Advantages of parallel flow (Tichelmann)

Contrary to the conventional serial laying of pipes in panel heating systems, there is a much more effective alternative: parallel laying, also called the Tichelmann system. In this process, several pipes are connected via common manifolds at both ends. The manifolds are each open at the diagonal ends and closed at the other ends.

Advantages of parallel laying

• Easy installation, as no pipes need to be bent
• The parallel arrangement of the tubes reduces the total tube resistance
• very small pipe clearances can be realized without mechanical stresses
• Due to the low total pipe resistance, very large heating circuits can be realized
• The water flows quickly through the entire system, as it does not have to pass through each pipe
• Due to the high flow velocity, the difference between flow and return temperature is very small (between 1 and 3K)
• Due to this small temperature difference and the narrow installation distances, very homogeneous surface temperatures are achieved

 

 

The traditional way to install panel heating is by means of the single-pipe system. This is laid in the snail or meander principle. These variants are widely used.

 

Problem of serial laying

• me2 pipe is bent during installation
• Bending creates a mechanical tension, so it must be very well fixed to the base
• This mechanical stress leads to problems with some surfaces (screed, plaster), which must be compensated for by high overlap
• The longer the tube, the higher the tube resistance
• The pipe may be a maximum of 120 linear meters
• Since you also want to have only one heating circuit in a room, the pipes are usually installed at a correspondingly large distance.
  → With a pipe spacing of 15 cm, a maximum area of approx. 15 sq. m. can be heated
• The water flows slowly through the pipe due to the high resistance and can cool down very much. The difference of flow and return temperature are up to 10K
• This large temperature difference (spread) and the high installation distance result in heterogeneous surface temperatures.

 

Hopefully, this fact check will help you make a more informed decision and take the shyness out of researching our 21st century heating system as well.

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