Effect of covering materials on energy consumption and greenhouse microclimate
Effect of covering materials on energy consumption and greenhouse microclimate
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覆盖材料对能耗和温室小气候的影响
DOI：
10.1016/0168-1923(96)02332-5
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发表时间：
1996
影响因子：
6.2
通讯作者：
A. Gosselin
中科院分区：
文献类型：
--
作者：
Y. Zhang;L. Gauthier;D. Halleux;B. Dansereau;A. Gosselin
这项研究的目的是对不同的温室覆盖材料进行广泛的能源和小气候评估。比较了单玻璃(GL)覆层和三种类型的双层聚乙烯(PE)覆层。由内层防雾保温膜和外层标准PE膜组成的双层聚乙烯覆层是最节能的。它的平均测量换热系数(U值)为2.9W m−2K−1。另一种PE包层的平均U值为3.4W m−2K−1。夜间在PE室内使用隔热屏可使热损失率降低23-24%。不同覆层下的气候差异表现在PAR透过率和湿度水平上。冬季(11~3月)，玻璃、1年防雾、3年防雾和防雾保温层的平均PAR透过率分别为0.68、0.62、0.65和0.60。在夏季月份(4月至10月)，这些值更高。在冬季，双层PE膜的平均蒸汽压差比单玻璃低0.2kpa，但不同防雾膜之间没有显著差异。在双层PE房中使用保温屏仅略微增加了温室的湿度。并对辅助照明对温室供暖需求的贡献进行了介绍和讨论。
The objective of the study was to conduct an extensive energy and microclimatic assessment of different greenhouse covering materials. Single glass (GL) and three types of double polyethylene (PE) claddings were compared. The double polyethylene cladding consisting of an anti-fog thermal film for the inner layer and a standard PE film for the outer layer was the most energy efficient. It had an average measured heat transfer coefficient (U value) of 2.9 W m−2K−1. The average U value for the other PE cladding was 3.4 W m−2K−1. The use of thermal screens in the PE houses during the night reduced heat loss rates by 23–24%. The differences in climates under different claddings is presented in terms of PAR transmission and humidity levels. The measured average PAR transmission during the winter months (November–March) were 0.68, 0.62, 0.65 and 0.60 for glass, anti-fog 1-year, anti-fog 3-year and anti-fog thermal claddings, respectively. In the summer months (April–October) the values were higher. The average vapour pressure deficit in the double PE houses was found to be 0.2 kPa lower than under single glass during the winter season, but no significant difference was observed between various anti-fog films. The use of a thermal screen in a double PE houses caused only a slight increase in greenhouse humidity. The contribution of supplementary lighting to greenhouse heating demand is also presented and discussed.