Scanning elctron micrograph (SEM) of Phase Change Materials PCM

The scanning electron micrograph gives a qualitative impression of the size distribution of the paraffin microcapsules. Large capsules (app. 5 µm) and many small capsules can be seen. Whereas the number of small capsules is much greater than that of large ones, their volume percentage is small.

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.

Thermal Storage for Buildings

Our Fields of Work include:


Latent Heat Storage


Cold Storage

Most of the final energy in buildings is consumed as heat or cold. Marked fluctuations in the demand occur on a daily, weekly and even seasonal scale, which can lead to load peaks that are too high to be met by the heating or cooling systems. Additionally, the demand profile often does not match the availability of the renewable energy supply. Such mismatches often are compensated with an over-dimensioned supply system and thus inefficient operation. On the other hand, the share of renewables in the supply remains low.

With the use of thermal storage systems, cold and heat provision can be shifted through time thus decoupling the time of supply and demand. Storage systems are an important component when dimensioning supply systems which use renewable energy.

At Fraunhofer ISE we develop and optimize chillers and cooling systems for buildings and industrial applications. Our work extends from the development of new materials and of storage media with higher energy capacity through to optimizing storage efficiency and the operating efficiency of storage systems.

Stefan Gschwander

Contact Press / Media

Stefan Gschwander

Thermal Storage for Buildings

Fraunhofer ISE
Heidenhofstr. 2
79110 Freiburg

Phone +49 761 4588-5494

Current publications - Thermal Storage for Buildings


YearTitle/AuthorDocument Type
This publication list has been generated from the publication database Fraunhofer-Publica.