Test stand for thermodynamic measurement of small adsorbers

Heat Transfer in Building Energy Systems

R&D Services

Our R&D services comprise:

Measuring material properties

such as thermal conductivity, porosity, surface texture, etc.

Determining heat transfer coefficients

for different applications and combined heat and mass transfer parameters (adsorption kinetics)

Measuring and evaluating heat exchangers

for different building services applications

Simulation-based mapping and evaluation of flow structures and heat exchanger geometries

Tools such as COMSOL Multiphysics, OpenFOAM, CoilDesigner, IMST-ART and Modelica, as well as our own software, are used depending on the question/level of detail.

Simulation-based and /or experimental evaluations

of components in the context of real applications, e.g. using multiscale simulations or HIL test stands

Improving the efficiency of heat transfer is key to boosting the efficiency of buildings services systems that supply heating, cooling and air conditioning.

Efficiency here should not only be understood as the efficiency of the heat exchanger itself, but is ultimately defined by the potential for efficiency increases in the systems engineering:

  • Decreasing hydraulic losses enables reductions in the specific power consumption of the system.
  • Reducing the temperature difference driving force enables a more optimal thermodynamic working cycle and in practice can, for example, allow the compression ratio (electrical heat pumps) to be decreased.
  • Optimizing the heat exchanger geometry can bring about reductions in component size, thus improving power density, saving materials and lowering costs.


The criteria listed here span a complex array of development requirements. These are formulated together with partners for specific applications and then addressed using suitable methods and tools. We are able to draw on many years of experience, particularly in the fields of sorption technology, heat pump technology, and air-conditioning and ventilation technology.