Thermodynamic Optimization for an Advanced Integrated Combined Heat and Power Gas Turbine Engine

This paper presents the thermodynamic optimization of a 350 kW integrated combined heat and power gas turbine engine. The development of micro gas turbine engine depends on the thermodynamic cycle, thus this study is relying on the Brayton cycle with regeneration, taking into accounts the significant importance of the heat transfer efficiency within the regenerator and its impact on other parameters. The calculation methodology was implemented on an in-house code written in the Fortran 90 programming language. Multiple calculations were made, varying pressure ratios between 2 and 6 and regenerative effectiveness in the range of 47-80%. Following the analysis, a pressure ratio of 5: 1 was chosen with a mass flow rate of 2.6 kg/s. For technological reasons, the turbine inlet temperature was limited to 900 °C.