Germany – Electrical fitting work – Großwärmespeicher Nossener Brücke - Los 3 Elektrotechnik

SachsenEnergie AG (hereinafter SE) operates the Central District Heating Network (ZFHN) of the city of Dresden. For heat supply, combined heat and power plants, a pressure heat storage system, electrode boilers and various decentralised heat pumps are operated at three central locations. As part of the planned decarbonisation, the share of regenerative heat generation is to be significantly increased by adding further heat pump and electrode boiler capacities. Against this background, SE wishes to have an atmospheric 2-zone large heat storage system constructed at the site of the HKW Nossener Brücke / east of Fabrikstraße. The large heat storage system will have a usable volume of 50,000 m³ of hot water and a storage capacity of 2,800-3,000 MWh. The charging/discharging power of a minimum of 10 MWth to a maximum of 150 MWth is to be achieved. The maximum flow temperature of the storage will be 115 °C. The large heat storage system consists of a hot water tank approximately 60 m high with an external diameter including facade of approximately 41 m. The tank will be connected to the pump hall B25m x L31m x H13.4m via two pipelines (flow and return) via a pipeline bridge. The pump hall contains the pumps on the ground floor and the flow and return distributors on a grid floor on the first 1. OG. The flow and return distributor will be connected to the existing channel at Ammonstraße via a district heating canal under the pump hall. The control/process control and electrical infrastructure is housed in the switchgear extension of the pump hall. 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 - available developable areas and fundamentally feasible permit - synergies in operation and maintenance through spatial proximity to existing systems and existing operating personnel at the power plant site Nossener Brücke The large heat storage system is to be operational by 2030 at the latest.