Thermochemische Materialien zeigen vielversprechenden Weg zur Verbesserung der Raumheizung | In thermochemischen Materialien gespeicherte Energie kann Innenräume, insbesondere in feuchten Regionen, effektiv heizen.

From the article: Energy stored in thermochemical materials can effectively heat indoor spaces, particularly in humid regions, [according](https://www.sciencedirect.com/science/article/pii/S0306261924016015) to researchers with the U.S. Department of Energy’s National Renewable Energy Laboratory (NREL).

Working with industry representatives and researchers from Lawrence Berkeley National Laboratory, the scientists determined a realistic configuration for integrating thermochemical materials (TCMs) into a building’s HVAC system. Salt-hydrate TCMs are considered promising candidates for providing load flexibility to a building’s heating system. This flexibility could allow for reduced electrical requirements for the heating system or load shifting to times when electricity is less expensive and/or cleaner.

The TCM is discharged and charged through hydration and dehydration reactions, respectively. Hydrating the salt releases heat, which is used to heat the building, and extra heat from the heat pump at other times of day is required to dehydrate, or charge, the TCM. This means the reactor needs to interact with water vapor. This water vapor could come directly from the ambient air, in which case the TCM is an open system. Or the TCM could be in an isolated chamber, evacuated of air, which is known as a closed system. In this case, the water vapor comes from evaporating liquid water from a second chamber.