Effect of vent configuration and wind speed on three-dimensional temperature distributions in a naturally ventilated multi-span greenhouse by wind tunnel experiments
M. Kacira, S. Sase, A. Ikeguchi, M. Ishii, G. Giacomelli, N. Sabeh
Agriculture and Biosystems Engineering
This study was conducted to determine the effects of vent configuration and external wind speed on three-dimensional distribution of air temperature in a naturally ventilated multi-span greenhouse using wind tunnel experiments. The experiments were conducted with the scale models in a wind tunnel with four different vent configurations and at four external wind speeds ranging from 0 to 3 m/s at full scale, with 1 m/s increments. Three dimensional temperature distributions were analyzed and the airflow patterns were observed based on temperature distributions. The highest air temperatures were found to be in spans close to the leeward side vent when the side vents were closed at zero wind speeds in the case when the roof vents were fully open and side vents were closed. The air temperature, measured by thermocouples, was higher on the windward side of the greenhouse than on the leeward side for all wind speeds when only roof vents were used. The distribution of air temperature was more uniform when both side and roof vents were used. As the wind speed increased, the average internal air temperature decreased for all cases. Contribution of side vents for greenhouse ventilation and reduction of air temperature were significant for the particular greenhouse design used in this study.
Proceedings of the International Symposium on High Technology for Greenhouse System Management, Greensys 2007
https://doi.org/10.17660/actahortic.2008.801.41
International Symposium on High Technology for Greenhouse System Management Greensys 2007 - Naples, Italy
Duration: Oct 4 2007 → Oct 6 2007
801 PART 1
International Symposium on High Technology for Greenhouse System Management Greensys 2007
Control strategy
10.17660/actahortic.2008.801.41
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wind tunnels Agriculture & Biology
wind speed Agriculture & Biology
air temperature Agriculture & Biology
greenhouses Agriculture & Biology
temperature Agriculture & Biology
internal temperature Agriculture & Biology
thermocouples Agriculture & Biology
air flow Agriculture & Biology
Kacira, M., Sase, S., Ikeguchi, A., Ishii, M., Giacomelli, G., & Sabeh, N. (2008). Effect of vent configuration and wind speed on three-dimensional temperature distributions in a naturally ventilated multi-span greenhouse by wind tunnel experiments. In Proceedings of the International Symposium on High Technology for Greenhouse System Management, Greensys 2007 (pp. 393-400). (Acta Horticulturae; Vol. 801 PART 1). International Society for Horticultural Science. https://doi.org/10.17660/actahortic.2008.801.41
Effect of vent configuration and wind speed on three-dimensional temperature distributions in a naturally ventilated multi-span greenhouse by wind tunnel experiments. / Kacira, M.; Sase, S.; Ikeguchi, A.; Ishii, M.; Giacomelli, G.; Sabeh, N.
Proceedings of the International Symposium on High Technology for Greenhouse System Management, Greensys 2007. International Society for Horticultural Science, 2008. p. 393-400 (Acta Horticulturae; Vol. 801 PART 1).
Kacira, M, Sase, S, Ikeguchi, A, Ishii, M, Giacomelli, G & Sabeh, N 2008, Effect of vent configuration and wind speed on three-dimensional temperature distributions in a naturally ventilated multi-span greenhouse by wind tunnel experiments. in Proceedings of the International Symposium on High Technology for Greenhouse System Management, Greensys 2007. Acta Horticulturae, vol. 801 PART 1, International Society for Horticultural Science, pp. 393-400, International Symposium on High Technology for Greenhouse System Management Greensys 2007, Naples, Italy, 10/4/07. https://doi.org/10.17660/actahortic.2008.801.41
Kacira M, Sase S, Ikeguchi A, Ishii M, Giacomelli G, Sabeh N. Effect of vent configuration and wind speed on three-dimensional temperature distributions in a naturally ventilated multi-span greenhouse by wind tunnel experiments. In Proceedings of the International Symposium on High Technology for Greenhouse System Management, Greensys 2007. International Society for Horticultural Science. 2008. p. 393-400. (Acta Horticulturae). https://doi.org/10.17660/actahortic.2008.801.41
Kacira, M. ; Sase, S. ; Ikeguchi, A. ; Ishii, M. ; Giacomelli, G. ; Sabeh, N. / Effect of vent configuration and wind speed on three-dimensional temperature distributions in a naturally ventilated multi-span greenhouse by wind tunnel experiments. Proceedings of the International Symposium on High Technology for Greenhouse System Management, Greensys 2007. International Society for Horticultural Science, 2008. pp. 393-400 (Acta Horticulturae).
@inproceedings{3ff3385f6b354f0d9d2d818db9f90a8d,
title = "Effect of vent configuration and wind speed on three-dimensional temperature distributions in a naturally ventilated multi-span greenhouse by wind tunnel experiments",
abstract = "This study was conducted to determine the effects of vent configuration and external wind speed on three-dimensional distribution of air temperature in a naturally ventilated multi-span greenhouse using wind tunnel experiments. The experiments were conducted with the scale models in a wind tunnel with four different vent configurations and at four external wind speeds ranging from 0 to 3 m/s at full scale, with 1 m/s increments. Three dimensional temperature distributions were analyzed and the airflow patterns were observed based on temperature distributions. The highest air temperatures were found to be in spans close to the leeward side vent when the side vents were closed at zero wind speeds in the case when the roof vents were fully open and side vents were closed. The air temperature, measured by thermocouples, was higher on the windward side of the greenhouse than on the leeward side for all wind speeds when only roof vents were used. The distribution of air temperature was more uniform when both side and roof vents were used. As the wind speed increased, the average internal air temperature decreased for all cases. Contribution of side vents for greenhouse ventilation and reduction of air temperature were significant for the particular greenhouse design used in this study.",
keywords = "Control strategy, Cooling, Design, Modeling, Ventilation",
author = "M. Kacira and S. Sase and A. Ikeguchi and M. Ishii and G. Giacomelli and N. Sabeh",
doi = "10.17660/actahortic.2008.801.41",
series = "Acta Horticulturae",
publisher = "International Society for Horticultural Science",
booktitle = "Proceedings of the International Symposium on High Technology for Greenhouse System Management, Greensys 2007",
note = "International Symposium on High Technology for Greenhouse System Management Greensys 2007 ; Conference date: 04-10-2007 Through 06-10-2007",
T1 - Effect of vent configuration and wind speed on three-dimensional temperature distributions in a naturally ventilated multi-span greenhouse by wind tunnel experiments
AU - Kacira, M.
AU - Sase, S.
AU - Ikeguchi, A.
AU - Ishii, M.
AU - Giacomelli, G.
AU - Sabeh, N.
N2 - This study was conducted to determine the effects of vent configuration and external wind speed on three-dimensional distribution of air temperature in a naturally ventilated multi-span greenhouse using wind tunnel experiments. The experiments were conducted with the scale models in a wind tunnel with four different vent configurations and at four external wind speeds ranging from 0 to 3 m/s at full scale, with 1 m/s increments. Three dimensional temperature distributions were analyzed and the airflow patterns were observed based on temperature distributions. The highest air temperatures were found to be in spans close to the leeward side vent when the side vents were closed at zero wind speeds in the case when the roof vents were fully open and side vents were closed. The air temperature, measured by thermocouples, was higher on the windward side of the greenhouse than on the leeward side for all wind speeds when only roof vents were used. The distribution of air temperature was more uniform when both side and roof vents were used. As the wind speed increased, the average internal air temperature decreased for all cases. Contribution of side vents for greenhouse ventilation and reduction of air temperature were significant for the particular greenhouse design used in this study.
AB - This study was conducted to determine the effects of vent configuration and external wind speed on three-dimensional distribution of air temperature in a naturally ventilated multi-span greenhouse using wind tunnel experiments. The experiments were conducted with the scale models in a wind tunnel with four different vent configurations and at four external wind speeds ranging from 0 to 3 m/s at full scale, with 1 m/s increments. Three dimensional temperature distributions were analyzed and the airflow patterns were observed based on temperature distributions. The highest air temperatures were found to be in spans close to the leeward side vent when the side vents were closed at zero wind speeds in the case when the roof vents were fully open and side vents were closed. The air temperature, measured by thermocouples, was higher on the windward side of the greenhouse than on the leeward side for all wind speeds when only roof vents were used. The distribution of air temperature was more uniform when both side and roof vents were used. As the wind speed increased, the average internal air temperature decreased for all cases. Contribution of side vents for greenhouse ventilation and reduction of air temperature were significant for the particular greenhouse design used in this study.
KW - Control strategy
KW - Cooling
KW - Design
KW - Modeling
KW - Ventilation
U2 - 10.17660/actahortic.2008.801.41
DO - 10.17660/actahortic.2008.801.41
T3 - Acta Horticulturae
BT - Proceedings of the International Symposium on High Technology for Greenhouse System Management, Greensys 2007
PB - International Society for Horticultural Science
T2 - International Symposium on High Technology for Greenhouse System Management Greensys 2007
Y2 - 4 October 2007 through 6 October 2007