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水果蔬菜的气调贮藏是一种极有开发价值的保鲜方法。建立反映气调库贮藏环境内传热传质过程的具有普遍意义的数学模型,对于用计算机来研究和优化设计贮藏系统是极有意义的。本文采用K-ε紊流模型建立了水果气调库内气体流动、传热与传质的三维数学模型,还水果的呼吸原理建立了货物区的热质传递控制方程,采用SIMPLE算法和整体求解法,编制了通用的计算程序,对气调库的降温、降氧过程进行了数值计算。同时,我们还对相应的过程进行了实验研究,测试结果与利用本文所编制的计算程序的计算结果吻合较好,从而验证了数学模型的正确性和计算程序的可靠性。
Atmospheric storage of fruits and vegetables is a great preservation value preservation method. The establishment of a mathematical model that reflects the process of heat and mass transfer in the storage environment of a gas-liquid depot is of great significance for the computer to study and optimize the design of a storage system. In this paper, a three-dimensional mathematical model of gas flow, heat transfer and mass transfer in fruit-gas storage was established by K-ε turbulence model. The heat and mass transfer governing equations of the cargo area were also established by the principle of respiration of fruits. SIMPLE algorithm and global solution Method, a general calculation program has been compiled, and the numerical calculation of cooling and reducing oxygen process of the air-conditioned warehouse has been carried out. At the same time, we also carry out experimental research on the corresponding process. The test results are in good agreement with the calculation results of the computer program compiled in this paper, which verifies the correctness of the mathematical model and the reliability of the calculation program.