WK-D-WF

Cooling/heating capacities depending on Δt

When heating, surface temperatures > 35 °C should be avoided as otherwise comfort will suffer. Maximum operating pressure and maximum operating temperature apply when flexible hoses are used. When using chilled ceilings for heating, only the proportion of radiation is relevant. When sizing chilled ceiling systems, it is NOT recommended to use the standard cooling capacities (φw,c,a) to EN 14240 as the results cannot really be compared. It is, however, recommended, to use the specific cooling capacity based on the usable panel area (φw,c,p) as it pertains to the active area of a chilled ceiling system. Only then is it possible to determine the achievable cooling capacity and to compare it to the cooling capacity per m2 of floor space that is required for the design.

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

Technical data

• 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)