Fig 1.
Experimental chamber setup.
Table 1.
Location of anemometer sensors for the ACS for three tested ventilation settings.
Fig 2.
Experimental setup of the TLA device.
Fig 3.
Results from 3D air velocity measurements at 8 cm above the nose tip.
The results are presented in terms of orthogonal air velocity components (Ux, Uy, Uz) and the airflow.
Table 2.
Results from airflow characteristics study for tested ventilation settings A, B and C.
Table 3.
Airflow characteristics in the cleaned and cooled air zone created by TLA device.
Fig 4.
The airflow velocity vectors determined under the TLA cooled air supply nozzle.
Displayed are measured positions: 23 cm above the nose tip (X = 0, Y = 0, Z = 0.23m), 8 cm above the nose tip (X = 0, Y = 0, Z = 0.08m), right and left side of the face (X = 0, Y = ±0.2, Z = 0.08) and (X = 0, Y = ±0.3, Z = 0.08m).
Fig 5.
Time series variation of concentrations of two particle size fractions in the breathing zone with three different treatments applied.
A) without air cleaner, B) with room air cleaner and C) with TLA device. (Fraction 1 includes the particles between 0.3 and 0.5 μm. Fraction 2 includes the particles larger than 0.5 μm.)
Fig 6.
Overall particle distribution over the entire measurement period with periodic movements.
Measuring interval: 23 s, i.e. 479 measurements for each particle size bin interval.
Table 4.
Effectiveness of room air cleaner and TLA air cleaner.
Fig 7.
Variations of particle concentrations in the breathing zone when air cleaner (setting B) and TLA device (setting C) was used and duvet was lifted periodically.