Growing adoption of renewable energy makes shallow-geothermal systems viable for building cooling and water harvesting. This study develops a multi-physics finite- element model of a earth-to-air heat exchangers system (EAHX) that includes the soil–atmosphere energy balance. Calibrated with Typical Meteorological Year data and on-site measurements in Palermo, Italy, the model predicts that continuous summer operation of a 24 m horizontal exchanger buried 2.5 m deep cools. On average, this system can decrease inlet air temperature from 28.5 °C to 26.7 °C, supplying 476 W of cooling with negligible water-vapor condensation. Nighttime soil regeneration further lifts seasonal cooling up from 138 to 162 kWh and boosts overall efficiency by 17 % over baseline
Buscemi, A., Bonomolo, M., Baglivo, C., Guarino, S., Lo Brano, V., Congedo, P. (2025). A New Numerical Model for the Analysis of Geothermal Cooling Using EAHX Systems. In 2025 IEEE International Conference on Environment and Electrical Engineering and 2025 IEEE Industrial and Commercial Power Systems Europe, EEEIC / I and CPS Europe 2025C (pp. 1-6) [10.1109/EEEIC/ICPSEurope64998.2025.11169078].
A New Numerical Model for the Analysis of Geothermal Cooling Using EAHX Systems
Buscemi A.
;Bonomolo M.;Guarino S.;Lo Brano V.;
2025-01-01
Abstract
Growing adoption of renewable energy makes shallow-geothermal systems viable for building cooling and water harvesting. This study develops a multi-physics finite- element model of a earth-to-air heat exchangers system (EAHX) that includes the soil–atmosphere energy balance. Calibrated with Typical Meteorological Year data and on-site measurements in Palermo, Italy, the model predicts that continuous summer operation of a 24 m horizontal exchanger buried 2.5 m deep cools. On average, this system can decrease inlet air temperature from 28.5 °C to 26.7 °C, supplying 476 W of cooling with negligible water-vapor condensation. Nighttime soil regeneration further lifts seasonal cooling up from 138 to 162 kWh and boosts overall efficiency by 17 % over baseline
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