农业日光温室环境通风特性研究
Study on environmental ventilation characteristics of agricultural solar greenhouses
摘要：
以西藏拉萨地区的日光温室为研究对象,结合温室实测数据及CFD数值模拟计算,研究了温室内风压通风、热压通风及耦合通风特性,得出雷诺数Re、风压、格拉晓夫数Gr、热压、温度、风速在温室内作物区和非作物区的分布规律。风压驱动下温室通风量最大,耦合风压和热压驱动下通风量其次,热压驱动下通风量最小。基于MATLAB对通风量数据进行了多元非线性拟合,得到了不同季度的风速影响因子和温度影响因子,构建了温室通风量计算模型。
Abstract：
Taking a solar greenhouse in Lhasa, Tibet as the research object, combined with greenhouse measured data and CFD numerical simulation calculations, the characteristics of wind pressure ventilation, thermal pressure ventilation and coupled ventilation in the greenhouse are studied, and the distribution laws of Re, wind pressure, Gr, thermal pressure, temperature and wind speed in crop and non-crop areas in the greenhouse are obtained. The greenhouse ventilation volume is the largest under wind pressure driving, is the second under coupled wind pressure and thermal pressure driving, and is the smallest under thermal pressure driving. Based on MATLAB, the ventilation volume data are fitted by multiple nonlinear regression, wind speed influence factors and temperature influence factors in different quarters are obtained, and a calculation model for greenhouse ventilation volume is constructed.
Keywords:agricultural solar greenhouse; ventilation characteristic; wind pressure ventilation; thermal pressure ventilation; coupled ventilation; ventilation volume