SPIN.OFF - Integration of storage systems in the office building Tech2Base
Starting point / motivation
In the face of advancing climate change the development of resilient cities and urban quarters with high resource and energy efficiency becomes more and more important. Energy supply based on regional renewable resources is a key component. In this context the fluctuating generation is one of the main challenges. For this reason storage options and demand side management measures become more and more important.
Contents and goals
So far there is hardly any experience concerning the integration and operation of battery storage systems especially in commercial and industrial buildings. For this reason this research project aims to integrate a zinc-bromine redox flow battery storage system in the Tech2Base, which is a planned office building in Vienna’s 21st district. In scope of this demonstration object questions along the implementation and operation process should be answered.
A very important aspect is integrative 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 battery storage systems is elaborated. In addition technical, legal and regulatory barriers will be identified. This should conclude in an informative paper for planers and builders.
Beside the electro technical integration, the integration of the battery storage into the energy management system of the building is an important aspect. To ensure an ideal interaction of all components, a self-learning energy management system will be developed. This should enable an autodidact battery operation to maximize PV-energy consumption and minimize peak loads. Therefore an autodidact artificial neuronal network for consumption prediction will be developed. 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.
Furthermore the battery systems should allow isolated operation to ensure operation of important building parts in case of problems with the general power supply. Currently, it is still uncertain if electrical security devices respond accurate in case of isolated operation. Thus a test series in combination with different inverters in the Hybrid Energy Lab of the University of Applied Sciences Technikum Vienna should clarify this uncertainty.
During an operation and monitoring phase of one and a half years, know-how and experience concerning the operation of battery storage systems in commercial and industrial buildings is gathered and the functionality of the energy management system and chosen battery technology can be analysed and improved. Special focus is set on energy flow, power ramps, availability and power-quality. Furthermore a lifecycle assessment of the battery storage will be performed, to clarify the environmental effects of zinc-bromide redox flow technology. Finally, the results will be compared with other battery technologies.
At the end of the monitoring phase the tenants and users of the Tech2Base will be asked for their opinion concerning the benefits and disadvantages in relation to the battery storage system to gain knowledge about technology acceptance. To increase the awareness, the storage system will be visualized at the building entrance for information purpose.
On the basis of this demonstration object questions arising along the implementation and operation process should be answered.
Kurt Leonhartsberger, MSc., Technikum Wien GmbH
Project or cooperation partners
ATB Becker e.U.
Blue.Sky Energy GmbH
University of Applied Sciences Technikum Wien