| 番茄差压预冷过程中的通风阻力特性 |
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| 引用本文： | 吕恩利,陆华忠,杨 洲,刘灿成,郭嘉明.番茄差压预冷过程中的通风阻力特性[J].农业工程学报,2010,26(7):341-345. |
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| 作者姓名： | 吕恩利 陆华忠 杨 洲 刘灿成 郭嘉明 |
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| 作者单位： | 华南农业大学南方农业机械与装备关键技术省部共建教育部重点实验室,广州,510642;华南农业大学工程学院,广州,510642 |
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| 基金项目： | 广东省科技计划项目（2008B021200008）；广东省人大议案项目（2009）；华南农业大学校长科学基金项目（2009K008） |
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| 摘 要： | 为解决番茄差压预冷包装箱开孔率的设计问题，建立了差压预冷试验装置。通过改变预冷风速、开孔率、包装箱长度等因素，研究各因素对包装箱两端压差和装置能耗的影响，分析番茄的通风阻力特性。结果表明：番茄的通风阻力特性可用Ramsin方程表述；包装箱两端的压差随风速的增大而增大；在风速相同的情况下，压差随包装箱两侧开孔率的增大而减小；包装箱两端的压力损失与包装箱长度呈线性关系；装置能耗与预冷风速呈线性关系；优化了不同长度番茄预冷包装箱的开孔率的取值范围。研究结果对番茄差压预冷包装箱的设计具有一定的参考价值。
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| 关 键 词： | 阻力，包装，农产品，差压预冷，开孔率，番茄 |
| 收稿时间： | 3/3/2010 12:00:00 AM |
| 修稿时间： | 7/5/2010 12:00:00 AM |
Pressure drop characteristics in forced-air pre-cooling of tomatoes |
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| Lü Enli,Lu Huazhong,Yang Zhou,Liu Cancheng,Guo Jiaming.Pressure drop characteristics in forced-air pre-cooling of tomatoes[J].Transactions of the Chinese Society of Agricultural Engineering,2010,26(7):341-345. |
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| Authors: | Lü Enli Lu Huazhong Yang Zhou Liu Cancheng Guo Jiaming |
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| Abstract: | A forced-air pre-cooling experimental device was established to study the ratio of open area for the tomato package. The pressure drop characteristics of tomatoes were studied. The effects of airflow velocity, ratio of open area and length of the package on the characteristics of pressure drop and energy consumption were analyzed. Some relationships were found out. The pressure drop characteristics could be described by the Ramsin equation. The pressure drop between front and rear of the package increased with the addition of airflow velocity. At the same airflow velocity, the pressure drop decreased with the addition of ratio of open area in two sides of the package. The length of pre-cooling package was linear with the critical ratio of open area, so was the relationship between airflow velocity and energy consumption. The ratio of open area based on different lengths of tomatoes pre-cooling package was optimized. The research has reference value for the optimization design of the tomato pre-cooling package. |
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| Keywords: | pressure drop packaging agricultural products forced-air pre-cooling ratio of open area tomatoes |
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