Workshop: Netzdienliche Gebäude und Quartiere auf den Berliner Energietagen
Ort: Fachmesse Energie-Impulse – 10623 Berlin

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Alliance Project - Net reactive Buildings (NReB)

"Holistic assessment of building physics and building energy systems, including their role in energy economy: energy, exergy and input power and power output”

The focus of energy transition is to decrease the use of central and conventional supplies (i.e. fossil fuels) and increase the use of decentralized and renewable energy based supplies (i.e. RE systems).

The building sector is responsible for about 40% of total energy consumption in Germany. It is crucial, in the long term, to optimise demand and improve both building efficiency and energy supply networks. This is essential for the success of an effective energy project.

The project strategy has been followed to develop and investigate the implementation of renewable energy sources in the supplying of power. There are many challenges associated with the application of non-adjustable and fluctuating renewable energies (RE) in the municipal supply network. The increased fluctuation of excess supply and supply shortages from wind and solar energy in the area of electricity is already pushing its limits within networks.

These shortages in supply could be dealt with either through the use of storages or through so-called “load transfer measures”. The storing of energy is, however, often connected with technical problems. Therefore, it is necessary to search for alternatives.

The use of heat pumps and combined heat power (CHP) is suitable as a so-called "load transfer measure". With the help of these measures, it is possible to use the excess power at a targeted, later point in time. Intelligent electricity networks (smart grids) can be used for the control of these measures.

In order to face this challenge, a team of researchers at the Fraunhofer Institute for Solar Energy Systems (ISE) (project leader) is working in close cooperation with the Fraunhofer Institute for Building Physics (IBP) and the E.ON Energy Research Center within the framework of the four-year research project "Net-reactive Buildings".

This alliance research project is focused on the holistic assessment of building physics and building energy systems at a community scale.

Current project objectives are: