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Brandenburger Heatliner^®

Brandenburger Heatliner^® - Sewage as tomorrow's energy

"Sewage contains a large quantity of thermal energy that can be used to heat buildings using modern heat-pump technology. The potential of this renewable energy source is quite high. With sewage heat, a heat supply adequate for 10% of all buildings in Germany could be achieved."
(Source: Advisory Leaflet DWA M 114)

Brandenburger has developed a process in which the conditions required for wastewater heat recovery are established in combination with sewer rehabilitation by means of pipe liners.

The Brandenburger Heatliner^® consists of three components:

1. Outer liner: Brandenburger BB^plus liner for rehabilitating the sewer
2. Heat exchanger mat in the sewer base as absorber for heat recovery
3. Inner liner: Brandenburger BB^plus liner for fixating and protecting the heat exchanger mat

The installation steps:

After all necessary preparatory work for the pipe liner rehabilitation, the outer liner is pulled into the sewer using a cable winch, expanded with pressurised air and cured using UV light. The purpose of the outer liner is rehabilitation of the defective sewer; thus this liner has to be appropriately dimensioned to fulfil the stress requirements.

In the second step, the heat exchanger mat is pulled into the pipe base.

Now the inner liner can be installed. The inner liner can be thin-walled, as it does not perform a structural function. Like the outer liner, the inner liner is pulled into the sewer using a cable winch, then expanded with pressurised air and cured using UV light.

Finally, the feed and return line connection from the shaft is connected to the heat pump.

If sewer rehabilitation is not necessary, but wastewater heat recovery is desired, the system can of course be installed without an outer liner.

>> Areas of use of the Heatliner®
>> Advantages of the Heatliner®
>> Schematic drawings of the Heatliner®
>> Pilot project: Hamburg, Wellingsbüttlerweg