94-15: Testing Procedures for Wet/Dry Plume Abatement Cooling TowersFor several years many cooling towers have been designed with a plume abatement device to reduce or eliminate plume formation under some weather conditions (mainly in winter). The combination wet dry tower produces the desirable invisible plume of the dry cooling tower while maintaining the high thermal efficiency of the wet cooling tower. This paper describes the testing of wet dry plume abatement cooling towers to verify performance under the