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Nîmes Métropole urbain intermodal transport project geothermal feasibility

Missions

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

Client

Nîmes Métropole authority

Location

France

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).

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).

Nîmes Métropole urbain intermodal transport project geothermal feasibility

Missions

Client

Location

Challenges

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