基于变热量等效热降的混合发电系统通用矩阵模型  

General-purpose Matrix Model for Hybrid Power Generation Systems Based on a Variable Heat Quantity Equivalent Heat Drop

作　　者：叶学民[1] 祁成[2] 李春曦[1] 

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]西北电力设计院,陕西西安710075

出　　处：《热能动力工程》2013年第1期99-104,114,共6页Journal of Engineering for Thermal Energy and Power

摘　　要：以定热量等效热降法为基础,建立了混合发电系统的变热量等效热降通用矩阵模型。以某600 MW机组的混合发电系统为例,利用矩阵通用模型计算了该机组采用混合发电的热经济性,分析了混合发电系统的优越性。研究表明,系统效率、节煤量、CO2减排量与辅助热源系统作用位置及流量分配系数密切相关,辅助热源系统作用于高压级加热器时系统的节能潜力及经济效益总体好于作用于低压级时,辅助热源系统作用于各低压级加热器时,各高压级和除氧器级的抽汽效率均有提高。On the basis of a constant heat quantity equivalent heat drop method,established was a variable heat quantity equivalent heat drop general-purpose matrix model for hybrid power generation systems.With a 600 MW unit integrated in a hybrid power generation system serving as an example,by using the general purpose matrix model,the thermal cost-effectiveness of the unit in a hybrid power generation system was calculated with the advantages of the hybrid power generation system being analyzed.The research results show that the system efficiency,coal quantity saved and carbon dioxide emissions reduced are closely related to the location acted by the auxiliary heat source system and the flow distribution coefficient.When the auxiliary heat source system acts on the high pressure stage heaters,the energy saving potential and the economic benefit of the system are as a whole better than those when it acts on the low pressure stage heaters.When the auxiliary heat source system acts on various low pressure stage heaters,the steam extraction efficiencies of various high pressure stages and the deaerator stage will be improved.

关 键 词：变热量等效热降 混合发电 矩阵模型 热经济性 

分 类 号：TK212[动力工程及工程热物理—动力机械及工程]