Thermal Energy Storage (TES) Tanks are another energy efficient element of a district cooling plant. TES tanks can reduce refrigerant plant capacity and operational costs, producing chilled water when demand is low. The TES Tank allows reductions in CO2 as well as significant energy savings, due to storing the energy and improving operational efficiency.

Thermal energy is produced during periods of off-peak electrical demand (or usage), collected in a thermal energy storage tank, then withdrawn and distributed to the facility during on peak periods.

Warm and chilled water enters and exits the tank through diffusers located at the top and bottom of the tank.

These diffusers are designed to eliminate turbulence and allow the water in the tank to stratify, with the colder (and denser) water at the bottom and the warmer water at the top.