Duration: 01.09.2021 - 30.09.2023

Funder: BMWi, WIPANO-Initiative

Partner outside the TU: Fraunhofer CSP, WAVELABS Solar Metrology Systems GmbH, Verein Deutscher Ingenieure e.V.

Editors in the field of building systems and building technology

Prof. Dr.-Ing. Sabine Hoffmann, Dr. Sarith Subramanian, Dr.-Ing. Katharina Boudier

Short description

The KLEMS project refers to the "development of a test standard for determining the angle-dependent solar radiative transmission of building components". The project is financed by the BMWi's WIPANO initiative.

The project aims to develop a cost-effective and scalable test procedure to measure the angle-dependent transmission of radiation in building components, including shading devices, using LED-based solar simulators. The goal is to improve the energy efficiency of buildings by providing accurate measurements for simulation models used in the design of building envelopes and lighting systems. The project includes four partners: Fraunhofer CSP, WAVELABS Solar Metrology Systems GmbH, Verein Deutscher Ingenieure e.V. and RPTU (GST group in the field of civil engineering).

The specific goals of GST are to determine the necessary angle-dependent information for the solar transmission rate of complex shading systems for building envelopes, to reduce the discretization of the Klems method to incorporate measurement results into simulations with reduced computational effort, and to develop a validated tool for simulating the energy behavior of Facades with shading systems based on the measurement method specified in the test standard. The researchers at GST have already achieved research results on building physics problems in connection with dynamic facades and directional shading systems and have developed new simulation methods that they have tested on real shading systems. GST is also well networked with international research institutes and manufacturers of construction and physics software.

The project results will be disseminated through various scientific channels and the project partners plan to expand the testing infrastructure for standard testing of shading systems and to commercialize the developed measurement technology. The standardized tests enable the evaluation and optimization of existing shading systems, and the development of numerical optimization techniques for shading systems will be a future scientific challenge.