With the phase-in of LEV-3 this year targeting a 3mg/mile PM limit, followed by a 1mg/ mile PM limit phasing-in by 2025, ...


    By Sierra Instruments, Inc.

  • CDS-5: A Mayo Clinic and Thermotron Collaboration case study

    Cytogenetic testing is used for the diagnosis of many genetic disorders including congenital (prenatal and adult) and hematologic/oncologic disorders. Processing of these tests used to be labor-intensive with unpredictable test data. That’s why the Cytogenetic Laboratory at Mayo Clinic and Thermotron joined forces to increase the efficiency of cytogenetic test processing with the invention ...


    By Thermotron Industries

  • Klargester Cesspools provide a reliable, economic and efficient solution to your sewage disposal needs

    Klargester Cesspool provides a reliable solution for locations without mains drainage, where the discharge of treated effluent is not permissible due to unsuitable ground conditions, or where infrequent or seasonal use, such as a holiday home, would prevent the successful functioning of a BioDisc/AirFlow packaged treatment plant, for example. Quality and reliability at a competitive ...


    By Kingspan Water & Energy

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