Since its inception in 1959, the CRWS treatment plant has been noted as one of the largest and best-operated plants in Texas. Growth in capacity and facilities also increases the quantities of hydrogen sulfide (H2S), a very poisonous, corrosive, and invisible gas. Heavier than air and settling over most of the plant, although diluted by the atmosphere, it is responsible for causing the deterioration of steel, copper, tin, and similar metals.

Solving the problem included replacing the refrigerant air systems with chilled-water systems and installing carbon-based filters in the return-airstream to remove (scrub) hydrogen sulfide (H2S) from each building’s air.

Central Chilled Water Plant (CWP) equipment and systems:

• Three 400-ton chillers
• Three condenser water pumps
• Three chilled water pumps
• Three redundant chilled water pumps
• Chilled water supply and return pipeline distribution system
• Air scrubbing filter
• HMI and automated controls
• Supply and return water uses the plants internal non-potablesystem.