对一组常用锅炉过热器传递函数的改进  

Modification of a Set of Transfer Function in Common Use for Super-heater in Boiler

作　　者：陈钢[1] 任挺进[1] 

机构地区：[1]清华大学热科学与动力工程教育部重点实验室,北京100084

出　　处：《锅炉技术》2006年第5期1-4,43,共5页Boiler Technology

基　　金：国家高技术研究发展计划863资助项目(2002AA525014)

摘　　要：从实际物理意义出发,对一组常用的锅炉过热器简化传递函数进行分析。证明了简化过程应该先将介质流动时间常数T0从理论传递函数中分离出来,决定分类讨论的标准不是T0,而是动态特性参数a,从而动态参数a的决定性作用得以彰显,这是与以往结论的区别。准确地得到了“kD理论”,将所有情况归纳为2个公式,且包含惯性环节阶数为非整数时的高精度处理方法,深化了这类热工设备动态特性的认识,便于实际应用。Based on the physic significance, a set of trans（er function for super-heater in the boiler was analyzed. It was proved that the medium flow constant time（T0）should be separated from the theoretic transfer function in the predigest process. It should not be To but the dynamic characteristic parameter （a） classifying the discussion course. The＂theory of kD＂was deduced exactly. All the situation was summed up by two expressions, which including a high precision approximation technique when the inertia rank was not whole number. The understanding of dynamic characteristics for this kind of equipment was deepened, and it was convenient to practice.

关 键 词：锅炉 过热器 动态特性 传递函数 模型 

分 类 号：TK223[动力工程及工程热物理—动力机械及工程]