Modeling partial charging and discharging of area-constrained ice storage tanks

Although several models have been developed and validated for predicting th e performance of indirect, area-constrained, ice-on-pipe storage tanks, non e have fully considered operation involving partial charging or discharging . In this case, multiple layers of ice and water may coexist around the hea t exchanger tubes. This paper presents two models for predicting the behavi or of tanks with partial charging and discharging processes. One model is b ased upon physical principles and is useful for studying design and control issues through simulation. The second model involves the use of an empiric al correlation and is useful for simulating an existing design or could be appropriate for on-line control. Both models were validated using experimen tal results for a range of charging and discharging scenarios.