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Frankenwald grammar school

The specialist class wing of Frankenwald grammar school in Kronach, Germany, was refurbished to the tune of 12 million euros.

Frankenwald grammar school is at the top of its class for drinking water hygiene 

At what intervals does cold drinking water have to be exchanged to prevent it from heating up above a temperature of 25°C at which the risk of contamination increases? This could be the question for an exciting physic's experiment at the Frankenwald grammar school in Kronach, Germany. Yet, the best way to arrive at the answer would be to ask the sanitation and heating experts. After all, when refurbishing the school, they created a model concept for guaranteeing drinking water hygiene. Also in the physics lab.

Viega Hygiene+ concept ensures the exchange of water

The time required for stagnant cold drinking water to exceed the critical threshold of 25 °C in pipes depends on a number of interdependencies. For example the ambient heat loads. In order to rule out inadmissible permanent temperatures, the water must be exchanged within seven days in accordance with DIN 806-5. Indeed VDI/DVGW 6023 even states that water should be exchanged after a maximum of three days.

Interruptions in use of the drinking water system are unavoidable in schools, for example during the holidays. However stagnant water can be prevented. To this end, Viega flushing stations with Hygiene+ function have been installed in the school's sanitation rooms for the cold water systems. As such flushing is performed automatically with just the right amount of water if the intervals following the last regular trigger were too long. A flush is also automatically actuated in the case of critical temperature changes.

At certain extraction points, e.g., in the physics room with just one sink basin, water exchange is ensured via Viega press-in nozzles based on the Venturi principle. Each nozzle is located in the main distribution. It creates a defined pressure difference in the relevant outgoing ring system to the extraction point. This means that water in the pipe sections with extraction points which are only used rarely is exchanged regularly.

That's applied physics – from the classroom, put into practice and back again.

Object Frankenwald grammar school
Location Kronach, Germany
Year 2012
Object Type Renovation
Area of use Education science
Planning Dipl.-Ing.(FH) VDI Stefan Detsch, Kronach
Installation Thomas Zeh, Kronach
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