基于能值理论的生物质混煤发电系统评价  

Evaluation of Co-firing of Coal and Biomass Systems Based on Emergy Theory

作　　者：李春曦[1] 柳志平[1] 彭波 

机构地区：[1]华北电力大学能源动力与机械工程学院,河北保定071003 [2]中国电力投资集团公司,北京100033

出　　处：《电力科学与工程》2015年第2期6-11,共6页Electric Power Science and Engineering

基　　金：中央高校基本科研业务费专项基金(13MS98)

摘　　要：生物质混煤燃烧系统评价通常只采用效率、经济性、环境影响等单一指标。为反映其综合性能,基于能值理论,提出采用能值产出率、环境负载率、能值可持续指标和能值转换率等4指标,对不同容量生物质混煤发电系统进行综合性评价。结果表明:混烧生物质后的系统能值产出率基本不变;环境负载率均大大降低;可持续发展指标均从未加生物质之前的小于1到大于1;能值转换率均有所增加,但均远低于单纯生物质直燃发电系统。研究指出,混烧生物质前后系统的各项能值指标与机组容量关系不大;混烧生物质后,系统均从高环境负荷系统变为中等环境负荷系统,从不可持续性系统变为可持续性系统。Co-firing of coal and biomass systems are generally evaluated through efficiency, economy or environ- mental impact individually. In order to examine comprehensive evaluation, co-firing of coal and biomass systems with different capacities are assessed based on the emergy theory. Results show that compared with the conventional coal-fired power generation systems, emergy yield ratio of co-firing of coal and biomass systems are basically un- changed; environmental loading ratio decreases evidently ; emergy sustainable indices of all systems are more than 1 ; transformity increases, but is much lower than that of the biomass direct combustion power generation system. The present study indicates that emergy indexes are slightly related to the capacity of power generation systems ; co- firing of coal and biomass systems transit from high environmental load systems into medium environmental load sys- tems, and evolve from unsustainable systems into sustainable systems after co-firing of biomass.

关 键 词：生物质混煤发电系统 能值理论 可持续性 

分 类 号：TM619[电气工程—电力系统及自动化]