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Received: 2004-12-31

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Journal of Zhejiang University SCIENCE B 2005 Vol.6 No.6 P.523~529

http://doi.org/10.1631/jzus.2005.B0523


Prediction and analysis model of temperature and its application to a natural ventilation multi-span plastic greenhouse equipped with insect-proof screen


Author(s):  LIU Shu-zhen, HE Yong, ZHANG Yu-bao, MIAO Xiang-wen

Affiliation(s):  School of Biosystems Engineering and Food Science, zhejiang university, Hangzhou 310029, China; more

Corresponding email(s):   shuzhenl@163.com, yhe@zju.edu.cn

Key Words:  Greenhouse, Natural ventilation, Temperature, Model


LIU Shu-zhen, HE Yong, ZHANG Yu-bao, MIAO Xiang-wen. Prediction and analysis model of temperature and its application to a natural ventilation multi-span plastic greenhouse equipped with insect-proof screen[J]. Journal of Zhejiang University Science B, 2005, 6(6): 523~529.

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author="LIU Shu-zhen, HE Yong, ZHANG Yu-bao, MIAO Xiang-wen",
journal="Journal of Zhejiang University Science B",
volume="6",
number="6",
pages="523~529",
year="2005",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.2005.B0523"
}

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%T Prediction and analysis model of temperature and its application to a natural ventilation multi-span plastic greenhouse equipped with insect-proof screen
%A LIU Shu-zhen
%A HE Yong
%A ZHANG Yu-bao
%A MIAO Xiang-wen
%J Journal of Zhejiang University SCIENCE B
%V 6
%N 6
%P 523~529
%@ 1673-1581
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%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2005.B0523

TY - JOUR
T1 - Prediction and analysis model of temperature and its application to a natural ventilation multi-span plastic greenhouse equipped with insect-proof screen
A1 - LIU Shu-zhen
A1 - HE Yong
A1 - ZHANG Yu-bao
A1 - MIAO Xiang-wen
J0 - Journal of Zhejiang University Science B
VL - 6
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SP - 523
EP - 529
%@ 1673-1581
Y1 - 2005
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.2005.B0523


Abstract: 
The natural ventilation widely used in greenhouses has advantages of saving energy and reducing expense. In order to provide information for climate control of greenhouse, a model was developed to predict the variation of air temperature in the naturally ventilated greenhouse equipped with insect-proof screen. Roof ventilation and combined roof and sidewall ventilation were considered in the model. This model was validated against the results of experiments conducted in the greenhouse when the wind was parallel to the gutters. The model parameters were determined by the least squares method. In the used model, effects of wind speed and window opening height on the air temperature variation were analyzed. Comparison between two types of ventilation showed that there existed a necessary ventilation rate which results in air temperature decrease in natural ventilation under special climatic conditions. In our experiments when wind speed was less than 3.2 ms−1, wind had a more gradual effect on greenhouse temperature for roof ventilation, compared with combined roof and sidewall ventilation, which had greater air temperature decrease than roof ventilation only.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Reference

[1] Andre, N., Albright, L.D., 1994. Criterion for establishing similar air flow patterns (isothermals) in slotted-inlet ventilated enclosures. Trans. ASAE, 37:235-250.

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[4] Boulard, T., Meneses, J.F., Mermier, M., Papadakis, G., 1996. The mechanisms involved in the natural ventilation of greenhouse. Agricultural and Forest Meteorology, 79:61-77.

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[6] Kittas, C., Draoui, B., Boulard, T., 1995. Quantification of the ventilation of a greenhouse with roof opening. Agricultural and Forest Meteorology, 77:95-111.

[7] Kittas, C., Boulard, T., Papadakis, G., 1997. Natural ventilation of a greenhouse with ridge and side openings: Sensitivity to temperature and wind effects. Trans. ASAE, 40(2):415-425.

[8] Linden, P.F., Lane-Serf, G.F., Smeed, D.A., 1990. Emptying filling Boxes: The fluid mechanics of natural ventilation. Journal of Fluid Mechanics, 212:309-335.

[9] Papadakis, G., Mermier, M., Meneses, J.F., Boulard, T., 1996. Measurements and analysis of air exchange rates in a greenhouse with continuous roof and side openings. Journal of Agricultural Engineering Research, 63:219-228.

[10] Pearson, C.C., Owen, J.E., 1994. The resistance to air flow of farm building ventilation components. Journal of Agricultural Engineering Research, 57:53-65.

[11] Pérez Parra, J., Baeza, E., Montero, J.I., Bailey, B.J., 2004. Natural ventilation of parral greenhouse. Biosystems Engineering, 87(3):355-366.

[12] Teitel, M., Tanny, J., 1999. Natural ventilation of greenhouse: Experiments and model. Agricultural and Forest Meteorology, 96:59-70.

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Open peer comments: Debate/Discuss/Question/Opinion

<1>

lazhar serir@uraer<lserir@hotmail.com>

2010-06-14 04:36:27

this paper is very interesting for my research work

lazharserir@uraer<lserir@uraer.dz>

2010-06-14 04:30:12

Prediction and analysis model

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