THE FFECT OF DIFFERENT HEATING PATTERNS ON VACUUM FREEZE DRYING OF LITCHI PULP

摘要：

Three heating patterns, constant temperature, temperature programmed and programmed cooling process were applied to freeze dry (FD) the litchi pulp in order to obtain the optimal FD heating method.The results show that the three patterns all could be used to freeze dry litchi pulp while the appearance was maintained well.The drying time of FD litchi pulp using programmed cooling process was the shortest among the three optimal heating patterns.The drying time was reduced by 15.8％ and 11.6％ comparing that of FD using constant temperature and temperature programmed.Higher temperature can be applied at the first primary drying stage and at secondary drying stage but should not be used at the later primary drying stage.

关键词： Freeze-Drying Heating patterns Litchi (Litchi chinensis sonn.)

作者: FANG Changfa QIAO Fang HUANG Luelue GU Yaping ZHANG Xiangyang ZHANG Shufei

作者单位: shenzhen polytechnic,Liuxian Road,Nanshan,Shenzhen,518055,China ShenZhen Inspection Station of Non-Pollution Agricultural ProductsFutian,Shenzhen,518040,China

会议类型: 国际会议

会议名称: The 7th Asia-Pacific Drying Conference(第七届亚太地区干燥会议 ADC2011)

会议地点: 天津

会议语种:英文

页码: 1-6

在线出版日期: 2011-09-18（万方平台首次上网日期，不代表论文的发表时间）