News and Articles
30/04/2011 | News, Newsletter July 2011
First operating experiences and measurement results for solar district heating system in Munich

The inhabitants of the residential area at the Olympic Park are supplied with solar heat for heating and domestic hot water also during winter time. For this purpose a seasonal hot water storage with a capacity of 5.7 million liters works in combination with a heat pump.

The city of Munich has chosen a section of the new district 'Am Ackermannbogen' to build a solar district heating system. The residents live either in one of the four large apartment buildings or in one of the eight smaller town houses. The thermal insulation standard of the buildings fulfils the requirements of the currently valid EnEV 2009.

The heating plant supplies 30,400 square meters of floor area with solar heat and additionally with district heating of the Utility of Munich (SWM). The SWM planned, built and operates the entire heat supply system on behalf of the City of Munich.
The 2,761 square meters of collector aperture area deliver solar heat. The buildings have a sub-roof; the collectors are mounted as outer roof. This separation was necessary for legal reasons: The lower roof is part of the building, the solar thermal system is owned by SWM. A mixture of water and glycol transports the energy through the solar network to the heating plant. The piping system is equipped with enhanced insulation compared to standard pipes in order to reduce heat losses. In the heating central it is transferred to the pressure-less storage circuit. Since 2004 the project was accompanied with simulations, technical tests and improvements in operation by the Bavarian research organization ZAE Bayern and the Steinbeis Research Institute Solites. Until now, a solar fraction of 45% was achieved. The project was funded by the German Ministry for the Environment, Nature Conservation and Nuclear Safety.
 
Source: BINE Projektinfo 02/2011 - Mit Sommersonne gegen Winterkälte, BINE Information Service, the complete article can be downloaded from the website of the BINE Information Service www.bine.info.

 

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