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理论和实践证明,各种联合循环均存在有使循环热效率达最高值的热力特性参数最优化组合.寻求这样的最优化组合是十分重要的. 一、最优化数学模型 由热力学知,联合循环发电装置的热效率η是与燃气循环参数及系统、蒸汽循环参数及系统、燃料特性、各组成元件的内效率及压力保持系数、联合循环的型式、燃机与汽机功率比等诸因素有关的多元函数,很难求得解析表达式.本文选取次要影响因素为确定值,
Theory and practice have proved that all kinds of combined cycle exist the optimal combination of the thermal characteristics parameters which make the cycle thermal efficiency reach the highest value.It is very important to seek such optimal combination.One is the optimization mathematical model It is known from the thermodynamics that the combined cycle power generation The thermal efficiency η of the device is a multivariate function related to gas circulation parameters and system, steam cycle parameters and system, fuel characteristics, internal efficiency of each component and pressure maintenance factor, type of combined cycle, gas turbine and turbine power ratio and the like , It is difficult to get the analytic expression.This paper chooses the secondary influencing factor as the definite value,