| 引用本文: | 高振军,郗 笑,李 浩,等.尖顶宽度对Venlo型温室微气候的影响[J].灌溉排水学报,2024,43(4):90-95. |
| GAO Zhenjun,XI Xiao,LI Hao,et al.尖顶宽度对Venlo型温室微气候的影响[J].灌溉排水学报,2024,43(4):90-95. |
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| 摘要: |
| 【目的】研究自然通风条件下尖顶宽度、风速对温室微气候的影响。【方法】以Venlo型连栋玻璃温室为研究对象，采用试验测量和CFD模拟相结合的方法，分析了自然通风条件下3种尖顶宽度温室（3.2 m,JD3.2；3.6 m,JD3.6；4 m,JD4）在不同室外工况下（风速0 m/s和1 m/s）气流和温度场变化特征。【结果】①对比模拟值与各测点实测值可知，温度相对误差为0.2%~3.3%，故数值计算模型可靠。②尖顶宽度显著影响温室内温度分布，JD3.2处理在高度方向呈自下而上升高的变化趋势，而JD3.6处理呈自上而下降低的变化趋势。③不同室外风速条件下，JD3.2处理除热效率最优；当室外风速为0 m/s时，JD3.6、JD4处理的除热效率和各水平层面平均温度均优于1 m/s室外风速JD3.6、JD4处理。【结论】从温室内的流场分布情况和除热效率来看，JD3.2处理整体通风降温效果最优。 |
| 关键词: Venlo型温室；尖顶宽度；自然通风；数值计算 |
| DOI：10.13522/j.cnki.ggps.2023421 |
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| The effect of spire width on microclimate within Venlo-type greenhouses |
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GAO Zhenjun, XI Xiao, LI Hao, LI Wei, DING Xiaoming, ZHANG Chenjun
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1. College of Mechanical and Power Engineering of China Three Gorges University, Yichang 443002, China;
2. Farmland Irrigation Research Institute, Chinese Academy of Agricultural Science, Xinxiang 453002, China;
3. Guangdong Institute of Modern Agricultural Equipment, Guangzhou 510520, China; 4. Key Laboratory of Structural Design and Intelligent Construction of Agricultural Facilities, Ministry of Agriculture and Rural Affairs, Beijing 100125, China;
5. School of Intelligent Manufacturing,Luoyang Institute of Science and Technology, Luoyang 471023, China
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| Abstract: |
| 【Objective】The Venlo-type greenhouse is commonly used in commercial horticulture due to its efficient space utilization and superior light transmission. This study investigates the impact of spire width on microclimate within such greenhouses under natural ventilation conditions.【Method】The study focused on multi-span glass greenhouses. We used experimental measurement and CFD modelling to simulate the variations in temperature and airflow in the greenhouse for various spire widths: 3.2 m JD3.2, 3.6 m JD3.6 and 4 m JD4 under natural ventilation conditions when the outdoor wind speed was 0 and 1 m/s, respectively.【Result】① Comparing with measured temperature at different sampling points in the greenhouse reveals that the relative error of the simulated temperature ranged from 0.2% to 3.3%, ② Spire width had a significant effect on temperature distribution in the greenhouse. In particular, temperature increased upward in the greenhouses with the JD3.2 spire, while, in contrast, temperature increased downward in the greenhouses with the JD3.6 spire. ③ Regardless of the outdoor wind speed, greenhouses with JD3.2 spire had the best heat removal efficiency. The heat removal efficiency of JD3.6 and JD4 spire and the associated temperature distribution in the greenhouses was better when the outdoor speed was 0 m/s than when the outdoor wind speed was 1 m/s. 【Conclusion】For all spire widths we compared under different working conditions, the greenhouse with JD3.2 spire work best for ventilating and cooling the greenhouse. |
| Key words: venlo type greenhouse; spire width; natural ventilation; numeral calculations |
