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District cooling plant at Europaplatz in Heidelberg

Europaplatz Heidelberg

Network for the cooling supply of residential and commercial buildings in the Bahnstadt district in Heidelberg, Germany

Ice storage challenge


The central cooling must guarantee a high level of supply reliability.

Icon - Ice storage - specific task

Purpose of the installation

Highly efficient local cooling supply for several customers in Heidelberg's Bahnstadt district with the lowest possible noise emissions

Icon - Ice storage technology in use

Technology in use

  • High-performance ice storage units type sp.ICE HC 30' and 20'
  • Oil-free compression chillers with magnetically levitated compressor shafts
  • Extremely quiet hybrid drycoolers
sp.ICE ice storage system dynamics icon

Performance data

  • Storage capacity: 24 MWh
  • Cooling capacity max : 13 MW
  • Charging time: 6 h
  • Achieved efficiency increase > 20%
  • Achieved CO2 savings > 800 t/a


With more than 1,000 employees, Stadtwerke Heidelberg GmbH is responsible for the energy supply in Heidelberg and the surrounding area. In view of climate change, this includes the task of organising the most energy-efficient and climate-friendly air conditioning possible for people and buildings. Several cooling plants are planned and implemented to supply cooling.

Scope of delivery and services:

Planning, production, installation and commissioning of the cooling plant for a district cooling network consisting of 6 ice storage modules, 2 hydraulic modules, 2 cooling generation modules, 2 hybrid recooling plants as well as associated I&C technology, steel construction and pipework.

Purpose of the system:

The system is used for the highly efficient local cooling supply of several customers in Heidelberg's Bahnstadt district. As soon as favourable energy is available, the system generates cold and stores it in the ice storage units until it is used by the customers. A PV system installed on the roof and façades of the central cooling plant supports the refrigeration system.

The challenge:

The district cooling supplies pharmaceutical customers, offices and a congress centre, among others, and must guarantee a high level of supply reliability. It borders on an exclusive residential area and must enable noise and emission-free operation.



Other Projects

  • Cooling supply for a data centre and local cooling network with emergency supply

  • Compact ice storage for new building complex

  • Ice storage for production and logistics centre

  • 3 ice storage modules for the air conditioning of an office building

  • GRP ice storage for cooling foodstuffs