Industrial cooling water systems are key enablers of unit processes. Maximizing cooling system
performance serves to realize primary business goals such as production throughput and yield, energy
and water conservation, capital asset preservation, environmental compliance and the protection of
human health. The management of corrosion is inextricably linked to successful control of scale and
deposits, as well as microbiological activity.
Throughout the past 30 years, industry has benefited from a steady progression of developments
technological advancements in the automation and control of critical water system parameters. Today,
measurement of all three crucial elements of effective cooling water treatment (i.e. corrosion, deposition
and microbiological activity) is possible with a single instrument platform that is reliable and costeffective.
In addition, that same platform is capable of controlling critical variables for corrosion and
deposit control that takes full advantage of these new measurement capabilities.
This paper discusses the most recent and complimentary developments in automation and process
control technologies, in both on-line and off-line modes, and the convergence of their development with
the changing needs and challenges of operators of industrial cooling water systems. Case reviews of
real-world field applications of on-line technologies in practical, every-day situations also are presented.
Keywords: Automation, deposit control, corrosion control, biological control, orthophosphate, free
chlorine, polymer, phosphate, cooling water, cooling tower, direct measurement, and stressed water
condition.