基于CFD的日光温室温度与卷帘开度关系研究  

Relationship between Indoor Temperature and Rolling Shutter Opening of Solar Greenhouse Based on CFD

作　　者：张国祥[1,2] 刘星星 张领先 傅泽田[2,4] 张琛驰 李鑫星 

机构地区：[1]中国农业大学工学院,北京100083 [2]食品质量与安全北京实验室,北京100083 [3]中国农业大学信息与电气工程学院,北京100083 [4]农业部农业信息获取技术重点实验室,北京100083

出　　处：《农业机械学报》2017年第9期279-286,共8页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金青年科学基金项目(51705520)

摘　　要：日光温室通过在棚面上覆盖卷帘保温材料的方式,可以有效地减少日光温室在外界环境温度较低情况下的热量散失,在前期研究的改进型日光温室后置固定式卷帘装置基础上进一步研究不同卷帘开度对于日光温室内部温度变化的影响。选择保温性质较好的保温被作为卷帘材料、简化北方地区较为典型的辽沈Ⅳ型日光温室结构,通过对日光温室的散热情况分析,得到日光温室内部温度的变化与其卷帘开度导致的保温材料与卷膜的覆盖面积变化存在着一定的线性关系。并通过CFD-Fluent仿真软件和验证性试验进行研究验证,结果表明:覆盖卷帘可以有效地减少日光温室的热量散失,维持室内适宜温度及其均匀性,在较为理想的环境条件下,日光温室内部温度变化与卷帘开度存在一定的线性关系,且日光温室内部温度由于棚面散热速率的差异所呈现的区域性差异也进一步验证了该结论。The solar greenhouse can effectively reduce the heat loss under the outdoor condition at low temperature by covering insulation materials. Based on the previous study of design and experiment of the rear fixed type rolling shutter device in solar greenhouse, in order to study the influence of rolling shutter opening on the temperature change in solar greenhouse, aimed at the insulation pads, the typical ＂Liaoshen Ⅳ ＂ solar greenhouse structure was simplified. The result suggested that the indoor temperature of solar greenhouse can be affected by the rolling shutter opening, which changed the covering area of insulation materials and heat dissipation rate of solar greenhouse. There was a linear proportional relationship between indoor temperature of solar greenhouse and rolling shutter opening. And then this theory was verified by CFD- Fluent. The following conclusion was drawn： covering the shutter can effectively reduce the heat loss and maintain appropriate indoor temperature and its uniformity for solar greenhouse. Under ideal conditions, the roiling shutter opening would change the covering area of insulation materials and lead to the differences of heat dissipation rate for solar greenhouse, at last, lead to the regional difference of inner temperature. And the relationship between changes of inner temperature and the value of rolling shutter opening was almost linear. The study intuitively reflected the relationship between indoor temperature and roller shutter opening of solar greenhouse, and provided a theoretical basis for further strengthening the precision control of rolling shutter machines, besides it would provide effective reference for greenhouse production practice in China, and it had an important theoretical and practical significance.

关 键 词：日光温室 温度 卷帘开度 CFD-Fluent仿真 试验 

分 类 号：S625[农业科学—园艺学]