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The Drying Process

The Drying Process. Nigel Hewitt Technical Manager. Traditional Methods. Evaporation Air movement Air movers Injection Drying Systems Tenting. Traditional Methods. Dehumidifiers Domestic Refrigerant Commercial Refrigerant Low Grain Refrigerant Desiccants. Humidity. AIRFLOW. TEMP.

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The Drying Process

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  1. The Drying Process Nigel Hewitt Technical Manager

  2. Traditional Methods • Evaporation • Air movement • Air movers • Injection Drying Systems • Tenting

  3. Traditional Methods • Dehumidifiers • Domestic Refrigerant • Commercial Refrigerant • Low Grain Refrigerant • Desiccants

  4. Humidity AIRFLOW TEMP What Effects The Drying

  5. Surface Free Water Bound Water Humidity Airflow Temperature

  6. The Way Forward ? • Traditional • Dehumidification • New Technologies • Heat • Speed • Size • Cost

  7. Heat Drying Systems • Convection Drying Systems • Open type • Heats Air • Built in moisture evacuation • Hydronic • Heats Liquid • Glycol • Problems evacuating moisture

  8. How They Work • Vapour Pressure • High always goes to low (When it can) • Add heat to a wet surface increases its vapour pressure • A 10ºC rise in temperature doubles the rate of evaporation

  9. Heat Drying Systems • TES System • Dryair System • Aquadry

  10. Large Drying Systems • Large Desiccants • Corroventa • Arid Dry • Some add Heat • Concept

  11. New Technologies • Environmental Control Units • Heating • Dehumidification • Cooling

  12. Which Method Is Best • What are we trying to achieve • Are the new systems Best • Where do we use them • Do they have issues • Is there still a place for traditional methods

  13. Any Questions Thank You

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