It is based on a Brayton PTES concept demonstrated by Isentropic Inc., and consists of two insulated containers filled with gravel, and hot and cold vessels operating at different pressure levels.

Isentropic's Pumped Heat Electricity Storage (PHES) system is based on the First Ericsson cycle and uses a heat pump to store electricity in thermal form. The storage system uses two large ...

We solve the inviscid limit problem for the Navier–Stokes equations for one–dimensional, isentropic, compressible flow with shock data. We prove that the solution exists for all time, that it ...

Recent work giving a classification of kinematic and vorticity conservation laws of compressible fluid flow with barotropic equations of state (where pressure is a function only of the fluid density) ...

The ETI support will allow Isentropic to build a full-scale, grid-connected demonstrator of its pumped-heat electricity storage (PHES) device. The 1.5MW/6MWh PHES system will be wired into a ...