The energy consumption and emission of a middle grade city bus fueled with DME fuel and conventional diesel are compared through engine bench test and road driving. Combined with the data in fuel production and transportation phases
the life cycle indicator of the two fuels used in the middle grade city bus is analyzed and compared. The results show that
compared with conventional diesel vehicle
in the total life cycle
the total energy consumption
CO
2
Particulate matter and SO
2
of dimethyl ether vehicle increase by 201.3%
291.2%
94.2%
86.7% respectively
and theVolatile organic compound
CO
NO
x
emissions decrease by 30.5%
65.3% and 26.4% respectively; while in the vehicle operation stage
excluding CO
2
all emissions reduce.
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references
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