EFFECT OF AMBIENT TEMPERATURE ON A COMBINED REGENERATIVE AND REHEAT GAS TURBINE CYCLE USING MATLAB [ READ ]
RAJIV RANJAN AND MOHAMMAD TARIQ
In recent development of gas turbine cycles, new software for calculating thermal efficiency and power output of a combined reheat-regenerative cycle are applied.There are one compressor and one turbine used in regeneration gas turbine cycle and one compressor and two turbines are used in reheat cycle. In the combined cycle, one compressor and two turbines namely, HP turbine and LP turbine are used in this work. The temperature after reheating assumes to be reaching at the same temperature of HP turbine inlet.A full numerical model for the engine is built. This model takes into account the variations in specific heat and the effects of turbine cooling flow. Also, the model considers the efficiencies of all components, effectiveness of heat exchangers and the pressure drop in relevant components. The thermodynamic analysis has been performed using MATLAB software. The parameters taken in the well defined range for overall pressure ratio, turbine inlet temperatures and ambient temperature. The cycle performs the analysis for various regenerative effectiveness and various turbine inlet temperatures. It is found that the mass flow ratedecreases on increasing the regenerative effectiveness while increases on increasing the turbine inlet temperature. Also found that the heat required in the burner decreases for higher regenerative effectiveness.
RAJIV RANJAN AND MOHAMMAD TARIQ
In recent development of gas turbine cycles, new software for calculating thermal efficiency and power output of a combined reheat-regenerative cycle are applied.There are one compressor and one turbine used in regeneration gas turbine cycle and one compressor and two turbines are used in reheat cycle. In the combined cycle, one compressor and two turbines namely, HP turbine and LP turbine are used in this work. The temperature after reheating assumes to be reaching at the same temperature of HP turbine inlet.A full numerical model for the engine is built. This model takes into account the variations in specific heat and the effects of turbine cooling flow. Also, the model considers the efficiencies of all components, effectiveness of heat exchangers and the pressure drop in relevant components. The thermodynamic analysis has been performed using MATLAB software. The parameters taken in the well defined range for overall pressure ratio, turbine inlet temperatures and ambient temperature. The cycle performs the analysis for various regenerative effectiveness and various turbine inlet temperatures. It is found that the mass flow ratedecreases on increasing the regenerative effectiveness while increases on increasing the turbine inlet temperature. Also found that the heat required in the burner decreases for higher regenerative effectiveness.
