二次再热超临界供热机组热力系统经济性定量分析方法  

Economic-quantitative Analysis Method Used for the Thermodynamic System of a Supercritical Heat Supply Unit with a Double Reheat

作　　者：李杨[1] 邢秦安[1] 严俊杰[1] 林万超[1] 

机构地区：[1]西安交通大学能源与动力工程学院,陕西西安710049

出　　处：《热能动力工程》2004年第4期351-353,362,共4页Journal of Engineering for Thermal Energy and Power

摘　　要：针对二次再热超临界供热机组采用低压缸分缸抽汽供热的特点 ,利用等效热降理论 ,进行分析与数学推导 ,得出了该类型机组抽汽等效热降和抽汽效率的计算方法 ,形成该类型机组的经济性定量分析数学模型 ,从而将等效热降理论的应用范围拓展到二次再热供热机组。利用该模型 ,可以方便、迅速、准确地分析二次再热超临界供热机组热力系统的经济性。A supercritical heat-supply unit with a double reheat employs steam extraction from a low-pressure turbine cylinder for supplying process heat. On the basis of the above arrangement, a method for calculating equivalent enthalpy drop and steam extraction efficiency for the above unit is obtained by making use of an equivalent thermal-drop theory and performing a theoretical analysis and mathematical deduction. A mathematical model based on an economic-quantitative analysis has been derived for the above-mentioned turbine unit, thereby extending the application range of the equivalent heat-drop theory to heat supply units with a double reheat. By using this model it is possible to effect a convenient, rapid and accurate analysis of the thermodynamic system cost-effectiveness of the above supercritical heat supply unit.

关 键 词：二次再热 热力系统 定量分析 供热机组 

分 类 号：O414[理学—理论物理]