Dynamic crystallization characteristics of the working process of small type ice slurry maker

doi:10.12028/j.issn.2095-4239.2018.0155

Abstract

Abstract: Dynamic ice storage is a latent heat storage technology in the field of energy storage. A small type experimental device for dynamic preparation of ice slurry was designed and built based on the flat scraping method. The effects of crystallization time, coolant temperature, type and concentration of additives, and scraping speed on the dynamic crystallization characteristics of the ice slurry were analyzed by testing the dynamic crystallization cooling curve of the ice making solution, and the ice content with crystal equivalent diameter at different crystallization moments.The results show that the scraping speed is lower than 200 r/min, and the degree of crystallization supercooling of the solution increases with the increase of the scraping speed. The ice content of the ice slurry and the ice crystal grain size increase with the crystallization time. When the ice crystal size is large, the scraping action causes the ice crystal particles to coalesce and break, which causes the degree of ice crystal size increase to slow down or even reduce.With the increase of additive concentration, the increase rate of ice content in ice slurry and the increase of ice crystal size were both decreased, and the effect of strong polar inorganic compounds on ice crystal growth was stronger than that of glycol and other alcohol compounds.

Key words: ice slurry, dynamic crystallization, ice content, ice crystal, equivalent diameter, microscopic test

CLC Number:

TK02

LIU Ruijian, LIANG Kunfeng, JIA Xueying, WANG Lin. Dynamic crystallization characteristics of the working process of small type ice slurry maker[J]. Energy Storage Science and Technology, 2019, 8(1): 138-145.

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