Effectiveness of time-series analysis for thermal plume propagation assessment in an open-loop groundwater heat pump plant
| Autor: | Elena Cerino Abdin, Stefano Lo Russo, Paolo Dabove, Glenda Taddia, Ambrogio Manzino |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Convection
Groundwater heat pump systems Thermal affected zone Time series analysis Advective flow Cross-correlation function 0208 environmental biotechnology Soil Science Soil science Aquifer 02 engineering and technology 010501 environmental sciences 01 natural sciences law.invention law Environmental Chemistry 0105 earth and related environmental sciences Earth-Surface Processes Water Science and Technology Global and Planetary Change geography geography.geographical_feature_category Advection Piezometer Geology Pollution 020801 environmental engineering Plume Heat transfer Environmental science Groundwater Heat pump |
| Popis: | Thermal perturbation produced in the subsurface by open-loop groundwater heat pumps (GWHPs) represents a complex transport phenomenon that is affected by several factors, including intrinsic characteristics of the exploited aquifer, abstraction and reinjection well features, and the temporal dynamics of the accessed groundwater. Post-GWHP water may have become warmed or cooled before being reinjected into the aquifer, thereby creating a thermal plume, known as the thermal affected zone (TAZ), which can alter aquifer temperature. The TAZ is propagated mainly by advection, after which the plume tends to degrade via conductive heat transport and convection within moving water. Groundwater monitoring and multiparametric probes are used to check the dynamics of plume propagation and whether a system’s thermal plumes are generating unsuitable interference with wells, subsurface infrastructure, or land use. Analyses of time-series groundwater monitoring data can be used to monitor TAZ movement. In this paper, the thermal plume velocity was calculated by both an analytical solution and cross-correlation. Cross-correlation calculated between temperature measured in the reinjection well and control downstream piezometers can reveal plume dynamics and demonstrate the importance of advective transport in aquifer heat transfer. |
| Databáze: | OpenAIRE |
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