Feasibility study of an electrothermal energy storage in the city of Zurich

In this paper, a pilot project in the city of Zurich, which aims at demonstrating a new concept for electrothermal energy storage (ETES), is presented. ETES is a new type of large-scale electricity storage with potential power ratings in the range of tens to hundreds of MW and storage durations in the range of several hours. Therefore, the ETES is a promising technology to fill the gap between battery storage on the low voltage level and pumped-storage hydropower plants on the transmission level. In this paper a spectrum of possible applications of the ETES and interdependencies between them are analyzed with a focus on urban networks.