Performance analysis of a Brayton Pumped Thermal Electricity Storage (PTES) with a liquid sensible heat storage

A pervasive Renewable Energy Source (RES) exploitation poses a wide range of issues to electric grids, which the enhancement grid flexibility may mitigate. There are several approaches improve flexibility, and significant help will come from efficient, reliable, durable cheap storage technologies. Inevitably, different technologies be needed since power energy spectra characterise RES issues. In category high capacity-to-power ratio technologies, Pumped Thermal Electricity Storage (PTES) is becoming more popular. Such technology aims at replacing Hydro (PHES), it suited for daily cyclic operation (load shifting). this paper, Brayton PTES with liquid sensible heat storages studied. Compared standard system equipped packed beds, allows straightforward state charge estimation, control and, potentially, better usage volume. Through parametric analysis involving main design specifications, performance assessed under realistic assumptions. The resulting figures provide an exhaustive characterisation achievable by system, useful fair comparison between other competing