Technische Universität Kaiserslautern (Germany)
Facing climate change: a holistic approach to the energy efficiency of buildings
To limit the negative effects of climate change, Europe and Germany, in particular, are pursuing challenging climate protection targets. By the year 2050, extensive greenhouse gas neutrality shall be achieved in Germany. Ambitious measures are needed to achieve these goals. With a current share of 35 per cent of German final energy consumption, the building sector is particularly important for reaching the national climate protection targets. Currently, the key requirements for the energy efficiency of buildings in Germany are regulated in the Energy Saving Ordinance (EnEV). For new buildings, the main requirement is to limit the annual primary energy demand resulting from heating, cooling, hot water supply, ventilation and lighting.
When assessing the energetic building quality, only the primary energy demand during the period of use is taken into consideration. The energy expenditure for the construction and maintenance of a building is completely overlooked. New buildings have a very low energy demand in the period of use due to their high energy efficiency, and ignoring construction and maintenance is no longer justifiable. Investigations using the example of a new multi-family home over a 50-year period have shown that the energy expenditure for the building construction and maintenance is 73 per cent compared to the primary energy demand for building operation. Neglecting the energy used in construction and maintenance of buildings can therefore lead to unfavourable building concepts in terms of climate protection targets. During the presentation, Schoendube will present the normative and legal building energy efficiency requirements in Germany and the associated European regulations, and compare these to Australia’s requirements. Building on this, he will present the new approaches for incorporating energy expenditure for construction, period of use and maintenance.
Schoendube has studied civil engineering at Glauchau University of Cooperative Education, and building physics and building energy optimisation at Bauhaus-Universität Weimar. Over his career he has held a variety of consulting and principle engineering positions focusing on building physics. Since 2015, Schoendube has been a research associate and chair of building physics/energy efficient buildings at Technische Universität Kaiserslautern. His research focuses on nearly zero-energy buildings, heat storage capacity and summer heat protection of buildings.