低温室内で平板に落下する液滴の凍結濃縮

実験パラメータが凍結濃縮現象に及ぼす影響

抄録

Experimental studies for freeze-concentration of liquid droplet fallen on a horizontal plate located in a cold room have been performed. The ice formed in this method is so called an ice stalagmite. Ethylene glycol aqueous solutions of 5wt% and 10wt% have been frozen to examine the effect of experimental parameters such as droplet temperature and droplet flow rate on concentration phenomena. It is found that the droplet temperature and the droplet flow rate affect ice formation pattern, but they do not affect the degree of concentration of the concentrated liquid. It suggests that the degree of concentration is affected only by cold room temperature. It is also shown that the degree of concentration becomes higher for longer freezing time.