Sometimes, cooling tower preventive maintenance is not enough, or perhaps has been overlooked too long, and the cooling tower begins to hinder the process more than help it. In these cases, replacing the cooling tower may become the most practical solution.
Once again, think of a cooling tower like a vehicle. When
spending more than a couple of thousand dollars a year maintaining a car, it
may make sense to weigh that expense against spending a couple of thousand
dollars a year in payments for a brand-new car. The same consideration applies
to cooling towers, particularly the old, metal-clad designs that require, and
are very sensitive to, frequent chemical treatments, patching and welding.
If this is the case, consider a cooling tower with a
seamless, engineered-polyethylene shell. This type of construction offers a
much lower cost of ownership because overall maintenance is minimal and the
tower shell does not require preventive maintenance, nor does it ever have to
be relined or repaired.
However, even a cooling tower as durable as these seamless
engineered plastic models should receive some inspection and maintenance. PVC
fill or packing material must still be cleaned, louvers should be inspected and
cleaned for optimum air flow and to minimize the need for the electric fan, and
drift eliminators should be inspected to ensure they are operational. Tackling
these simple steps on a routine basis will go a long way toward avoiding
cooling tower "fatigue" for many years to come in a cooling tower