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אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
Air velocities in a naturally ventilated greenhouse
Year:
2006
Source of publication :
Acta Horticulturae
Authors :
ברק, מוטי
;
.
טייטל, מאיר
;
.
טנאי, יוסף
;
.
לירן, אור
;
.
Volume :
719
Co-Authors:
Teitel, M., Agricultural Engineering Institute, Agricultural Research Organization, Volcani Center, P.O.B. 6, Bet Dagan, 50250, Israel
Liran, O., Agricultural Engineering Institute, Agricultural Research Organization, Volcani Center, P.O.B. 6, Bet Dagan, 50250, Israel
Barak, M., Agricultural Engineering Institute, Agricultural Research Organization, Volcani Center, P.O.B. 6, Bet Dagan, 50250, Israel
Tanny, J., Institute of Soil, Water and Environmental Sciences, Agricultural Research Organization, Volcani Center, P.O.B. 6, Bet Dagan, 50250, Israel
Facilitators :
From page:
189
To page:
195
(
Total pages:
7
)
Abstract:
Natural ventilation is an important process in greenhouse cultivation. It is usually done by roof openings, side openings or a combination of both. Two modes of ventilation roof alone and side alone, were considered in this study to find their effect on ventilation rate and air velocity within a greenhouse in which roses were grown. Ventilation rate was estimated by the decay rate of a tracer gas (N2O) and by the mass balance of water vapor in the greenhouse air. A comparison between the results of the two methods gave a good agreement. Air velocity at four heights above the soil was measured at the center of the greenhouse with fine hot wires. It is shown that the mean air velocity obtained by dividing the ventilation flow rate by the cross sectional area of the greenhouse was a good estimate for the directly measured velocity when the greenhouse was ventilated by roof openings, but gave less good results when side ventilation was applied.
Note:
Related Files :
Air velocity
Rosa
Roses
Ventilation rate
Ventilation rate,Rosa
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר מתוך כינוס
;
.
Language:
אנגלית
Editors' remarks:
ID:
20357
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:35
Scientific Publication
Air velocities in a naturally ventilated greenhouse
719
Teitel, M., Agricultural Engineering Institute, Agricultural Research Organization, Volcani Center, P.O.B. 6, Bet Dagan, 50250, Israel
Liran, O., Agricultural Engineering Institute, Agricultural Research Organization, Volcani Center, P.O.B. 6, Bet Dagan, 50250, Israel
Barak, M., Agricultural Engineering Institute, Agricultural Research Organization, Volcani Center, P.O.B. 6, Bet Dagan, 50250, Israel
Tanny, J., Institute of Soil, Water and Environmental Sciences, Agricultural Research Organization, Volcani Center, P.O.B. 6, Bet Dagan, 50250, Israel
Air velocities in a naturally ventilated greenhouse
Natural ventilation is an important process in greenhouse cultivation. It is usually done by roof openings, side openings or a combination of both. Two modes of ventilation roof alone and side alone, were considered in this study to find their effect on ventilation rate and air velocity within a greenhouse in which roses were grown. Ventilation rate was estimated by the decay rate of a tracer gas (N2O) and by the mass balance of water vapor in the greenhouse air. A comparison between the results of the two methods gave a good agreement. Air velocity at four heights above the soil was measured at the center of the greenhouse with fine hot wires. It is shown that the mean air velocity obtained by dividing the ventilation flow rate by the cross sectional area of the greenhouse was a good estimate for the directly measured velocity when the greenhouse was ventilated by roof openings, but gave less good results when side ventilation was applied.
Scientific Publication
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