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פותח על ידי קלירמאש פתרונות בע"מ -
Gradients of temperature, humidity and CO2 along a fan-ventilated greenhouse
Year:
2010
Source of publication :
Biosystems Engineering
Authors :
אטיאס, מיכאל
;
.
ברק, מוטי
;
.
טייטל, מאיר
;
.
Volume :
106
Co-Authors:
Teitel, M., Institute of Agricultural Engineering, A.R.O., The Volcani Center, P.O.B. 6, Bet Dagan 50250, Israel
Atias, M., Institute of Agricultural Engineering, A.R.O., The Volcani Center, P.O.B. 6, Bet Dagan 50250, Israel
Barak, M., Institute of Agricultural Engineering, A.R.O., The Volcani Center, P.O.B. 6, Bet Dagan 50250, Israel
Facilitators :
From page:
166
To page:
174
(
Total pages:
9
)
Abstract:
Around the world in warm climates fans are used to ventilate commercial greenhouses. They are usually mounted at one end of the greenhouse and suck ambient air through openings at the opposite end. As the air moves from one end of the greenhouse to the other, gradients of temperature, humidity and CO2 develop along the structure. These gradients result in an inhomogeneous microclimate for the crop and are, therefore, undesirable for growers. Models to predict these gradients were developed for the case of constant (with respect to time) ventilation rate, and were verified by experiments in a greenhouse in which pepper was grown. The experimental results were based on measurements in which the 'open chamber' approach was applied to the whole greenhouse. The models were then used to predict changes in temperature, humidity ratio and CO2 concentration in the air along the greenhouse at different hours of the day. The model results show that the largest gradients are to be expected at around midday (11:00-12:00), when the intensity of solar radiation is greatest. © 2010 IAgrE.
Note:
Related Files :
Ambient air
greenhouses
Humidity ratio
Model results
Moisture
Sun
Ventilation
Ventilation rate
Warm climates
עוד תגיות
תוכן קשור
More details
DOI :
10.1016/j.biosystemseng.2010.03.007
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
21345
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:43
You may also be interested in
Scientific Publication
Gradients of temperature, humidity and CO2 along a fan-ventilated greenhouse
106
Teitel, M., Institute of Agricultural Engineering, A.R.O., The Volcani Center, P.O.B. 6, Bet Dagan 50250, Israel
Atias, M., Institute of Agricultural Engineering, A.R.O., The Volcani Center, P.O.B. 6, Bet Dagan 50250, Israel
Barak, M., Institute of Agricultural Engineering, A.R.O., The Volcani Center, P.O.B. 6, Bet Dagan 50250, Israel
Gradients of temperature, humidity and CO2 along a fan-ventilated greenhouse
Around the world in warm climates fans are used to ventilate commercial greenhouses. They are usually mounted at one end of the greenhouse and suck ambient air through openings at the opposite end. As the air moves from one end of the greenhouse to the other, gradients of temperature, humidity and CO2 develop along the structure. These gradients result in an inhomogeneous microclimate for the crop and are, therefore, undesirable for growers. Models to predict these gradients were developed for the case of constant (with respect to time) ventilation rate, and were verified by experiments in a greenhouse in which pepper was grown. The experimental results were based on measurements in which the 'open chamber' approach was applied to the whole greenhouse. The models were then used to predict changes in temperature, humidity ratio and CO2 concentration in the air along the greenhouse at different hours of the day. The model results show that the largest gradients are to be expected at around midday (11:00-12:00), when the intensity of solar radiation is greatest. © 2010 IAgrE.
Scientific Publication
You may also be interested in