Pumped Thermal Energy Storage
Active Energy is using its scientific expertise to help commercialize a new class of energy storage. Pumped Thermal Energy Storage is an economical, safe, and durable form of electricity storage great for long duration applications.
Oak Ridge National Lab is supporting the development of a first prototype
Active Energy is developing ice energy storage for pumped thermal thermal energy storage.
Charging: Electricity is consumed to freeze water
Discharging: Low temperature waste heat (<160°F) powers an engine that operates on a temperature difference, generating electricity and melting the ice in the process
With this system, commercial and industrial producers of low-grade waste heat will be able to generate electricity with the abundant amounts of heat they produce. Here is a short demonstration video: