Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1016/j.jhydrol.2021.126229
Title (Primary) Numerical investigation of a high temperature heat injection test
Author Heldt, S.; Wang, B.; Hu, L.; Hornbruch, G.; Lüders, K.; Werban, U. ORCID logo ; Bauer, S.
Journal Journal of Hydrology
Year 2021
Department MET
Volume 597
Page From art. 126229
Language englisch
Topic T5 Future Landscapes
Keywords high temperature heat injection test; numerical modeling; OpenGeoSys; induced convection; induced thermal impacts
Abstract High Temperature-Aquifer Thermal Energy Storage (HT-ATES) is a promising option to compensate for the seasonal mismatch between heating supply and demand in the heating sector based on renewable energies. To test and verify numerical and experimental methods for predicting HT-ATES thermo-hydraulic impacts, a small-scale heat injection test with injection temperatures of more than 70°C was conducted in a shallow aquifer featuring a dense temperature monitoring network. Prior to the heat injection test, the hydraulic and thermal properties of the field site were investigated and a predictive high-resolution numerical simulation model of the coupled thermo-hydraulic processes was derived based only on this a- priori information. The comparison of measured and predicted temperature breakthrough curves showed a good correspondence, suggesting that the model is able to predict the overall thermal behavior. The model predictions were most accurate for long-term and far-field temperature evolution, with lower accuracy for temperature peaks closer to the injection well. Density-driven buoyancy flow was identified as an active heat transport process, due to the relatively high vertical hydraulic conductivity. The numerical model, parameterized based only on a priori site investigation data, is shown suitable for predicting heat transport processes due to a high temperature heat injection, as well as the induced thermal impacts of an HT-ATES system.
Persistent UFZ Identifier
Heldt, S., Wang, B., Hu, L., Hornbruch, G., Lüders, K., Werban, U., Bauer, S. (2021):
Numerical investigation of a high temperature heat injection test
J. Hydrol. 597 , art. 126229