Experimental Studies on the Heat Exchange Rules of Rice Cooling Process by Cool Water

摘要

In order to explore the heat transfer law during water cooling process, the influences of temperature of cooling water, flow of cooling water, rice temperature after milling and flow of rice on the final temperature of rice, and the effects of water cooling method on the head rice rate of polished rice were investigated on a self-design test-bed for the water-cooling rice. The head rice rate of rice after the polishing process was calculated with water and air cooling method respectively. SAS software was used to analyze the experimental data. The results showed that, the temperature of cooling water and cooling time had significant effects on the final temperature of rice;the head rice rate with water cooling was 4 to 9 percentage higher than that with air cooling method when the moisture content of the brown rice was 15～16%. The study and results can provide a theoretical basis for water cooling method of rice.