Reference : Heat transfer characterization in a shallow aquifer using heat and dye tracer tests
Scientific congresses and symposiums : Unpublished conference/Abstract
Engineering, computing & technology : Geological, petroleum & mining engineering
http://hdl.handle.net/2268/161236
Heat transfer characterization in a shallow aquifer using heat and dye tracer tests
English
Wildemeersch, Samuel [Université de Liège - ULg > Département ArGEnCo > Hydrogéologie & Géologie de l'environnement >]
Orban, Philippe mailto [Université de Liège - ULg > Département ArGEnCo > Hydrogéologie & Géologie de l'environnement >]
Hermans, Thomas mailto [Université de Liège - ULg > Département ArGEnCo > Géophysique appliquée >]
Brouyère, Serge mailto [Université de Liège - ULg > Département ArGEnCo > Hydrogéologie & Géologie de l'environnement >]
Dassargues, Alain mailto [Université de Liège - ULg > Département ArGEnCo > Hydrogéologie & Géologie de l'environnement >]
22-Jul-2013
No
No
International
IAHS IAPSO IASPEI Joint Assembly Knowledge for the future, Workshop Hw08: Subsurface warming, heat energy and groundwater
22-26 July 2013
IAHS IAPSO IASPEI
Gothenburg
Sweden
[en] heat transfer ; groundwater ; tracer test ; hydrothermal properties ; solute transport ; very low enthalpy geothermal systems
[en] Very low enthalpy geothermal systems (open or closed) are increasingly considered for heating or cooling houses and offices using groundwater energy combined with heat pumps.
However, the design and the impact of current shallow geothermal systems are often set up and assessed in a semi-empirical way. In our country, this situation seems accepted by most of
the private partners but not by the authorities and responsible administrations evaluating the impact on groundwater with a mid- to long-term perspective. A rigorous methodology is
needed based on a physically based estimation of heat transfer parameters. In this study, the simultaneous use of heat and dye tracers allows estimating simultaneously heat transfer and
solute transport parameters in an alluvial aquifer. The experimental field site, located near Liege (Belgium), is equipped with 21 piezometers drilled in the alluvial deposits of the Meuse
River. These alluvial deposits are composed of a loam layer (3 m) overlying a sand and gravel layer which constitutes the alluvial aquifer (7 m). The tracing experiment consisted in injecting
simultaneously heated water and a dye tracer in a piezometer and monitoring the evolution of groundwater temperature and tracer concentration in a series of control panels set
perpendicularly to the main groundwater flow. Results showed drastic differences between heat transfer and solute transport due to the main influence of thermal capacity of the saturated
porous medium. The tracing experiment was then simulated using a numerical model and the best estimation of heat transfer and solute transport parameters is obtained by calibrating this
numerical model using inversion tools. The developed concepts and tests may lead to real projects of various extents that can be now optimized by the use of a rigorous and efficient
methodology at the field scale.
Aquapôle - AQUAPOLE
ULg and FNRS
Researchers ; Professionals
http://hdl.handle.net/2268/161236

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