【摘要】 研究并建立了饱和蒸汽加热球形物料过程中冷凝水质量变化的通用模型,以苹果为验证材料,研究了样品初始含水率以及饱和蒸汽温度对冷凝水质量的影响.结果表明,预测值与实测值吻合度好(R2>0.97),冷凝水主要产生于加热初期的60 s内.采用390~430 K的饱和蒸汽加热初始含水率为15%~55%的苹果,其湿基含水率提高4.5%~8.5%,孔隙率下降2.6%~4.0%.更多还原

【Abstract】 To investigate model on depicting quantity changes of condensate water when heating spherical material with saturated steam,initial moisture content of apple and how condensate water quantity response to steam temperature were recorded. Results showed that values predicted by the proposed model were highly correlated with true values( R2> 0. 97). Condensate water mainly generated within the first 60 s when heating started. Moisture content of apple,with initial moisture content being 15%-55%,could be increased by 4.5%-8.5%. And porosity was decreased by 2.6%-4.0% when heated with saturated steam at 390-430 K.更多还原