... exploiting RES (solar and geothermal) in an efficient manner coupled with enhanced PCM borehole heat exchangers (BHEs) that will take advantage of the increased underground thermal storage and maximize the efficiency of the ground coupled heat pumps (GCHP). The two TES tanks developed within TESSe2b project will be integrated with different PCM materials; (i) enhanced paraffin PCM, (ii) salt-hydr ...