Study On The Initial Conditions And Life Cycle Assessment Of Biomass Energy Utilization System

With the energy shortage and growing environmental pollution problems, biomass will become the important part of renewable energy, because of its regeneration and environmental friendly features. But with the development of biomass industry, there are many problems in real operation. Currently, biomass utilization system lacks a comprehensive evaluation.In this paper, as the entry point of the research on biomass industry, the "initial conditions" have been comprehensively analyzed from some aspects, such as the total distribution of biomass resources, biomass energy resource supply system, supply potential, technology and policy factors. Expecting that these Comprehensive analysis the can provide theoretical basic for the development and utilization if biomass energy from the macro level.As the supply of biomass resource plays a vital role in biomass utilization system, it determines whether the system can be operated smoothly. In order to avoid raw material supply shortage and high cost caused by overly optimistic estimates of raw material supply, resulting projects is difficult to put into operation. The study of how to evaluate the potential supply of straw resources is very important. According to the proposed evaluation index, this paper makes the evaluation of straw supply potential of Beijing.After analyzing the utilization of biomass resources based on the initial conditions, according to the characteristics of biomass power generation projects, comprehensive analysis of life cycle assessment framework, this paper proposed life cycle comprehensive assessment model of biomass utilization system based on the home and abroad study results. The model includes three indexes:environmental impact load, net energy ratio and life-cycle costs.The paper also proposed that the external environment cost should be calculated when analysis the life cycle cost.On the basis of the modle of life cycle assessment,choosing Xunxian biomass power generation system project as study case. Evaluation results show that biomass power generation project is an environmental friendly power generation. The environmental impact load of Biomass power generation system is less than that of conventional coal-fired power generation. But the life-cycle cost of Biomass power generation is higher than that of coal-fired power generation, because the system has just started and technology is not mature in China. If taking environmental costs into account when conducting economic analysis, the advantage of biomass power generation can be reflected, help to promote the development of biomass industry...