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Key Performance indicators

Key Performance Indicators (KPIs) are essential metrics used to evaluate the performance of geothermal projects. In pythermogis, KPIs are calculated based on the results of the DoubletCalc and economic model calculations. The KPIs provide insights into the efficiency, profitability, and sustainability of geothermal energy projects.

The KPI have been subdivided into the following categories:

technical KPIs

Reservoir and well performance indicators are calculated based on the results of the DoubletCalc calculation

  • Reservoir Temperature [C]: The temperature of the geothermal fluid at the reservoir, which is crucial for determining the energy potential.
  • Reservoir Depth [m]: The depth below surface of the top of the reservoir
  • Thickness [m]: The thickness of the reservoir
  • Net hydraulic Transmissivity [Dm]: A measure of the reservoir's ability to transmit fluids, expressed in Darcymeters (Dm). It is calculated as the product of permeability and net thickness of the reservoir.
  • Production Temperature [C]: production temperature at the surface, typically 1-2 degrees C temperature drop compared to Reservoir temperature
  • Injection Temperature [C]: injection temperature at the surface r.
  • Flow Rate [m3/h]: The rate at which geothermal fluid is produced from the reservoir.
  • Pressure Drop [bar]: The pressure required to drive the thermal loop. The doublet model takes into account hydraulic resistance of the reservoir, friction in tubing and thermosyphon effects.
  • Power[MW]: Power production, which is the net power output of the geothermal plant after accounting for conversion efficiency and parasitic losses.
  • PowerHP[MW]: share of Power which is used as source in the heat pump
  • COP[-]: The system Coefficient of Performance (COP), which is the ratio of useful power provided to the energy consumed by the ESP and heat pump system. In case of the direct heat adnd direct heat with heat pump, the usefull power is equal to predicted Power * (1+ 1/(1-COP)), for chill and ORC it is equal to Power.
  • COPHP[-]: The Coefficient of Performance (COP) of the heat pump system, which is the ratio of useful heat provided to the energy consumed by the heat pump.

economic KPIs

  • CAPEX [million€]: The total capital expenditure for the geothermal project, including well drilling, plant construction, and other initial costs.
  • OPEXfirstyear [k€]: The operating expenditure for the first year of the geothermal project, which includes maintenance, repairs, and other ongoing costs.
  • Hprod [MWh]: The discounted total amount of geothermal energy produced over the economic lifetime, discounted by IRR
  • UTC [€ct/kWh]: The Unit Technical Cost or socalled Levelized Cost of Energy, which is the average cost per unit of energy produced over the lifetime of the project, expressed in cents per kilowatt-hour.
  • NPV [million€]: The net present value of the project, which is the difference between the present value of cash inflows and outflows over the project's lifetime. In pythermogis it is calculated as: NPV[€] = hprod [MWh] ∙ (1-tax) ∙ (utc_cutoff - UTC) ∙ 10^4. The utc_cutoff is the UTC value which is commercial or garanteed to the operator of the geothermal system. It can be set through xml configuration file, or it may be recalculated afterwards based on UTC, hprod and tax.