Heat-Resilient Buildings - interaction of heat adaptation measures in buildings and open space, indicator-based overheating assessment, implementation dynamics and health aspects

Problem statement

Heat stress in buildings continues to increase due to ongoing global warming and increasing sealing, especially for buildings located in city centres. However, the current state of research still shows numerous uncertainties regarding the evaluation of overheating in buildings. For example, there is no internationally uniform standard on how to evaluate the overheating of the interiors of residential buildings. In addition, most scientific work focuses on case studies for a specific location without making a spatial comparison between urban and rural areas or between different regional climates within a country. The interaction between heat adaptation measures in open spaces and buildings has also been insufficiently researched so far, as well as the reasons for the observed low implementation dynamics of climate change adaptation measures. The HeatResBuild project aims to address these relevant research gaps in connection with the IOER research projects HeatResilientCity, Klimakonform and SYSDYM and to develop approaches to solutions.

Project Content

In the HeatResBuild project, overheating of buildings is investigated from several perspectives and the following focal points are examined:

  1. By applying the model chain from microscale urban climate simulation (carried out by the partner TU Dresden and the UFZ) to building performance simulation (see figure below), it is analysed to what extent cooling effects of heat adaptation measures in the open space affect the overheating in buildings. The opposite direction, to what extent measures on the building side affect the micro-scale urban climate and thus ultimately also the building comfort, can also be illuminated with this approach as well. Example neighbourhoods in this project are the German cities Dresden-Gorbitz, Erfurt Oststadt, Plauen Südostvorstadt and Naumburg Altstadt. This part of the project is done in cooperation with the HeatResilientCity II and the KlimaKonform project.
  2. The impact of different regional climates and the heat island effect on overheating in buildings is investigated using an approach in which meteorological measurement data from the German Weather Service over the last 30 years is statistically evaluated for six different locations in Germany. For each location, an average summer over the last 30 years is determined, as well as a future average summer in 30 years using climate projections. In addition, the urban island effect (carried out by the partner TU Dresden) is examined for the different locations to determine to what extent the overheating in the building differs depending on whether it is located in the city or on the countryside. The effect of the different meteorological data sets on overheating in the building is evaluated by means of building performance simulations. This topic is being worked on in cooperation with the HeatResilientCity II project.
  3. While several indicators for the evaluation of overheating in buildings exist, their significance is limited. Building on these existing indicators, the evaluability of overheating in residential buildings is to be improved and more precise scientific but also practical indicators developed. This topic is also being worked on in cooperation with the HeatResilientCity II project team.
  4. The implementation dynamics of heat adaptation measures in open spaces and on buildings is currently very low in practice. The causes of this low dynamics are to be researched using system dynamic approaches based on the SYSDYM project.

Research Questions

In the HeatResBuild project, overheating of buildings is investigated on different focal points:

Which sets of indicators can be used to assess overheating in buildings appropriately, both scientifically and in practice?

Is a building that is heat-resilient in Dresden also heat-resilient in other German cities such as Hamburg or Stuttgart? How great is the influence on overheating of dwelling whether the building was constructed in the city centre or in the surrounding countryside?

What effects do adaptation measures against summer heat in open spaces have on the overheating of indoor spaces in buildings and vice versa?

How can the implementation dynamics of adaptation measures against summer heat be significantly increased?

The Leibniz Institute of Ecological Urban and Regional Development is jointly funded by the federal government and the federal states.

FS Sachsen

This institute is co-financed by tax funds on the basis of the budget approved by the Saxon State Parliament.