Background

ENERGY SAVING TECHNOLOGIES FOR INDUSTRIAL LAUNDRY DRYERS

WHAT DRYING IS ALL ABOUT

DRYING

Drying is a mass transfer process consisting of the removal of water or another solvent by evaporation from a solid, semi-solid or liquid. In the most common case, an air stream applies the heat by convection and carries away the vapor as humidity.

EVAPORATION

Evaporation is a type of vaporization of a liquid that occurs from the surface of a liquid into a gaseous phase that is not saturated with the evaporating substance. Two key parts to evaporation are heat and air movement.

AIR VOLUME / AIR STREAM

Constant Air Volume (CAV) is a type of heating, ventilating, and air-conditioning (HVAC) system. In a simple CAV system, the supply air flow rate is constant, but the supply air temperature is varied to meet the thermal loads of a space.

Variable Air Volume (VAV) is a type of heating, ventilating, and/or air-conditioning (HVAC) system. Unlike constant air volume (CAV) systems, which supply a constant airflow at a variable temperature, VAV systems vary the airflow at a constant temperature. The advantages of VAV systems over constant-volume systems include more precise temperature control, reduced compressor wear, lower energy consumption by system fans, less fan noise, and additional passive dehumidification.

The required energy to evaporate water is 620 kcal per kg of water, in order to evaporate water at 50°C and having it discharged in the exhaust air at 90°C. Any surplus volume of (hot) air being used and produced going beyond the 620kcal per kg of water in the dryer (laundry) is wasted energy. With our patented measuring systems we can at any point of the drying process tell the amount of wasted energy by measuring and analyzing the exhaust air.

>> Once this is done we understand your dryer. We can now react and regulate the airflow accordingly to its most efficient drying process.