Thermal and hydrogeological aquifers characterization by coupling depth-resolved thermal response test with moving line source analysis
| Autor: | Matteo Antelmi, Adriana Angelotti, Sara Curnis, Andrea Zille, Loris Colombo, Luca Alberti |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Groundwater flow
020209 energy Energy Engineering and Power Technology Soil science Aquifer 02 engineering and technology Line source Thermal conductivity 020401 chemical engineering 0202 electrical engineering electronic engineering information engineering 0204 chemical engineering Groundwater geography Hydrogeology geography.geographical_feature_category Renewable Energy Sustainability and the Environment MODFLOW Depth-resolved thermal response test Thermal conduction Fuel Technology Nuclear Energy and Engineering Numerical modelling Thermal response test Advection Ground source heat pumps Moving line source Geology |
| Zdroj: | Energy Conversion and Management. 225:113400 |
| ISSN: | 0196-8904 |
| DOI: | 10.1016/j.enconman.2020.113400 |
| Popis: | In this paper for the first time the Moving Line Source (MLS) model is combined with a depth-resolved Thermal Response Test (TRT). The latter was performed in a heterogeneous and groundwater rich subsoil, composed by a layering of silty sand, medium-fine sand and coarse-medium sand, with a layer of clayey silt separating a shallow aquifer from a deep one. The temperature evolution in the ground along the vertical axis was analysed with both the standard Infinite Line Source (ILS) and the MLS. The two models lead to similar estimates of the thermal conductivity in those regions of the subsoil where conduction prevails, while the MLS performs better where a significant groundwater velocity is expected. In these layers, the MLS analysis allows to derive both the thermal conductivity and the Darcy velocity. The MLS results were validated by comparison with a numerical simulation on a multiple-layers ground model developed in MODFLOW/MT3DMS using a constant energy boundary condition. The combined depth-resolved TRT/MLS approach represents an important method for an accurate design of the Ground Heat Exchangers under the presence of groundwater flow. |
| Databáze: | OpenAIRE |
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