Storage Integration in Office Building into FutureBase
Project duration: 11/2016 – 08/2019
Funded by: BMVIT
Programme: Stadt der Zukunft
Call: SdZ 2. Ausschreibung 2014
Concerning energy efficiency, a resilient city also promotes energy consumption at the same spot as it was gained. Therefore, several different opportunities such as Demand Side Management, predictive control of heat and cooling loads or battery storage systems are accessible.
Within this research project a demonstration object for battery storages in office buildings should be realized to accelerate this underrepresented field of application. Thus, a zincbromine redox flow battery will be used which has a higher energy density and lower electrolyte costs compared to other redox-flow batteries. The battery should be implemented in the planned office building Tech2Base in Vienna´s 21st district.
Following questions should be answered within the project:
- Integrated planning: A more intensive integration of single engineering disciplines becomes necessary due to increasing complexity of building technologies. Therefore an electrical and architectural concept for the integration of a battery storage is elaborated and analysed which technical or regulatory difficulties and barriers occur e.g. which additional tasks have to be coordinated with other disciplines. This should conclude in an informative paper for planers and builders.
- Energy management: To optimize the use of a storage system in case of in house energy consumption and shaving peak loads, an energy management system will be developed. This should enable an autodidact battery operation to maximize PV energy consumption and minimize peak loads. TU Vienna will be responsible for elaborating an autodidact artificial neuronal network for consumption prediction. Together with predicted PV yield and model predictive control (MPC) the optimal load- and discharge schedule is created.
- Electrical safety concept in case of isolated operation: to ensure operation of important building parts in case of power failures, a battery should enable isolated operation. Currently, it is still uncertain if electrical security devices respond accurate in case of isolated operation. Thus a lab test series with the battery in combination with different inverters should clarify this uncertainty.
- Operational experiences: During an operation phase of one and a half years, know how concerning the technology is gathered and both function of energy management system and battery technology is analysed. Special focus is set on energy flow, power ramps, availability and power-quality
- Consumer survey: At the building entrance, the storage system should be visualized for information purpose. Within the last project phase, the tenants will be asked for their opinion concerning the benefits and disadvantages in relation to the battery storage system to gain knowledge about technology acceptance.
- Ecological analysis: Ecological benefits should be a clear advantage of battery storage systems, therefore a lifecycle assessment should highlight if energetic amortisation of the storage system is feasible due to maximized in house consumption. In conclusion, the battery will also be compared to Li-Ion, Vanadium and Zinc-Iron Redox-Flow systems in terms of ecological footprint.
We gratefully acknowledge the financial support provided to us by the BMVIT and FFG (Austrian Research Promotion Agency) for the SPIN.OFF project within the programme “Stadt der Zukunft”.