Ultrafine particles control strategy in printer rooms: model and experiment study on portable air cleaner and HVAC combination
Paper i proceeding, 2009
Printers may show a substantial ultrafine particles (UFP) generation for short printing periods.
To evaluate efficient strategies for control of printer pollution, the present paper examines the
cleaning performance and economical benefit of a combination between portable electrostatic
air cleaners (AC) and ventilation. The study is based on both field experiments and experiments
in a test chamber. A particle number balance model was also built up. It shows that, with the
same sum of ventilation air flow rate (Qv) and AC clean air delivery rate (CADR), if no outdoor
pollution influence, the cleaning performance is constant. The measurements indicate that
although the particle exposure (e.g. average concentration) may be strongly reduced by adding
an air cleaner with sufficient CADR, the maximum (peak) concentration is not reduced to the
same extent. Considering the saving of ventilation operation cost the economical benefit of AC
and HVAC combination is clear.
Portable air cleaner