| 保鲜运输用液氮充注气调控制系统的设计与试验 |
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| 引用本文： | 王广海,吕恩利,陆华忠,韩小腾,张明帮.保鲜运输用液氮充注气调控制系统的设计与试验[J].农业工程学报,2012,28(1):255-259. |
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| 作者姓名： | 王广海 吕恩利 陆华忠 韩小腾 张明帮 |
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| 作者单位： | 1. 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;广东机电职业技术学院汽车学院,广州510515
2. 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： | 现代农业产业技术体系建设专项资金（CARS-33-13）、国家自然科学基金项目（31101363）、广东省自然科学基金资助项目（10151064201000038）、广州市农业科技项目（2011）、广东省科技计划项目（2011B020312003）。 |
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| 摘 要： | 为实现对气调保鲜运输厢体内气体成分的自动控制,以液氮充注气调为对象,搭建了液氮充注气调试验平台。设计了基于低温保护优先的气调方案,采用双限值的控制方法,实现了液氮充注气调的自动控制。以香蕉为试验物料,开展液氮充注气调保鲜试验。结果表明:运输厢体气密性对氧气体积分数变化影响较大,气密性差则增加了系统执行机构的工作频率及液氮消耗量;塑料筐和纸皮箱2种香蕉包装条件对液氮充注降氧影响不大;初始温度对液氮充注的降氧时间影响较大,初始温度高时降氧时间短,初始温度低时降氧时间长;系统实现了以温度优先的气调控制策略,系统工作稳定性良好。上述研究为开发液氮充注气调保鲜运输车提供了参考。
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| 关 键 词： | 运输 液氮 控制系统 气调 香蕉 |
| 收稿时间： | 2011/6/29 0:00:00 |
| 修稿时间： | 2011/12/2 0:00:00 |
Design and experiment of controlled atmosphere system based on liquid nitrogen injection for fresh-keeping transportation |
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| Wang Guanghai
,
Lü Enli
,
Lu Huazhong
,
Han Xiaoteng
,
Zhang Mingbang.Design and experiment of controlled atmosphere system based on liquid nitrogen injection for fresh-keeping transportation[J].Transactions of the Chinese Society of Agricultural Engineering,2012,28(1):255-259. |
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| Authors: | Wang Guanghai Lü Enli Lu Huazhong Han Xiaoteng Zhang Mingbang |
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| Institution: | 1,3(1.Key Laboratory of Key Technology on Agricultural Machine and Equipment,Ministry of Education,South China Agricultural University,Guangzhou 510642,China;2.College of Automotive,Guangdong Jidian Polytechnic,Guangzhou 510515,China;3.College of Engineering,South China Agricultural University,Guangzhou 510642,China) |
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| Abstract: | A test platform of controlled atmosphere system based on liquid nitrogen injection was established, so as to control the oxygen and carbon dioxide level automatically in the container. A control scheme prior controlling the temperature was designed with double limited values. Bananas were used as experiment materials for controlled atmosphere system based on liquid nitrogen injection. The results indicated that the change of oxygen level was affected significantly by container tightness. Low container tightness would increase the operation frequency of the actuator and waste liquid nitrogen. The decreased rate of oxygen level was found not distinctly affected by different packages of bananas, whether plastic crate or carton, but mainly affected by different initial temperature. High initial temperature ensured constant liquid nitrogen injection and reduced consumed time, while low intial temperature caused intermittent nitrogen injection and required extra time. This temperature prior strategy was proved stable and could serve as reference for further development of fresh-keeping transportation equipment. |
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| Keywords: | transportation liquid nitrogen controlled systems controlled atmosphere banana |
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