| 热敏电阻法测量胡萝卜及马铃薯的热物性 |
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| 引用本文： | 徐 林,王金鹏,邓 力,金征宇.热敏电阻法测量胡萝卜及马铃薯的热物性[J].农业工程学报,2008,24(11):237-241. |
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| 作者姓名： | 徐 林 王金鹏 邓 力 金征宇 |
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| 作者单位： | 江南大学食品科学与技术国家重点实验室,江南大学食品学院,无锡,214122 |
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| 基金项目： | 国家自然基金重点资助项目 |
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| 摘 要： | 热物性参数的测定对于农产品加工及储藏过程中的数学模拟计算非常重要。在分析微珠状热敏电阻传热模型的基础上,在室温对标准样品(乙二醇、乙醇、氯化钙的水溶液)的热物性进行测定,结果显示,导热系数及热扩散系数的测量值与推荐值之间无显著性差异(p>0.05);热敏电阻法与热探针法对比测定胡萝卜及马铃薯两种农产品的导热系数,结果显示两种方法之间无显著性差异(p>0.05);热敏电阻法与常规计算对比测定胡萝卜及马铃薯两种农产品的热扩散系数,结果显示两种方法之间无显著性差异(p>0.05)。热敏电阻法能够用于小直径农产品热物性的测量。
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| 关 键 词： | 导热系数 热扩散系数 热敏电阻 农产品 热物性 |
| 收稿时间： | 2007/11/23 0:00:00 |
| 修稿时间： | 2008/10/12 0:00:00 |
Thermistor for measuring thermophysical properties of carrot and potato |
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| Xu lin,Wang Jinpeng,Deng Li and Jin Zhengyu.Thermistor for measuring thermophysical properties of carrot and potato[J].Transactions of the Chinese Society of Agricultural Engineering,2008,24(11):237-241. |
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| Authors: | Xu lin Wang Jinpeng Deng Li and Jin Zhengyu |
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| Institution: | State Key Lab of Food Science and Technology,School of Food Science and Technology,Jiangnan University,Wuxi 214122,China,State Key Lab of Food Science and Technology,School of Food Science and Technology,Jiangnan University,Wuxi 214122,China,State Key Lab of Food Science and Technology,School of Food Science and Technology,Jiangnan University,Wuxi 214122,China and State Key Lab of Food Science and Technology,School of Food Science and Technology,Jiangnan University,Wuxi 214122,China |
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| Abstract: | Measurement of thermophysical parameters is very important for mathematical simulation calculation in the processing and storage of agricultural products.A method using a tiny thermistor as heat transfer model was developed to measure thermophysical properties(thermal conductivity and thermal diffusivity)of three standand samples(ethanol,ethylene alcohol,solution of calcium chloride).Results showed that there was no significant difference between measurement and recommendation;results of thermal conductivity from thermistor method and heat probe method for carrot and potato samples showed no significant difference;results of thermal diffusivity between thermistor method and calculation for carrot and potato samples showed no significant difference.Thermistor can be used to determine thermophysical property of agricultural products. |
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| Keywords: | thermal conductivity thermal diffusivity thermistor agricultural products thermophysical property |
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