Modelling of 1D Micro Gas Turbine For Range Extender Electric Vehicles

<p style="text-align: justify; ">Interest in Range-Extended Electric Vehicles (REEVs) continues to grow due to the rangelimitations imposed by battery capacities in electric vehicles and persistent long charging times.In these vehicles, when the battery level drops below a certain threshold, a range extender(Internal Combustion Engine, Fuel Cell, or Micro Gas Turbine) activates to charge the battery,thereby extending the electric vehicle's driving range. The utilization of Micro Gas Turbines&nbsp;(MGT) as range extenders is gaining increasing attention due to their high-power density andlow emission characteristics. 1D modeling techniques are frequently employed in MGT systemdesign to achieve desired performance outcomes. In this study, a 100-kW micro gas turbinewas modeled using the Siemens Amesim software. The system consists of a compressor,combustion chamber, and turbine components. Compressor and turbine maps were generatedusing the scaling method within Siemens Amesim. The design parameters of the micro gasturbine were determined as a shaft rotational speed of 88500 rpm, a pressure ratio of 5, and anair mass flow rate of 0.82 kg/s. Compressor and turbine efficiencies were defined as 0.79 and0.89, respectively. Methane was utilized as fuel. As a result of the modeling, compressor andturbine performances were examined. The effect of Turbine Inlet Temperature (TIT) on thesystem's thermal efficiency was demonstrated as a function of the pressure ratio. It wasobserved that thermal efficiency increases with rising TIT but declines after a certain pressureratio. The study concludes that micro gas turbines represent an efficient, sustainable, andcompact range extender solution for electric vehicles.