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.
BT - Indoor Air 2002, June 30 - July 5, 2002 C2 - LBNL-49939 CY - Monterey, California LA - eng N2 -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.
PP - Monterey, California PY - 2002 SP - 1060 EP - 1065 T2 - Indoor Air 2002, June 30 - July 5, 2002 T3 - Indoor Air 2002, June 30 - July 5, 2002 TI - Ventilation Efficiencies of a Desk-Edge-Mounted Task Ventilation System ER -