自然冷资源库中果蔬冷却过程的有限元分析

Finite Element Analysis on the Cooling Process of Fruits and Vegetables in Natural Cooling Resource Building

研究果蔬在自然冷资源库中的冷却过程对于冷库设计、冷藏工艺安排和分析果蔬冷藏时的品质变化都是至关重要的。该文采用有限元方法 ,分析了果蔬在自然冷资源库中的冷却过程及其影响因素 ,并给出考虑多种因素的果蔬冷却时间计算公式。研究表明 ,冷却时间与果蔬半径、冷却前初始温度、对流换热系数的倒数近似成线性关系 ,与冷却介质温度近似成二次曲线关系。

Analysis on the cooling process of fruits and vegetables is very important for the refrigerator designing, arrangement of its refrigerating technique and the analysis of its quality change during refrigerating. In this paper, the cooling process of fruits and vegetables in natural cooling resource building and its effective factor were analyzed by finite element method and the regressive formulas for predicting cooling time were put forward. The research results showed that the relationship between cooling time and radius of fruits and vegetables, beginning temperature and reversal coefficient of convective heat transfer is linear one, the relationship between cooling time and environmental temperature is parabolic one.