Fraunhofer Institute of Optronics, System Technologies and Image Exploitation IOSB 
Current situation: energy efficiency and renovation requirements in German residential buildings
In Germany, more than 30% of all energy is used to supply heat to residential buildings. Around three million older medium-sized apartment buildings with 3 to 12 residential units are responsible for a significant proportion of CO₂ emissions in the building sector. In order to achieve the climate targets, the number of renovations would therefore have to be increased from the current 4.1 million to 13-16 million buildings by 2045. Both the replacement of old heating systems and improved insulation of the building envelope are essential here. However, there is often a lack of standardized approaches in planning, and the integration of new technologies, such as heat pumps and PCM storage systems, can be technically very challenging for existing buildings. As a result, many refurbishment projects are severely delayed or even fail altogether.
Project objective
This is where the dynOpt-San project comes in with three key components:
1. The development of a digital refurbishment assistant that supports planners and consultants in the standardized planning, implementation and commissioning of refurbishment measures.
2. The efficient integration of innovative heating technology, in particular PVT heat pump collectors and PCM storage systems, for CO₂-minimized heat and power supply.
3. A self-learning energy management system with integrated operational monitoring that optimizes and monitors the operation of apartment buildings and neighbourhoods.
Synergies and added value
Fraunhofer IOSB's work in dynOpt-San focuses on the development of the energy management system and cloud-based monitoring tools. Building on findings from the predecessor project dynOpt-En, a two-level energy management architecture is being implemented to predictively coordinate energy flows in apartment buildings and districts. In addition to reducing costs and CO₂ emissions, the aim is to achieve an optimal self-consumption rate of generated energy as well as grid-friendly behavior of the neighborhood.
Here you can download the project flyer downloaden (German only)