ISHS Acta Horticulturae 761: XXVII International Horticultural Congress - IHC2006: International Symposium on Advances in Environmental Control, Automation and Cultivation Systems for Sustainable, High-Quality Crop Production under Protected Cultivation
DEVELOPMENTS IN THE COOLING OF AUSTRALIAN GREENHOUSES |
| Author: | G.J. Connellan |
| Keywords: | greenhouse design, natural ventilation, evaporative cooling, fog cooling, shading, fan pad, misting |
| Abstract:
The Australian greenhouse industry has shown strong growth both in the areas under protected cropping and the sophistication of the greenhouse design and environmental modification technology. A key issue for Australian greenhouses is the ability to provide optimum growing conditions during periods of high solar intensity and relatively high ambient temperatures. Over recent years there have been changes in greenhouse design, in particular in increased greenhouse wall height and improved natural ventilation. Greenhouse air temperatures during hot sunny periods have been further moderated using internal moveable screens. Fogging systems have been used in some situations to provide high temperature relief. Evaporative cooling systems are available however they are not commonly used in Australian greenhouses. This paper examines the performance and characteristics of the various greenhouse design and environmental modification technologies that growers can utilize to provide a growing environment that suits the crop and is economically viable for the enterprise. | |
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