The Role of Soya Oil Ester in Water-Based PCM for Low Temperature Cool Energy Storage

Figure 6

Cooling process of 12.5%, 15%, and 17.5% of soya oil ester solutions in tap water. (a) Ice nuclei. (b) Growth ice crystal. (c) Initial formation of solid ice layer. (d) Complete formation of solid ice layer. ((c)-(d)) Ice crystal growth during freezing process.