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WK-D-WF
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WK-D-WF
Detail view - suspension of the sail
Cooling panel suspension
Functional principle WK-D-WF
Principle of operation – WK-D-WF
WK-D-WF_img_04psd.png
WK-D-WF_img_03psd.png
Detail view - suspension of the sail
Functional principle WK-D-WF

WK-D-WF

Convective chilled ceiling with performance-optimised wave-shaped blades for use in reception areas or other prestigious indoor spaces


 

Convective chilled ceiling elements for freely suspended installation (raft) or for integration (with gaps) into a continuous ceiling

  • Comfortable cooling that provides thermal comfort for users 
  • Saving of energy costs as thermal loads are dissipated with water, and the air volume flow rate can hence be limited to the hygienically required minimum outdoor air flow rate 
  • High cooling capacity due to the open design
  • Aesthetic design element thanks to the wave-shaped blades
  • Design freedom is ensured thanks to variable use – either ceiling integration or free hanging (raft)
  • Simple and fast installation of the cooling panels thanks to integral suspension brackets  
  • Optional addition of acoustic insulation material above the hanging brackets
  • Ideally suited for the refurbishment of existing buildings
  • Can be combined with concrete core activation
  • Energy-efficient and cost-effective geothermal energy solutions can be used as the water flow temperature is usually not lower than 16 °C

 

 


General information

Application

  • Suitable for exposed installation, either free hanging below the ceiling slab as a raft or integrated into continuous ceilings or above closed cell ceilings
  • When used as a raft, dissipation of specific thermal loads up to 110 W/m² (to EN 14240)
  • Ensures comfortable room temperatures, particularly in cooling mode
  • Utilises the energy advantages of water for cooling/heating as it has a high specific thermal capacity
  • Comparatively low water temperatures allow for further energy savings regarding the generation of energy
  • Optional fitting of lights or other building services depending on the actual cooling panel


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


Nominal sizes

  • Nominal length: 1000, 1500, 2000, 2500, 3000, 3500, 4000 mm (intermediate lengths in 10 mm increments)
  • Nominal widths: 400, 600, 800, 1000, 1200, 1400 mm (widths result from 170 mm blade width and 30 mm gaps)


Construction


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


Useful additions

  • Flexible hoses Type FS
  • Can be combined with LWS and X-AIRCONTROL control systems (e.g. for valves, valve actuators, dew point sensors, window contacts)


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 features

  • Wave-shaped blades with embedded copper pipe for the best possible heat transfer
  • Brackets on the narrow sides to cover the copper pipe and for suspension (by others) from the ceiling slab
  • Additional Z-bracket if L > 2500 mm


Standards and guidelines

  • Cooling capacities to EN 14240
  • Given heat capacities based on EN 14037, Part 5


Maintenance

  • No moving parts, hence low maintenance


TECHNICAL INFORMATION

Function, Technical data, Quick sizing, Specification text, Order code

  • FUNCTION
  • TECHNICAL DATA
  • QUICK SIZING
  • SPECIFICATION TEXT
  • ORDER CODE

Continuous chilled ceilings and (convective) cooling panels 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. 


 

Length

1000, 1500, 2000, 2500, 3000, 3500, 4000


Height

70


Width

400, 600, 800, 1000, 1200, 1400


Standard 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


Max. operating pressure, water side

6 bar


Max. operating temperature, water side

50 °C



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.


Reference values for heating Reference values for heating

Examples of cooling capacities for different Δt, based on various panel sizes

Δt = 8 KΔt = 9 KΔt = 10 K
LBA [m²]Φw,c [W]Φw,c [W]Φw,c [W]
10004000,4445057
10006000,6667585
20008001,6175200225
200010002,0219250282
250010002,5274312352
250012003,0328375422
300012003,6394450506
30008002,4263300338
400010004,0437499563
400014005,6612699787

Δt = temperature difference between room temperature and mean water temperature
Φw,c = cooling capacity of a panel
Given capacities are independent of the selected ventilation variant.


Reference values for cooling




Water flow temperature tWV


16 °C








Water return temperature tWR




18 °C




Medium water temperature ΔtWm




17 °C




Room temperature for Δt = 8 K (DIN EN 14240) tR = tON




25 °C




 Room temperature for different cooling capacities tR = tON




Variable, °C




Temperature difference room to water ΔtWm-R




See above, K



 

Examples of heating capacities for different Δt, based on various panel sizes


Δt = 15 KΔt = 30 K
LBA [m²]Φw,c [W]Φw,c [W]
10004000,44088
10006000,660132
20008001,6160350
200010002,0200438
250010002,5250547
250012003,0300656
30008002,4240525
300012003,6360787
400010004,0400875
400014005,65601224

Δt = temperature difference between room temperature and mean water temperature
Φw,c = heating capacity of a panel
Given capacities are independent of the selected ventilation variant.

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)


WK-D-WF/3000x1000/P1-RAL…
| | | |
1 2 3 4


1 Type

WK-D-WF Convective chilled ceiling element (cooling panel) 

2 Nominal lengths [mm]

L1000, 1500, 2000, 2500, 3000, 3500, 4000

Lengths > 2500 mm with additional Z-bracket in the middle 

3 Nominal widths [mm] 

400, 600, 800, 1000, 1200, 1400 

4 Surface

No entry: powder-coated RAL 9010, pure white

P1 Powder-coated, specify RAL CLASSIC colour 

Gloss level

RAL 9010 GU50

RAL 9006 GU30

All other RAL colours GU70

Order example WK-D-WF/4000×1000/P1–RAL 9006
Nominal length4000
Nominal width1000
SurfaceRAL 9010, pure white, GU50

Dimensions, Product details

  • DIMENSIONS
  • PRODUCT DETAILS

Dimensions [mm]

Length

1000, 1500, 2000, 2500, 3000, 3500, 4000


Height

70


Width

400, 600, 800, 1000, 1200, 1400





Weight [kg]

234567
400600800100012001400
1000710,51417,52124,5
15009,51418,5232833
200011,5172328,534,540
250014,5222936,543,551
3000172533,5425058,5
35001928,53847,55766,5
4000213242,55363,574

① No. of blades

② L/BN [mm]

Weight: approx. 14 to 18 kg/m²

Combinations of cooling panel dimensions depend on the water-side pressure drop of the panels.


Installation and commissioning

  • Any work associated with the installation of cooling panels, hydraulic connections and commissioning must be carried out by specialist personnel

  • For details please refer to the installation instructions


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Our department for Service-Requests will contact you asap.
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Tel.: +49 (0)2845 / 202-0 | Fax: +49 (0)2845/202-265