DuPont has found many applications for its high-performance Hytrel polymer and has had to expand its production capacity to keep up with increasing demand. At its Cooper River plant in Charleston, South Carolina, the global chemical and plastics giant recently built a Hytrel production facility that uses Munters Wringer™ dehumidification system for drying.
DuPont sells Hytrel in the form of pellets as a raw material to OEMs, who then fabricate it into a multitude of consumer products. Mostly for the automotive industry, these range from constant-velocity joint boots to covers for air bags. Hytrel works well for parts like these because of its superior cold-weather properties. In its production process, DuPont goes to great lengths to dry the pellets to achieve the highest quality. To do this, they run fresh, hot air through them, and to dry the air, they use the roof-mounted Wringer™ dehumidification system.
The Wringer™ condenses moisture out of the air by cooling it with mechanical refrigeration to a dew point of 45ºF. And beyond that, outside air and cool air from the refrigeration coil pass through opposite sides of a counter-flow air-to-air heat exchanger. Heat recovery takes place to pre-cool the warm air coming in (94ºF is used as the summer design condition) to 67ºF, and it reheats the cool air back up to 83ºF for drying. This reduces the tonnage of the equipment required for cooling and dehumidification, and it saves energy as well.
About the Wringer™ & Wringer™ Plus
An energy saving, indoor air quality system specifically designed to address indoor air quality problems associated with mold and mildew. Controlling the humidity in your building can result in improved building efficiency, excellent indoor air quality and superior comfort. Wringer™ & Wringer™ Plus achieve this with 100% outdoor air yet require 30% less energy than conventional systems. Wringer Plus™ goes a step further, offering humidity control and winter heat recovery in the same package. The Wringer™ can be used on new or existing buildings and complies with ASHRAE Standard 62 and 90.1.
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