As a storage system specialist, Lumenion Gmbh develops a high-temperature Combined Heat and Power Storage System (CHPS) for the integration and sector coupling of excess electricity from renewable energy sources. The CHPS stores the intermittent wind and solar power and converts it into continuous high-temperature heat (steam). A steam turbine can furthermore reconvert the steam into electricity.
Short description of the project contribution
Combined Heat and Power Storage System for demonstrative sector coupling in the electricity and heating market
Lumenion has developed an innovative high-temperature energy storage system as well as a so-called Combined Heat and Power Storage System (CHPS).
The energy storage system should be demonstrated in the Berlin city district ‘Bottroper Weg’ and used as a district storage solution in the scope of the workstream ‘city district concepts – prototypes of the Smart City’. Since 2015, the tenants of the district can already procure district electricity, which is provided by a highly efficient CHP unit. The CHP unit is operated by Vattenfall Energy Solutions GmbH, the third partner in this project (next to Gewobag ED), and also complements the local heat supply.
This existing system should now be expanded with a Lumenion CHPS. This will enable a more efficient and environmentally friendly supply of carbon-free heat to the district by means of sector coupling of excess electricity. Initially, the storage unit will only supply heat to the district (Power-to-Heat) as an expansion of the existing installation. In the second expansion phase, involving the integration of a steam turbine, energy that cannot be directly consumed as heat should be reconverted into current and offered as carbon-free district electricity.
Thanks to the newly developed high-temperature process, we can efficiently use existing facilities in addition to the high energy density, which is 10 times higher than that of a water boiler and as a result also 10 times more compact.
In this manner, we demonstrate that this Power-to-Heat-and-Power installation can also be easily integrated into urban building complexes.