2019 Volume 36 Issue 4 Pages 235-
We propose adsorption ice slurry generator to utilize low-temperature waste heat. Ethanol solution is used as a refrigerant of the adsorption cycle, and ice slurry is produced in the evaporator of the cycle. The adsorption ice slurry generator will expand the use of low-temperature waste heat, because we can transport cooling heat to a long distance by transporting ice slurry. In this study, we investigated the adsorption properties of silica gel against ethanol solution. Based on the results, we estimate the theoretical efficiency of the adsorption cycle using ethanol solution as refrigerant. It was concluded that ethanol solution is suitable for the refrigerant of the cycle because the estimated COP and exergy efficiency of the cycle using ethanol solution is higher than that using water or ethanol. It was confirmed that the adsorption cycle using 10 mass% ethanol solution is suitable for ice slurry production, because exergy efficiency is almost same even when the evaporation temperature decreases to freezing temperature of 10 mass% ethanol solution.
