摘要
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。
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/m 2. It is up to 140 g/m 2 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 100 g/m 2 of condensation on film. According to the principle of heat budget, a new function was induced to evaluate the influence of condensation at the film on air temperature difference (inside outside).
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
1997年第1期130-134,共5页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家自然科学基金
关键词
温室
薄膜
光温环境
流滴性
Greenhouse PO and PVC film Light and temperature environment Anti drop
