• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>6th International Conference on Bulk Materials Storage, Handling and Transportation, Sep 28-30, 1998, University of Wollongong NSW >An Idealised Model of Moisture Migration and Flowability Changes in Raw Sugar
【24h】

An Idealised Model of Moisture Migration and Flowability Changes in Raw Sugar

机译：生糖水分迁移和流动性变化的理想模型

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A study of the flowability of some raw sugars has been undertaken to quantify the effect of temperature change. Preconsolidated raw sugar samples in simple flow factor tester cells were exposed to atmospheres both above and below the interstitial relative humidity of the sugars as supplied. At lower humidities the sugars lost moisture and gained shear strength. A relatively higher humidities the sugars gained moisture but the shear strength did not change significantly. A relationship between sugar water content change and shear strength was then displayed at 5℃ and 20℃. A second investigation was then carried out on a composite raw sugar wherein the water content was monitored in various atmospheres of controlled humidity and temperature as a function of time. Simple mass transfer coefficients did not apply except for short time intervals but the water content of the sugar when weight change ceased was found as a function of the humidity of the air in equilibrium. A simple model of moisture migration was then propounded where two quantities of the raw sugar at different temperatures are connected and water vapour is allowed to transport from one sample to the other. It is proposed that this elementary model could be the basis of moisture migration and flowability prediction in a large mass of sugar for the transport of moisture can be quantified and in turn the shear strength or flowability.
机译：已经对一些原糖的流动性进行了研究，以量化温度变化的影响。将简单流量因子测试仪单元中的预合并的原糖样品暴露在所提供糖的间隙相对湿度以上和以下的气氛中。在较低的湿度下，糖失去了水分并获得了剪切强度。相对较高的湿度下，糖获得了水分，但剪切强度没有明显变化。然后在5℃和20℃下显示出糖水含量变化与剪切强度之间的关系。然后对复合原糖进行了第二次研究，其中在各种湿度和温度受时间控制的气氛中监测水分含量。除了短时间间隔外，简单的传质系数不适用，但发现重量变化停止时糖的水分含量是平衡空气湿度的函数。然后提出了一个简单的水分迁移模型，将两个不同温度的原糖连接起来，然后允许水蒸气从一个样品传输到另一个样品。提出该基本模型可以作为水分迁移的基础，并且可以定量预测大量糖中的水分流动性，从而可以定量水分的运输，进而可以预测剪切强度或流动性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号