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Overview of the current steam system conversions
© GEF Ingenieur AG
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Model for other steam networks

The Munich pilot project has encouraged other major steam network operators in Germany and abroad to take a look at converting their steam networks and to consider implementing the new conversion method. In 2002/2003, a conversion concept based on the new method was developed in Salzburg (Austria) and already implemented from 2005. Particular motives there were the flooding problem caused by the flooding of the Salzach River and the plan to integrate more waste heat sources into the heat supply. According to the German Heat and Power Association (AGFW), there are around 100 steam networks in Germany with a total pipeline length of around 1,300 km. Parallel to the first conversion stages in Munich, it was investigated whether it was possible to transfer the method to other steam networks based on projects planned for Ulm, Dortmund and Würzburg. However, although there was potential in all three networks, more unfavourable hydraulic conditions existed with the condensate system diameters. This meant that considerably more upgrading would have been required than in Munich. A more favourable feature in other networks was the fact that the condensate pipeline systems were mostly laid using steel pipes, so that considerably higher pressures are possible in the return feed.

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Stadtwerke München GmbH