A system for use in a combined cycle or rankine cycle power plant using an air-cooled steam condenser is provided and includes a steam turbine from which first and second steam supplies are outputted at high and low respective pressures, an air-cooled condenser configured to fluidly receive and to air-cool at least the first steam supply via a supply of air, a cooling tower from which a first water supply is cycled, a chilling coil through which a second water supply water is cycled to thereby cool the supply of air, and a vapor-absorption-machine (VAM) configured to fluidly receive the second steam supply and the first water supply by which a refrigeration cycle is conducted to thereby cool the second water supply.