摘要
根据家用制冰机的工作原理和结构利用焓法对其制冰过程建立数学物理模型,采用全隐式格式开展有限差分数值模拟研究。在一台家用制冰样机上进行实验测试,通过改变环境温度观测冰层厚度与制冰时间的关系,并将实验结果与数值解进行对比。结果表明,数值解与实测值之间相对误差的绝对值小于3%,升高环境温度,在同样的时间内成品冰厚度减小,质量下降。
Based on operating principle and structure of household ice machine, the mathematic physical model of freezing process is developed according to enthalpy method . Implicit format of finite difference method is utilized and numerical simulation is analyzed. Some experiments are tested on an ice machine specimen. The relationship between ice thickness and freezing time is obtained by means of ambient temperature alternation, and measured values are contrasted with numerical results.Conclusions indicate that absolute relative error between numerical and experimental results is less than 3%, and in the same operating time, ice thidkness and quality descend accompany with ambient temperature rising.
出处
《制冷》
2007年第1期10-13,共4页
Refrigeration
关键词
制冰机
焓法
有限差分
数值模拟
Ice machine, Enthalpy method, Finite difference method, Numerical simulation
