Thermal Energy Storage Tank Calculation

In last month s article we described the rationale for using thermal energy storage tes to reduce peak electrical demand costs.

Thermal energy storage tank calculation.

1 btu british thermal unit 1055 06 j 107 6 kpm 2 92875x10 4 kwh 251 996 calorie it international table calorie 0 252 kcal 777 649. Thermal energy storage technology the system essentially consists of a storage medium a tank a packaged chiller or built up refrigeration system and interconnecting piping pumps and controls. Thermal energy storage tes thermal energy storage commercialized over 30 years ago thousands of installations throughout the gcc world and the u s. Thermal energy storage tes is achieved with widely differing technologies depending on the specific technology it allows excess thermal energy to be stored and used hours days months later at scales ranging from the individual process building multiuser building district town or region.

Usage examples are the balancing of energy demand between daytime and nighttime storing summer. Steel or concrete tes tanks. The thermal storage usually consists of two salt storage tanks. In this month s article we will go further into the calculations required for sizing as well as some design considerations and heat transfer media.

Thermal energy storage tanks. The tank is insulated so salt. In this case the closed loop with the heat transfer fluid is passed through one of the salt tanks where salt is heated to the temperature of 384 o c. The ice storage tank is another option which generates ice on cooling coils.

Our most popular tank is the stratified water tank in which natural stratification separates the warm and cold water. Million gallon tank has the shortest payback time and the projected total capital cost is within the budget. A solar energy water buffer tank with 200 us gallons is heated 200 o f. Thermal energy storage tank overview micah j.

The solar energy stored can be calculated as. The annual billing cost savings are 907 231 and the simple payback time is 12 5 years. Thermal energy chilled water or hot water is produced during periods of off peak electrical demand or usage collected in a thermal energy storage tank then withdrawn and distributed to the facility during on peak periods. Introduction thermal energy storage tes technology is often used to reduce the operating costs by shifting.

Above ground or underground tes tanks. To extend the steam generation beyond sunshine hours molten salt thermal energy storage is used. Example solar energy stored in a 200 us gallons water tank.