E3S Web Conf.
Volume 356, 2022The 16th ROOMVENT Conference (ROOMVENT 2022)
|Number of page(s)||4|
|Section||Air Distribution and Ventilation Performance|
|Published online||31 August 2022|
A case study on airflow characteristics in greenhouses with adaptive wall-based attachment ventilation
School of Building Services Science and Engineering, Xi’an University of Architecture and Technology, 710055 Xi’an, China
* Corresponding author: email@example.com
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.
© The Authors, published by EDP Sciences, 2022
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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