An Ghearmáin – Building construction work – Elektrodenheizkessel Reick - Los 4.2. Erweiterter Rohbau und Tiefbauleistungen

DREWAG Stadtwerke Dresden GmbH (DREWAG), a subsidiary of Sachsen Energie AG, operates the Central District Heating Network (ZFHN) of the city of Dresden. As part of the planned decarbonisation, the proportion of renewable heat generation is to be significantly increased. An important component of this are Power-to-Heat plants (P2H plants), which use renewable electricity for heat generation. Electrodes boilers enable the production of hot water for the district heating supply. Against this background, DREWAG plans to build an Electrodes Boiler Plant (EHK Plant) for heat generation for the ZFHN at the Heizkraftwerk Dresden-Reick (HKW Re) site. The site offers particularly favourable conditions for the construction and integration of the plant:

• existing electrical power supply at medium voltage level

• existing connection to the district heating network

• use of existing heat storage as a hydraulic buffer

• available developable areas and generally feasible approval

• synergies in operation and maintenance due to spatial proximity to existing plants and existing operating personnel

The project includes the construction of an EHK plant with 2 × 40 MW electrical power and its integration into the ZFHN. The coupling takes place indirectly via heat exchangers. The existing heat storage system at the site takes on the function of a hydraulic switch between the electrodes boilers and the district heating network, thereby decoupling generation and demand in time. Currently, two operating modes are planned:

• Planned heat generator as part of the regular district heating provision

• Participation in the control energy market (provision of system services), in particular the provision of primary and secondary control power (PRL and SRL)

The overall project will be awarded and processed in several lots. The lots include machine and process engineering services, technical building equipment (TGA), electrical and control engineering systems and construction services. The installation of the EHK is scheduled to begin in the 1st quarter of 2028. The subsequent commissioning (IBS) is planned for the 3rd quarter of 2028. The selection competition and the awarding will take place according to criteria which are laid down in the tender documents. The complete tender documents (detailed planning) will only be made available to the qualified bidders after the end of the selection competition.