FBH Closed Circuit Cooling Tower
FBH Closed Circuit Cooling Tower is a kind of high-efficient heat exchange equipment which comes into being on the basis of absorbing the most advanced foreign heat-exchange technology.
Working fluid is flowing inside of the coils, which is enwrapped by spray water on the outside. The heat of water is transferred by coil and become the saturated vapor when meet the water and air. The heat is exhausted out of the tower by the fan; water is collected back to the bottom tank. The spray water is cooled down via PVC radiation fin in the process of circulation, and flows in the same direction with the fresh wind. The coil mainly takes sensible heat travel style. And this will apply especially to dealing with high temperature fluid.
The cooled circulating water increases the temperature difference between the water and the warm process fluid, which results in a reduced coil size, fewer coil connections, and reduced weights. This feature further reduces the tendency to form scale on the coil since cooler water offers higher solubility for scale producing.
Parallel air and water paths minimize scale-producing dry spots that may be found on the bottom of tubes in conventional units.
The coil section rejects heat through both evaporative cooling using the fresh air stream and, more significantly through sensible cooling using the pre-cooled circulating spray water. Reducing evaporative cooling from coils helps to minimize the propensity to form scale on the coil surface.
The circulating spray water falls from the coil to a wet deck surface section where it is cooled by second fresh air stream using both evaporative and sensible heat transfer processes.
Water is pumped over the evaporative coil at 6.8l/m2 of coil face area to ensure continuous flooding of the primary heat transfer surface which enhances heat transfer efficiency and minimizes fouling and scale formation.