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Characteristic Analysis of Coal-to-liquid Application in Diesel Engines
Based on Plateau Environment
LIU Weilin
2023, 48(17):
112-118.
DOI: 10.16638/j.cnki.1671-7988.2023.017.020
At different altitudes, there are few studies on the performance of coal-to-liquid
application to GB Ⅵ diesel engines, so it is necessary to analyze and study it. On a diesel engine
compliant with GB Ⅵ emissions, tests are conducted using an engine dynamometer with an altitude
simulation system to evaluate the power performance, fuel economy and emission performance of
three fuel samples, including GB Ⅵ standard diesel (G6), a blend of direct and indirect coal-to-
liquid harmonious fuels (D1), and direct coal liquefaction fuel (D2) at altitudes of 0 m, 1 700 m and
3 000 m. The results show that in terms of power performance, with increasing altitude, all three
fuel samples exhibite a decrease in maximum torque under transient conditions, and D1 and D2 show an average reduction of 0.79% and 0.95%, respectively compares to G6. However, D1 fuel
with an oxygen enhancers maintain similar power performance to G6 at 3 000 m altitude; In terms
of fuel economy, at 0 m altitude, D1 fuel exhibite an average reduction of 1.22% in effective fuel
consumption rate compares to G6, while D2 fuel is comparable to G6; In terms of emission
performance, D1 and D2 fuels show an increase in NOx emissions of 3.42% and 4.6%, respectively,
compares to G6 at 0 m altitude. As the altitude increased, NOx emissions exhibite varying degrees
of increase. To the particulate matter (PM) & particulate number (PN) emissions show an opposite
trend, and both D1 and D2 fuels exhibite higher emissions of HC/CO compare to G6. Furthermore,
all three fuel samples exhibite no ammonia leakage at different altitudes.
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