Evolution models of Uranus. Each row shows results for a different temperature offset applied to the hydrogen-water phase diagram (T_offset = 0, 600 or 1000 K.) Left panels : temperature-pressure profiles at different ages. Phase curves are shown with grey to black lines for water mass fractions of 0.92 to 0. Grey-shaded areas mark demixing regions. Center panels : water mass fraction as a function of normalized mass, colored by age. Right panels : radius and effective temperature as a function of age. The horizontal dashed lines show the measured values.