Combined Cycle HRSG Steam Parameters Optimization And Dynamic Characteristics

A mathematics and physics model of heat-transfer has set up on the basis of detailed analyzing the feature of the heat transfer process and construction of double-pressure-reheat heat recovery steam generator (HRSG) and three-pressure HRSG, and then optimization Model, static model and dynamic model of off-design condition have been set up on the basis of the heat-transfer model.Firstly, on the basis of the optimization model, the pressure and flow of super heated steam gas have been calculated and analysis, and analysis the regulation of the parameters.Secondly, on the basis of the off-design condition dynamic model, calculated and analysis the dynamic characteristic feature of reheat steam gas of HRSG of every pressure-level, and analysis the effect on dynamic characteristic feature from parameters of constriction and physical characteristic.Thirdly, on the basis of the off-design condition static model, with the variation of coefficient of heat transmission and specify heat of gas, calculated and analysis the steam parameters of each pressure-level on the condition of static state of HRSG.The results of this pape could be referenced during the period of designing , operating and controlling HRSG.