The energy-efficient Charlottenburg university campus, which has been developed by the Technische Universität Berlin and the University of the Arts, is being developed in the centre of Berlin. An energy efficiency master plan is aimed at establishing an innovative heating management system via an integrated energy network. The goal is to achieve an energy-efficient and economic optimum by means of energy savings, local generation of renewable energies and energy storage. The campus will serve as a model for district refurbishments and is set to achieve the national climate protection targets as a learning and testing laboratory by 2025.
Despite the introduction of active energy management, the final energy demand for the Berlin-Charlottenburg university campus (HCBC) amounted to about 100 GWh in 2011. This equates to a primary energy requirement of approximately 140 GWh p.a. for the existing plant technologies. Whilst 30% of the final energy for the electricity already comes from renewable sources, this is by no means the case with the heating. The aim of the project is therefore to combine proven technologies to enable an economically and energy-efficiently optimised interplay of energy saving, renewable energy generation, storage, distribution and utilisation to achieve the “Wärmewende” – the “heat transition” – on the campus. The backlog of refurbishment required at the HCBC site amounts to 300 million euros. In the coming years, it is intended to reduce this in a sensible manner based on the energy master plan and its holistic concept. The research project is predominantly a realisation measure with a preceding analysis and conceptual phase (2016-2018). In addition, recommendations for action are being developed to enable the results to be transferred to other urban areas.
The aim of the project is to achieve an economically and energy-efficiently optimised combination of energy savings through energy-efficient building refurbishment and the local generation of renewable energy. By means of an integrated energy network, the energy within the campus shall be distributed sensibly on this basis. The decisive feature here is the shifting of the thermal energy balance limit from the buildings to the district. A major focus is on generating energy locally where favourable conditions prevail, as well as on the subsequent shifting of the heat energy flows. This will create a new kind of heating network that gathers and utilises heat beyond the confines of the buildings. In order to shift and store the energy it is planned to use and, if necessary, expand the almost self-sufficient district heating network available on the campus. Superordinate district energy management will ensure an optimised energy flow beyond the building confines during operation. In addition to technologies already available in the market, advanced technologies developed at the TU Berlin and other scientific institutions will also be integrated.
District concept and urban development
The goal is not to renovate building after building according to the EnEV standard – as would normally be the case. This would not be financially feasible for the campus as a whole. For this reason it is planned to expand the balancing limit: The entire campus will be considered as a unit and measures such as the partial renovation of buildings and systems technology, renewable production of energy on the campus, utilisation of waste heat, storage and redistribution will be sensibly harmonised with one another by an internal campus heating network.
With new-build schemes and previously planned comprehensive building renovations, it shall be ensured that the heating systems are conceived for low temperatures to enable renewable energies and waste heat to be used more effectively. Since the research project is primarily intended to serve the implementation of the energy-efficient campus, the executive and building management of the two participating universities are already being closely involved during the concept development.
All individual measures shall be valued in terms of the costs and bundled into packages of measures. These shall in turn be combined into economically and energy-efficiently optimised concept proposals for different scenarios.
Basic data for the district
|Gross area - before||approx. 500.000 m²|
|Number of jobs in the district - before||8.391, approx. 48.000 users (employees & students)|
|Energy provision||Heat: Vattenfall: 100 % district heating; electricity: E.ON: 100 % green electricity|
|Network operators||District heating: Vattenfall heat; electricity: Stromnetz Berlin|
Energy data for the district
|Used primary energy carrier (Electricity / Heat)||Electricity 2015: 100% green electricity, Heat 2015: 100% district heating|
|Gross area||approx. 500.000 m²|
|Ultimate energy demand (Heat, after DIN V 18599)||130 kWh/m²a|
|Ultimate energy demand (Electricity, after DIN V 18599)||80 kWh/m²a|
|Primary energy demand (Heat, after DIN V 18599)||73 kWh/m²a|
|Primary energy demand (Electricity, after DIN V 18599)||144 kWh/m²a|