98-15: The New Wet/Dry Cooling Tower Without Finned Tube Dry SectionNWD uses the multi purpose fill, which is consisted of all wet and wet dry lanes. During the summer season, NWD can be used as all wet cooling tower by using wet dry lanes as wet sections, and during plume abatement (winter) season, NWD can be used as wet dry cooling tower by using wet dry lanes as dry sections which are acting similar to finned tube dry sections. The design criteria of NWD had been established by the experiment and a prototype NWD