Particle number emissions from a large fleet of diesel and CNG buses
Jayaratne, Rohan, Morawska, Lidia, & Ristovski, Zoran (2006) Particle number emissions from a large fleet of diesel and CNG buses. In 10th ETH Conference on Combustion Generated Nanoparticles, 21-23 August 2006, ETH Zentrum, Zurich, Switzerland. (Unpublished)
Exhaust emissions were monitored in real-time at the kerb of a busy busway used by a mix of diesel and CNG-powered transport buses. Particle number concentration in the size range 3 nm to 3 µm was measured with a TSI condensation particle counter (CPC 3025). Particle mass (PM2.5) was measured with a TSI Dustrak 8520. The CO2 emissions were measured with a fast response CO2 analyser (Sable CA-10A). All emission concentrations were recorded in real time at 1 sec resolution, together with the precise passage times of buses. The instantaneous ratio of particle number (or mass) to CO2 concentration, denoted Z, was used as a measure of the particle number (or mass) emission factor of each passing bus.
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