Researchers at SINTEF and COWA Thermal Solutions are developing a heat storage system for heat pumps, a significant advancement in home energy technology. The system utilizes salt hydrates to store heat efficiently, allowing for on-demand distribution. This innovation addresses the intermittent nature of heat demand, promoting smarter energy usage and reducing grid strain.

This new technology functions like a "thermal battery," storing excess heat when electricity is cheap and releasing it when needed. The system, which takes up less space than traditional hot water tanks, also boasts rapid charging and heat release. The team has improved the efficiency of the thermal batteries from 65% to 85% by using thin cooling fins.

These thermal batteries are designed to improve the performance of heat pumps in private homes. The system can store more energy than water. The salt hydrates used are non-toxic and inexpensive. The Sure2Coat project is part of the EU-funded project, collaborating with other companies to develop new surface treatments and coatings.

Looking ahead, this technology has the potential to make heat pumps more efficient and cost-effective. By enabling heat storage, it can pave the way for a more sustainable energy future. The ability to store and distribute heat on demand is a critical step towards grid stabilization and reducing reliance on fossil fuels. We can expect to see more of this in the coming years.