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Modeling the effects of the variability of temperature-related dynamic viscosity on the thermal-affected zone of groundwater heat-pump systems

Modeling the effects of the variability of temperature-related dynamic viscosity on the... Thermal perturbation in the subsurface produced in an open-loop groundwater heat pump (GWHP) plant is a complex transport phenomenon affected by several factors, including the exploited aquifer’s hydrogeological and thermal characteristics, well construction features, and the temporal dynamics of the plant’s groundwater abstraction and reinjection system. Hydraulic conductivity has a major influence on heat transport because plume propagation, which occurs primarily through advection, tends to degrade following conductive heat transport and convection within moving water. Hydraulic conductivity is, in turn, influenced by water reinjection because the dynamic viscosity of groundwater varies with temperature. This paper reports on a computational analysis conducted using FEFLOW software to quantify how the thermal-affected zone (TAZ) is influenced by the variation in dynamic viscosity due to reinjected groundwater in a well-doublet scheme. The modeling results demonstrate non-negligible groundwater dynamic-viscosity variation that affects thermal plume propagation in the aquifer. This influence on TAZ calculation was enhanced for aquifers with high intrinsic permeability and/or substantial temperature differences between abstracted and post-heat-pump-reinjected groundwater. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Hydrogeology Journal Springer Journals

Modeling the effects of the variability of temperature-related dynamic viscosity on the thermal-affected zone of groundwater heat-pump systems

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Publisher
Springer Journals
Copyright
Copyright © 2018 by Springer-Verlag GmbH Germany, part of Springer Nature
Subject
Earth Sciences; Hydrogeology; Hydrology/Water Resources; Geology; Water Quality/Water Pollution; Geophysics/Geodesy; Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution
ISSN
1431-2174
eISSN
1435-0157
DOI
10.1007/s10040-017-1714-x
Publisher site
See Article on Publisher Site

Abstract

Thermal perturbation in the subsurface produced in an open-loop groundwater heat pump (GWHP) plant is a complex transport phenomenon affected by several factors, including the exploited aquifer’s hydrogeological and thermal characteristics, well construction features, and the temporal dynamics of the plant’s groundwater abstraction and reinjection system. Hydraulic conductivity has a major influence on heat transport because plume propagation, which occurs primarily through advection, tends to degrade following conductive heat transport and convection within moving water. Hydraulic conductivity is, in turn, influenced by water reinjection because the dynamic viscosity of groundwater varies with temperature. This paper reports on a computational analysis conducted using FEFLOW software to quantify how the thermal-affected zone (TAZ) is influenced by the variation in dynamic viscosity due to reinjected groundwater in a well-doublet scheme. The modeling results demonstrate non-negligible groundwater dynamic-viscosity variation that affects thermal plume propagation in the aquifer. This influence on TAZ calculation was enhanced for aquifers with high intrinsic permeability and/or substantial temperature differences between abstracted and post-heat-pump-reinjected groundwater.

Journal

Hydrogeology Journal – Springer Journals

Published: Jan 13, 2018

References

  • The impact of the use of heat pumps on ground-water temperatures
    Andrews, CB
  • Energy and environmental analysis of an open-loop groundwater heat pump system in an urban area
    Baccino, G; Lo Russo, S; Taddia, G; Verda, V
  • Dynamics of fluids in porous media
    Bear, J
  • Shallow groundwater temperature in the Turin area (NW Italy): vertical distribution and anthropogenic effects
    Bucci, A; Barbero, D; Lasagna, M; Forno, MG; Luca, DA
  • Conduction of heat in solids
    Carslaw, HS; Jager, JC
  • Heat transfer in ground heat exchangers with groundwater advection
    Diao, N; Li, Q; Fang, Z
  • FEFLOW: finite element subsurface flow and transport simulation system. User’s manual and white papers I, II, III, IV
    Diersch, HJG
  • FEFLOW 6: user’s manual
    Diersch, HJG
  • A theoretical study of heat extraction from aquifers with uniform regional flow
    Gringarten, AC; Sauty, JP
  • Evaluating MT3DMS for heat transport simulation of closed geothermal systems
    Hecht-Mendez, J; Molina-Giraldo, N; Blum, P; Bayer, P
  • Modeling and performance evaluation of shallow ground water heat pumps in Beijing plain, China
    Liang, J; Yang, Q; Liu, L; Li, X
  • Ground-water use or cooling: associated aquifer temperature changes
    Lippmann, MJ; Tsang, CF
  • Hydrogeological and thermal characterization of shallow aquifers in the plain sector of Piemonte region (NW Italy): implications for groundwater heat pumps diffusion
    Lo Russo, S; Civita, MV
  • Advective heat transport in an unconfined aquifer induced by the field injection of an open-loop groundwater heat pump
    Lo Russo, S; Taddia, G
  • Development of the thermally affected zone (TAZ) around a ground water heat pump (GWHP) system: a sensitivity analysis
    Lo Russo, S; Taddia, G; Verda, V
  • Thermal energy storage in an unconfined aquifer: 2. model development, validation, and application
    Molson, JW; Frind, EO; Palmer, CD
  • Importance of thermal dispersivity in designing groundwater heat pump (GWHP) system: field and numerical study
    Park, BH; Bae, GO; Lee, KK
  • Thermal impact of residential ground-water heat pumps
    Warner, DL; Algan, U