More efficient with less CO2 – Würzburg cogeneration plant modernized with pressure heat storage system
Heizkraftwerk Würzburg GmbH chose Kremsmüller for its modernization project. The challenge: to integrate a 45-meter-high pressure heat storage tank into the existing power plant. The result: lower CO₂ emissions and higher efficiency.
Greater efficiency in inventory
The combined heat and power plant is located near the old town—a particular challenge for future-proof energy supply. After examining alternatives such as solar thermal energy and geothermal energy, the operator opted for the heat storage system. “Flexibility and efficiency over 15 to 20 years are crucial. In an established infrastructure, heat storage is the only sensible solution,” says the customer.
Installation in existing buildings – unique in Germany
The storage facility was integrated into the existing building—a unique project in Germany. To preserve the cityscape, the foundation was lowered by three meters. The storage facility measures 9.4 m in diameter, is 45 m high, weighs 430 t, and stores 175,000 kWh of heat.
Sustainable effect
The expansion improves the ecological balance of the power plant, which supplies 90% of Würzburg’s district heating network. CO₂ emissions are reduced and efficiency increases by 5%. The storage facility enables flexible, demand-oriented heat production – more efficient and economical for the future.
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