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Life Sciences Commons

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Agriculture

Iowa State University

2005

Biological and Process Engineering and Technology

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Full-Text Articles in Life Sciences

A One-Year Study Of A Supplemental Air Distribution System For Greenhouses, Samuel Jason Ray, James Baxter Wills Jr., Gary Stephen Honea, Michael Jerome Buschermoble, Richard Allen Straw, D. Raj Raman Jan 2005

A One-Year Study Of A Supplemental Air Distribution System For Greenhouses, Samuel Jason Ray, James Baxter Wills Jr., Gary Stephen Honea, Michael Jerome Buschermoble, Richard Allen Straw, D. Raj Raman

D. Raj Raman

The effect of a supplemental air distribution system was evaluated in a greenhouse producing tomatoes (Lycopersicon esculentum Mill cv. Trust). The system used centrifugal fans to force warmer air from above the canopy through a perforated duct extending longitudinally through each double-canopy row, with the goal of improving yield and decreasing energy use. The experiment employed two commercial-size greenhouses, one as the treatment greenhouse with the air distribution system and one as the control using conventional air handling. The experiment duration was two growing seasons (spring and fall crop). The system significantly reduced vertical temperature and relative humidity gradients while …