Analiza numeryczna eksploatacji układu skojarzonego z turbina gazowa przy zmiennych parametrach otoczenia

Gas Turbine Combined Cycle power plants are a one of the most efficient energy conversion systems. These systems encompass gas turbine cycle, steam turbine cycle and heat recovery steam generator. Electric power of Gas Turbine Combined Cycle power plant heavily depends on ambient parameters - mainly on temperature. A variation of ambient parameters changes compressor working point, hence temperature and stream of flue gas leaving gas turbine can be changed. In consequence, boiler efficiency and steam flow and parameters can also be changed. The article presents a numerical analysis of influence of ambient parameters on energy exploitation indicators of gas turbine and double pressure heat recovery steam generator. Effect of variation of ambient temperature on gas turbine power, flue gas stream and temperature at the outlet of turbine was modelled with the use of correction curves. Mathematical model of heat recovery steam generator is based on mass and energy equations and additional equations which describe heat transfer process. Unknown empirical parameters which occur in in empirical equations are taken from the literature. The calculation method and exemplary calculation results are presented.