Raman distributed temperature sensing in underground geoexchange system

Marie Giuseffi (1) , Pierre Ferdinand (1) , Alexandre Vrain (2) , Mikael Philippe (2) , Hervé Lesueur (2)

1 LCFO - Laboratoire Capteurs Fibres Optiques
2 BRGM - Bureau de Recherches Géologiques et Minières (BRGM)

Underground heat exchangers are instrumented by eight multimode optical fiber cables connected to a distributed temperature sensing (DTS) Raman system which provides real time temperature monitoring, versus operational conditions of the installation. A user-friendly Labview® software has been developed, allowing the configuration of the full installation, the signal processing of raw DTS data and storage, as well as the visualization of any temperature profile, on request. Preliminary temperature profiles are very promising. This platform will allow R&D about geothermal exchanges, will provide a full scale bench to characterize new equipments, and will encourage professionals to develop this renewable energy sector.

Keywords: Optical Fiber Sensor; instrumentation; geothermal exchange; Geo-exchange system; Renewable energy; Green photonics; visualization software; signal processing; real time temperature monitoring; Distributed and Quasi-distributed sensing; distributed temperature sensing; heat exchanger

Domains: Instrumentation and Detectors [physics.ins-det]; Optics [physics.optics]

Marie Giuseffi, Pierre Ferdinand, Alexandre Vrain, Mikael Philippe, Hervé Lesueur. Raman distributed temperature sensing in underground geoexchange system. (EWOFS'10) Fourth European Workshop on Optical Fibre Sensors, Sep 2010, Porto, Portugal. pp.76533P, ⟨10.1117/12.865968⟩. ⟨hal-03651913⟩