Version 1
: Received: 21 August 2023 / Approved: 22 August 2023 / Online: 23 August 2023 (07:49:20 CEST)
How to cite:
Aljundi, K.; Vieira, A.; Lapa, J.; Figueiredo, A.; Cardoso, R. Assessing the Impact of a Shallow Geothermal Systems Operation through Multi-Layer Temperature Monitoring under South European Climate. Preprints2023, 2023081584. https://doi.org/10.20944/preprints202308.1584.v1
Aljundi, K.; Vieira, A.; Lapa, J.; Figueiredo, A.; Cardoso, R. Assessing the Impact of a Shallow Geothermal Systems Operation through Multi-Layer Temperature Monitoring under South European Climate. Preprints 2023, 2023081584. https://doi.org/10.20944/preprints202308.1584.v1
Aljundi, K.; Vieira, A.; Lapa, J.; Figueiredo, A.; Cardoso, R. Assessing the Impact of a Shallow Geothermal Systems Operation through Multi-Layer Temperature Monitoring under South European Climate. Preprints2023, 2023081584. https://doi.org/10.20944/preprints202308.1584.v1
APA Style
Aljundi, K., Vieira, A., Lapa, J., Figueiredo, A., & Cardoso, R. (2023). Assessing the Impact of a Shallow Geothermal Systems Operation through Multi-Layer Temperature Monitoring under South European Climate. Preprints. https://doi.org/10.20944/preprints202308.1584.v1
Chicago/Turabian Style
Aljundi, K., António Figueiredo and Rafaela Cardoso. 2023 "Assessing the Impact of a Shallow Geothermal Systems Operation through Multi-Layer Temperature Monitoring under South European Climate" Preprints. https://doi.org/10.20944/preprints202308.1584.v1
Abstract
Shallow Geothermal Energy (SGE) exchanges heat with the ground. In continuous long-term operation, the initial temperature field can be disturbed, and subsurface thermal plumes can be developed. In this paper, the thermal impact of a SGE system under Mediterranean climate is handled. Temperature recordings from 104 thermal probes placed in depth along 15 monitoring boreholes are analysed. Those boreholes were drilled 1-2m from thermos-active boreholes of the case study system installed in a university building. The analysis handles one year of SGE system operation. Temperature depth profiles, reaching up to 140 m depth, were registered with a 10-minute time-step resulting in a large amount of data. Ground thermal conductivity was estimated experimentally and semi-empirically allowing to compute the initial undisturbed ground temperature profiles and compare it with the monitored values. Climate data was recorded by the university meteorological station. Globally, the measured and computed data were coherent and a non-negligible impact of the SGE system operation in the first year was observed. The building orientation as well as the nearby departments had significant impacts on shallow ground temperature. Maximum ground temperature changes, ranging from 2 to 3º C as observed in different boreholes indicating that the system is operating efficiently.
Keywords
Ground temperature distribution; Geothermal energy; Renewable sources; In-depth temperature acquisition; Mediterranean climate
Subject
Engineering, Civil Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
