Trox - Model WK-D-WF -Convective Chilled Ceiling

• Preferably for room heights up to 4.00 m
• High heating and cooling capacity with a low conditioned primary air volume flow rate and low sound power level
• High comfort levels due to low airflow velocity in the occupied zone
• Five nozzle variants to optimise induction based on demand, including adjustable twin nozzles, i.e. one pair of nozzles with different diameters
• Removable induced air grille, fixed with magnets, with decreasing apertures towards the edges

Optional equipment and accessories

• Control system
• Adjustable air control blades for air direction control
• Powder coating in many different colours, e.g. RAL CLASSIC
• With an extended border also suitable for freely suspended installation

used as rafts absorb heat energy from the room air and transfer it to the chilled water. Convective chilled ceilings are made up of cooling panels in an open design with regular gaps. Convective chilled ceilings (and also continuous chilled ceilings) operate according to radiation and convection principles. The heat radiated from the room is absorbed on the lower surface of the panels. The warm room air near the ceiling comes into contact with the wave-shaped blades that are carrying chilled water. The air is cooled as a consequence and then, due to the difference in density when compared to the warmer air, descends slowly back to the occupied zone. This ensures a high comfort level for room occupants as there are no draughts. As the cooling panels for convective chilled ceilings are installed in an open arrangement (with gaps) below the ceiling slab, the room air comes into contact also with the upper surface of the wave-shaped blades. This construction and installation type results in increased convection when compared to continuous radiant chilled ceilings and in a higher cooling capacity. The special shape of the panels allows for the best possible cooling capacity. The largest proportion of the cooling capacity is provided by convection (approx. 70%). The remaining proportion of the cooling capacity is provided by radiation.

Chilled ceilings and rafts are used for the cooling of internal spaces. They absorb heat energy from the room air and transfer it to the chilled water, thereby dissipating thermal loads. As the room air becomes cooler upon contact with the cooling panel, it gradually descends back to the occupied space as a result of the differences in density between warm and cool air. This is why chilled ceilings and rafts are considered a particularly good solution for creating comfortable room temperatures, especially for cooling. The Type WK-D-WF convective chilled ceiling has a larger specific cooling capacity than classic radiant chilled ceilings due to its large surface area and gaps. The cooling panels consist of performance-optimised, horizontally arranged wave-shaped blades and come in widths of 200 mm or multiples thereof. The attractive design of the blades and the flat structure of the cooling panel that is only 70 mm high allows for appealing raft solutions. Approx. 30% of the cooling capacity is provided by radiation. The large surface required for this is provided by wave-shaped blades that support load dissipation by heat radiation. Approx. 70% of the cooling capacity is provided by convection. The cooling panel has gaps so that the room air can flow around the blades with the embedded water carrying coil, which means that a relatively large volume of air is cooled on both the lower and the upper surfaces of the cooling panel. Thanks to their construction the cooling panels can be used as individual rafts or combined to a chilled ceiling whereby the panels are connected in a hydraulic circuit. Heating is also possible with WK-D-WF, but only the radiation proportion can be used for heating.

Special features

• Can be freely suspended (raft-type installation) or combined with an open cell ceiling to form a convective chilled ceiling
• Approx. 70% convection and 30% radiation
• Wave-shaped blade, 170 mm wide

Materials and surfaces

• Profiled blades made of aluminium
• Copper pipe (serpentine)
• Cooling panel powder-coated RAL 9010, pure white GU50
• P1: Cooling panel powder-coated (RAL colour on request)

Construction

• Exposed surface is pure white – RAL 9010 GU50
• Other RAL CLASSIC colours on request

• Length: 1000, 1500, 2000, 2500, 3000, 3500, 4000 mm
• Height: 70 mm
• Width: 400, 600, 800, 1000, 1200, 1400 mm
• Cooling capacity EN 14240 (Δt 8 K): up to 110 W/m²
• Cooling capacity (Δt 10 K): up to 142 W/m²
• Heating capacity (Δt 15 K): 100 W/m²
• Heating capacity (Δt 30 K): 215 W/m²
• Maximum operating pressure – water side: 20 bar (with flexible hoses approx. 6 bar)
• Maximum operating temperature – water side: 75 °C (with flexible hoses approx. 50 °C)