Lifecycle Assessment Of Automobile Alternative Fuels Based On GREET Software

With the enhancement of environment protection and serious shortage of petroleum resource, harmonious development has been the main factor for environment and energy system. Petroleum is regarded as the strategic resource, but it causes exhaustion emission and results in serious pollution in cities. Consequently, seeking alternative fuels which have the advantage of low energy consumption and emission becomes important and urgent affairs because it will decrease the dependence on petroleum resources and realize harmonious development between energy and environment.When choosing suitable alternative fuels, we must estimate them with scientific and objective methods to avoid unexpectably unilateral results. Life-Cycle Assessment (LCA) theory is the method which assesses the influence of all the devotion and output on the environment is estimated. LCA is used as an important tool to instruct choosing alternative fuels. Recently LCA theory has been applied on the research of alternative fuels from energy and environment.In the precondition of worldwide research on status and development of alternative fuels, LCA is used together with Hfecycle process and characteristic and estimation model which can be used on vehicle fuels is designed. Furthermore, GREET 1.7 software is chosen to calculate and estimate lifecycle through energy consumption and emission.In this paper, eight fuels which include gasoline and diesel are used as the first scheme to assess. Alternative effects are concluded through energy consumption and emission results gained from constructed model and the chosen software. Different ratios of biodiesel-diesel blends are used as the second scheme to assess. The conclusions indicate that compared with diesel, energy consumption of biodiesel is high, petrified fuel consumption is low, greenhouse gas is low and standard emission is high. Through the analysis of cases, emphasis should be paid on the maximum ratio of energy consumption and emission at all phases in the lifecycle, and specific schemes is analyzed and improved.