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The influence of air parameters in cold storage on food freezing.

[In Chinese. / En chinois.]

Author(s) : WANG G., ZOU P., LIU M., et al.

Type of article: Article

Summary

The inhomogeneous distribution of air parameters in cold storage leads to local differences of food freezing at different locations. A dynamic simulation on parameter changes during a complete freezing process in cold storage was presented based on the heat and mass balance between subsystems. CFD method was employed to calculate the distribution of freezing condition for foods distributed in storage room. Then all foods were separated into several groups and modeled based on the freezing condition. Results show that during the initial stage of freezing process, heat release of food is the main source of cooling load, which decreases as the freezing process goes on. The importance of other loads increases gradually. Because of the inhomogeneous distribution of air parameters in cold storage, the freezing process and freezing time varies from each other and shows a time difference as big as 11.5 hours between the fasted and slowest freezing processes. The fluctuation of air temperature in storage room has no effects on food freezing at earlier stage, which causes some fluctuations of food temperature at later stage of freezing process.

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Pages: 66-70

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