Key factors controlling the real exhaust emissions from earthwork machines
Abstract
This study focuses on the actual exhaust emissions of regulated and unregulated pollutants
from earthwork machines (EM). In addition to providing a realistic assessment of gaseous
and particulate emissions from key EM and filling critical data gaps in emission inventories,
it emphasizes the importance of breaking down the average operating emission factors into
task-related emission factors (TEF). The latter serve many goals, namely by: categorizing
EM in relation to their emission dynamics, finding emission determinants and proposing
on-site emission mitigation strategies. These have also led to a more refined analysis of
both the effectiveness of EU and US emissions standards and the accuracy of
NONROAD2008 model. Ultimately, by using task-related emission factors in conjunction
with data available from the literature and with the methodology developed by US-EPA,
a lower bound was estimated for gaseous exhaust emissions from the major construction
vehicles operable at earthwork sites.