The Assessment Of Exhaust System Energy Losses
Based On The Measurements Performed Under
Actual Traffic Conditions
Author(s)
P. Fuc, J. Merkisz, P. Lijewski, A. Merkisz-Guranowska
& A. Ziolkowski
Abstract
It is generally acknowledged that energy losses from the exhaust system are
approximately 30% of the total losses of energy supplied to the engine in the
form of fuel. Part of this energy is used to heat the aftertreatment systems whose
pollutant conversion rate is tightly related to their operating temperature. The
exhaust gas flowing through the catalytic supports of the converters and filters
warms them up while the outstanding energy contained in the gases is lost
permanently. Hence, it is vital to recuperate the waste energy and convert it into
different forms such as electrical energy using thermoelectric modules. In this
paper, we determined the energy loss in an exhaust system of a city bus
following the measurements carried out under actual traffic conditions on a
regular bus route. The measurements of the exhaust gas temperature and mass
flow were performed at three points. For this, thermoresistors and a portable
exhaust emission analyzer SEMTECH DS (designed for exhaust emission testing
under actual traffic conditions) were used. Based on the measured exhaust
emission of CO2, CO and THC we determined the vehicle gas mileage. From the
vehicle diagnostic system, we pulled basic data of the engine operation and
based on this, the amount of energy supplied to the engine and the losses through
the exhaust system throughout the entire test run of the bus were determined.
Keywords: energy losses, actual traffic conditions.
Keywords
energy losses, actual traffic conditions.
Related Book
Other papers in this volume
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