Effectiveness of time-series analysis for thermal plume propagation assessment in an open-loop groundwater heat pump plant

Russo, Stefano Lo; Taddia, Glenda; Dabove, Paolo; Abdin, Elena Cerino; Manzino, Ambrogio

doi:10.1007/s12665-018-7820-9

Cited by 7 publications

(10 citation statements)

References 30 publications

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“…The values of thermal load obtained at the end of the simulations (Table 3) are comparable with those analytically estimated using Equation (12), which confirms the reliability of the elaborated model. Thermal plume dimensions were determined considering the isotherm of alteration equal to 1°C (isotherm 16°C) compared to the initial temperature of 15°C (natural groundwater temperature): L pl was calculated as the downstream distance (m) from the rejection well; W pl was defined as the maximum extension of the 16°C isotherm perpendicular to the groundwater flow direction (Figure 6).…”

Section: Numerical Simulation Resultssupporting

confidence: 79%

“…All CF1 system components affect the Turin shallow unconfined aquifer [12] (Figure 2). From a geological and hydrogeological point of view, the Politecnico di Torino test site is already well known, as it has been studied in previous works [5,13].…”

Section: Methodsmentioning

confidence: 99%

“…If there is a lack of groundwater flow, heat transport occurs only due to diffusion. Due to the fact that natural groundwater flow is present under most conditions, thermal conduction can be considered insignificant and be neglected [12].…”

Section: Methodsmentioning

confidence: 99%

“…By assuming, for the Turin saturated porous shallow aquifer, an effective porosity value of 0.20, Lo Russo et al [12] estimated an R factor equal to 2.4: natural groundwater velocity would therefore have 2.4 times the migration velocity of the thermal plume (approximately 1.30 mday −1 ).…”

Section: Methodsmentioning

confidence: 99%

“…Starting with hydrodynamic and thermal parameters assigned to unit 1 and unit 2 by Lo Russo et al [12] (see Table 2) and available hourly datasets of Q [m 3 day -1 ] and T [°C] measured continuously by probes fixed in Politecnico di Torino GWHP's injection well (P4), we performed a two-unit conceptual model simulation wherein hydrostratigraphic unit 1 represents the exploited unconfined alluvial aquifer (Figure 4).…”

Section: Feflow Model Setupmentioning

confidence: 99%

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Thermally Affected Zone (TAZ) Assessment in Open-Loop Low-Enthalpy Groundwater Heat Pump Systems (GWHPs): Potential of Analytical Solutions

et al. 2020

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Thermal perturbation produced in the subsurface by open-loop groundwater heat pump systems (GWHPs) must be predicted and constantly controlled, especially in the shallow aquifers of more densely urbanized areas, in order to guarantee plants’ long-term sustainable use and to avoid adverse effects on adjacent geothermal systems. Transient conditions in the flow dynamic can be successfully modelled by means of numerical modelling tools. However, for small plants in suitable hydrogeological systems, an alternative tool for predicting the thermally affected zone (TAZ) around the injection well can be found in analytical solutions for steady advective transport in a shallow aquifer. The validity of using steady analytical solutions to predict the TAZ development at the end of two different cooling seasons (2010 and 2016) was tested in the Politecnico di Torino GWHP system (NW Italy). When fixing the constant thermal difference (ΔT) between the injection and abstraction wells at 5°C, results revealed that a rather reliable assessment of the TAZ of Politecnico di Torino GWHPs, in Turin shallow aquifer, can be performed by plotting the cumulative distribution function of the injected discharge rate (Q) and setting 63% as a steady value.

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Section: Numerical Simulation Resultssupporting

confidence: 79%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Feflow Model Setupmentioning

confidence: 99%

See 3 more Smart Citations

Thermally Affected Zone (TAZ) Assessment in Open-Loop Low-Enthalpy Groundwater Heat Pump Systems (GWHPs): Potential of Analytical Solutions

et al. 2020

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Numerical simulation study of optimization and layout of groundwater source heat pump extraction well group based on FEFLOW

zhang,

Xu,

Pan

2024

Eighth International Conference on Energy System, Electricity, and Power (ESEP 2023)

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Groundwater source heat pumps, as a renewable energy technology, are widely used in refrigeration and heating of buildings in China. To improve the efficiency of heat pump systems, delaying thermal breakthrough has become a key focus. In this study, based on the groundwater source heat pump project at the Shenyang Institute of Instrument Science, a numerical model of the groundwater source heat pump extraction system was established using FEFLOW software. The research explores the changes in the underground temperature field in the presence of thermal breakthrough caused by the existing expanded water source heat pump and compares the degree of thermal breakthrough under different well layout methods at the Institute of Instrument Science. The results show that during system operation, the degree of thermal breakthrough is weakest and has the least impact when well layout option two is employed for extraction wells, and the well group layout method determines the distribution pattern of the underground temperature field.

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Proceedings of the IGSHPA Research Track 2022

2022

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This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doepublic-access-plan).

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Effectiveness of time-series analysis for thermal plume propagation assessment in an open-loop groundwater heat pump plant

Cited by 7 publications

References 30 publications

Thermally Affected Zone (TAZ) Assessment in Open-Loop Low-Enthalpy Groundwater Heat Pump Systems (GWHPs): Potential of Analytical Solutions

Thermally Affected Zone (TAZ) Assessment in Open-Loop Low-Enthalpy Groundwater Heat Pump Systems (GWHPs): Potential of Analytical Solutions

Numerical simulation study of optimization and layout of groundwater source heat pump extraction well group based on FEFLOW

Proceedings of the IGSHPA Research Track 2022

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