Open Cooling Towers are used to dissipate heat from water cooled refrigeration, air-conditioning, and industrial process system. Open Cooling Towers can economically cool water to within 5℉ to 10℉ of the ambient wet bulb temperature or about 35℉ lower than Air Cooled systems of reasonable size.
The thermal performance of open Cooling Tower is defined by Range and Approach:
The thermal performance of an open Cooling Tower is affected by the entering air wet bulb temperature and relative humidity. The evaporation rate at typical design conditions is approximately 1% of the water flow for each 12.6℉ of water temperature range. In addition to water loss from evaporation, losses also occur because of liquid carryover into the discharge airstream (drift) and from blow down (to maintain acceptable water quality).
There are two main configurations of factory assembled open Cooling Towers:
There are two types Fan System in Open Cooling Tower: