Research progress on optimization of ice packing factor in ice slurry storage
Increasing the ice packing factor(IPF)in the ice storage tank can effectively improve the economy of the ice slurry storage technology and contribute to the development of centralized cooling and cold-heat cogeneration in our country.Based on the review and summary of the mechanism and model of ice slurry storage,this paper analyzed the key influencing fac-tors of IPF in ice slurry storage,summarized the methods to increase the IPF in the ice storage tank,and the research trend of large-scale ice slurry storage was looked forward.The research results show that the Ostwald ripening and aggregation effects during the ice slurry storage process will increase the size of ice crystals,which is not conducive to the uniform accumulation of the ice-rich layer,so the Ostwald ripening and aggregation effects should be weakened to improve the IPF.Based on the Tanino model,it is experimentally verified that the Ergun equation can accurately predict the IPF of seasonal ice slurry storage.Measures such as adding ice point inhibitors during ice slurry preparation,setting agitators in the ice storage tank,increasing the ice slurry flow rate at the entrance of the ice storage tank,and reducing the IPF at the entrance of the slurry are beneficial to the uniform accumula-tion of the ice-rich layer in the ice storage tank and improve the IPF in the ice storage tank.For short-term ice slurry storage,cylin-drical ice storage tanks are preferred,while for seasonal ice slurry storage,underground stepped ice storage tanks are preferred.The research results of this article are helpful for the implementation and application of large-scale seasonal ice slurry storage.
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