A simplified ice storage system model was developed in which the icemaking mode is reflected by a higher power consumption per unit cooling than in chilled-water mode. The performance of four control strategies for ice storage systems is evaluated. The four control strategies investigated are chiller-priority and constant-proportion as conventional, instantaneous controls, while storage-priority and optimal control represent sophisticated controls employing load forecasting. Six parameters were investigated with respect to their influence on the ice storage system performance: Storage losses, utility rate structures, rate periods, penalty for icemaking, storage capacity, and the impact of load forecasting. Optimal control was determined to provide maximal operating cost savings. The storage-priority control yields operating costs only slightly higher than those of optimal control. Chiller-priority control realized savings that were typically on the order of 50% of what is theoretically possible (optimal control). Constant-proportion control proved to be a simple control strategy yielding higher savings than chiller-priority, yet lower than storage-priority control.
Parametric Study of a Simplified Ice Storage Model Operating Under Conventional and Optimal Control Strategies*
Contributed by the Solar Energy Division of the American Society of Mechanical Engineers for publication in the ASME JOURNAL OF SOLAR ENERGY ENGINEERING. Manuscript received by the ASME Solar Energy Division, March 2002; final revision, May 2002. Associate Editor: M. Olszewski.
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Henze, G. P. (January 27, 2003). "Parametric Study of a Simplified Ice Storage Model Operating Under Conventional and Optimal Control Strategies." ASME. J. Sol. Energy Eng. February 2003; 125(1): 2–12. https://doi.org/10.1115/1.1530629
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