© Illustration | ebm-papst, Gernot Walter

Warm welcome

Teddington air curtains keep the cold air out and energy consump­tion low

Money can be made from hot air. In the well-clima­tised sales room of a super­market, customers demon­strate greater dispo­si­tion to spend money and the staff absentee rate drops consid­er­ably. But if the doors are frequently opened, the warm air needs to be contin­u­ally replen­ished to main­tain the feel-good climate. This is because the natural exchange of air causes the warm air to flow out of the upper section of the door and cold air to flow in. A door air curtain system stops this unde­sir­able exchange with a flow of warm air that helps to save up to 80 percent in energy costs.

Saving with pres­sure

The company Teddington from West­er­wald, Germany, employs a pres­sure-chamber nozzle set in its energy-effi­cient Evol­vent air curtain systems. In the pres­sure chamber, the airflow is compressed, distrib­uted evenly via convex nozzle cheeks and emitted as an accel­er­ated stream. This forms a homo­ge­neous curtain over the complete blow-out width, which screens both the room and high door open­ings from the outside air. Compared to a conven­tional laminar system, the Evol­vent pres­sure-chamber nozzle set offered by Teddington requires less air and offers energy savings of up to 40 percent – the unit’s own require­ment for heat energy. The Evol­vent nozzle devices offer this benefit for all appli­ca­tions.
And these are extremely varied: From screening air-condi­tioned rooms, through “locking in” unpleasant smells, such as those encoun­tered in waste disposal sites, to screening large indus­trial portals. While a constant air curtain that is as quiet and conve­nient as possible is required in the entrance area of a depart­ment store, a four metre high portal to a factory hall requires a high output. ebm-papst is the R&D partner of Teddington for opti­mising the air-side device output. “We are respon­sible for every­thing that moves the air,” explains Winfried Schaefer, regional sales Manager, “and we supply a wide range of different prod­ucts, from the axial fan, through dual inlet centrifugal blowers to back­ward curved centrifugal blowers.” The different perfor­mance require­ments of the Teddington systems are covered in two ways: by the different sizes of the various prod­ucts and by the number of blowers used in the system. The systems are modular in their design so that several blowers can be used along­side each other, depending on the output required and the width.

More EC

Teddington happily makes use of the well equipped test and exper­i­men­ta­tion research and devel­op­ment facil­i­ties offered by ebm-papst Mulfingen. Following exten­sive measure­ments, the entire product range was opti­mised at the begin­ning of 2009 with respect to noise devel­op­ment and power. “More and more end customers are discov­ering EC tech­nology, which we offer as an alter­na­tive to the AC stan­dard,” reports Schaefer. For example, if you consider a large shop­ping centre, in which the doors are open from morning till evening, the air cushion system fitted with EC fans quickly pays for itself. This ensures a constantly pleasant climate, and does so even more energy-effi­ciently and even more quietly. And that helps the customers to feel good as well.

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