|Document ID (ISN)||64203|
|ISSN - Serial title
||0002-8894 - American Industrial Hygiene Association Journal
|Convention or series no.
||Measurement of outdoor and recirculated air percentages by carbon dioxide tracer
||June 1994, Vol.55, No.6, p.525-528. Illus. 4 ref.
||This article presents a technique to extend the utility of carbon dioxide dataloggers in the provision of information on the percentages of both outside air and recirculated air in a ventilated compartment. An electronic timed sampling valve is used to alternately collect air from the room supply and from the recirculated airstream. The timed valve provides a dataset for each location that can be used to calculate the percentages of outside and recirculated air. The technique uses ambient carbon dioxide as a natural tracer gas. The carbon dioxide tracer technique can be used when the psychrometric temperature method for calculating outside air percentage is indeterminate because the return air and outdoor air temperatures are equal.
||ventilation; microclimate; evaluation of technique; ventilation systems
||description of technique
||D - Periodical articles
|Country / State or Province||USA|
||Heating, ventilation and climate
|Broad subject area(s)