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Thin‐Layer Models for Intermittent Drying of Rough Rice
Author(s) -
Shei HungJung,
Chen Yiluen
Publication year - 1999
Publication title -
cereal chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.558
H-Index - 100
eISSN - 1943-3638
pISSN - 0009-0352
DOI - 10.1094/cchem.1999.76.4.577
Subject(s) - tempering , relative humidity , thin layer , chemistry , humidity , interval (graph theory) , moisture , range (aeronautics) , layer (electronics) , composite material , meteorology , materials science , mathematics , geography , organic chemistry , combinatorics
Thin‐layer drying data was collected for rough rice from 108 treatments. Four thin‐layer equations were derived by regression analysis to predict the drying behavior for deep‐bed drying of rough rice. The proposed equations consider the effects of drying air temperature, drying air absolute humidity, drying time interval, and tempering time interval. Drying air temperature range was 35–65°C, drying air absolute humidity range was 10–26 g/kg of dry air, drying time interval was 5–15 min, and tempering time interval was 40–120 min. In addition, the variations of moisture content with tempering time intervals and drying time intervals were considered. Within the tempering time interval range of 40–120 min and drying time interval of 5–15 min, a shorter drying time interval and a longer tempering time interval are preferable in a recirculating type rice dryer.