Evaluating the cooling potential of a geothermal-assisted ventilation system for multi-family dwellings in the Scandinavian climate

In recent years, the increasing occurrence of heatwaves raises cooling need residential buildings in Scandinavian countries, which are traditionally not equipped with active systems. Indoor overheating caused by such leads to severe consequences for occupants, especially kids and seniors. Efficient economical solutions urgently needed cope frequent heatwaves. The present study investigated novel usage geothermal-assisted mechanical ventilation heat recovery (GEO-MVHR) system purposes typical Swedish multi-family dwellings. potential its contributions thermal comfort were evaluated. Dynamic simulations conducted assess system's performance under two climate scenarios: 2018 representing an extreme year excessively hot summer a meteorological year. GEO-MVHR shows great mitigating indoor improved comfort. A airflow rate 0.50–0.70 l/s/m2 is suggested dwellings maximize system. operative temperature could be reduced up 3 °C operating cooling. Modulating supply air based on conditions recommended, as it advantage avoiding unnecessary overcooling energy saving.