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

Conference · Sun Oct 01 04:00:00 EDT 2023

DOI:https://doi.org/10.20357/B7CK54· OSTI ID:2294044

Maccarini, Alessandro; Wetter, Michael; Varesano, Davide; Bloemendal, Martin; Afshari, Alireza; Zarrella, Angelo

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 inter-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.

• Research Organization: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Building Technologies Office (EE-5B)
• DOE Contract Number: AC02-05CH11231
• OSTI ID: 2294044
• Country of Publication: United States
• Language: English