单层和双层膜组装式日光温室环境性能比较分析

Comparative analysis on environmental performance of assembled solar greenhouse with single layer and double layer shed film

组装式日光温室普遍存在保温蓄热性能不佳的问题,采用前屋面双层薄膜覆盖提高组装温室保温性能,经对单层膜、双层膜温室和传统土墙温室温光环境观测分析。结果显示:单层和双层膜组装温室的保温性能均不如普通土墙温室,但双层膜较单层膜组装温室的保温性能明显提高,冬季较单层膜组装温室最低温度提高4.20℃,降温速度较单层膜温室低0.39℃/h。双层膜组装温室也存在透光率下降(较单层膜温室下降6.67%~15.60%)、相对湿度增大和通风能力不足等问题。在温室建造和管理中还需注意改进,提高温室的调控能力。

There is a general problem of poor heat preservation and thermal storage performance in assembled solar greenhouse,it can be improved by using double layer shed film on the front roof of solar greenhouse.The temperature and light environment on greenhouse with single layer,double layer film and traditional soil wall covering the front roof are observed and analyzed,the result showed,that the heat preservation performance of both single layer and double layer film assembled greenhouse were not as good as that of the ordinary soil wall greenhouse,however the double layer film was obviously better than the single layer film greenhouse,its minimum temperature increased 4.20℃than single layer greenhouse,and its cooling rate was 0.39℃/h lower than the single layer film greenhouse.There are also some problems in the double layer assembled greenhouse,such as decrease of light transmittance（decrease 6.67% -15.60% than single layer greenhouse）,and increase of relative humidity and insufficient ventilation ability.This should be paid attention to improve in the construction and management of assembled solar greenhouse,so as to improve the control ability of the greenhouse.