Abstract: Technologies are described for a recirculating evaporative air conditioning system. A pre-cooling evaporator may be coupled to a pre-cooling compressor and a pre-cooling condenser by a first closed refrigerant loop. A post-cooling evaporator may be coupled to a post-cooling compressor and a post-cooling condenser by a second closed refrigerant loop. A blower can draw ambient air through the pre-cooling evaporator and then blow the air out through the post-cooling evaporator. A discharge plenum can collect the air blown out through the post-cooling evaporator. A recirculation duct can recirculate a portion of the air collected at the discharge plenum back into the pre-cooling evaporator, into the post-cooling evaporator, or into any ducts or plenums associated therewith. A discharge duct can conduct a portion of the air collected at the discharge plenum into an aircraft, electrical equipment, an aircraft ground power unit, a passenger bridge, or other such aircraft ground support systems.