| Title |
Optimal Scheduling of Ice Storage System with Prediction of Cooling Loads |
| Authors |
이경호 ; 최병윤 ; 주용진 ; 이상렬 ; 한승호 |
| Keywords |
Ice storage system ; 빙축열시스템 ; Optimal operation ; 최적운전 ; Dynamic programming ; 동적계획법 ; Energy saving ; 에너지절약 ; Cost saving ; 비용절감 |
| Abstract |
This paper describes an optimal control scheduling of an encapsulated ice storage system with a chiller of nominal chiller 34 RT (103,200 kcal/hr) and an ice storage tank of 170 RT-hrs (514,080 kcal). The optimization technique used in the study is dynamic programming. The objective function is summed cost during a day including charge and discharge periods. Control strategies being used commercially are chiller priority and storage priority control. In chiller priority control, the chiller is allowed to run at full capacity during the day, subject to limitations of the building load, and the ice is only melted when and if the load exceeds the chillers full capacity. In contrast to chiller priority control, the aim in storage priority control is to melt as much as ice as possible during the day time period. The system simulation calculates the operation costs for the three control strategies in the condition of the same cooling load and the same ice storage system. The simulation period is a day, assuming that initially the tank is stored fully and the cooling load is perfectly predicted for the scheduling. Also Final state of the tank is to be charged fully. |