MODELING TEMPERATURE AND MOISTURE CONTENT CHANGES IN BUNKER-STORED RICE

Abstract

ABSTRACT A two-dimensional model that describes the temperature and moisture content changes for a bunker storage unit was developed. Various combinations of initial grain temperatures, initial grain moisture contents, and loading dates were used to determine any advantages or disadvantages of each. Temperature and moisture content contour plots, dry matter loss, and condensation data were analyzed. The effects of only the loading dates on dry matter loss appeared to be minimal for all combinations tested. Relatively high dry matter loss values were experienced at the extreme temperature/moisture content combination of 30 C and 15% (w.b.). The combined effect of high initial temperatures and moisture contents resulted in an appreciable amount of moisture migration to the peak of the bunker cross-section making this area more susceptible to spoilage and microbial activity.