文章基本信息

标题：A case study on airflow characteristics in greenhouses with adaptive wall-based attachment ventilation
本地全文：下载
作者：Ou Han ; Angui Li ; Jiaxing Li 等
期刊名称：E3S Web of Conferences
印刷版ISSN：2267-1242
电子版ISSN：2267-1242
出版年度：2022
卷号：356
页码：1-4
DOI：10.1051/e3sconf/202235601007
语种：English
出版社：EDP Sciences
摘要：Modern greenhouses require not only heat preservation in winter but also temperature control in summer to provide a suitable growth environment. The efficiency and homogeneity of ventilation and cooling systems for greenhouses have always been challenges for facility agriculture engineering. This paper proposes the application of adaptive wall-based attachment ventilation (AWAV) in greenhouses. The case study on airflow characteristics and thermal environment of a typical greenhouse under AWAV mode are investigated numerically with the standard k-ε turbulent model, a solar ray tracing algorithm, and a surface-to-surface (S2S) radiation model. The ventilation performance of AWAV for greenhouses is examined and evaluated by air velocity and temperature distribution, non-uniformity coefficient, and ventilation efficiency. The results show that AWAV mode presents a more uniform airflow distribution (Ku=0.31, Kt=0.10) in the plant growth region, with relatively low temperature and an excellent cooling effect (ET =1.39). In addition, another advantage of AWAV mode is that the height of the deflector can be adjusted as the plant grows to meet the required air environment of greenhouses.