Biddle CA2 Spezifikationen PDF herunterladen (Seite 4)

Air Volume

On more demanding days it is usual to increase the operational speed of an air

curtain. Similarly on milder days the speed would be reduced. A standard air curtain

with a fixed area discharge grille, means the air velocity increases or decreases

accordingly, resulting in a drop in energy efficiency and comfort.

One of the important differences between the Biddle CA2 air curtain and a standard

air curtain is the inclusion of a patented damper mechanism. This assembly helps

maintain the optimum relationship between air volume and discharge velocity –

which we refer to as the air curtain strength or impulse.

Discharge Temperature

Biddle research showed that energy efficiency decreases with an increase in

discharge air temperature. Hot air is more buoyant and reduces the effect of good

climate separation. Trials by Biddle investigated various temperatures, in order to

ascertain which one would be most efficient and provide the highest levels of

comfort throughout the year. Research found that a discharge temperature of

35°C ensures optimum comfort of those passing under the air curtain and anyone

close to the entrance. Temperatures up to 50°C can be useful in extreme and

demanding environments.

An air curtain will bring about air movement at low level within the building, close

to the door. Whether this is seen as comfortable is highly dependent on its

temperature. At the specified temperature, comfort is not compromised.

The Invisidor CA2 incorporates controls that automatically regulate the discharge

air temperature.

Automatic Control

Customer research has established that at the time of installation an air curtain

is typically set to operate at a mid-speed setting and rarely adjusted. This results

in the air curtain continually operating at a single air volume, velocity and

temperature. However as internal and external conditions constantly vary this

means the air curtain will only be operating at the optimum setting some of the

time

and for the rest of the time will be on either too high or too low a setting

To ensure optimum performance, enhanced comfort and minimal energy loss as

conditions c

hange the CA2 air curtain utilises CHIPS technology to automatically

adjust disc

har

ge velocity

, air volume and discharge temperature. Outside, return

air and discharge temperature sensors are used to determine how much heat is

equir

ed and the bespok

e control algorithm

‘tr

anslates’ the data into the str

ength

(a combination of air volume and velocity) r

equir

ed for optimal climate

separation and comfort.

amper mechanism is automatically controlled by

PCB giving a controlled air strength

Damper mechanism fully opened providing a

controlled air str

ength

b-touch control pad

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