Abstract: Ice slurries have good thermal conductivity and fluidity, and hence are widely used in ice storage. In this work, a gas direct contact device was designed for rapid ice slurry preparation by using pre-cooling jacket, external vacuum insulation layer and multi-nozzle filling gas, and studied for the effects of these devices on the ice slurry production rate. The effects of the addition of molecular sieves, steel beads and glass beads as perturbation particles were then studied on the ice blockage. Finally, the effects of types and concentrations of additives on the quality of the ice slurry were discussed. By comparing the effect of each of the solutions, a method for improving the production efficiency of ice was put forward. It was showed that the use of alcohols as the additive was better than the use of salts, and, of all the alcohols studied, the use of 15% of glycerol gave the best performance.

Key words: ice slurry, ice storage, rapid preparation, gas direct contact