Development of a Machine Learning Natural Ventilation Rate Model by Studying the Wind Field Inside and Around Multiple-Row Chinese Solar Greenhouses
文献类型： 外文期刊
作者： Liu, Ran 1 ; Shi, Yunyan 2 ; Bournet, Pierre-Emmanuel 3 ; Liu, Kaige 1 ;
作者机构： 1.Beijing Acad Agr & Forestry Sci, Informat Technol Res Ctr, Natl Engn Res Ctr Informat Technol Agr, Natl Engn Lab Agriprod Qual Traceabil,Meteorol Ser, Beijing 100097, Peoples R China
2.Shihezi Univ, Dept Hort, Agr Coll, Shihezi 832003, Peoples R China
3.Inst Agro Rennes Angers, EPHor, SFR 4207 QuaSaV, F-49045 Angers, France
关键词： CFD; multiple Chinese solar greenhouses; airflow pattern; regression trees; natural ventilation model
期刊名称：HORTICULTURAE （ 影响因子：3.0； 五年影响因子：3.2 ）
ISSN：
年卷期： 2024 年 10 卷 11 期
页码：
收录情况： SCI
摘要： This paper experimented with a methodology of machine learning modelling using virtual samples generated by fast CFD (Computational Fluid Dynamics) simulations in order to predict the greenhouse natural ventilation. However, the output natural ventilation rates using fast two-dimensional (2D) CFD models are not always consistent with the three-dimensional (3D) one for all the scenarios. The first contribution of this paper is a proposed comparative modelling methodology between two-dimensional and three-dimensional CFD studies, regarding its validity, especially when buildings are in rows. The results show that the error of the ventilation rate prediction could exceed 50%, if 2D models are not properly used. Subsequently, in those scenarios where the 2D and the 3D models had equal accuracy, nearly one thousand samples were generated using fast 2D CFD simulations to train a natural ventilation rate regression tree model. This model is efficient to deal with the combined effect of wind pressure and thermal gradients under various vent configurations, with only four necessary inputs. In addition, by analyzing the wind speed distribution contour of the outdoor wind field around the greenhouse rows, the optimal wind speed-measuring locations were determined to eliminate interference for predicting the natural ventilation rate.
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