超导板在食品速冻和解冻中的应用

Application of superconducting plate to food quick-freezing and unfreezing

利用超导板加速食品冷冻和解冻过程,既能提升冷冻和解冻速度也不会产生额外的能量消耗。采用冻结点为-1℃的试验负载M包,将其分别放置在超导板、轧花铝板上,以及无放置板的情况下在冰箱冷冻室内冷冻并在25℃的自然环境下解冻。结果表明:放置在超导板上的M包从25℃冷冻到-18℃用时为轧花铝板的84.91%,为无放置板的54.96%,穿越冰晶区用时为轧花铝板的42.86%,为无放置板的23.77%;从-18℃升温到25℃用时为轧花铝板的92.24%,为无放置板的61.07%,冰晶融解用时为轧花铝板的80.70%,无放置板的71.32%。

Using superconducting plate to accelerate the process of food freezing and unfreezing can improve the speed of freezing and unfreezing without producing additional energy consumption.Using the test load M package with freezing point of-1℃,the process of freezing in the refrigerator and unfreezing at natural environment of 25℃are analyzed by test,under the conditions of M package placing on superconducting plate,ginned aluminum plate and without placement plate.The results show that when the M package placing on superconducting plate is cooled from 25℃to-18℃,it only spends 84.91%of that placing on ginned aluminum plate,54.96%of that placing without placement plate.For crossing the crystallisation zone,it only spends 42.86%of that placing on ginned aluminum plate,and 23.77%of that placing without placement plate.When it is unfreezing from-18℃to 25℃,it only spends 92.24%of that placing on ginned aluminum plate,and 61.07%of that placing without placement plate.For the recrystallisation process,it only spends 80.70%of that placing on ginned aluminum plate,and 71.32%of that placing without placement plate.