Apparatus for control of hard water scale deposition in cooling

Details Apparatus for control of hard water scale deposition in cooling Apparatus for control of hard water scale deposition in cooling

1990-11-16

1992-04-07

Hepperle, Stephen M.

Fluid handling

Self-proportioning or correlating systems

Mixture condition maintaining or sensing

307118, 340619, G05D 1113

Patent

active

051018519

ABSTRACT:
Disclosed is a method and apparatus for preventing or minimizing scale deposition from hard water onto heat transfer surfaces in atmospheric cooling towers, such as those used in air conditioning and refrigeration systems, where evaporative cooling of water provides the necessary heat sink to the atmosphere. An electrical/mechanical control system responsive to changes in density of the water in the evaporative cooling system operates to permit discharge of water containing dissolved and suspended solids from the system when its density reaches a predetermined maximum value and to discontinue the discharge of cooling system water when its density reaches a predetermined minimum value. Water drained from the cooling system is replaced by fresh water, preferably by water containing chemical additives to increase solubility of hard water minerals in the cooling water.

REFERENCES:
patent: 2543522 (1951-02-01), Cohen
patent: 4586033 (1986-04-01), Andrejasich
patent: 4982755 (1991-01-01), Roberts et al.

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