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茶叶科学 ›› 2004, Vol. 24 ›› Issue (4): 270-275.doi: 10.13305/j.cnki.jts.2004.04.009

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鲜叶微波杀青过程中的热效率分析

叶阳, 袁海波, 尹军峰, 林智   

  1. 中国农业科学院茶叶研究所,农业部茶叶化学工程重点实验室,浙江 杭州,310008
  • 出版日期:2004-12-25 发布日期:2019-09-16
  • 作者简介:叶阳(1962— ),男,四川荣县人,副研究员,主要从事茶叶加工研究与茶叶科技成果推广工作。
  • 基金资助:
    浙江省科技厅省级重大农业科技攻关项目(2003 C1 2004)

Analysis of Thermal Efficiency during the Processing of Microwave De-enzyming of the Fresh Tea Leaves

YE Yang, YUAN Hai-bo, YIN Jun-feng, LIN Zhi   

  1. Key Lab of Tea Chemical Engineering, Ministry of Agriculture; Tea Research Institute, Chinese Academy of Agricultural sciences, Hangzhou 310008, China
  • Online:2004-12-25 Published:2019-09-16

摘要: 目前利用“混合法”测定茶叶的比热未见报道,经测定茶鲜叶的含水量在50%~72%时的比热平均值为3.44βKJ/kg·℃。试验结果表明微波杀青的热效率主要受投叶量的影响,而鲜叶厚度和处理方式的影响还需要做进一步的研究;另外,实验得到微波杀青的热效率可达32.32%~38.62%,远高于现有微波杀青机的热效率(21.23%和18.11%),为微波杀青机的设计改进提供了相关的理论依据。

关键词: 微波, 杀青, 热效率

Abstract: It has not been reported the specific heat of fresh tea leaves that measured by the method of “mixing”. When the leaves contain 50% to 72% of the moisure the average heat ratio of the leaves is 3.44KJ/kg·℃. The results of the experiemnts showed that the main factor that affect the efficiency of heat is the quantity of the leaves during microwave de-enzyming. While the efficiency related with the thickness of the layer of tea leaves and methods for treatment need to be further study. The thermal efficiency of microwave de-enzyming is 32.32% to 38.62%, higher than that of machinery microwave processing, which is 21.23% and 18.11%. The experimental data may be useful to improvement of the efficiency of machinery microwave processing which is used in tea processing factory.

Key words: Microwave, De-enzyme, Thermal efficiency

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