基于CFD技术的温室环境调控效果研究.docVIP

 基于 CFD 技术的温室环境调控效果研究# 程秀花1,2，左志宇1，毛罕平1** （1. 江苏大学现代农业装备与技术省部共建教育部/江苏省重点实验室，江苏 镇江 212013； 5 10 15 20 25 30 35 40 2. 扬州大学动物科技学院，江苏 扬州 225009） 摘要：以 Venlo 型两连栋玻璃温室为研究对象，基于计算流体动力学（CFD）技术，对春季 上午和中午两个典型时刻自然通风温室内微气候分布进行了 3 维数值模拟，并对模拟结果进 行了试验验证。提出了适合春季以上两个时刻的温室环境调控策略，对不同调控策略下除湿 降温效果进行了 CFD 预测。结果表明：天窗开度为 10°时，室温较正常开窗角度 21°至少 升高 1；天窗开度增大到 45°，室温较正常开窗角度降低 2左右。因此，室外光照和气 温不高的时段，可考虑减小天窗开度以达到除湿保温的目的；室外气温较高时，可加大天窗 开度，使室温维持在番茄作物适宜生长发育的水平。 关键词：温室；通风；温度；CFD；模拟 中图分类号：S625.5+1 Research on Effectiveness of Greenhouse Microclimates Control based on CFD Technique CHENG Xiuhua1,2, ZUO Zhiyu1, MAO Hanping1 (1. Key Laboratory of Modern Agricultural Equipment and Technology,Ministry of Education Jiangsu Province,Jiangsu University,Zhenjiang Jiangsu 212013; 2. Collage of Animal Science and Technology,Yangzhou University,Yangzhou,Jiangsu 225009) Abstract: In this paper,the 3-D numerical simulations were done based on the CFD technique for the natural ventilated Venlo glasshouse at the morning and the noon in the spring. The measured values were used to validate the CFD model. The greenhouse microclimate control strategy was proposed. The forecast was given for the effectiveness of dehumidify and cooling under the different control strategy. The results showed that the inside temperature was 1℃ higher at the roof-vents opening 10°than that of 21°. And it was 2℃ lower at roof –vents opening 45°than that of 21°.So,the effectiveness of dehumidity and cooling could be obtained by decreased the roof-vents opening degree when outside solar radiation and the temperature were lower.The inside temperature could be sustained suitable level for tomato crops growth by incereasing the roof-vents opening degree when outside temperature was higher. Key words: greenhouse; ventilation; temperature; CFD; simulation 0 引言 计算流体动力学（Computational Fluid Dynamics，简称 CFD）方法是对流体流动、传质 和传热进行数值模拟的一种强有力的工具。在设施园艺领域的应用主要集中在温室微气候模 拟方面。它以流体质量、动量和能量三大守恒方程为数值计算的理论依据，结合流体湍流模 型对温室内气流模式和温湿度、CO2 浓度等因子的空间分布进行 2 维或 3 维模拟和预测，并 将结果可视