中国CNG/汽油两用燃料汽车全生命周期评价

基于GaBi软件建立了压缩天然气（CNG）/汽油两用燃料汽车全生命周期评价模型，利用该模型分析了两用燃料汽车从原材料获取到报废回收各阶段的能耗和排放，以及全生命周期能耗和排放对CNG-汽油使用里程比、整车总使用里程和电力结构的敏感性。研究结果表明:全生命周期内，使用阶段能耗和污染物排放最多，占全生命周期的50%以上；主要污染物为CO、NO_x和SO₂等；CNG/汽油两用燃料汽车在成本较低的情况下可有效降低环境影响，但发展CNG专用汽车则对节能减排更为有利；实施报废汽车回收利用、增大CNG使用里程比、提高利用可再生能源发电的比例可有效降低全生命周期的能耗和排放。 

Full life cycle assessment of CNG/gasoline bi-fuel vehicle in China

A full life cycle evaluation model of compressed natural gas (CNG)/gasoline bi-fuel passenger vehicle has been established based on GaBi software, which is adopted to analyze the energy consumption and emission of the bi-fuel vehicle from the raw material acquirement phase to the scrap recycling phase, and the sensitivity of the energy consumption and emission in full life cycle towards the using mileage ratio of the CNG-gasoline, total mileage and electric power structure. The results indicate that, in the full life cycle, the energy consumption and pollutant emission in the using stage are the most, taking up more than 50% of the full life cycle; major pollutants are CO, NO_x, SO₂, etc.; the CNG/gasoline bi-fuel vehicle can effectively cut the environmental influence down with a lower cost, but a CNG special vehicle is more beneficial to the energy saving and emission reduction; the energy consumption and emission of the full life cycle can obviously decrease by recycling the scrapped vehicles, increasing the CNG using mileage ratio of bi-fuel vehicles, and improving the ratio of using renewable energy to generate power.