大型燃煤发电机组能耗时空分布特性  

Energy consumption spatial-temporal distribution characteristics of large thermal power generating units

作　　者：杨志平[1] 王宁玲[1] 杨勇平[1] 

机构地区：[1]华北电力大学国家火力发电工程技术研究中心,北京102206

出　　处：《华北电力大学学报（自然科学版）》2014年第1期84-89,共6页Journal of North China Electric Power University：Natural Science Edition

基　　金：国家自然科学基金煤炭联合基金资助项目(U1261210);国际科技合作计划资助项目(2010DFA 72760-609)

摘　　要：火电机组的实际能耗受环境与资源条件、运行工况及外部负荷变化等因素的影响,能耗水平具有鲜明的时变特征;以大型燃煤发电机组汽轮机热力系统为研究对象,考虑复杂多变外部因素和负荷条件影响,综合应用热力学第一、第二定律和汽轮机变工况理论,从全工况角度研究机组能耗在整个汽轮机热力系统中的分布特性,得到大型燃煤发电机组在不同环境温度、不同负荷工况下汽轮机热力系统的能耗时空分布规律,进一步指导大型燃煤机组的深层次节能降耗。In general, fuel consumption rate of a real coal-fired power generation unit depends highly on many factors, such as environment-and-resource situation, operation condition and external load change, which makes it vary largely with time. Corresponding to these features and on the basis of the first and second laws of thermodynamics and the off- design prediction of steam turbine performance, detailed distribution characteristic from the perspective of all operating conditions, the coupling mechanism of thermodynamic performances among components and system at the process, component and system levels are comprehensively and thoroughly investigated. Thus, the spatial-temporal distribution principle of fuel consumption within turbine thermal system at different environmental temperatures and loads is conclu- ded, and further improved to guide deep reduction of their fuel consumption. From these view points, this research is expected to be of significant practical value.

关 键 词：大型燃煤发电机组 能耗分布 单耗分析 变工况 节能诊断 

分 类 号：TK123[动力工程及工程热物理—工程热物理]