基于生命周期评价的高速铁路减排效果

Carbon dioxide emission reduction of high-speed railway

在确定高速铁路和高速公路碳排放评价对象和范围的基础上,进行这2种运输方式的碳排放清单分析,并建立高速铁路和高速公路在各自生命周期不同阶段碳排放量的核算模型,以及与高速公路相比高速铁路碳减排相对回收期的计算公式。数值算例表明虽然在建造阶段高速铁路的碳排放量相对于高速公路多,但在运营阶段高速铁路的碳排放量相对少,并且从生命周期全过程来看,高速铁路的年均碳排放量少于高速公路,相对回收期也较短。由此可见,高速铁路具有较好的减排效果。

The carbon dioxide emission inventory of high-speed railway and highway was analyzed based on selecting their evaluation object and scope of dioxide carbon emission in their whole life cycle, and the models to calculate carbon emission quantities emitted by high-speed railway and highway in every stage of their whole life cycle was established, and its relative carbon dioxide payback period of high-speed railway when comparing with highway was calculated. The numerical example shows that high-speed railway emits more carbon dioxide than highway in the construction stage, but it emits less carbon dioxide than highway in the operation stage, and its relative payback period is short. And the effect of carbon dioxide emission reduction of high-speed railway is very good.