Lattenhofweg – Low temperature ice storage heating with thermal defrosting

A solar-ice heating system was designed and installed as part of a pilot and demonstration project. Since 2017, the heating system is supplying a residential and commercial building of 2050 m² of energy reference area with space heating and hot water. The main components of the heating system are 120 m² of unglazed, spectrally selective solar collectors, an ice storage tank with 210 m³ volume, and a two-stage brine-to-water heat pump with 45 kW thermal output (B0/W35). The heat exchangers in the ice storage tank are periodically de-iced in winter and could therefore be designed with a small transfer area.