There were problems before the overhaul: High humidity levels causing continuous condensation issues, negative pressures in the processing areas, process area temperatures that were near the limit of allowable specifications, and improper airflow patterns.

The first phase of the project involved a study of the plant processes and existing conditions. This included identifying all air systems, airflow patterns, current plant operation models, wash-down, and refrigeration systems. The resulting plan included adding desiccant DHMUA systems from Bry-Air, chillers, ductwork, and utilities as well as modifying existing MUA systems, exhaust systems, and air movement devices.

The plan implemented used desiccant DH systems and rental chillers. Local contractors installed the electrical, piping, ductwork, roofing, and rigging. Bry-Air provided design, support, supervision, start up, and commissioning.

How It Turned Out

Among the end results, listed by Bry-Air:

• Humidity levels are being maintained below condensation dew points at all ambient conditions.

• Process space temperatures have been lowered 5 to 10°F because of frost reduction on the refrigeration coils.

• Defrost cycles have been reduced by 50 to 70 percent, and in some cases could be completely eliminated.

• The process space is maintained with sufficient positive pressure to minimize or eliminate moisture and thermal infiltration.

• Internal process space airflow patterns are correct for proper cleanliness and quality requirements.

• Wash-down dry-out is quicker and less labor intensive.

• Process exhaust has been reduced by 60 percent with no negative effect on process quality.

• Floors dry quickly and stay dry during daily process cycle.

• Building structure has been dried out. The concrete is dry as is the roof structure.

For more information, go to www.bry-air.com.

Publication date: 10/22/2012