For the urbain intermodal transport project (including a high-speed line station), the Nîmes Métropole authorities decided to implement ground source heat pumps (GSHP).
Setec led the feasibility studies based on the results of 2 exploration bores and developed a thermal and hydrodynamic model which enabled to determine the critical flow rate of the installations (40m³/h) and the maximum overall flow rate to be sourced from ground water (80 m3/h).


o drafting of the feasibility study
o implementation sites proposal for the 2 exploration bores
o thermal and hydrodynamic modeling of the ground source
o estimate of the thermal and quantitative impacts of the different solutions
o feasibility study report and recommendations


Nîmes Métropole authority

Key figures

Period of services

Key challenges

The thermal and hydrodynamic model was developed under Feflow calculation software.
This software enables to simulate the impacts of one or several geothermal doublet plants according to various operations (re-injection temperature, flow rate variation over time).
The temperature is measured at the pumping well in order to assess a possible groundwater recycling process (piercing time calculation).