Phase-change slurry storage

Phase-change slurries consist of a phase-change material and a carrier liquid. A dispersion is formed which remains fluid, independent of the physical state of the phase-change material. Its viscosity depends on the concentration of dispersed PCM.

Cold Storage

R&D Services

Our R&D services comprise:

Integration of cold storage devices in supply system designs

Long-term measurements, operation analysis and optimization

Load and storage management

for operating electrical heat pumps and chillers in a way that is compatible with the grid

Optimal dimensioning of storage systems

and the efficient activation of a building’s thermal mass to carry out load shifting

Development of compact cold storage systems that use latent storage materials

Around half of all office and administrative buildings in Germany are equipped with cooling or air-conditioning systems. Many studies forecast that the energy demand for building cooling in Germany and Europe will continue to rise. It is assumed that by 2015 at the latest, most new commercial buildings will be furnished with cooling or air-conditioning systems, and that significant numbers of such systems will be retrofitted in existing buildings. High peak loads are created throughout the course of a day, which require cold generation systems to be designed accordingly and also place a great deal of stress on the electricity network.

This scenario particularly lends itself to the use of sensitive and latent cold storage systems. Transient cold water storage reduces the cooling capacity needed, exploits free cooling using ambient air, and enables cold generation systems to be operated efficiently in terms of their energy use and cost. Furthermore, cold storage leads to a redundant, secure supply of cooling.

Within the Cold Storage research topic, we develop and evaluate cold water and latent cold storage systems, and investigate how large-scale storage systems can be integrated into buildings. In addition, we devise concepts for using a building’s mass to store cold and research the interactions between cooling, storage systems, buildings and the energy supply network.