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Predicting the Interior Conditions in a High Tunnel Greenhouse

  • Shreya Ghose
  • William LubitzEmail author
Conference paper
Part of the Springer Proceedings in Energy book series (SPE)

Abstract

Simple greenhouses constructed of polyethylene glazing over a steel frame with roll-up sides, called high tunnels, are used in horticulture to extend the growing season, improve crop quality, reduce disease, and reduce pest control issues. The high tunnel is effectively a passive solar structure installed over a crop that is grown using conventional, soil-based methods. Unlike large, hydroponic greenhouses, there are no fans or automated ventilation controls, nor any active heating or cooling systems. High-resolution measurements of air and soil temperatures, relative humidity, solar radiation, and wind speeds were recorded inside Quonset-style passive solar high tunnels, and adjacent open fields, for two growing seasons at two high tunnels in Guelph, Ontario. The side openings on one high tunnel were screened, while the other was left open. Lower than expected frost resistance was observed inside the high tunnels. A one-dimensional parametric energy model was developed to predict air and soil temperatures as a function of weather and high tunnel properties. The model was validated by comparing model predictions of air and soil temperatures to the measurements. A sensitivity study was conducted with the model using different combinations of parameter values to observe the effects of parameter choice on predicted high tunnel microclimate. Parametric models of high tunnel or greenhouse environments were found to be sensitive to choices of model parameters, such as soil, glazing, and thermal properties. The model and data collection was part of a longer study intended to benefit Canadian growers. An ability to accurately predict high tunnel microclimate will help growers choose crops best suited for high tunnels at their location. The data and models resulting from this study will also be useful for identifying methods of reducing energy costs in new high tunnel installations through structural changes and by modifying operating methods.

Notes

Acknowledgements

This project was financially supported by Agriculture and Argi-food Canada through the Agricultural Adaptation Council and by the Ontario Ministry of Agriculture, Food and Rural Affairs (OMAFRA) University of Guelph Partnership. The work reported here would not have been possible without the efforts of all those who contributed to the larger high tunnel project, including Youbin Zheng, Dave Llewellyn, Yun Kong, Evan Elford, Mary Ruth McDonald, Ralph Martin, Martha Gay Scroggins, Rene van Acker, and all the summer student volunteers who supported crop cultivation and research at the GCUOF.

References

  1. 1.
    Carey, E.E., Jett, L., Lamont Jr., W.J., Nennici, T.T., Orzolek, M.D., Williams, K.A.: Horticultural crop production in high tunnels in the United States: a snapshot. HortTechnology 19, 1 (2009)Google Scholar
  2. 2.
    O’Connell, S., Rivard, C., Peet, M.M., Chris, C., Louws, F.: High tunnel and field production of organic heirloom tomatoes: yield, fruit quality, disease, and microclimate. HortScience 47, 1283–1290 (2012)Google Scholar
  3. 3.
    Wittwer, S.H., Castilla, N.: Protected cultivation of horticultural crops worldwide. HortTechnology 5, 6–23 (1995)CrossRefGoogle Scholar
  4. 4.
    Wallace, R.W., et al.: Lettuce yield and quality when grown in high tunnel and open-field production systems under three diverse climates. HortTechnology 22, 659–668 (2012)CrossRefGoogle Scholar
  5. 5.
    Wien, H.C.: Microenvironmental Variations within the high tunnel. HortScience 44, 235–238 (2009)Google Scholar
  6. 6.
    Lubitz, D.: Reducing Canadian greenhouse energy costs using highly insulating glazing. In: World Renewable Energy Conference, London, UK, 3–8 August 2014Google Scholar
  7. 7.
    Boulard, T.: Recent trends in protected cultivations – microclimate studies: a review. Acta Hort. 057, 15–28 (2012)CrossRefGoogle Scholar
  8. 8.
    Zhao, X., Carey, E.E.: Summer production of lettuce, and microclimate in high tunnel and open field plots in Kansas. HortTechnology 19, 113–119 (2009)CrossRefGoogle Scholar
  9. 9.
    Katsoulas, N., et al.: Effect of vent openings and insect screens on greenhouse ventilation. Biosyst. Eng. 93(4), 427–436 (2006)CrossRefGoogle Scholar
  10. 10.
    Zheng. Y., Llewellyn, D., Dixon, M.: Investigation of the feasibility to improve the lighting environment under hanging baskets in greenhouse flower production. Technical report for Flowers Canada (2013)Google Scholar
  11. 11.
    Papadakis, G., et al.: Radiometric and thermal properties of, and testing methods for, greenhouse covering materials. J. Agric. Eng. Res. 2000(77), 7–38 (2000)CrossRefGoogle Scholar
  12. 12.
    Wien, H.C., Pritts, M.P.: Use of high tunnels in the Northeastern USA: adaptation to cold climates. Acta Hort. 807, 55–59 (2009)CrossRefGoogle Scholar
  13. 13.
    Ben-Yakir, D., et al.: Colored shading nets impede insect invasion and decrease the incidences of insect-transmitted viral diseases in vegetable crops. Entomol. Exp. Appl. 144, 249–257 (2012)CrossRefGoogle Scholar
  14. 14.
    Giordano, et al.: Effects of plastic screens on virus infection, yield and qualitative characteristics of small tomatoes. Acta Hort. 614, 735–740 (2003)CrossRefGoogle Scholar
  15. 15.
    Legarrea, S., et al.: Comparison of UV-absorbing nets in pepper crops: spectral properties. Photochem. Photobiol. 86, 324–330 (2010)CrossRefGoogle Scholar
  16. 16.
    Boulard, T., et al.: Improving air transfer through insect proof screens. Acta Hort. 893, 289–296 (2011)CrossRefGoogle Scholar
  17. 17.
    Muñoz, P., et al.: Natural ventilation of multi-span tunnel greenhouses with and without insect-proof screens. Acta Hort. 559, 263–269 (2001)CrossRefGoogle Scholar
  18. 18.
    Molina-Aiz, et al.: Effects of insect-proof screens used in greenhouse on microclimate and fruit yield of tomato (Solanum lycopersicum L.) in a Mediterranean climate. Acta Hort. 927, 707–714 (2012)CrossRefGoogle Scholar
  19. 19.
    Teitel, M.: The effect of screens on the microclimate of greenhouses and screenhouses – a review. Acta Hort. 719, 575–586 (2006)CrossRefGoogle Scholar
  20. 20.
    Mashonjowa, E., Ronsse, F., Milford, J.R., Pieters, J.G.: Modelling the thermal performance of a naturally ventilated greenhouse in Zimbabwe using a dynamic greenhouse climate model. Sol. Energy 91, 381–393 (2013)CrossRefGoogle Scholar
  21. 21.
    Roy, J.C., Boulard, T., Kittas, C., Wang, S.: PA—precision agriculture: convective and ventilation transfers in greenhouses, part 1: the greenhouse considered as a perfectly stirred tank. Biosyst. Eng. 83(1), 1–20 (2002)CrossRefGoogle Scholar
  22. 22.
    Zhang, Y., Mahrer, Y., Margolin, M.: Predicting the microclimate inside a greenhouse: an application of a one-dimensional numerical model in an unheated greenhouse. Agric. Forest Meteorol. 86(3), 291–297 (1997)CrossRefGoogle Scholar
  23. 23.
    Tong, G., Christopher, D.M., Li, B.: Numerical modelling of temperature variations in a Chinese solar greenhouse. Comput. Electron. Agric. 68(1), 129–139 (2009)CrossRefGoogle Scholar
  24. 24.
    Nebbali, R., Roy, J.C., Boulard, T.: Dynamic simulation of the distributed radiative and convective climate within a cropped greenhouse. Renew. Energy 43, 111–129 (2012)CrossRefGoogle Scholar
  25. 25.
    Zhong, W., Yu, A., Zhou, G., Xie, J., Zhang, H.: CFD simulation of dense particulate reaction system: approaches, recent advances and applications. Chem. Eng. Sci. 140, 16–43 (2016).  https://doi.org/10.1016/j.ces.2015.09.035CrossRefGoogle Scholar
  26. 26.
    Picheny, V., Trépos, R., Casadebaig, P.: Optimization of black-box models with uncertain climatic inputs-Application to sunflower ideotype design. PLoS ONE 12(5), 1–15 (2017).  https://doi.org/10.1371/journal.pone.0176815CrossRefGoogle Scholar
  27. 27.
    Kong, Y., Llewellyn, D., Schiestel, K., Scroggins, M.G., Lubitz, D., McDonald, M.R., Van Acker, R., Martin, R.C., Zheng, Y., Elford, E.: High tunnels can promote growth, yield, and fruit quality of organic bitter melons (Momordica charantia) in regions with cool and short growing seasons. HortScience 52(1), 65–71 (2017)CrossRefGoogle Scholar
  28. 28.
    Cengel, Y.A., Boles, M.A.: Thermodynamics: An Engineering Approach, 7th edn. McGraw-Hill, New York (2011)Google Scholar
  29. 29.
    Castilla, N.: Greenhouse Technology and Management, 2nd edn. CABI International, Wallingford (2013)CrossRefGoogle Scholar
  30. 30.
    Wang, S., Boulard, T.: Predicting the microclimate in a naturally ventilated plastic house in a Mediterranean climate. J. Agric. Eng. Res. 75(1), 27–38 (2000)CrossRefGoogle Scholar
  31. 31.
    USDA: Virtual Grower. Version 3 Manual. U.S. Department of Agriculture, Agricultural Research Service (2014). http://www.ars.usda.gov/services/software/download.htm?softwareid=309

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.School of EngineeringUniversity of GuelphGuelphCanada

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