路面类型对能耗和排放影响研究

研究了路面类型对能耗和排放的影响。结果表明:刚性和柔性路面之间在燃油消耗和气体排放方面存在巨大的差异,尤其是在道路设计使用年限内能耗和排放总量上的差别更大。同时,建议将能耗和排放列入到道路生命周期成本分析中。选择刚性和柔性两种类型的城市道路,以及恒速和加速行驶两种行驶模式作为对比研究。测试数据显示:在显著水平为10%的统计数据下,刚性路面试验段的燃油消耗率要比柔性路面低;而在加速模式下,尽管刚性路面的燃油消耗也是较低,但从统计数据上看并不明显。以陕西省城市道路为例,以年度燃油消耗的总量来评估不同路面类型的年度二氧化碳排放总量。在相同的驾驶条件下(48 km/h),刚性路面每年可以节省大约5.8亿升的燃料,同时减少排放将近62万公吨的二氧化碳。

Effect of Pavement Type on Fuel Consumption and Emissions

ABSTRACT: The impact of pavement type on fuel consumption and emissions was studied. The results showed that rigid and flexible pavement surfaces in fuel consumption and emissions have significant differences. And this study suggested that fuel consumption and emission should be considered in life cycle cost analyses of alternative designs. This article chose rigid and flexible pavement surfaces in the constant speed and acceleration driving mode for comparative study. The differences in fuel consumption rates were determined to be statistically significant at 10% level of significance for the constant speed runs with the rate for the rigid section being lower. Under the acceleration mode, while the rigid pavement runs again showed lower rates, the differences were not statistically significant. The total fuel consumption amounts were then used to estimate the total annual CO2 productions in the Dallas-Fort Worth region in Texas under each pavement surface type. Under similar urban driving conditions (30 mph), the rigid pavement results in a total fuel savings of about 177 million gallons and a reduction of approximately 0.62 million metric tons of CO2 per annum.