Data sheet

Wieland Coaxial Heat Exchangers

Condenser and Evaporator with optimum counter-flow layout

Wieland coaxial heat exchangers are used as condensers (WKC) or as evaporators (WKE). Depending on the performance they consist of one or more thermal optimized inner tubes and one outer tube. The counter-flow layout ensures an optimum heat exchange.



Calculate your coaxial heat exchanger directly online: ThermalS

 

Coaxial Condensers WKC

Wieland Coaxial Condensers are normally used in applications which require high water temperatures in conjunction with the use of hot gaseous refrigerant. For a low-noise, non-vibration operation, dents are pressed into the jacket tube.   

Coaxial Evaporators WKE

These Coaxial Heat Exchangers are the preferred choice in applications where water needs to be cooled significantly. At the same time they also offer reliable superheating of the suction vapour, which is supported by the counter-flow layout. A low-noise operation is achieved by spacer rings in the jacket tube.

 




Available Versions

Coaxial Condensers WKC
Model








Number
of inner
tubes






 

Installation
dimensions [mm]




Connection dimensions [mm] Volume [l]

Weight
appr.
[kg]






Classification
PED
2014/68/EU






Refri-
gerant
Coolant

  Refri-
gerant



Coolant



A B H d1* d2*/d3* d4** a h
WKC 10 1 225 270 135 16 12.7 15.9 190 98 0.6 0.3 3.5 sound engineering practice
WKC 15 1 230 290 235 18 16.0 19.0 190 196 1.0 0.8 7.5 sound engineering practice
WKC 20 1 350 360 220 22 21.7 25.5 300 172 1.8 1.75 10.5 Category 1
Module A
WKC 45 4 520 530 225 35 28.0 31.9 445 152 3.7 2.9 21.0 Category 1
Module A

*   Internal soldering ends
** External soldering ends


Coaxial Evaporators WKE
Model








Number
of inner
tubes






Installation
dimensions [mm]



Connection dimensions [mm] Volume [l] Weight
appr.
[kg]







Classification
PED
2014/68/EU







Heating
medium
Refrigerant

  Heating
medium




Refri-
gerant




A B H d1* in
d2*
out
d3*
a h
WKE 10 1 330 325 130 16 13 13 290 94 0.8 0.4 4.1 sound engineering
practice
WKE 16 2 340 390 190 28 22 22 290 140 1.8 0.9 8.1 sound engineering
practice
WKE 24 3 435 465 175 28 18 18 380 122 2.4 1.3 11.1 sound engineering
practice
WKE 44 5 605 600 220 35 22 28 530 150 4.9 2.9 24.7 Category 1
Module A

* Internal soldering ends

For WKE 10 the fitting on the refrigerant side can be used as external soldering end d4 with ∅ 16 mm (e.g. for tube ∅ 18 x 1 mm).


Coaxial heat exchangers

Condensers WKC                                                                                                             Evaporators WKE
1   Coolant outlet | e.g. heating water                                                                                         1  Refrigerant inlet
2   Coolant inlet | e.g. heating water                                                                                           2  Refrigerant outlet
3   Refrigerant outlet                                                                                                                    3  Heating medium inlet
4   Refrigerant inlet                                                                                                                      4  Heating medium outlet

Application

Assembly instructions

Coaxial heat exchangers should preferably be operated in counter-flow operation. The inner tubes as well as the jacket tube and brazed T-fittings are made of Cu-DHP.

Condensers WKC are installed so that the liquefied refrigerant is free to drain away to the bottom. The hot gaseous refrigerant enters the jacket space at the top, whereas the cooling medium (e.g. water) enters the inner tube(s). Coaxial condensers are also installed standing on the windings (winding axis horizontal). If an application requires several condensers to be connected in parallel, then the tubing should be designed in such a way that each condenser can be supplied with even pressure on both the refrigerant side and the cooling medium side.

The routing of the hot-gas line should be installed avoiding any vibrations. This is normally achieved by installing vibration dampers (compensators). In order to avoid pulsating noises, we recommend installing a sound muffler between the compressor and the condenser. Please follow the manufacturer`s instructions when installing these components.

The installation of evaporators WKE preferably allows the refrigerant to enter through the upper connection. If several evaporators of the same size are to be connected in parallel, then it must be ensured that each evaporator is supplied with even pressure both on the refrigerant side and on the heating medium side.

For an approximation of the refrigerant capacity of the overall system following proportions of the refrigerant side volume should be used as an approximation: WKC: 30%, WKE: 40%

Quality Assurance

Responsibility begins with a high standard of quality. As the first company for semi-finished products in Europe, we have been on the path to certified quality management since 1987.
Today, we have DIN EN ISO 9001:2015 certifications for all producing plants, and our testing laboratories in Ulm and Vöhringen are additionally accredited to DIN EN ISO/IEC 17025:2018.

Pressure Equipment Directive

Coaxial heat exchangers correspond with the Pressure Equipment Directive 2014/68/EU. They are normally classified in the categories mentioned in the overview and are manufactured and supplied in accordance with the measures designated for this purpose. Operating conditions which exceed these specifications are subject to special requirements which should be agreed separately for each individual case.

Wieland Thermal Solutions
Heat exchangers

P +49 731 944 1133
Send E-mail

Download this Page as PDF

Go back