There has been a significant amount of interest in volume required for proper operation of chilled water systems. The following is a spreadsheet that will help in calculating system volume. A comprehensive approach to system design can minimize the power draw of the entire system are inherently easier to control for highest eficiency, lower first costs and lower energy costs. Right-sizing equipment means smaller electrical conne tions—a great. RECO Commercial Systems' thermal energy storage tanks are used for storing thermal energy in chilled water district cooling systems. TES tanks take advantage of off‐peak energy rates by cooling water during these hours (usually overnight) and using it during high‐rate hours (usually daytime). On the second sheet, various storage tank sizes are listed with their associated dimensions and weights. The. Thermal Energy Storage (TES) for chilled water systems can be found in commercial buildings, industrial facilities and in central energy plants that typically serve multiple buildings such as college campuses or medical centers (Fig 1 below).