Computational analysis of ventilation in greenhouses at zero- and low-wind-speeds

被引:109
作者
Mistriotis, A
Arcidiacono, C
Picuno, P
Bot, GPA
Scarascia-Mugnozza, G
机构
[1] DLO, IMAG, Dept Agrophys, NL-6700 AA Wageningen, Netherlands
[2] Agr Univ Wageningen, Dept Agr Engn & Phys, NL-6703 HD Wageningen, Netherlands
[3] Univ Catania, Inst Agr Bldg, I-95123 Catania, Italy
[4] Univ Basilicata, Tech Econ Dept, I-85100 Potenza, Italy
[5] Univ Bari, Inst Farm Bldg, I-70126 Bari, Italy
关键词
greenhouses; natural ventilation; heat sources; buoyancy effect;
D O I
10.1016/S0168-1923(97)00045-2
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
A systematic analysis of the natural ventilation process in greenhouses at no-wind and low-wind-speed conditions was performed with the use of Computational Fluid Dynamics (CFD). The validity of this approach was first checked with success by comparing the numerical results with experimental data obtained from the literature. Numerical predictions of the ventilation efficiency of typical Mediterranean-type greenhouses were obtained for various ventilator configurations. These computer simulations were based on a realistic representation of the heat sources and the boundary conditions related to the problem. The contribution of specific ventilators to the greenhouse air renewal was analysed. The importance of side-wall ventilators for an efficient thermally driven ventilation ('buoyancy effect') was confirmed. It was demonstrated that CFD is a powerful tool for developing improved designs with respect to ventilation efficiency. (C) 1997 Elsevier Science B.V.
引用
收藏
页码:121 / 135
页数:15
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