Based on the results of the previous project, PCM Demo I, eight partners from research and industry, coordinated by the Bavarian Centre for Applied Energy Research (ZAE Bayern), are currently analysing PCM systems under realistic conditions in seven pilot buildings. The measurement data collected on the performance of chilled ceilings and wall elements with PCM, as well as on PCM storage devices for air conditioning and heating systems forms the basis for further research on the new technology. Before the PCM Demo II project was launched, very little reliable information was available from practice.

PCM melt or solidify, and in the process either absorb or release heat to their surroundings. Buildings can be efficiently heated and cooled with systems employing this ground-breaking technology. Used and adjusted correctly, PCM systems can reduce the need for air-conditioning as well as peak loads. However, measurement data from the PCM Demo II project also shows that these advantages may be ‘watered down’ or even lead to a higher energy consumption if PCM systems are not correctly regulated.

The BMWi project will continue to fund the project until June 2019. In addition to collecting measurement data, the project also seeks to develop useful regulation strategies, to further develop PCM systems and to study the synergy effects of several systems interacting.