City district concepts and Smart City
In the Berlin, Dresden and Zwickau model regions, WindNODE is realising Smart City designs with a focus on flexibilisation and regionalisation of loads and on decentralised own generation. The objective of this workstream is to test different designs, comprehend the potentials of city district concepts in the scope of the energy transition – for instance with regard to grid and system support offers – and work out transfer possibilities in other regions.
In cooperation with ZEV and SenerTec, WH Zwickau connects renewable energy producers, energy storage units and consumers of the Zwickau model region together in a smart ICT infrastructure (smart grid). We use the data from this ICT infrastructure to develop and apply forecast methods and to develop control algorithms for energy storage systems and the power supply grid. This enables us to cover relevant opportunities in the energy market, test connections to a comprehensive ICT network and evaluate user acceptance. Moreover, we provide the simulation and big data tool ‘Smart Heat’ and use it to monitor the evolution of heating in the model districts Marienthal and Prenzlauer Berg. The project is presented to interested citizens in the ‘ubineum’ show house.
In two Berlin districts, the ‘Hosemannstraße’ in Prenzlauer Berg and the ‘Lindenhof II’ in Schöneberg, the Borderstep Institute is working together with Dr. Riedel Automatisierungstechnik and the DAI laboratory of TU Berlin to test how more flexible, current-controlled operating modes of residential quarters can be achieved through various combinations of energy generation and storage in residential buildings. The technologies that are used range from modular cogeneration units, buffer and thermal storage in building mass over Power-to-Heat aggregates to smart building techniques. This enables us to create decentralised flexibility to respond to an excess supply of green power. Integrating external signals from the market and the grid, we therefore develop fitting business and calculation models for the energy and housing sector as well as a software application for end consumers.
Municipal properties, undertakings and institutions offer a large potential for energy saving and for the short- and medium term load balancing in power grids with a high share of solar and wind power. In the areas of flexibilisation of energy generation and consumers, energy efficiency and smart grids, the state capital Dresden will prepare the results from WindNODE for municipal institutions, companies and citizens' associations, evaluate them with regard to their implementation and use them for the development of pilot projects. At the same time, we are studying municipal flexibilisation options using the example of Dresden’s waste water disposal. The results and conclusions are to be incorporated into an overall study that deduces options, recommendations and a guideline for action for the municipality.
In the scope of this project, the Borderstep Institute brings together the results from the workstream with regard to the potential usefulness of districts, the possible contribution of the building sector to the energy transition and the use of renewable energy in districts including its conversion to heat (Power-to-Heat). We then make comparisons with other research areas to study the transferability of the developed solutions to districts of varying technical complexity. The comparison projects are selected to represent different approaches, including a comprehensive district design with Power-to-Heat installations to reduce the primary energy need and a district with a cogeneration unit, innovative high temperature storage units and a steam turbine for CO2-free reconversion into electricity.