Electrical Conductivity Versus Temperature in Freezing Conditions: A Field Experiment Using a Basket Geothermal Heat Exchanger

We use a basket geothermal heat exchanger during 518 hr to freeze a portion of soil. This field experiment is monitored using time lapse electrical conductivity tomography and a set of 47 in situ temperature sensors. A frozen soil core characterized by negative temperatures and low conductivity valu...

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Veröffentlicht in:	Geophysical research letters 2019-12, Vol.46 (24), p.14531-14538
Hauptverfasser:	Coperey, A., Revil, A., Stutz, B.
Format:	Artikel
Sprache:	eng
Schlagworte:	Cation exchange Cation exchanging Cations Connecting Cores Electrical conductivity Electrical resistivity Environmental Sciences Exchange capacity Experiments Freezing freezing curve Frozen ground geothermal heat exchanger Geothermal power Heat Heat exchange Heat exchangers In situ temperature Laboratory experiments Low conductivity Moisture content Permafrost Physics Pore water Sciences of the Universe Soil Soil temperature Soil water Soils Temperature Temperature dependence Temperature sensors Tomography Water content
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Beschreibung
Zusammenfassung:	We use a basket geothermal heat exchanger during 518 hr to freeze a portion of soil. This field experiment is monitored using time lapse electrical conductivity tomography and a set of 47 in situ temperature sensors. A frozen soil core characterized by negative temperatures and low conductivity values (
ISSN:	0094-8276 1944-8007
DOI:	10.1029/2019GL084962