Utilisation de l'ordinateur pour l'elaboration des cartes geotechniques dans la region liegeoise

Calembert, Léon; Monjoie, Albéric; Polo-Chiapolini, Cl.; Cajot, O.; Fagnoul, A.; Langohr, Roger; Déprez, Guillaume Roland Michel

doi:10.1007/bf02591556

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2013

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“…The surrounding rock is considered homogeneous with saturated thermal conductivity equal to 3.6 W/mK and initial temperature equal to 12°C. Lithological logs of the area (Calembert et al 1975) and observation of the cuttings during the drillings indicate the bedrock depth at approximately 13m. It probably consists mainly of red and grey sandstones interlayered with shales.…”

Section: Examplementioning

confidence: 94%

Thermal Response Test in Borehole Heat Exchangers Equipped with Fiber Optics

Radioti¹,

Charlier²,

Nguyen³

et al. 2013

Proceedings

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SUMMARYFour double-U borehole heat exchangers (BHEs) of 100m long were installed on the campus of the University of Liège (Liège, Belgium). The installation procedure and technical difficulties are presented. Fiber optic cables are attached along the length of one pipe loop in each BHE. Temperature is measured along the fibers based on the fiber optic distributed temperature sensing (DTS) technique. Thermal response test (TRT) is conducted in order to determine the rock thermal properties. The DTS instrument records the temperature evolution along the pipe loop during the TRT. Rock thermal conductivity through depth can be estimated based on the recorded data. A 3D model is developed using the finite element code LAGAMINE in order to simulate the TRT. The accuracy of the numerical model is improved by simulating the potential variation of the rock thermal conductivity.

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Section: Examplementioning

confidence: 94%