Heating and cooling with wastewater – Wienkanal

THERMAFLEX DEMO PROJECT: Use of waste heat from wastewater for heating and cooling

© Green Energy Lab
© Green Energy Lab

Use of waste heat from wastewater for heating and cooling the new headquarters of Wien Kanal in Vienna-Blumental.

ThermaFLEX answers the following research questions:

  • Concept for the smart use of renewable energy from municipal wastewater
    Heating 215 kW (max. 450 kW) to the heat pump
    – Cooling 400 kW (max. 500 kW) to the heat pump
  • Construction and installation of specific heat exchangers
  • Development and installation of innovative monitoring for
  • Support operation of the heating / cooling center
  • Monitoring influence on sewer operation (temperature, level, etc.)

To the article “Heating and Cooling”

>> to the ThermaFLEX lead project


Rainer Wiedemann
T: +43 7230 7213 – 743
E: rainer.wiedemann@rabmer.at

Project key facts

01.11.2020 - 31.10.2022

funding program
Umweltförderung im Inland

Project type
Demonstration project

Project budget

Project management

Rabmer GreenTech GmbH

The following model solutions are being developed in the Heating and cooling with wastewater – Wienkanal project:


Media reports on the project

Renewable wastewater energy reduces dependence on natural gas

The energy transition, in particular the phase-out of natural gas, has taken on a new urgency due to the war in Ukraine and the tense relationship between West and East. Quickly available, renewable and politically less volatile energy sources are in demand - the technology is already available in Austria, now it is time to roll it out as quickly as possible. Energy generation from waste water, for example, is said to have great potential...

To the article