机械冷板冷藏车冷板融冰过程数值计算

Numerical Simulation of the Hold-over Plate During Melting Period in Mechanical Hold-over Refrigerated Vehicles

用焓法模型建立了冷板融冰过程的数学模型,采用控制容积法对方程进行离散化,并用三对角矩阵算法求解出各节点的焓值和温度,分析了冷板厚度和车内空气温度对冷板融冰过程的影响;结果表明,冷板中心融解缓慢,冷板厚度对融冰过程影响比车内空气的影响大,减少冷板厚度将大大减少融冰时间。

The mathematical model of hold-over plate during melting period was developed by using enthalpy method. The equation was discreted by using control volume method. The enthalpy and temperature of every node was calculated by using tridiagonal-matrix algorithm （TDMA）. The effect of thickness of hold-over plate and temperature of indoor air towards the melting period of hold-over plate was analyzed. The results show that the ice of central holdover plate melts slowly, the effect of thickness of hold-over plate is more than the effect of temperature of indoor air, and the discharging time will be reduced seriously by shortening the thickness of hold-over plate.