THERMAL ENERGY STORAGE MEDIUM WITH ALUMINUM-ZINC ALLOY AND USE OF THE THERMAL ENERGY STORAGE MEDIUM

摘要

A thermal energy storage medium is provided comprising at least one phase change material with an aluminum-zinc alloy. In a preferred embodiment a percentage by weight of aluminum is 4.94 wt% and the percentage of weight of zinc is 95.06 wt%.The aluminum-zinc ally is called Zamak. The heat storage medium has excellent physical characteristics. It has appropriate melting and solidification temperatures as well as an appropriate heat of fusion. It has a high density. As a result relatively low costs per thermal energy storage volume capacity are available. Additionally degradation problems and corrosion with container materials play nearly no role. The use of such the thermal storage medium relates to a solar power plant for converting solar energy into electrical energy.