抄録
An experimental study was performed for freeze-concentration of 1 % water-solution of sodium chloride in a cylindrical container, where a heat transfer pipe was set vertically. Experimental results denoted that temperature gradient in the ice promote solute rejection. When the ice is given a temperature gradient for long time , solute is eliminated little by little from the ice . By varying the temperature of the inner wall, the difference of concentration rate, distribution coefficient and concentration of ice was measured.
