【作者】 谢珊； 吴江涛；

【Author】 Xie Shan Wu Jiangtao (School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an 710049,Shaanxi)

【机构】 西安交通大学能源与动力工程学院；

【摘要】 模拟食品冷藏过程对于优化食品加工工艺参数、促进冷冻食品工业的发展具有重要意义。冷冻过程的模拟需要提供样品的导热系数、比热容和密度等物理性质参数。本文利用探针法对25℃下无籽西瓜的导热系数进行了测定,误差小于5%;使用hot disk对西瓜比热进行测定,仪器误差3%以内。利用实验所得数据模拟298.15K西瓜在277.15K空气温度下的冷却过程,得出西瓜内部各观测点的降温曲线。更多还原

【Abstract】 Simulation of the food frozen processing is very important for the optimizing the process parameters and promoting the development of frozen food industry.Thermal physical properties,such as conductivity,heat capacity and density,were needed for the frozen processing simulation.Thermal conductivity probe was used to measure the thermal conductivity of the seedless watermelon at 25℃with a deviation less than 5%.Hot disk was used to measure the heat capacity of watermelon with a deviation less than 3%.The cooling process of watermelon at 298.15K under the ambient temperature at 277.15K was simulated,and the cooling curve was obtained for various inner points.更多还原