A New Type in TRNSYS 18 for Simulation of Borehole Heat Exchangers Affected by Different Groundwater Flow Velocities

Matteo Antelmi (), Francesco Turrin, Andrea Zille and Roberto Fedrizzi
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Matteo Antelmi: Inewa s.r.l., NOI Techpark Südtirol/Alto Adige, Via Alessandro Volta 13, 39100 Bolzano, Italy
Francesco Turrin: EURAC Research, NOI Techpark Südtirol/Alto Adige, Via Alessandro Volta 13, 39100 Bolzano, Italy
Andrea Zille: Inewa s.r.l., NOI Techpark Südtirol/Alto Adige, Via Alessandro Volta 13, 39100 Bolzano, Italy
Roberto Fedrizzi: EURAC Research, NOI Techpark Südtirol/Alto Adige, Via Alessandro Volta 13, 39100 Bolzano, Italy

Energies, 2023, vol. 16, issue 3, 1-23

Abstract: Heating ventilating air-conditioning (HVAC) systems have been increasingly widespread in Italy: they can exploit renewable energies, are energy efficient systems, do not directly consume fossil fuels, and in the post-pandemic era, have also been subject to incentive processes by the Italian government. In South Tyrol, subject to harsh climates in both the winter and summer seasons, ground-source heat pump (GSHP) systems can be an excellent solution for the air conditioning of buildings. Unfortunately, too often, the design of HVAC systems with borehole heat exchangers (BHEs) is not adequate, and therefore, an innovative and expeditious numerical solution is proposed. A new numerical element (named Type285), written in Fortran code, was developed for TRNSYS 18 and able to implement the main features of BHEs and the surrounding aquifer. Type285 was compared with numerical models present in the literature (using hydrogeological software such as MODFLOW) and validated with the experimental data. The demonstration of the exchanged energy increase between the BHE and subsoil due to the increase in the groundwater flow velocity was carried out and evaluated. The choice to simulate BHE in TRNSYS using Type285 can be a fast and advantageous solution for HVAC system design.

Keywords: numerical modeling; TRNSYS; Type285; borehole heat exchanger; groundwater; HVAC system design (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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