The Stratified Thermal Energy Storage (TES) tank is a widely proven technology that collects excess process thermal energy to be used during load peak time. By producing chilled water during night and using it during daily peak hours we obtain several advantages.
The TES technology in combination with TIAC allows for a reduction in operation costs and refrigerant plant capacity requeriments. ARANER provides and designs Ice storage, Stratified water storage or Salt storage. Our in-house technology provides state-of-the-art thermal storage systems, resulting in better performance and reduced charging times.
ARANER has supplied design and consultancy for more than 100 Thermal Energy storage systems.
In a naturally stratified chilled-water storage tank, cool and warm volumes of water are stored together without a physical barrier. A stable density gradient prevents mixing of the two volumes. The stable gradient is maintained during storage and operation by varying the direction of flow throughout the tank. Typically, there will be a 0.4 to 0.6 m thick thermocline (a region with vertical temperature and density gradients) making a separation between the cold and the hot water. In charging mode and discharging, the cool water is introduced and withdrawn at the bottom of the tank while warm water is introduced and withdrawn at the top difusser.
The ARANER-designed diffuser systems help to preserve stratification by minimizing the disturbance caused by inlet and outlet flows, supported by extensive CFD study and R&D of new diffusers.
TES tank reduces operational cost and refrigerant plant capacity. Main advantage is the production of chilled water when electricity demand is low, using the excess of power generation to run the chilling system, coinciding during the night, when ambient temperature is low and chilling system have better performance. Another advantage is the reduction of the chilling plant capacity and operational cost in comparison with an on-line chilling system, which produces delays during periods of low demand.
Maximum efficiency in simultaneous chilled water production and consumption, usage of what you need, storage of excess.
Smaller refrigeration equipment sizes and costs as they are designed for average loads and not for peaks.
Storage the thermal energy and transform it later in electrical energy, with turbine inlet air cooling technology.
Thermal energy production is stored during electricity low-cost periods.
Water or ice storage option available.