汽轮机主汽温变化对煤耗率影响的强度系数计算模型  

Strength Coefficient Calculation Model of Influence of Main Steam Temperature Variation on Coal Consumption Rate

作　　者：闫顺林[1] 李永华[1] 武庆源[1] 

机构地区：[1]电站设备状态监测与控制教育部重点实验室(华北电力大学),河北省保定市071003

出　　处：《中国电机工程学报》2011年第26期38-43,共6页Proceedings of the CSEE

摘　　要：为达到火电机组节能降耗的目的,以火电机组热经济性分析的统一物理模型和数学模型为基础,借助偏微分理论和梯度算子,建立了主蒸汽温度变化对机组经济性影响的通用强度系数计算模型。主汽温强度系数的提出使得在计算主汽温改变对煤耗率的影响时不用进行复杂的建模和计算,而仅利用对应负荷下的强度系数乘以主汽温变化量就可得到。通过对某600 MW机组典型工况的计算,表明应用强度系数模型计算主蒸汽温度改变对煤耗率的影响时计算量小、精度高。For saving energy in coal-fired power plants, a general strength coefficient calculation model was established with partial differentia/theory and the gradient operator, which was based on the unified physical model and mathematic model in heat-economic analysis. The suggested strength coefficient is more convenient to obtain coal consumption rate with the strength coefficient directly multiplying by the corresponding main steam temperature change, without formulating complex models in previous literatures. Investigation of typical working conditions of a 600 MW unit shows that the present model have little computational amount but also have high precision.

关 键 词：主蒸汽温度 热经济性 煤耗率 强度系数 

分 类 号：TK284[动力工程及工程热物理—动力机械及工程]