Know-How-Plus - Options and constraints of building renovation towards plus energy building standard
Starting point / motivation
The paradigm change towards a sustainable development induces a constant improvement of the building energy standards from low-energy buildings via passive houses to plus energy houses. The consequence of these energy-efficient building standards is, that the cumulative energy demand for maintenance and disposal processes becomes more and more important compared to the energy demand for heating. Therefore, the building processes (maintenance, refurbishment, cleaning, dismantling) over the whole life cycle of buildings must be regarded in a holistic way in order to avoid a shifting of the energy and climate protection problems from one life cycle stage to another.
Contents and goals
Promotion of high-quality building refurbishments according to plus energy building standard from a holistic point of view by means of a potential analysis of the plus energy house technology related to the Austrian building stock. (Life cycle assessment of about 150 construction details)
Knowledge of the significant factors influencing the cumulative energy demand and emissions of the use and demolition phase to deduce the optimization potentials in the respective operational fields.
Increasing the efficiency of energy and resources by using the construction-oriented manual for interdisciplinary system development which means maintenance-, refurbishment- and recycling-optimized constructions.
Methods of treatment
Qualitative and quantitative life cycle evaluation of approximate 180 details via evaluation raster and create a construction-oriented manual;
Modelling of the Austrian building stock;
Calculation of Potential savings in buildings by refurbishment towards plus energy building standard
Results / conclusions
A construction-oriented manual on the basis of the life cycle assessment results of approximate 180 details and descriptions of refurbishment measurements regarding the options and constraints of building renovation towards plus energy building standard
The created model of Austrian building stock was used for the calculation of the surface area of building envelope and useable areas for solar heat and photovoltaics
The reduction of the heating demand was calculated for reference buildings according to building age and type.
The potential savings of energy consumption and CO2 emissions by refurbishment of the Austrian building stock towards plus energy building standard are shown with best and worst case scenarios.
- Univ.-Prof. Dr. Peter Maydl
Graz University of Technology - Institute of Technology and Testing of Building Materials
- AEE INTEC - Institut for Renewable Technologies