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Article Date: 25th January 2017

Frenger - X-Wing® - "Radiant" Passive Chilled Beam

Passive Chilled Beam - Chilled Beams - Multiservice Chilled Beams

Frenger X-Wing Chilled Beam

X-Wing is one of Frenger's latest range of next generation Chilled Beams. Energy efficiency has been a key driver for such advancements in Frenger's Chilled Beam Technology.

X-Wing is only 125mm deep and can achieve up to 370 watts per meter as an exposed passive "Radiant" / convective cooling unit and up to 170 watts/m² when concealed behind an S5046 perforated metal ceiling (both sets of maximum performance are based on 10dTK).

NB. The above performance figures are waterside cooling and no inclusion made for any additional cooling effect from any separate supply air system for respiratory requirements.

X-Wing contains a number of Patent pending performance enhancing features, as can be expected from the Frenger brand.

X-Wing is constructed from copper and aluminium and is 100 percent recyclable. The copper coil is produced by Frenger's in house fully automatic bespoke "state of the art" full CNC serpentine bending machine. This produces seamless sinusoidal copper coils (without any joins, hence no risk of water leakage) up to 6m in length, with up to 12 water passes at 70mm tube centres. The aluminium radiant "wings" are produced in house by bespoke power press and roll forming machines, all of which are then assembled by Frenger's fully automatic CNC controlled machine which mechanically bonds the "radiant wings" to be in metal to metal contact with the seamless copper waterways.

The finished products are hydraulically tested to 17 bar positive pressure as standard before automatic machine wrapping and packaging.

Frenger, have automated the vast majority of processes for this particular next generation product to ensure that the highest levels of quality are both repeatable and consistent at all times.

Frenger  X-Wing Chilled BeamFunction
X-Wing® provides cooling by both convection and "Radiation". The radiant proportion creates no air movement, the only air movement comes from the convective proportion. As cold water passes through the chilled beam the warm room air is cooled against the beam's cooler surfaces. This cooled air, which is heavier due to it's higher density, then streams through the punched louvres in the radiant wings and percolates through the small ceiling perforations into the room space below (when concealed). In this way air is circulated within the room, with warm air from the room being continually replaced by cooled air.

In addition to this convective cooling process, the cold surfaces of the beam (the radiant wings / 4 per waterway) also absorb heat radiation from the building occupants and the warmer surrounding surfaces. X-Wing's radiant quotient is approximately 40% of the total cooling effect (the other 60% of cooling being generated by the convective cooling effect described above). The ability of X-Wing to cool by radiation means that, when compared to a finned tube battery, X-Wing can deliver 40% more cooling without any additional risk of draft.

The efficiency of the convection process, coupled with the ability of the product to exchange energy by way of long-wave radiation, means that X-Wing retains a high cooling effect even when the air temperature in the room is relatively low (e.g. at night or when the building is unoccupied). In this way large amounts of cold energy can be stored in the building structure during low load periods, and used to offset heat gains when the need arises.

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