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

Publication Type

Conference Paper

Date Published

10/2023

Authors

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

Abstract

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.

Journal

15th International Modelica Conference

Year of Publication

2023