Unlike a cooling tower where process water is used as the energy transfer medium and is open to the atmosphere the coil inside a closed circuit cooler isolates the process fluid.
Closed circuit cooling tower vs open circuit cooling tower.
This tower has two separate fluid circuits one in which the fluid is recirculated on the outside of the second circuit which is a bundle of tubes through which the hot water is flowing.
Instead it circulates through a coil inside the cooling tower and water from a separate supply is sprinkled to achieve the evaporative cooling effect.
Addition of a heat exchanger pump piping etc to the open tower loop brings the initial cost much closer to that of the closed circuit tower system.
Choosing closed circuit cooling towers over this open tower heat exchanger combination may still be a better choice for the following reasons.
I have been recently asked to have a have an old bac cooling tower replaced with little to no down time to the factory.
Difference between closed and open circuit cooling towers.
An immediate open circuit cooling tower is an encased structure that conveys warm water over a maze like pressing or fill which gives an extended air water interface for warming of the air and dissipation to happen.
A cooling tower is a heat exchanger that uses the direct contact with the air to cool down water.
Closed circuit cooling towers.
Cooling towers with piping and plate heat exchanger also exist.
A closed circuit cooling tower or dry cooling tower involves no contact between the air and the fluid being cooled.
In a closed circuit cooler process fluid is circulated through coils within the unit.
Cooling towers winter operation free cooling 371 16 kb.
Equipment layout manual for cooling towers evaporative condensers closed circuit coolers.
Choosing closed circuit cooling towers over this open tower heat exchanger combination may still be a better choice for the following reasons.
The water is cooled as it falls through the fill and is then.
Addition of a heat exchanger pump piping etc to the open tower loop brings the initial cost much closer to that of the closed circuit tower system.
I am new to the industry so i have very limited knowledge of the subject.