Ventilation Efficiencies of a Desk-Edge-Mounted Task Ventilation System

TitleVentilation Efficiencies of a Desk-Edge-Mounted Task Ventilation System
Publication TypeConference Paper
Year of Publication2002
AuthorsDavid Faulkner, William J Fisk, Douglas P Sullivan, Seung-Min Lee
Conference NameIndoor Air 2002, June 30 - July 5, 2002
Conference LocationMonterey, California
KeywordsImproved IAQ practices and technologies, offices, perceived air quality, Ventilation rates and strategies

In chamber experiments, we investigated the effectiveness of a task ventilation system with an air supply nozzle located underneath the front edge of a desk and directing air toward a heated mannequin seated at the desk. The task ventilation system provided outside air, while another ventilation system provided additional space cooling but no outside air. Test variables included the vertical angle of air supply (-15° to 45° from horizontal), and the supply flow rate of (3.5 to 6.5 L s-1). Using the tracer gas step-up and step- down procedures, the measured air change effectiveness (i.e., exhaust air age divided by age of air at the mannequin's face) ranged from 1.4 to 2.7, which is higher than typically reported for commercially available task ventilation or displacement ventilation systems.

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