Establishment of Dehydration Model of Honey under Vacuum

Honey is more viscous than other sugar solutions.Its dehydration is difficult,and dehydration process is different from other sugar solutions.The aim of this study was to determine the variation of honey moisture content and dehydration rate and honey moisture content rate by microwave heating dehydration under vacuum and determination of the variation of honey mass online,analyse the dehydration process of honey,and establish the dehydration model of honey by fitting regression analysis.The honey dehydration rate reduces with the decrease of honey moisture content at the same temperature and under the same vacuum degree.The varying process of honey dehydration rate consists of dehydration rate in creasing with temerature rising,dehydration rate being constant,dehydration rate fast decreasing and dehydration rate slowly decreasing stages.The equation between honey moisture content rate and dehydration time is MR= exp[(0.0002 exp(0.0122T)) t ] when dehydration temperature ranges from 313.15 K to 343.15 K,where MR stands for honey moisture content rate,and t stands for dehydration time,whose unit is minute.