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Comparison of Clean Diesel Buses to CNG Buses
| 题名： | Comparison of Clean Diesel Buses to CNG Buses |
| 作者： | Lowell, D. M.; Parsley, W.; Bush, C.; Zupo, D. |
| 关键词： | Buses##Diesel fuels##Natural gas##Comaprisons##Compressed gases##Exhaust emissions##Filters##Alternative fuels##Emission factors##Particulates##Environmental effects##Benzene##Toxic substances##Health effects##Operating costs##Carbonyls##Diesel engines##Sulfur##Nitrogen oxides##Compressed natural gas(CNG)## |
| 摘要： | Using previously published data on regulated and unregulated emissions, this paper will compare the environmental performance of current generation transit buses operated on compressed natural gas (CNG) to current generation transit buses operated on ultra low sulfur diesel fuel (ULSD) and incorporating diesel particulate filters (DPF). Unregulated emissions evaluated include toxic compounds associated with adverse health effects (carbonyl, PAH, NPAH, benzene) as well as PM particle count and size distribution. For all regulated and unregulated emissions, both technologies are shown to be comparable. DPFequipped diesel buses and CNG buses have virtually identical levels of PM mass emissions and particle number emissions. DPF-equipped diesel buses have lower HC and CO emissions and lower emissions of toxic substances such as benzene, carbonyls and PAHs than CNG buses. CNG buses have lower NOx emissions than DPF-equipped buses, though CNG bus NOx emissions are shown to be much more variable. |
| 总页数： | 50 |
| 报告类型： | 科技报告 |
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