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首页> 外文期刊>Fruits >Precooling parameters of Roxo de Valinhos figs (Ficus carica L.) packed in a carton box.
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Precooling parameters of Roxo de Valinhos figs (Ficus carica L.) packed in a carton box.

机译：包装在纸箱中的无花果Roxo de Valinhos Figs（Ficus carica L.）的预冷参数。

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Fruits of fig cv. Roxo de Valinhos are currently cooled in a cold room at a temperature between 1 and 3 degrees C, and it is unknown how long it takes to cool the fruits to that temperature. Parameters of forced-air precooling of Roxo de Valinhos packed in a carton box used for exportation and commercialization in Sao Paulo State, Brazil, were studied. Fruits were harvested at the harvest rami stage (3/4 of maturity) and transferred to boxes at 8 fruits per box, making up a total of 24 fruits per package. Forty-eight packages were utilized, 24 on each side to form a Californian tunnel. The air flow was 2.8 litre s-1 per kg of product, with an average air velocity of 2.0 m s-1. The initial interior temperature of the fruits was 20 degrees C and the final temperature was 1 degrees C. The evolution of the fig interior temperature was investigated. The cooling curve was drawn and the exponential analytical model to predict the precooling parameters was made based on experimental data. The cooling curve of fig showed a typical behaviour; the average fruit temperature during precooling presented a rapid fall at the beginning of the cooling period, and slowly declined when it was close to the final temperature. The cooling time was 110 minutes, whereas the cooling coefficient was 0.0344 min-1. The Biot number was 1.3, and the convective heat transference coefficient reached 23.8 degrees C W-1 m-2..
机译：无花果简历的果实。 Roxo de Valinhos当前在1至3摄氏度之间的冷藏室中冷却，将水果冷却至该温度需要多长时间是未知的。研究了装在巴西圣保罗州用于出口和商业化的纸箱中的Roxo de Valinhos的强制风冷参数。在收割期（成熟期3/4）收获水果，并以每盒8个水果的价格转移到盒子中，每个包装总共有24个水果。使用了48个封装，每侧24个，形成了加利福尼亚隧道。空气流量为每公斤产品2.8升s-1，平均风速为2.0 m s-1。水果的初始内部温度为20摄氏度，最终温度为1摄氏度。研究了无花果内部温度的演变。绘制了冷却曲线，并根据实验数据建立了预测预冷参数的指数分析模型。无花果的冷却曲线显示出典型的行为。预冷过程中的平均果实温度在冷却期开始时迅速下降，而在接近最终温度时缓慢下降。冷却时间为110分钟，而冷却系数为0.0344min-1。比奥数为1.3，对流传热系数达到23.8℃C W-1 m-2。

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