Characterization of a thermal aerosol generator for HVAC filtration experiments (RP-1734)

Using Building Energy and Smart Thermostat Data to Evaluate Indoor Ultrafine Particle Source and Loss Processes in a Net-Zero Energy House

“…Particle number size distributions from D em = 150 to 300 nm were estimated through spline interpolation due to operational limitations of the SMPS. − The SMPS and OPS were located on floor 1 between the kitchen and the living room, with sample inlets 1.5 m above the floor. Measured particle number size distributions were translated to surface area (μm 2 cm –3 ) and volume (μm 3 cm –3 ) size distributions assuming spherical particles (dynamic shape factor: χ = 1) and mass size distributions (μg m –3 ) using measured size-resolved effective densities (ρ eff ) for indoor particles in the ReNEWW House (Figure S5), following the work of Wu and Boor (2020) . Particle size distributions were then fit to multimodal log-normal distribution functions. , Following completion of the one month measurement campaign, outdoor particle number size distributions were measured for 1 week with the SMPS, OPS, and a silica gel diffusion dryer (Model 3062, TSI Inc.).…”

Ethanol-based disinfectant sprays drive rapid changes in the chemical composition of indoor air in residential buildings

“…S2). Measured particle number size distributions (dN/dLog(D a ), cm -3 ) were translated to particle mass size distributions (dM/dLog(D a ), μg m -3 ) assuming spherical particles with a density of 1 g cm -3 for D a ≤100 nm ( Wu and Boor, 2020 ) and the density of the disinfectant solution for particles with D a >100 nm, which were likely generated by the spray process (Table S1). The particle number size distributions were used to estimate number respiratory tract deposited doses, as described in the supplementary material.…”

High time‐resolution measurements of ultrafine and fine woodsmoke aerosol number and surface area concentrations in biomass burning kitchens: A case study in Western Kenya

“…The four diffusion chargers used during the field campaign were calibrated against a water‐based CPC (wCPC, Model 3788, TSI Inc.) using electrical mobility‐classified NaCl and KCl particles (25, 50, 100, 200, and 300 nm) produced by a thermal aerosol generator 71 . The electrical mobility diameter range of the NaCl and KCl particles represents typical modal diameters of woodsmoke aerosol produced by biomass burning stoves (Figure 1).…”

“…The four diffusion chargers used during the field campaign were calibrated against a water-based CPC (wCPC, Model 3788, TSI Inc.) using electrical mobility-classified NaCl and KCl particles (25,50,100,200, and 300 nm) produced by a thermal aerosol generator. 71 The electrical mobility diameter range of the NaCl and KCl particles represents typical modal diameters of woodsmoke aerosol produced by biomass burning stoves (Figure 1). PN and PSA concentrations of the NaCl and KCl particles spanned from 10 1 to 10 6 /cm 3 and 10 0 to Both laboratory and field co-location measurements of the four diffusion chargers and four CO sensors were routinely completed during the field campaign (Figure S2).…”