Munters - Dehumidification Principles

Dehumidification Principles & Benefits - Desiccant Wheel Low Temperature Operation

Munters Desiccant Rotor Technology

Munters desiccant dehumidifiers attract moisture from the air by creating an area of low vapour pressure at the surface of the desiccant. The pressure exerted by the water in the air is higher, so the water molecules move from the air to the desiccant and the air is dehumidified. Munters desiccant dehumidifiers make use of changing vapour pressures to dry air continuously in a repeating cycle described by the simple diagram below.

As the desiccant picks up moisture from the surrounding air, dry air is discharged to the process area and the reactivation air stream discharges the wet air outside.

Munters units can operate in a wide range of temperatures including a low temperatures down to -40 degrees C.

Munters PowerPurge - Save up to 35% Energy

PowerPurge works in a similar way to the standard desiccant rotor yet it has its own small fan that circulates the air between the two additional sectors. PowerPurge saves energy in two ways. The unique patented PowerPurge acts as an energy recovery system, collecting waste heat off of the hottest section of the desiccant wheel and using it to help with the regeneration by pre heating the coolest part of the rotor. This reduces the energy required for reactivation while also reducing the discharge temperature of the process air, resulting in lower energy costs for post cooling. PowerPurge can also save on first cost. Equipping a desiccant system with PowerPurge can reduce the size of the desiccant rotor without diminishing the dehumidification capacity.

Benefits of Munters PowerPurge Include:

• Reduced reactivation energy
• Reduced post cooling energy
• Energy savings
• Improved drying performance

Why Control Humidity?

Controlling relative humidity (RH) is essential in a wide range of industries and applications. As the diagram below demonstrates, many assets benefit from maintaining RH levels to between 30-50%.

Areas that are Impacted by Humidity Include:

• Energy consumption
• Microbiological growth
• Test equipment accuracy
• Electrical conductivity
• Degradation of buildings
• Product drying issues
• Refrigeration efficiency
• Aesthetic presentation
• Chemical reactions
• Moisture regain
• Effects on people

• Corrosion
• Lithium-ion manufacturing
• Data Centre cooling
• Ice build up
• Painting
• Lamination
• Spray painting
• Hygroscopic products
• Contamination
• Health & Safety
• Condensation