Airflow Travel Distance

Supply air is delivered through fabric diffusers using almost any diameter of laser cut perforation in any position on the duct circumference. This combination of any size and position of perforations provides an almost infinite number of design variations. The range of possibilities begins with low velocity diffusion and continues up to long-distance targeted air supply. Small perforations with a diameter of 0.2 or 0.4 mm, which we refer to as microperforations, are designed mainly for use as low velocity air diffusion. We use a series of 4mm diameter or larger holes, which we call perforations, to provide directed air supply. When calculating the air travel distance, the supply air to room temperature difference must be considered.




Fabric Diffusers are a universal air distribution tool and cover the entire range of air delivery patterns. We achieve the requested air distribution by selecting the correct air outlet method. We can combine the air outlet methods on a single diffuser duct in any pattern or ratio we wish.




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Airflow Travel Distance from Fabric Diffusers

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Travel distance varies depending upon available static pressure and temperature difference.


The air velocity at various distances from the diffuser can be calculated by our ’in house‘ design software which is being constantly refined and takes into account all associated design influences. These include specifically, positive pressure in the diffuser, position and dimensions of outlet openings, and temperature difference. In cases where the air velocity cannot be reliably calculated by the software (due to complex interaction of multiple air flows for example) we can provide these calculations by means of our Fluent software.




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Airflow patterns created by PRIHODA design software
Airflow patterns created by Fluent software

 

In general, Prihoda Fabric Diffusers operate at similar air flow velocities to traditional ducting. The maximum speed within the duct is dictated by aerodynamic noise in relation to the place of use. A further velocity limitation may be needed due to flow turbulence, which can cause vibration of the fabric. Specific conditions of flow, static pressure and weight of the fabric used must be taken into account.




- Our original solution -

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