Potential of solar control solutions and ventilation for reducing overheating risk in retrofitted Danish apartment buildings from the period 1850-1970. Technical report

This technical report summarizes the work on the research project "Reduction of overheating in multi-storey apartment buildings in connection with facade renovation". The project was carried out at the Section for Energy and Services, Department of Civil Engineering at the Technical University of Denmark in the period 1 January 2016 - 31 December 2018.

The total budget for the project was DKK 1.98 million, where the Landowners' Investment Foundation (Grundejernes Investeringsfond) supported with DKK 990,000. The objective of the project was to evaluate the potential of different solar control solutions combined with typical ventilation strategies to reduce indoor temperature excess in renovated Danish apartment buildings from the period 1850-1970.

The target group for the project was the construction industry, building owners and residents, the community in general and the international research world. The project dealt with a thorough examination of the overheating risk and the determination of possible solutions, based on dynamic computer simulations in IDA Indoor Climate and Energy (IDA ICE) software.

An MS Excel based tool called “Result Browser” was prepared to give the user possibility to explore the project results from over 400 cases. This report describes the cases studied and the models used in details. The results regarding the effect of different windows type, solar shading solution and ventilation strategies on overheating and energy consumption based on over 700 simulations performed in IDA Indoor Climate and Energy (IDA ICE) software are discussed in the report.

The research group hopes that this study will contribute to an increased attention regarding the use of solar shading and ventilation during energy renovation. The authors would like to thank all master and bachelor students from DTU BYG who have contributed to the project.