Energy storage water cooling tube test method

What is thermal energy storage for space cooling?

Thermal Energy Storage (TES) for space cooling, also known as cool storage, chill storage, or cool thermal storage, is a cost saving technique for allowing energy-intensive, electrically driven cooling equipment to be predominantly operated during off-peak hours when electricity rates are lower.

How are cooling loads measured?

In conventional air conditioning system design, cooling loads are measured in terms of "Tons of Refrigeration" (or kW’s) required, or more simply "Tons”. For chilled water or ice storage systems, designers select chillers based on the “Ton-hours” of cooling required.

How do thermal energy storage systems work?

Fig. 1 Central Energy Plant at Texas Medical Center Thermal energy storage systems utilize chilled water produced during off-peak times – typically by making ice at night when energy costs are significantly lower which is then stored in tanks (Fig. 2 below).

How is cooling water treated?

Treatment of cooling water will be different depending upon the kind of system in use. Here are the basic types: once-through cooling system pumps water into equipment where it passes over a hot surface in order to cool it. The water then exits the equipment, taking heat with it.

What is the difference between heat absorbing capacity and thermal energy storage?

The difference lies in the heat absorbing capacity. Thermal energy storage (TES) is a method by which cooling is produced and stored at one time period for use during a different time period. Air conditioning of buildings during summer daytime hours is the single largest contributor to electrical peak demand.

What is a heat transfer fluid?

The heat transfer fluid may be the refrigerant itself or a secondary coolant such as glycol with water or some other antifreeze solution. Storage volume is generally in the range of 2.4 to 3.3 cubic feet per ton hour, depending on the specific ice storage technology.