Experimental Study on Slurry Ice Formation in Right Circular Cylinder and Its Empirical Model
DOI:
https://doi.org/10.59796/jcst.V15N3.2025.122Keywords:
Slurry ice formation, Phase change material, Right circular container, Experimental modelAbstract
Slurry ice has the potential to serve as a secondary working fluid for cooling purposes or as a cold storage medium due to its high energy intensity. In the latter application, it can overcome the drawbacks associated with using regular ice, such as ice bridging and insulation, thereby enhancing heat transfer between the exchanger surface and the surrounding medium. However, the solidification process depends on various factors, including the concentration of the freezing point depressant, the freezing point of the working medium, the size and shape of the storage medium, and its thermal properties. This study investigated the formation of slurry ice using water-ethanol and water-propylene glycol mixtures with different concentrations of freezing point depressants. The experiments were conducted in a freezer at temperatures around -15 and -20oC. The findings revealed that higher concentrations of freezing point depressants resulted in a faster growth rate of ice, however when the concentration exceeded 8 wt%, the opposite effect was observed. To better understand the process phenomena, a set of new empirical models was developed using polynomial curve fitting of related parameters in dimensionless forms to predict the amount of slurry ice formed over time. The results from the models showed good agreement with the experimental data across different concentrations of freezing point depressants and container sizes.
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