Performance Assessment of Personal Respirable Cyclone Samplers Saulius Trakumas and Peter Hall SKC Inc., Eighty Four, Pennsylvania

Objectives: Evaluate the performance of commercially available personal respirable cyclones Compare collection efficiency of samplers tested to the respirable convention defined by International Organization for Standardization (ISO)

Cyclones Tested BGI-4CP BGI, Inc. Aluminum SKC ®, Inc. SIMPED Casella, Ltd. Dorr-Oliver Sensidyne ®, Inc. GS-1 SKC ®, Inc. GS-3 SKC ®, Inc.

Experimental Setup Test aerosol used: DOP Glass Spheres Coal Mine Dust

Experimental Setup C Down C Up

APS 3320 Related Issues: APS response depends on particle density and shape Small particles may recirculate through APS sensing volume leading to erroneous large particle counts

APS was calibrated periodically using PSL particles of known size Effect of particle density and shape on APS response was assessed by measuring efficiency of impactor To minimize erroneous counts and coincidence effect, small test particles were removed before entering test chamber using a virtual impactor and test particle concentration inside the chamber was kept below 100 cm -3

Impactor Sampling Efficiency d 50 =2.95  m (DOP) d 50 =2.89  m (Glass) d 50 =2.71  m (Coal Dust)

Impactor Sampling Efficiency d 50 =2.95  m (DOP) d 50 =2.89  m (Glass) d 50 =2.82  m (Coal Mine Dust)

Cyclone Sampling Efficiency d 50 =4.30  m (DOP) d 50 =4.15  m (Glass) d 50 =3.89  m (Coal Mine Dust)

Cyclone Sampling Efficiency d 50 =4.30  m (DOP) d 50 =4.15  m (Glass) d 50 =4.06  m (Coal Mine Dust)

Sampling Efficiency of Six Cyclones Tested Aluminum Dorr-Oliver GS-1 GS-3 BGI-4CPSIMPED

50% Cut-Size, d 50 [  m], Measured for Six Cyclones Using Three Different Test Aerosol DOPGlass SpheresCoal Mine Dust Dorr-Oliver GS GS Aluminum BGI-4CP SIMPED

Coal Mine Dust

Ratio of Dust Mass Collected Using Different Respirable Cyclone Samplers to the Respirable Dust Calculated for Coal Mine Dust

Sampling Efficiency of Aluminum Cyclone at Different Sampling Flow Rates

Ratio of Dust Mass Collected Using Aluminum Cyclone at Different Sampling Flow Rates to the Respirable Dust Calculated for Mine and Hypothetical Dusts

Conclusions Six personal cyclone samplers were tested using three different types test particles All samplers tested follow the respirable curve defined by ISO only approximately Difference between respirable dust mass and actual dust mass collected using a cyclone depends on dust type and size distribution