Germany – Construction works for power plants and heating plants – Elektrodenheizkessel Reick - Los 1.2. Anlagentechnik Balance of Plant

The DREWAG Stadtwerke Dresden GmbH (hereinafter DREWAG), a subsidiary of the Sachsen Energie AG, operates the Central District Heating Network (ZFHN) of the city of Dresden. As part of the planned decarbonisation, the share of regenerative heat generation is to be significantly increased. An important component of this are Power-to-Heat plants (P2H plants), which use regeneratively generated electricity for heat generation. Electrodes boilers enable the production of hot water for district heating supply. Against this background, DREWAG plans to build an electrodes boiler plant (EHK plant) for heat generation for the ZFHN at the site of the Heizkraftwerk Dresden-Reick (HKW Re). 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 permitting • synergies in operation and maintenance through spatial proximity to existing plants and existing operating personnel The project includes the construction of an EHK plant with 2 × 40 MW of electrical power and its integration into the ZFHN. The coupling is indirect 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 mechanical and process engineering services, technical building equipment (TGA), electrical and control engineering systems, and construction services. The participation competition and the awarding will be carried out according to criteria which are defined in the tender documents. The complete tender documents (detailed planning) will only be made available to the qualified bidders after the end of the participation competition.