西北型日光温室内风速分布及其与室外风速和通风面积的关系

通风对调节温室内小气候有重要作用。试验通过对温室内、外共10个观测点不同高度风速的测量分析,研究了西北型节能日光温室内的风速分布规律及室外风速与通风面积对室内风速的影响。结果表明,西北型节能日光温室中的风速日变化呈双峰曲线;风速在水平方向上的分布由东到西差异不大,由南至北呈V字型分布;温室内的风速折减率随高度的增加而增加;室内温升值随通风面积的增大而减小。西北型日光温室最佳通风面积比是18%~25%。

Distribution law of inside wind speed and relationship between wind speed inside and outside and ventilation area ratio in northwest type sunlight greenhouse

Ventilation is important in regulating the microclimate in the greenhouse.The study on air speed distribution in the energy-saving sunlight greenhouse of northwest type is carried by analyzing 10 different points in the greenhouse in this paper.The result shows that the daily curve of air speed is a double apex curve;air speed inside has no significanct difference from east to west;it presents V shape curve distribution from the south to north of the greenhouse;and the reduced rate risesed with the height.The optimal ventilation area ratio is 18%-25%.