猕猴桃大帐气调气流组织的数值模拟及优化
TB61+1; 为确定合理的猕猴桃大帐气调参数,提高大帐气调贮藏性能,该研究通过模拟猕猴桃在果筐内的自然堆叠状态,建立了单个猕猴桃尺度的大帐气调微环境模型,采用数值模拟方法,分析猕猴桃大帐气调过程中N2纯度、流量、管径、出口高度4个关键参数对降氧时间及气体分布均匀性的影响.基于Box-Behnken原理设计四因素三水平正交仿真试验,利用Design-Expert软件建立响应指标回归模型,对所选取的4个因素进行响应面分析和参数优化.对优化参数组合进行仿真试验,对比优化参数组合条件下响应面回归模型预测值与仿真试验数值模拟值.结果表明:各因素对降氧时间影响由大到小顺序为出气口高度、流量、N2纯度、管...
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| Published in | 农业工程学报 Vol. 40; no. 5; pp. 307 - 316 |
|---|---|
| Main Authors | , , , , , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
华中农业大学工学院,农业农村部长江中下游农业装备重点实验室,武汉 430070%华中农业大学园艺林学学院,武汉 430070%微呼吸(武汉)农业科技有限公司,武汉 430070
01.03.2024
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1002-6819 |
| DOI | 10.11975/j.issn.1002-6819.202308210 |
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| Abstract | TB61+1; 为确定合理的猕猴桃大帐气调参数,提高大帐气调贮藏性能,该研究通过模拟猕猴桃在果筐内的自然堆叠状态,建立了单个猕猴桃尺度的大帐气调微环境模型,采用数值模拟方法,分析猕猴桃大帐气调过程中N2纯度、流量、管径、出口高度4个关键参数对降氧时间及气体分布均匀性的影响.基于Box-Behnken原理设计四因素三水平正交仿真试验,利用Design-Expert软件建立响应指标回归模型,对所选取的4个因素进行响应面分析和参数优化.对优化参数组合进行仿真试验,对比优化参数组合条件下响应面回归模型预测值与仿真试验数值模拟值.结果表明:各因素对降氧时间影响由大到小顺序为出气口高度、流量、N2纯度、管径;对不均匀系数影响由大到小顺序为N2纯度、出气口高度、管径、流量.猕猴桃大帐气调的最优气调参数组合为N2纯度96.0％、流量23.0m3/h、管径50 mm、出气口高度3 126 mm,对应的降氧时间、不均匀系数分别为989 s、6.1％.降氧时间响应面回归模型预测值与仿真值之间的相对误差为3.1％,不均匀系数响应面回归模型预测值与仿真值之间的相对误差为8.4％.研究对于大帐气调装备的研发及性能提升具有重要的理论和实际意义. |
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| AbstractList | TB61+1; 为确定合理的猕猴桃大帐气调参数,提高大帐气调贮藏性能,该研究通过模拟猕猴桃在果筐内的自然堆叠状态,建立了单个猕猴桃尺度的大帐气调微环境模型,采用数值模拟方法,分析猕猴桃大帐气调过程中N2纯度、流量、管径、出口高度4个关键参数对降氧时间及气体分布均匀性的影响.基于Box-Behnken原理设计四因素三水平正交仿真试验,利用Design-Expert软件建立响应指标回归模型,对所选取的4个因素进行响应面分析和参数优化.对优化参数组合进行仿真试验,对比优化参数组合条件下响应面回归模型预测值与仿真试验数值模拟值.结果表明:各因素对降氧时间影响由大到小顺序为出气口高度、流量、N2纯度、管径;对不均匀系数影响由大到小顺序为N2纯度、出气口高度、管径、流量.猕猴桃大帐气调的最优气调参数组合为N2纯度96.0％、流量23.0m3/h、管径50 mm、出气口高度3 126 mm,对应的降氧时间、不均匀系数分别为989 s、6.1％.降氧时间响应面回归模型预测值与仿真值之间的相对误差为3.1％,不均匀系数响应面回归模型预测值与仿真值之间的相对误差为8.4％.研究对于大帐气调装备的研发及性能提升具有重要的理论和实际意义. |
| Abstract_FL | Pallet bag storage is essentially the same as controlled atmosphere storage.The pallet bag is placed in cold storage,and then to control the composition and proportion of gases in it.Fruits and vegetables can be expected to store in small batches,due to the low cost,convenient management,and excellent storage.Among them,Kiwi fruit is well-suited for storage in pallet bags.However,the current storage conditions cannot be accurately and efficiently controlled for Kiwi fruits,because the simple facilities are confined to the manual operation of the storage environment in China.In this study,the optimal parameters were determined for the pallet bag storage,in order to enhance the storage performance and quality.The natural stacking state of the kiwifruit in the box was analyzed using SolidWorks Motion.The micro-environment model was established for a single kiwifruit in pallet bag storage.An air-conditioning storage test device of pallet bags was constructed to verify the accuracy of the micro-environment CFD simulation model.The verification test was then carried out.There was better consistency between the test and CFD simulation,indicating that the CFD model accurately simulated the O2 concentration in the pallet bag storage.After that,the single-factor experiment was carried out to analyze the influence of four key parameters(namely nitrogen purity,flow rate,pipe diameter,and outlet height)on the deoxygenation time and gas distribution in the regulating process of the storage environment.The results indicate that N2 purity,flow rate,and outlet height significantly affected the deoxygenation time and non-uniformity coefficient.However,there was no significant effect of pipe diameter on the deoxygenation time.Furthermore,a four-factor three-level orthogonal experiment was designed using Box-Behnken.Response surface analysis was conducted to establish a regression model for the four selected factors using Design-Expert software.The simulation experiment indicated that the influencing factors on deoxygenation time were ranked in descending order of outlet height,flow rate,N2 purity,and tube diameter.The influencing factors on the non-uniformity coefficient were ranked in descending order of the N2 purity,outlet height,pipe diameter,and flow rate.Taking the deoxygenation time and non-uniformity coefficient as the optimization objectives,the optimal operation parameters of pallet bag storage were obtained as follows:N2 purity 96.0％,flow rate 23.0 m3/h,pipe diameter 50 mm,and outlet height 3 126 mm.The optimal deoxygenation time and non-uniformity coefficient were 989 s and 6.1％,respectively.The CFD simulation was conducted using the optimal parameters.The predicted value of the response surface regression model was compared with that of CFD simulation.The relative error between the predicted and simulated values of oxygen reduction time,and non-uniformity coefficient were 3.1％,and 8.4％,respectively.The finding is of great theoretical and practical significance to promote the controlled atmosphere pallet bag of kiwifruit. |
| Author | 徐勤超 曾云流 张文东 朱家庭 陈昊义 潘海兵 李善军 单程 |
| AuthorAffiliation | 华中农业大学工学院,农业农村部长江中下游农业装备重点实验室,武汉 430070%华中农业大学园艺林学学院,武汉 430070%微呼吸(武汉)农业科技有限公司,武汉 430070 |
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| Author_FL | LI Shanjun ZHU Jiating PAN Haibing SHAN Cheng ZENG Yunliu XU Qinchao CHEN Haoyi ZHANG Wendong |
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| Keywords | 贮藏 controlled atmosphere effect 响应面法 response surface methodology storage 数值模拟 大帐气调 numerical simulation pallet bag storage 气调性能 |
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| Title | 猕猴桃大帐气调气流组织的数值模拟及优化 |
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