摘要
运用 LCA 的方法,对4MW 的微藻气化发电系统进行分析,计算出全生命周期的资源消耗和环境影响潜值。结果表明干微藻气化能产生气体的热值是17.7MJ/kg,每生产1MW·h 的电能需消耗908.41kg 微藻,产生的总环境影响负荷是2.175人当量,资源消耗系数是1.455毫人当量。由于微藻的光合作用能固定尾气中的 CO_2,若将烟道尾气用于微藻的养殖,将尾气中50%的 CO_2的吸收用于自身的生长,大大降低了 CO_2的排放量。全球变暖潜值(GW)由原来的0.196降低至0.141,下降了28%,由于 CO_2的减排使环境总负荷也下降了3%,表明尾气的循环利用对减轻环境负荷具有十分重要的意义。
The electric power production from microalgae by gasification in a 4MW power plant was analyzed by a Life Cycle Assessment approach which is applied to calculate the values of the environmental impact load and the depletion of natural resources coefficient. The results indicate that the values are 2. 175 PET and 1.455 mPET for every 1MW electric power produced from 908.41kg microalgae. Since the microalgae can fix CO2 through photosynthesis, the previous value of GW 0. 196 fellows down to 0. 141, which decrease 28% by injecting the stack gas directly to the microalgae pond. The total environmental impact load decrese 3 % by CO2 mitigation. Obviously recycling the stack gas to cultivate the microalgae plays a positive part in mitigating greenhouse gases.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2008年第11期1414-1418,共5页
Acta Energiae Solaris Sinica
关键词
微藻
气化
生命周期分析
碳循环
资源消耗系数
环境影响负荷
microalgae
gasification
LCA
C-recycling
depletion of natural resources coefficient
environmental impact load
