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首页> 外文期刊>Transactions of the ASABE >OPTIMIZATION OF VENT CONFIGURATION BY EVALUATING GREENHOUSE AND PLANT CANOPY VENTILATION RATES UNDER WIND-INDUCED VENTILATION
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OPTIMIZATION OF VENT CONFIGURATION BY EVALUATING GREENHOUSE AND PLANT CANOPY VENTILATION RATES UNDER WIND-INDUCED VENTILATION

机译：通过评估风诱导通风下的温室和植物冠层通风速率来优化通风结构

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摘要

The effects of greenhouse vent configurations, plant existence, and external wind speeds on ventilation rates and airflow patterns in a greenhouse and plant canopy zone under wind-induced ventilation were investigated. The optimization of traditional vent configuration for a two-span glasshouse for better air renewal, especially in the plant canopy zone, was attempted by three-dimensional numerical simulations using a computational fluid dynamics (CFD) approach. The realizable k-ε model was used for a turbulent model, and the existence of the plants in the greenhouse was modeled by a porous medium method. Prior to the optimization, the CFD model was verified with the results of an experimental study of natural ventilation. The CFD model adequately matched those results. The ventilation rates, both in the greenhouse and in the plant canopy zone, were proportional to external wind speed. Maximum greenhouse ventilation rates were achieved when rollup type side vents were used in the side walls and both side and roof vents were fully open (case 3). For example, the ventilation rate for this vent configuration was 6.03 m{sup}3 m{sup}(-2) min{sup}(-1) at an external wind speed of 1.5 m s{sup}(-1). The greenhouse ventilation rate for this vent configuration was almost the same as when the butterfly-type side and roof vents were fully open (case 1). However, the use of a rollup side vent considerably improved the ventilation rate in the plant canopy zone. This showed that ventilation in the plant canopy zone was significantly affected by internal airflow patterns caused by different vent configurations.
机译：研究了温室通风口配置，植物的存在和外部风速对风诱导通风条件下温室和植物冠层区通风速率和气流模式的影响。通过使用计算流体动力学（CFD）方法的三维数值模拟，尝试对两跨度温室的传统通风孔配置进行优化，以实现更好的空气更新，尤其是在植物冠层区域。将可实现的k-ε模型用于湍流模型，并通过多孔介质方法对温室中植物的存在进行了建模。在优化之前，通过自然通风实验研究的结果验证了CFD模型。 CFD模型足以匹配这些结果。温室和植物冠层区的通风率均与外部风速成正比。当在侧壁上使用汇总式侧通风口并且侧通风口和屋顶通风口都完全打开时，可以达到最大的温室通风速率（案例3）。例如，在1.5 m s {sup}（-1）的外部风速下，此通风口配置的通风速率为6.03 m {sup} 3 m {sup}（-2）min {sup}（-1）。此通风口配置的温室通风率几乎与蝴蝶式侧通风口和屋顶通风口完全打开时相同（情况1）。但是，使用汇总式侧通风口可以显着提高植物冠层区域的通风速率。这表明植物冠层区域的通风受到不同通风口配置引起的内部气流模式的显着影响。

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