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Real-Time Diesel Particulate Measurement Using A Tapered Element Oscillating Microbalance
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English
Abstract
A Tapered Element Oscillating Micro-balance (TEOM), consisting of a tapered tube fixed at the wide end with a filter element attached to the narrow end which is free to oscillate, can monitor diesel exhaust particulate by drawing a sample through the filter element. As particulate mass accumulates on the filter, a small change in the frequency of oscillation, directly related to mass, is detected in real-time. As described in this study TEOM sensitivity on the order of 5×10−8 g-sec−1 may be achieved over sample periods of 8-15 seconds. Two light duty diesel vehicles were tested using FTP-Bag III and NYCC driving schedules. For 29 vehicle tests, the mean ratio of total TEOM mass to simultaneously collected 47 mm filter samples was 0.96 (C.V. = 13%). Real-time TEOM data should prove valuable to particulate control technology efforts and environmental impact assessment.
Authors
- R. Whitby - New York State Dept. of Environmental Conservation, Albany, NY
- R. Gibbs - New York State Dept. of Environmental Conservation, Albany, NY
- R. Johnson - New York State Dept. of Environmental Conservation, Albany, NY
- B. Hill - New York State Dept. of Environmental Conservation, Albany, NY
- S. Shimpi - Cummins Engine Co., Columbus, IN
- R. Jorgenson - Cummins Engine Co., Columbus, IN
Citation
Whitby, R., Gibbs, R., Johnson, R., Hill, B. et al., "Real-Time Diesel Particulate Measurement Using A Tapered Element Oscillating Microbalance," SAE Technical Paper 820463, 1982, https://doi.org/10.4271/820463.Also In
References
- Japar S. Szkarlat, A. “Real-Time Measurements of Diesel Vehicle Exhaust Particulate Using Photoacoustic Spectroscopy and Total Light Exticntion” SAE Paper 811184 1981
- Patashnick H. Rupprecht, G. “The Tapered Element Oscillating Microbalance, A Monitor for Short-Term Measurement of Fine Aerosol Mass Concentration” EPA Report EPA-600/2-81-146 1981
- Wang, J. C. Patashnick, H. Rupprecht, G. “A New Real-Time Isokinetic Dust Mass Monitoring System” Journal of the APCA 30 9 1980
- Gibbs, R. Hyde, J. Byer, S. “Characterization of Particulate Emissions from In-Use Diesel Vehicles” SAE Paper 801372 1980