| 摘要: |
| 为探究植物工厂内风速及温度分布规律，利用计算流体力学软件（Computational fluid dynamics，CFD）建立人工光植物工厂三维模型，将整个植物工厂作为计算域划分网格并进行模拟计算。设计了侧进侧出式、侧进侧上出式、侧进上出式3种气流循环模式，并将试验植物工厂设置为上进侧出式。模拟结果表明：风速与温度的平均绝对误差、平均百分误差及均方根误差分别为0.12 m/s、1.1℃；11%、4%；0.18 m/s、1.3℃，与实际测量结果相比模拟准确。3种优化模式的风速值、温度值及二者均匀性均优于上进侧出式。分析比较植物冠层平面风速及温度值，得出侧进侧出式为最佳气流循环模式。与上进侧出式相比，侧进侧出式平均风速增加0.51 m/s，均匀性指标变异系数降低17%，平均温度降低0.5℃。 |
| 关键词: 计算流体动力学(CFD) 植物工厂 风速 温度 均匀性 |
| DOI：10.11841/j.issn.1007-4333.2018.05.013 |
| 投稿时间：2017-07-14 |
| 基金项目:科技部"863"计划课题（2013AA103004） |
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| Simulation and optimization of the air flow and temperature in plant factory with artificial light based on CFD |
|
LIU Huan, FANG Hui, CHENG Ruifeng, YANG Qichang
|
| (Institute of Environment and Sustainable Development in Agriculture/Key Laboratory of Energy Conservation and Waste Management of Agriculture Structures of Ministry of Agriculture, Chinese Academy of Agriculture Sciences, Beijing 100081, China) |
| Abstract: |
| 3D model of air ventilation and circulation system was designed to improve the velocity and temperature value and their uniformity in plant factory.CFD (Computational fluid dynamics) was applied to create a three-dimensional model and the whole plant factory was divided into grids and simulated.CFD model was validated through experimental data comparison of the distribution of air flow and temperature.The maximum absolute error,average relative error and root mean square error of wind speed and temperature were 0.12 m/s,1.1℃;11%,4%;0.18 m/s,1.3℃,respectively,which showed that simulation was accurate.Three cases were studied and compared in this study.The results showed that improve the velocity and temperature value and their uniformity were improved in all three optimized models compared with control.By comparing wind speed and temperature value of plant canopy surface,the average wind speed increased by 0.51 m/s,the coefficient of variation (CV) reduced by 17% and the average temperature reduced by 0.5℃,was the best air circulation system.This study provided theoretical basis for the design of air circulation system in plant factory. |
| Key words: computational fluid dynamics plant factory velocity temperature uniformity |
