The performance curves are obtained from the EnergyPlus example idf file: 5ZoneDetailedIceStorage.idf.
record EnergyPlus = Buildings.Fluid.Storage.Ice.Data.Tank.Generic(coeCha = {0.0, 0.09, -0.15, 0.612, -0.324, -0.216}, dtCha = 3600, coeDisCha = {0.0, 0.09, -0.15, 0.612, -0.324, -0.216}, dtDisCha = 3600);