PO和PVC薄膜温室的光温环境及其与薄膜流滴性的关系

本研究通过对ＰＯ薄膜和ＰＶＣ薄膜温室光温环境的连续测量，分析比较了两种温室光温环境，同时测量了薄膜内表面凝结水量的差异，推导出了计算温室内外气温差的简便计算式，在该计算式中包含了薄膜内表面凝结水量对透光率的影响

Light and Temperature Environment in PO and PVC Greeenhouses and Its Relationship With Condensation on the Films

The radiation and temperature environment of PO and PVC greenhouses were examined in this research. The main results are as follows: The highest transmittance of total solar radiation in PO greenhouse is 76.7 % and its aged deterioration is very little. The transmittance of PVC greenhouse dropped to 71.6 % from 88.9 % . Condensation on the film in PO greenhouse is very little with 40 g/m². It is up to 140 g/m² in the PVC greenhouse. And the performance of anti drop of PVC film decreased rapidly with ages. It was observed that the solar radiation transmittance of greenhouses declined 11% by 100g/m² of condensation on film. A ccording to the principle of heat budget, a new function was induced to evaluate the influence of condensation at the film on air temperature difference(in side-outside).