建立一个小型冷库模型,用CFD仿真技术模拟了冷库内部启动机组预冷和停机除霜两种工况下库内流场和温度场。研究表明,在保证预冷效果的同时,风速越大,预冷效果越好;吹热风除霜效果好,但库温回升快,应根据霜层厚度和除霜耗能寻找最优的除霜时间。 A small-scale cold storage model was established. The flow field and temperature field in the two kinds of working conditions of pre-cooling and defrost were simulated by CFD simulation technology. The results show that, while ensuring the precooling effect, the greater the wind speed, the better the precooling effect; the better the defrosting effect of blowing hot air, but the quick recovery of the reservoir temperature. The optimal defrosting should be found according to frost layer thickness and defrosting energy consumption time.