Latentvarmelager med en indretning til udløsning af krystallisation i et faseskiftmateriale og fremgangsmåde til udløsning af krystallisation i et faseskiftmateriale.

The invention relates to a latent heat storage device with a storage container 1 for receiving a phase change material PCM and a device 7 for triggering crystallization in the phase change material. The initiation of the crystallization in the phase change material is based on the presetting of crystallization nuclei which initiate nucleation in the device according to the invention and the method according to the invention so that a stable phase is formed from the metastable phase under the given conditions. To this end, a gaseous medium enriched with crystallization nuclei (seed crystal) is fed to the phase change material. The latent heat storage device according to the invention has a storage container 1 which is filled with a phase change material PCM except for a residual volume 36 of a gaseous medium.