气体燃料发动机发展对中国温室气体减排贡献的生命周期分析

为分析气体燃料发动机的温室气体减排能力,应用生命周期分析方法计算了不同燃料的生命周期温室气体排放量,并据此计算了不同发动机的温室气体排放量.建立了气体燃料发动机“最大限度发展”和“不发展”两种情形.据此预测了2020年中国气体燃料发动机的温室气体减排效果,估算了2020年气体燃料发动机的耗气量占气体供应量的比重.结果显示,在最大限度发展情形下,气体燃料发动机将分别为城市公共交通、船舶动力和火力发电领域减少约7.47, 18.25, 450.1Mt CO2e的温室气体,减排量占全国减排目标的5.3%.气体燃料发动机将分别消耗15%的天然气、18.5%的煤层气和50%的垃圾填埋气供应量.考虑我国气体燃料资源结构情况及供应形势,推广气体燃料发动机是切实可行的.

Life-cycle analysis of contribution of developing gas engines to GHG emissions reduction in China

In order to analyze the greenhouse gas emissions reduction potential of gas engines, life-cycle analysis was carried out to calculate the life-cycle greenhouse gas emissions of different fuels, and based on the results, the emissions of the according engines were calculated. The “best case” and “without gas engines” scenarios of gas engine development were established in the analysis. Based on the analysis results, the reduction of greenhouse gas emissions by domestic gas engines in 2020 was predicted and the proportion of the gas consumption of gas engines to the gas supply was estimated. The results show that, in the best case promoting gas engines would make considerable contribution to the greenhouse gas emissions reduction. It would help to reduce about 7.47, 18.25 and 450.1Mt CO2e in city public transportation, ship power and thermal power generation fields, respectively, and its national wide CO2e reduction contribution would be 5.3%. Natural gas, coal mined gas and landfill gas that consumed by gas engines would account for 15%, 18.5% and 50% of the supply of these gases, respectively. Considering the domestic gas energy structure and gas fuel supply status, promoting gas engines is feasible in China.