Mining Publication: Apparatus for Measuring Diesel Tailpipe Emissions in Underground Mines
Original creation date: April 1992
The U.S. Bureau of Mines and Michigan Technological University (MTU) are collaborating to develop an apparatus for measuring diesel tailpipe emissions in underground mines. A tailpipe Emissions Measurement Apparatus (EMA) is described that dilutes diesel exhaust and measures the concentrations of diesel particulate matter (DMP), CO, CO2, NO, and NO2 at known dilution ratios. The EMA was evaluated by side-by-side comparison of its measurements with those by laboratory-grade instruments. Concentrations of CO and CO2 measured by the EMA were usually within +/-14 pct of concentrations measured by laboratory-grade instruments for CO and +/-20 pct for CO2. EMA-measured DPM concentrations were, on average, 29 pct lower than those measured by laboratory-grade instruments, with the differences being fairly consistent. The CO and CO2 differences are related to the method of calculating the EMA's dilution ratio, and the difference in DPM concentrations is attributed to thermophoretic and/or condensation losses related to the EMA's unheated sample probe. Preliminary analysis of data obtained with a heated sampling probe and modifications in the sampling procedures have indicated reduced variability in dpm and in the calculated dilution ratios.
Authors: DH Carlson, TR Taubert, JH Johnson
Report of Investigations - April 1992
NIOSHTIC2 Number: 10011417
Minneapolis, MN: U.S. Department of the Interior, Bureau of Mines, TN 431, 1994 Apr; :1-2
See Also
- Diesel Exhaust Aerosol, Review of Measurement Technology
- Differential Pressure as a Measure of Particulate Matter Emissions from Diesel Engines
- Instrumentation for Diesel Particulate Matter Emissions Research
- Performance Evaluation of Diesel Particulate Filter Technology in the Underground Environment
- Real-time Diesel Particulate Monitor for Underground Mines
- Real-Time DPM Ambient Monitoring in Underground Mines
- Role of Lubrication Oil in Particulate Emissions from a Hydrogen-Powered Internal Combustion Engine
- Sampling Results of the Improved SKC® Diesel Particulate Matter Cassette
- Size Distribution and Deposition in Human Respiratory Tract: Particle Mass and Number
- Technology News 431 - Apparatus for Sampling and Measuring Diesel Tailpipe Emissions
- Content source: National Institute for Occupational Safety and Health, Mining Program