Research includes drilling of experimental boreholes that will be used for measuring ground thermal response (TRT – thermal response test). Along with drilling procedure, the geological supervision will be carried with soil sampling and soil properties determination.

Research will be carried out on eight different locations in Republic of Croatia and they include cities of Osijek, Požega, Čakovec, Zagreb, Gospić, Poreč, Zadar and Dugopolje. The choice of locations was made based on recommendations of Croatian Geological Survey in order to cover different typical geological soil composition on the territory of Croatia. In boreholes, 100 and 150 meters deep, double U-pipe will be installed. Such ground heat exchangers represent renewable energy sources and sinks that can be used for heating and cooling when coupled with heat pumps.

The results obtained by measurements are to be used for creating map of geothermal potential variation (“mapping” process)

All research locations will be equipped with new equipment that will remain in possession of local partners.