Air Curtain


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air curtain

[′er ‚kərt·ən]
(mechanical engineering)
A stream of high-velocity temperature-controlled air which is directed downward across an opening; it excludes insects, exterior drafts, and so forth, prevents the transfer of heat across it, and permits air-conditioning of a space with an open entrance.

Air Curtain

 

a device in a local forced ventilation system for preventing the entry of cold outside air into an industrial space through open doors (or gateways) in industrial and commercial buildings. It consists of ducts with linear slots through which air is delivered by a fan with a velocity of 8-20 m/sec at an angle of 30°-45° to the face of the opening, against the stream of air tending to penetrate into the premises. Air curtains are also used at the enclosure openings of industrial equipment (to prevent the escape of hot, contaminated air into a room space) and in other cases where it is necessary to block off a current of air through an opening. The air supplied by the fan is often preheated; this type of unit (when used with an air preheater) is called a heated air curtain.

air curtain

air curtain or air door
A stream of high-velocity temperature-controlled air which is directed downward, across an opening; excludes insects, exterior drafts, etc.; prevents the transfer of heat across it, and makes it possible to air-condition a space having an open entrance; used in exterior doors, on loading platforms, etc.
References in periodicals archive ?
store has installed air curtains, dedicated outdoor air dehumidification, high-efficiency rooftop HVAC units, CO2 refrigeration systems, a green roof and energy recovery equipment, all of which were successfully tested in previous stores.
Therefore, to alter each variable, a modular, versatile, flexible experimental equipment referred to as the Proof-Of-Concept Air Curtain (POCAC), or simulator, was designed and constructed for conducting the infiltration and mass flow rate tests by tracer gas.
Although the air curtain cannot be used to improve IAQ or meet ventilation requirements, it offers benefits related to energy consumption and thermal comfort.
By using two complete units, they could test two different groups of air curtains at the same time.
In addition the Air Curtain Burners are environmentally cleaner than the grinding and trucking operation as proven again with the testing completed by the USEPA and USACE at Floyd Bennett Field.
The Walk-In cooler Efficiency Kit includes a pre-wired control/load center with enclosure, magnetic reed on/off door switch and a K-Zone air curtain that's engineered specifically for walk-in coolers/freezers, according to company officials.
The standard model is the same width as the market-leading Husky C5 but in a convenient, open design with double air curtain and two illuminated branding areas.
The sensor has an integral air curtain around the external measurement window, which is designed to eliminate the accumulation of contaminants and condensation from the optical path.
Simulation was carried by varying the various parameters including the flow rates and keeping the interest in maintaining an unbroken air curtain.
For the horizontal refrigerated display cases, the simulation by Cui and Wang (2004) is the only one that is in line with measured temperature profile at the outlet of the air curtain.
Biddle--the company whose research led to a breakthrough in air curtain technology--has launched a short film to highlight the problems associated with inefficient barriers between internal and external environments in coldstores.