Online/Vienna, 27th January 2021 – How can we implement the EU guidelines that require all new buildings to be supplied with renewable energy in situ from 2021? This and other questions were posed by the experts at the online kick-off event “Business Treff: With the Energy of the Sun”, which was organized by Vienna City Council, the Vienna Business Agency, Austria Solar, and Photovoltaik Austria.
In his lecture, Michael Haugeneder, Managing Director of ATP sustain Vienna, offered fascinating insights into the EU project CRAVEzero together with Tobias Weiss, AEE INTEC. The research project focuses on the cost reductions offered by nearly Zero Energy Buildings (nZEBs) across their entire lifecycle. “In order to do justice to the requirements of the EU guidelines while also avoiding extra costs, we need new, iterative design processes with their own methods of analysis and calculation”, says Haugeneder. In the research project, the consortium of which ATP sustain is a member developed a range of tools including a “Process Map” that offers an overview of the complexity of and the potential for influencing the design and construction process of nZEBs.
In the second part of the lecture, Michael Haugeneder addressed the design of nZEBs based on the example of the Technology Center Seestadt (tz1): “In order to be able to properly evaluate the effects of a range of options for optimization in design and operation, we carried out a range of variant studies”, he explained. The investigation of tz1 as part of the project CRAVEZero produced a total of around 46,000 such variants. The factors investigated and evaluated with the help of energy and lifecycle cost calculations included the building standard, the energy supply, the ventilation system, solar use, and user behavior.