Benchmark study of simulators for thermo-hydraulic modelling of low enthalpy geothermal processes

Mindel, Julian; Alt‐Epping, Peter; Landes, Antoine Armandine Les; Beernink, Stijn; Birdsell, Daniel Traver; Bloemendal, Martin; Hamm, Virginie; López, Simón; Maragna, Charles; Nielsen, Carsten M.; Olivella, S.; Perreaux, Marc; Saaltink, Maarten W.; Saar, Martin O.; Heuvel, Daniela Van den; Vidal, Rubén; Driesner, Thomas

doi:10.1016/j.geothermics.2021.102130

Cited by 7 publications

(6 citation statements)

References 24 publications

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“…Figure 4a shows the temperature vs. time comparison for the first probe, located at r = 1 m. Overall, the simulation results of the Modelica model (named IBPSA_Mod in the graph) are in good agreement with the other simulators. As stated in Mindel et al (2021), the discrepancy between the initial value of temperature for Tough3, MOOSE and the other simulators is due to the different injection conditions. These simulators do not use an enthalpy source-type or a Neuman boundary condition but they use a Dirichlet boundary condition.…”

Section: Results Comparisonmentioning

confidence: 96%

“…However, mea- suring an ATES system, retrieving data, and analyzing them is a complex and costly task, and we had no such data available. Therefore, we conducted an inter-model comparison, using a simulation test suite developed by Mindel et al (2021). This test suite comprises a set of cases to assess the thermo-hydraulic modelling capabilities of various geothermal simulators.…”

Section: Simulation Setupmentioning

confidence: 99%

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Low-order aquifer thermal energy storage model for geothermal system simulation

Maccarini,

Wetter,

Varesano

et al. 2023

Linköping Electronic Conference Proceedings

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This paper presents a low order aquifer thermal energy storage (ATES) model for simulation of combined subsurface and above-surface energy systems. The model is included in the Modelica IBPSA Library, which is a free open-source library with basic models for building and district energy and control systems. The model uses a lumped-component method, in which the transient conductive-convective heat and mass transfer equation is radially discretized. To verify the accuracy of the model, we present an intra-model comparison from a simulation test suite. Results show that the Modelica ATES model is in good agreement, with a normalized mean bias error for yearly variation of aquifer temperatures of 1.6×10−2 and 9×10−5 at 1 m and 10 m distance from the well.

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Section: Results Comparisonmentioning

confidence: 96%

Section: Simulation Setupmentioning

confidence: 99%

Low-order aquifer thermal energy storage model for geothermal system simulation

Maccarini,

Wetter,

Varesano

et al. 2023

Linköping Electronic Conference Proceedings

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“…In the study area, the USM consists of horizontal layers of sandstones embedded within marls and claystones (Keller 1992). Quaternary unconsolidated deposits of 150 m thickness overlay the USM (Driesner 2021).…”

Section: Description Of the Bern Projectmentioning

confidence: 99%

“…The heat will be stored in a series of confined aquifers between 200 to 500 m below the surface. The mean geothermal gradient is 3 K/100 m, which make the temperature of the aquifer to approximately 20 °C (Driesner 2021).…”

Section: Description Of the Bern Projectmentioning

confidence: 99%

“…Despite the large number of examples in the literature of THM modelling applied to geoengineering facilities (e.g., Rutqvist et al 2005;Vilarrasa et al 2014;Toprak et al 2016), there are only few applications to UTES, such as that of Park et al 2016 who studied the THM behaviour of a high-temperature thermal energy storage cavern. In HT-ATES, there are many studies on the TH behaviour of the subsurface (e.g., Jongchan et al 2010;Mindel et al 2021) and only one simulates the HM behaviour of the underground focusing on the deformation at the ground surface (Birdsell and Saar 2021). There is a THM simulation of HT-ATES, but it does not consider uplift (Jin et al 2022).…”

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confidence: 99%

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Heat storage efficiency, ground surface uplift and thermo-hydro-mechanical phenomena for high-temperature aquifer thermal energy storage

et al. 2022

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High-temperature aquifer thermal energy storage (HT-ATES) systems can help in balancing energy demand and supply for better use of infrastructures and resources. The aim of these systems is to store high amounts of heat to be reused later. HT-ATES requires addressing problems such as variations of the properties of the aquifer, thermal losses and the uplift of the surface. Coupled thermo-hydro-mechanical (THM) modelling is a good tool to analyse the viability and cost effectiveness of HT-ATES systems and to understand the interaction of processes, such as heat flux, groundwater flow and ground deformation. The main problem of this modelling is its high computational cost. We propose a dimensional and numerical analysis of the thermo-hydro-mechanical behaviour of a pilot HT-ATES. The results of this study have provided information about the dominant thermo-hydraulic fluxes, evolution of the energy efficiency of the system and the role of the hydraulic and thermal loads generated by the injection and extraction of hot water.

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