Planning for a Long-Term Heat Storage as an Earth Pool Heat Tender

• Country: Germany
• Summary: Planning for a Long-Term Heat Storage as an Earth Pool Heat Storage System
• DET Ref No: 139621868
• Deadline: 17 May 2026
• Financier: Self Financed
• Purchaser Ownership: Government
• Tender Value: Refer Document
• Notice Type: Tender
• Document Ref. No.: LOT-0001 BE 260495
• Purchaser's Detail:
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• Description:
• Stadtwerke Rostock AG is inviting tenders for the planning of the construction of a long-term heat storage facility (LZS) as an underground heat storage system (pit thermal energy storage, PTES). The facility is classified as an engineering structure by the Rostock municipal utility company the earth basin heat storage including cover and the pump house with post-heating. The planning service should include service phases 1 to 8, whereby these are triggered subject to feasibility or economic feasibility. Parallel to In addition to the planning work, ongoing, comprehensive investigations of the subsoil are currently being carried out and the results are expected in quarter 3 of 2026. On the basis of this, a decision is made as to whether the “long-term heat storage” project or the planning is continued. Brief description of the system: The system is used to shift unused heat or heat potential, which is mainly available in summer, into the heating period in order to cover peak heat requirements. The long-term heat storage is charged with heat indirectly through the district heating network, separated by heat exchangers. For this purpose, a pump house with the appropriate heat exchanger should be built. Since the heat storage device plays the role of both a large consumer (loading) and a As a heat generator (discharging), pipes and fittings must enable flow reversal. The integration of an after-heater is also necessary in order to raise the stored water to the district heating flow temperature. More use cases The options for the afterheater are direct loading of the storage tank or direct feeding into the district heating network. In order to achieve the necessary heat stratification in the storage and to maintain this during both loading and unloading, it is required in the storage installed nozzles that meet this requirement thanks to their special geometry. Technical planning services (CPV code: 71356400)
• Documents:

 Tender Notice