The influence of ground heat exchanger installation
on the efficiency of residential geothermal ventilation systems
Vadym Matusevych¹ (orcid id: 0000-0001-9339-1423)
Olena Savchenko¹* (orcid id: 0000-0003-3767-380X)
Orest Vozniak¹ (orcid id: 0000-0002-6431-088X)
Anna Lis² (orcid id: 0000-0001-9497-5754)
¹ Lviv Polytechnic National University, Ukraine
² Czestochowa University of Technology, Poland
DOI: 10.17512/bozpe.2025.14.18
Article (PDF)
KEYWORDS
geothermal ventilation system, ground heat exchanger, low-potential ground energy, heat
exchanger installation scheme, thermal energy
ABSTRACT
Geothermal ventilation is used for preheating outdoor air in the cold season and pre-cooling
it in the warm season using a mechanical ventilation system. It allows the building to save on
traditional fuels when preheating or cooling outdoor supplied air by using low-potential soil
heat. Air and soil exchange heat through the walls of the ground heat exchanger. Ground heat
exchangers for geothermal ventilation can be installed in the ground according to a ring
scheme, a Tichelmann scheme, or with a coil scheme. This article focuses on the geothermal
ventilation system of a residential building using two methods of installing ground heat
exchangers. The thermal energy performance of ground heat exchangers when laid in a coil
format and in the Tichelmann scheme was compared. The operation of the variants was simulated
using REHAU-GAHE software. As the calculation results showed, the thermal energy
performance of the system for the two types of installation is approximately the same, since
the program is set to maintain the minimum temperature at the outlet of the ground heat
exchanger. For example, the amount of heat received per year for a ground heat exchanger
installed in a coil format is 7310.22 kWh/year, and for a ground heat exchanger installed
according to the Tichelmann scheme – 7430.35 kWh/year. As for the geometric dimensions,
the results obtained are significantly different. Thus, for an installation depth of 2.5 m when
installed in a coil format, the pipeline diameter was 500 mm and the length was 168 m,
and when installed according to the Tichelmann scheme – the diameter was 250 mm and
the length was 403 m.
Politechnika Częstochowska uczelnią dostępną.
