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UID:pretalx-flowpath-2025-FTUTFX@talks.staging.osgeo.org
DTSTART;TZID=CET:20250611T175000
DTEND;TZID=CET:20250611T180000
DESCRIPTION:The use of low-enthalpy geothermal energy through vertical bore
 hole heat exchangers (BHE) represents a low-impact solution\, based on a r
 enewable energy source that is widespread worldwide. This study focuses on
  studying the most significant parameters that influence the energy perfor
 mances and the environmental impact of vertical borehole heat exchangers (
 BHE) installed in different geological contexts. \nThe aim of the study is
  to develop a design guide for designers indicating the optimal distances 
 between a row of BHE arranged perpendicular to groundwater flow and varyin
 g operational condition of the energy system\, geometry of BHE and the hyd
 rogeological parameters of the aquifer. The study was performed through th
 e implementation of synthetic numerical models into MODFLOW-USG code. The 
 vertical U-shape pipes of BHE were implemented into the model adapting the
  Connected Linear Network (CLN) Package\, such as discussed in Antelmi et 
 al.\, 2021. Specific flow and thermal boundary conditions were introduced 
 to reproduce the real operation of a vertical BHE and various physical and
  hydrogeological properties of the aquifer were set to simulate a wide ran
 ge of porous materials characteristics (from clay to sand and gravel).\nSt
 arting from numerical models representing a single BHE\, having the aim to
  determine operating conditions without interferences\, different borefiel
 d of 3 and 5 BHE were implemented to study in detail how their closeness c
 an influence the energy performance of the central BHE and the extension o
 f the thermal plume. Fixed a threshold (95%) of acceptance related to the 
 heat rate exchanged reduction between BHE and surrounding subsoil\, the op
 timal distances between geothermal exchangers were carried out for each pa
 rameter combination: results show an optimal distance ranging from 8 meter
  for fine materials and low groundwater flow velocity to 2 meters for coar
 se materials and higher groundwater flow velocity.
DTSTAMP:20260427T201517Z
LOCATION:Room R3
SUMMARY:The influence of the hydrogeological setting for the definition of 
 the optimal spacing between vertical borehole heat exchangers - Daniele Pr
 evitali
URL:https://talks.staging.osgeo.org/flowpath-2025/talk/FTUTFX/
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