Dehumidifying Makeup Air Boosts Urethane Foam Quality
The plant's chief engineer brought in NuTemp, Chicago, to learn that the production process needed temperature and humidity control of makeup air fed to the manufacturing area. NuTemp's solution was a combination of rental mechanical refrigeration and rental desiccant dehumidification systems that would regulate makeup air conditions.
The solution involved condensing moisture from the air via an air-handling unit, using chilled water as the media. Then a rental desiccant dehumidifier directed the air to an air-handling unit again for tempering prior to injecting it into the manufacturing area.
After NuTemp engineers lowered the humidity in the automotive parts plant, the airflow at 20,000 cfm had a temperature drop of 25oF, from 95oF to 70oF (35oC to 21oC). Relative humidity decreased from 47 percent to 27 percent. After the first day of actual production following the installation of the rental equipment, there was improvement in quality. Product defects decreased by 20 percent, according to NuTemp.
"We were happy with the fact that we could create a feasible solution for this client," said Melchor Isobal, international sales manager for NuTemp. "The problem of excessive humidity is a typical one at many plants."