AAAR 32nd Annual Conference
September 30 - October 4, 2013
Oregon Convention Center
Portland, Oregon, USA
Abstract View
Evaluation of Dilution System for On-Road Aerosol Emission Measurement from Automobiles
JAI PRAKASH, Akash Sharma, Anil Kumar, Gazala Habib, IIT Delhi
Abstract Number: 665 Working Group: Combustion
Abstract Aerosol emission and its composition from sources depend upon the energy use pattern and existing technologies in a region. Previous emission inventories have placed biomass fuel use in domestic sector as a major source of aerosol emission in developing regions like India and other part of South Asia, with considerably growing contribution from fossil fuel. Among fossil fuel based sectors, road transportation is one of the major contributors to aerosol emission in India. Real-time aerosol emissions represent complex mixture of solid particles (like EC), inorganic and organic compounds after exiting the source, cooling, and equilibrating to ambient conditions. Therefore, present study focuses on development of dilution sampler for real time aerosol measurement. The system will be equipped with particle sampling probe, vane probe velocity meter, flue gas analyzer, PM$_(2.5) sampler, CO$_2 analyzer, temperature and relative humidity sensors. The system will be attached to tail pipe of the vehicle with the help insulated hoses. Emission will entrain into stainless steel duct and a fraction (0.6 LPM) of exhaust will be taken into dilution tunnel through particle sampling probe, where it will be diluted through measured quantity of zero air and sampled within residence time of 3 sec. Velocity and CO$_2 of exhaust in the duct will be recorded each minute. Fuel consumption will be recorded at the end of each experiment using fuel consumption flow meter. The particles will be collected on quartz filters and emission factors will be calculated using particle mass collected on filter, exhaust velocity, area of duct, experiment time and fuel consumption. The paper will discuss the evaluation of new system and emission factors of PM$_(2.5), OC, EC ions for light duty vehicles. The implication of the results for refinement of emission inventory and regional climate study will also be discussed.