摘要
为提高微型植物工厂CO_2气肥增施性能,以CO_2气肥增施为研究对象,保持培养箱适宜光照强度不变,采用计算流体力学(CFD)技术,选用多孔介质模型、组分传输模型,针对气肥增施量和增施高度等因素对CO_2增施性能进行三维数值模拟。结果表明,气肥增施过程对生长区的温度场影响较大,合理布置风机和气肥增施口可以有效避免CO_2的沉积效应,气肥增施最适位置为侧壁距培养箱底面高0. 5 m处,最佳喷施时间为26 s,此时内部CO_2质量分数均匀,且生长区CO_2质量分数平均值为0. 125%。CO_2质量分数模拟值与实测值偏差保持在8. 4%以下,模拟结果与试验结果较吻合,验证了模型的准确性。间歇增施CO_2试验组和持续增施CO_2对照组马拉巴栗叶面积、株高均得到明显提高,且试验组高于对照组,增幅分别为10. 79%、7. 47%。
In order to improve the performance of CO2gas fertilizer in minitype plant factories,the application of CO2gas fertilizer was the research object,and the suitable light intensity of the incubator was kept constant.The computational fluid dynamics(CFD)technology was adopted,and the porous medium model and component transport model were selected.Three-dimensional numerical simulation of CO2application performance was carried out according to factors such as gas fertilizer application amount and application height.The results showed that the application process of gas fertilizer had a great influence on the temperature field of the growing area.The reasonable arrangement of fan and entrance of gas fertilizer could effectively avoid the deposition effect of CO2.The optimum position of gas fertilizer application was0.5m from the bottom of the incubator in the side wall.The optimum spraying time was26s,at this point the internal CO2concentration was uniform,and the CO2concentration in the growth zone was0.125%.The deviation between the simulated value and measured value of CO2concentration was kept below8.4%,and the simulation results were in good agreement with the experimental results,which verified the correctness of the model.The leaf area and plant height of Malabar were significantly increased in the test group with intermittent application of CO2and the control group with continual application of CO2,and the test group was10.79%and7.47%higher than the control group respectively.
作者
贾鹤鸣
张森
宋文龙
邢致恺
朱柏卓
彭晓旭
JIA Heming;ZHANG Sen;SONG Wenlong;XING Zhikai;ZHU Baizhuo;PENG Xiaoxu(College of Mechanical and Electrical Engineering,Northeast Forestry University,Harbin150040,China)
出处
《河南农业科学》
CSCD
北大核心
2018年第12期143-150,共8页
Journal of Henan Agricultural Sciences
基金
国家自然科学基金项目(31470714)
关键词
微型植物工厂
CO2增施
组分传输模型
多孔介质模型
数值模拟
Minitype plant factory
Application of CO 2
Component transfer model
Porous media model
Numerical simulation
作者简介
贾鹤鸣(1983-),男,辽宁沈阳人,副教授,博士,主要从事基于植物生体信息的最适环境控制技术研究。E-mail:jiaheminglucky99@126.com;通讯作者:宋文龙(1973-),男,吉林四平人,教授,博士,主要从事植物信息检测技术研究。E-mail:wlsong139@126.com
