The storage at the University of Bayreuth acts as heat source for a heat pump and is regenerated by the cooling water network delivering the waste heat, which can also be used as a direct source for the heat pump. Therefore, for the first time, a detailed numerical model of such a system is developed, validated and compared to long term measured data of a 500 m³ setup. In order to design, evaluate and optimize such systems, analysis of its behavior by means of variational calculations are essential, which requires an adaptable model that is thoroughly validated. However, investigations of ice energy storage systems for nonresidential buildings to use waste heat instead of solar benefit are missing. Several studies examine the suitability for residential buildings in combination with solar thermal power. Ice energy storage systems, as interface between the time-shifted occurring heat and cold demand of nonresidential buildings, are a promising technology to use waste heat arising inside buildings.
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