Dehumidification in Plastics Production

Selecting an industrial dehumidifier starts with an accurate moisture load calculation. This episode walks through the seven moisture sources, a worked infiltration example and how the target dew point drives the choice of technology.

We usually judge indoor comfort by temperature alone, yet relative humidity shapes our health, productivity and the life of the building just as much. This episode uses the Sterling chart to cover the effects of low and high humidity, the ideal range and how humidity is controlled in both directions.

There are three main technologies for industrial dehumidification: desiccant rotor, condensing and pool units. This episode compares their operating principles, achievable dew points, strengths and limits, and shows how the target dew point and the ambient temperature drive the right choice.

Selecting an industrial dehumidifier is never just a single capacity figure. This episode covers eight criteria, from target relative humidity and dew point, moisture load and technology to reactivation energy, casing, automation and service, and a five-step decision process.

In winter, heated indoor air can drop below 15% relative humidity. This episode calculates the humidification load step by step from the absolute humidity difference and the volume of air entering the space, works through two examples with Türkiye climate data, and covers economisers, unit selection and the energy budget.

In an indoor pool, the heated water surface evaporates all day; this evaporation cannot be prevented, only controlled. This episode calculates evaporation with the VDI 2089 formula, works through a 32 m² villa pool example, and covers hall conditions, chloramines and corrosion, unit selection, air distribution and maintenance.

The psychrometric calculator is a free engineering tool that works out every property of moist air from two known values. This episode shows, step by step, choosing the location and altitude, entering two known values, saving and comparing summer and winter conditions, the psychrometric chart, the comparison table and the PDF report.

The cooling coil calculator shows how much heat a coil in an air handling unit removes and how much water condenses out of the air. This episode works through an air handler in summer step by step, covering total, sensible and latent capacity, the SHR, the condensate rate, scenario comparison and the cooling process on the psychrometric chart.

In winter, cold fresh air mixes with return air in an air handling unit, and the mix is then heated in the heating coil. This episode calculates both steps in turn with the air mixing and heating coil tools, showing mixing by mass, the heating capacity, the hot water flow and why relative humidity falls when air is heated.