Air curtains are local ventilation devices that are used in industrial buildings to reduce leakage of airflow through apertures in building enclosures and process equipment. Their operation is based on the damping effect of air jets that are supplied into the area of the open aperture. The advantages of air curtains include
• Improvement of working conditions near open apertures
• Reduction of heat (cold) consumption and electrical energy for heating (cooling) of buildings and process equipment
• Reduction of heat loss in the building by using overheated air from an upper zone of the room
• Reduced loss of usable working area near gates due to the ingress of outdoor air into the building
Traditional air curtains, which utilize only indoor air heated in the curtain heaters, are not always economical (due to considerable thermal energy consumption). Reduction of heat consumption is achieved by curtains that utilize unheated indoor or outdoor air, and also combined air curtains, which heat 3only part of the supplied air. Air curtains that use unheated air conserve 3070% of thermal energy.
Posted in INDUSTRIAL VENTILATION DESIGN GUIDEBOOK