Advantages of using the ANSI/ASHRAE tracer gas test method vs. the ANSI/AIHA. Z face velocity test method for the. expressed in feet per minute (fpm) or meter per second (m/s) (ANSI/ASHRAE necessarily involving the use of a bench or a table (ANSI/ASHRAE , ). SEFA (Scientific Equipment Furniture. Association), formerly SAMA (Scientific. Apparatus Manufacturer Association). (recommended practices). ▫ ASHRAE .
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A considerable amount of sulfur hexafluoride is applied to evaluate the performance of each laboratory hood according to ASHRAE— method.
SF 6 is extremely hostile to environment and expensive.
In present work, the possibility of conducting this method of hood performance test with less volume of SF 6 was investigated. The performance of a laboratory hood was evaluated using ASHRAE standard method at three different ventilation capacity as well as three different volumetric flow rates of injected SF 6 while a mannequin was located at the front of hood.
Face velocity was measured times using a thermal anemometer TA-2 model. Air flow was visualized through injecting low and high volume of smokes at 18 tests.
Interpretations For Standard 110-1995
The occupational exposure of a hypothetic hood operator was determined 27 asnrae through direct reading. The average and standard deviation of face velocity at hood inlet were 0.
The application of ASHRAE hood performance test with smaller volume of tracer sulfur hexafluoride gas is not recommended. Evaluation of laoratory hoods in Tehran Water 110-9 Waste water Co. Islamic Azad university; Tracer performance testing of installed fume hoods: Chemical Health and Safety.
A new method for quantitative, in-use testing of laboratory fume hoods. Massachusetts Institute of Technology.
Ashrae Std Testing Laboratory Fume Hoods
Choosing less environmentally damaging gases for fume hood tracer gas testing. Alternative gases to meet. Shahid Beheshti University of Medical Science; Dale T, Maupins K. Application of non-dispersive infrared NDIR spectroscopy to the measurement of atmospheric trace gases.
Industrial Ventilation a manual of practice for designe 27th ed. Tracer gas evaluations of push-pull ventilation system performance. Laboratory fume hood performance.
Taylor S, Initiative TC.