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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Scopus citations

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.

Original languageEnglish (US)
Title of host publicationProceedings of the International Symposium on High Technology for Greenhouse System Management, Greensys 2007
PublisherInternational Society for Horticultural Science
Pages393-400
Number of pages8
ISBN (Print)9789066056213
DOIs
StatePublished - Jan 1 2008
EventInternational Symposium on High Technology for Greenhouse System Management Greensys 2007 - Naples, Italy
Duration: Oct 4 2007Oct 6 2007

Publication series

NameActa Horticulturae
Volume801 PART 1
ISSN (Print)0567-7572

Other

OtherInternational Symposium on High Technology for Greenhouse System Management Greensys 2007
CountryItaly
CityNaples
Period10/4/0710/6/07

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Keywords

  • Control strategy
  • Cooling
  • Design
  • Modeling
  • Ventilation

ASJC Scopus subject areas

  • Horticulture

Cite this

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