抄録
In this study, a new method of ice slurry formation was proposed, and the related phenomena were investigated. In the method, ethanol solution, as thermal storage material, evaporates on a low-pressure condition, and the remained solution is cooled and frozen due to the latent heat of evaporation. It is necessary to clarify a behavior of ethanol solution during ice production, and estimate the COP of this method for practical use. Thus, the relationship between concentration of ethanol solution and of the vapor, which is evaporated from it, was measured. Using this relationship, the COP was estimated. As the results, it was found that the difference in concentration between the solution and the vapor increases as the concentration of the solution increases. It was also found that the COP is affected by the concentration of the solution, the temperature in condenser and the type of freezing point depressant. Since the estimated COP is so high, it can be said that this method has advantage for producing ice.
