Mathematical modelling of single pressure heat recovery steam generator

The paper presents the methodology, algorithm and results of simulations of single pressure heat recovery steam generator. The analyzed waste boiler contains economizer, evaporator, primary, secondary superheater and desuperheater. Using mass and energy balances, the mathematical model of HRSG is worked out. Development of analytical model of heat transfer in heat recovery steam generator is very complex. This approach requires a detail knowledge about construction and geometric dimensions of surface areas. Hence, to simplify descriptions of heat transfer process, an empirical equations were used. A developed system of equations was solved with the help of iterative procedure.