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采后果實表面對流換熱系數(shù)測定
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國家自然科學(xué)基金資助項目(30771245)、上海市科委農(nóng)業(yè)重點資助項目(10391900404)和上海市教委重點學(xué)科建設(shè)資助項目(J50704)


Determination of Heat Transfer Coefficients of Postharvest Fruit
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    摘要:

    以蘋果、黃瓜為實驗對象,通過對采后果實熱空氣處理中表面對流換熱系數(shù)的實驗測定,得到換熱實驗關(guān)聯(lián)式。結(jié)果表明:在相同的熱空氣溫度下,果實表面對流換熱系數(shù)隨空氣流速的增大而增大;隨果實徑向尺寸的增大而減??;采后果實作為生物體,由于自身的蒸騰作用,傳熱過程中出現(xiàn)了流體的相變,進(jìn)而導(dǎo)致?lián)Q熱效果顯著增強。

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    A test was applied to determine the heat transfer coefficients of apple and cucumber to obtain the experimental correlation of heat transfer. The results showed that the heat transfer coefficients of fruit increased with the increasing of air velocity, decreased with the increasing of radial dimension of fruit under the same condition of the hot air temperature. The heat exchange efficiency between fruits and hot air was enhanced significantly for the biological transpiration. Phase transition occurred in the process of heat transfer.

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張敏,盧佳華,楊樂,陳健華,車貞花,謝晶.采后果實表面對流換熱系數(shù)測定[J].農(nóng)業(yè)機械學(xué)報,2011,42(10):150-153,149. Zhang Min, Lu Jiahua, Yang Le, Chen Jianhua, Che Zhenhua, Xie Jing. Determination of Heat Transfer Coefficients of Postharvest Fruit[J]. Transactions of the Chinese Society for Agricultural Machinery,2011,42(10):150-153,149.

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