Abstract
An experimental study was performed for freeze-concentration of 1% or 10% water-solution of sodium chloride in a cylindrical container, where a heat transfer pipe was set vertically. Experimental results denoted that concentration in case of non-insulation is better than the case of insulation for outside of a container. In case of keeping the temperature at inner wall constant, distribution factor shown better results as preset temperature is raised. In terms of a relation of freezing speed and coefficient of distribution, high temperature at inner wall prevent ice surface from figuration of mushy region. Though measurement of density distribution, it was suggested that natural convection enhances the concentration.
