Tank size and operating strategy optimization of a stratified chilled water storage system

► We presented a method of finding the optimal tank size and operating strategies. ► This method was illustrated with a new chilled water storage project. ► The results show that a 3.5 million gallon tank has the shortest simple payback time.► Full storage is selected in summer and storage-priority is selected in winter. ► The annual billing cost savings are estimated at $907,231.