Pressure heat storage system for utilizing industrial waste heat in Ingolstadt
Many industrial plants and commercial areas also generate heat during production. This is often an untapped source of energy—heat storage systems can absorb this valuable resource and make it available as needed over a longer period of time!
Industrial production heat supplies district heating network
The Ingolstadt district heating network is the largest project of its kind in Bavaria: Stadtwerke Ingolstadt supplies private and commercial customers – from rental apartments to car manufacturer Audi – with waste heat from surrounding businesses.
Two thermal pressure storage tanks were integrated to increase efficiency. The 25-meter-high towers store up to 170 megawatt hours of energy in the form of 130 °C hot water and release it as needed. Kremsmüller Anlagenbau GmbH was responsible for planning and implementation, together with Max Straube GmbH for the piping. The project also included hydraulic integration into the district heating network and a pressure maintenance system with a compensation tank. The million-euro project was completed on schedule and within the agreed budget. Project manager Stephan Fischer praises the collaboration:
“In terms of construction management, Kremsmüller was the best company I have worked with so far – transparent, uncomplicated, and helpful.”
CO2 savings with technical and visual impact
Since the pressure heat storage system went into operation at the beginning of 2019, the annual CO2 savings of the Ingolstadt district heating network have risen to 73,000 tons, according to the municipal utilities.
Facts
Project
- Two pressure heat accumulators for the district heating network
- Hydraulic integration into the district heating network
- Pressure maintenance system with expansion tank
- Complete piping
Project partners for planning and construction
- Kremsmüller Anlagenbau GmbH
- Max Straube GmbH – Teil der Kremsmüller Group (Verrohrung)
Dimensions per storage unit
Diameter 10.01 meters x height 25 meters, volume: 1,600 m³
Weight per storage unit (filled)
approximately 1,400 tons
Excess pressure
5 bar
Temperature of the storage water
up to 130°C
Annual CO2 savings since commissioning
- 73.000 tons
“New landmark for Ingolstadt” is a bit of an exaggeration for these striking towers, especially with Audi as their neighbor. But the project does have a certain appeal—particularly from a technical standpoint, with its guarantee of CO2-neutral heating.
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