Numerical modeling and analysis of the environment in a mechanically ventilated greenhouse

Fei-qing Wu; Li-bin Zhang; Fang Xu; Qing-lin Ai; Jiao-liao Chen

doi:10.1117/12.836760

10 July 2009 Numerical modeling and analysis of the environment in a mechanically ventilated greenhouse

Fei-qing Wu, Li-bin Zhang, Fang Xu, Qing-lin Ai, Jiao-liao Chen

Proceedings Volume 7491, PIAGENG 2009: Remote Sensing and Geoscience for Agricultural Engineering; 749106 (2009) https://doi.org/10.1117/12.836760
Event: International Conference on Photonics and Image in Agriculture Engineering (PIAGENG 2009), 2009, Zhangjiajie, China

Abstract

Multi-span Greenhouse cooling in summer is always a problem for the greenhouse industry in china, to solve this, the key is to accurately predict the distribution and change of greenhouse environment. At present, the influence of mechanical ventilation about a Venlo-type glass greenhouse on environment has not been reported. The environment model, which takes into account solar radiation, is modeled and the temperature change & distribution is numerically simulated in a mechanically ventilated greenhouse using CFD(Computational Fluid Dynamics),then the velocities and temperatures at key points are measured in a Venlo-type greenhouse. By comparing, the velocity error and the relative error is controlled in 0.08m/s and 7% , respectively. and the temperature error and the relative error is controlled in 2 degrees and 5% expect the individual, respectively. Although the values between simulated and measured have some errors, the curve trend shows that CFD simulation on the mechanical ventilation is effective. It will provide a theoretical basis on greenhouse structure optimization and energy saving in future.

Citation Download Citation

Fei-qing Wu, Li-bin Zhang, Fang Xu, Qing-lin Ai, and Jiao-liao Chen "Numerical modeling and analysis of the environment in a mechanically ventilated greenhouse", Proc. SPIE 7491, PIAGENG 2009: Remote Sensing and Geoscience for Agricultural Engineering, 749106 (10 July 2009); https://doi.org/10.1117/12.836760

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