DehumidificationDehumidification

Justin DunnahooJustin Dunnahoo

UsesUses

Humid air can lead to mold and mildew Humid air is preferred by many insects

Moths, fleas, cockroaches, etc Ice Arenas

More comfortable environment Reduce load on ice making equipment

Humidity control in industrial climatic chambers

Humid air can lead to mold and mildew Humid air is preferred by many insects

Moths, fleas, cockroaches, etc Ice Arenas

More comfortable environment Reduce load on ice making equipment

Humidity control in industrial climatic chambers

ProcessesProcesses

Mechanical/Refrigerative Desiccative Electronic Air Conditioners Makeshift

Mechanical/Refrigerative Desiccative Electronic Air Conditioners Makeshift

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Mechanical/Refrigerative Dehumidification

Mechanical/Refrigerative Dehumidification

Most Common Draws moist air over refrigerated coil using a small fan Saturation Vapor Pressure decreases with the decreasing

temperature Moisture in air condenses and drips into collection bucket Air is then reheated by warmer part of refrigeration coil Most effective in high ambient and RH>45%

Most Common Draws moist air over refrigerated coil using a small fan Saturation Vapor Pressure decreases with the decreasing

temperature Moisture in air condenses and drips into collection bucket Air is then reheated by warmer part of refrigeration coil Most effective in high ambient and RH>45%

QuickTime™ and a decompressor

are needed to see this picture.

QuickTime™ and a decompressor

are needed to see this picture.

Desiccative Dehumidification

Desiccative Dehumidification

Employs a desiccant material to produce a dehumidification effect

Desiccant- a substance with the ability to attract moisture from the environment to induce dryness Ex: Silica Gel

More effective in low temps with low humidity

Process Expose desiccant to high humidity air

stream and allow it to absorb moisture Then expose to low humidity

(reactivation) air stream to draw out retained moisture

Heat the reactivation air stream to remove moisture or have it exit the system

Employs a desiccant material to produce a dehumidification effect

Desiccant- a substance with the ability to attract moisture from the environment to induce dryness Ex: Silica Gel

More effective in low temps with low humidity

Process Expose desiccant to high humidity air

stream and allow it to absorb moisture Then expose to low humidity

(reactivation) air stream to draw out retained moisture

Heat the reactivation air stream to remove moisture or have it exit the system

QuickTime™ and a decompressor

are needed to see this picture.

Other Dehumidification Processes

Other Dehumidification Processes

Electronic Use a heat pump to create a cool

surface for condensation Very quiet (no compressor) Mainly small dehumidifiers

Air Conditioners Automatically accumulate water

when they cool the air Moisture removed through drain to

outside Makeshift

Window AC units can be reversed to send exhaust back into room, warmer and less humid

Electronic Use a heat pump to create a cool

surface for condensation Very quiet (no compressor) Mainly small dehumidifiers

Air Conditioners Automatically accumulate water

when they cool the air Moisture removed through drain to

outside Makeshift

Window AC units can be reversed to send exhaust back into room, warmer and less humid

QuickTime™ and a decompressor

are needed to see this picture.

Questions?Questions?

QuickTime™ and a decompressor

are needed to see this picture.