N2 - The paper presents thermodynamic analysis of the gas-steam unit of the 65 MWe combined heat and power station. Numerical analyses of the station was performed for the nominal operation conditions determining the Brayton and combined cycle. Furthermore, steam utilization for the gas turbine propulsion in the Cheng cycle was analysed. In the considered modernization, steam generated in the heat recovery steam generator unit is directed into the gas turbine combustion chamber, resulting in the Brayton cycle power increase. Computational flow mechanics codes were used in the analysis of the thermodynamic and operational parameters of the unit. L1 - http://www.czasopisma.pan.pl/Content/94343/PDF/03_paper.pdf L2 - http://www.czasopisma.pan.pl/Content/94343 PY - 2012 IS - No 3 October EP - 47 DO - 10.2478/v10173-012-0016-x KW - Brayton cycle KW - Gas-steam unit KW - Cheng cycle KW - numerical analysis KW - CHP A1 - Chrzczonowski, Andrzej A1 - Ziółkowski, Paweł A1 - Badur, Janusz A1 - Jesionek, Krzysztof PB - The Committee of Thermodynamics and Combustion of the Polish Academy of Sciences and The Institute of Fluid-Flow Machinery Polish Academy of Sciences DA - 2012 T1 - Power enhancement of the Brayton cycle by steam utilization SP - 36 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/94343 T2 - Archives of Thermodynamics