Numerical analysis and optimization of the performance of CO2-Plume Geothermal (CPG) production wells and implications for electric power generation

•A coupled flow and power model is set up to optimize the flowrate of CPG wells.•The optimal flowrate maximizes power output and minimizes reservoir pressure drawdown.•We show that water accumulation in the production well is avoidable.•The minimal superficial CO2 velocity can be a design parameter for a CPG system.•An explanation is given on why the cranfield CO2 thermosiphon field test failed.