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| 干切牛肉冷冻干燥中解析干燥过程的动态模拟及优化 | |
| 引用本文： | 罗瑞明,董 平,李亚蕾,周光宏.干切牛肉冷冻干燥中解析干燥过程的动态模拟及优化[J].农业工程学报,2009,25(7):271-276. |
| 作者姓名： | 罗瑞明 董 平 李亚蕾 周光宏 |
| 作者单位： | 1. 宁夏大学农学院,银川,750021;南京农业大学食品科技学院,南京,210095 2. 宁夏工商职业技术学院,银川,750001 3. 宁夏大学农学院,银川,750021 4. 南京农业大学食品科技学院,南京,210095 |
| 基金项目： | 国家支撑计划（2006 BAD05A15） |
| 摘 要： | 该文通过对干切牛肉冷冻干燥中解析阶段含水率、物料温度的动态模拟及干燥速率与耗能分析，确立干切牛肉冷冻干燥中解析干燥的优化操作条件。通过建立解析阶段中脱除水分所需干燥时间以及相应的物料表面温度、物料中心温度的数学模型，并假设解析干燥过程中物料含水率由升华结束时的10.0%下降到干燥结束的0，以含水率变化为自变量，模拟了物料厚度为6、8、12、15 mm的干切牛肉在干燥室压强10 Pa，加热板温度80℃的操作条件下含水率、物料温度随时间的动态变化。以所建模型预测厚度7、9、10、11、12、13、14 mm的干切牛肉在该操作条件下含水率、物料温度的动态值及解析干燥周期。验证试验表明：预测与实测含水率相对误差小于10%，物料中心温度计算值与实测值的绝对误差小于5℃，说明所建模型可用于模拟、预测6～15 mm干切牛肉冷冻干燥中解析干燥阶段的参数变化。比较不同厚度干切牛肉冷冻干燥中解析干燥阶段的干燥比耗时、干燥效率，结果是采用6 mm厚度切片进行干燥，生产单位产品耗能最低，且生产率最大。 |
| 关 键 词： | 冷冻干燥，解析干燥，优化，干切牛肉，动态模拟 |
| 收稿时间： | 2/3/2009 12:00:00 AM |
| 修稿时间： | 2009/7/14 0:00:00 |
Dynamic simulation and optimization for desorption drying process during freeze drying of cooked beef slice |
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| Luo Ruiming,Dong Ping,Li Yalei and Zhou Guanghong.Dynamic simulation and optimization for desorption drying process during freeze drying of cooked beef slice[J].Transactions of the Chinese Society of Agricultural Engineering,2009,25(7):271-276. | |
| Authors: | Luo Ruiming Dong Ping Li Yalei and Zhou Guanghong |
| Institution: | 1.School of Agriculture;Ningxia University;Yinchuan 750021;China;2.College of Food Science and Technology;Nanjing Agricultural University;Nanjing 210095;3.Ningxia College of Industry and Business;Yinchuan 750001;China |
| Abstract: | The dynamic change of moisture ratio and sample temperature during desorption drying in freeze drying of cooked beef slice were simulated,and the optimal operation conditions were determined through the analysis of the drying rate and energy consumption.Mathematical models were established for desorption time,sample center temperature and sample surface temperature while the moisture of sample was dehydrated during the desorption drying.Moisture ratio was taken as independent variable.On the assumption that... |
| Keywords: | freeze drying desorption drying optimization beef slice dynamic simulation |
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