The paper develops a compressed natural gas (CNG) bus fuel consumption model based on the Virgina Tech Comprehensive Power-based Fuel Consumption Model (VT-CPFM) approach. The model is calibrated using GPS data and MOtor Vehicle Emissions Simulator (MOVES) energy inventory. Validation effort is first made by comparing model predictions against MOVES estimates at an instantaneous level, followed by analysis on the sensitivity of estimated optimum fuel economy cruise speeds to road grade and vehicle weight. The results demonstrate that calibrated models significantly differ from those of diesel buses. Model testing work demonstrates a good agreement between model estimates and MOVES results. The study also indicates that the optimum fuel economy cruise speed ranges between 40 to 50 km/h with road grade varying from 0% to 8%, which is similar to diesel buses. Sensitivity analysis provides valuable insights that steeper roads and heavier CNG buses result in lower optimum cruise speeds, and that optimum cruise speeds are more sensitive to vehicle weight at higher grade levels. The proposed model will greatly support ITS applications in terms of fuel efficiency improvement.
Virginia Tech Comprehensive Powered-based Fuel Consumption Model: Modeling Compressed Natural Gas Buses
2018-11-01
507383 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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