Basic thermodynamics doesn't prevent you from cooling something reversibly.
That said plenty of the steps involved here are likely not 100% efficient, and I'm somewhat unsure where they're recovering the energy involved in the gas-liquid phase-transition, if at all.
That said plenty of the steps involved here are likely not 100% efficient, and I'm somewhat unsure where they're recovering the energy involved in the gas-liquid phase-transition, if at all.