Study On Greenhouse Climatic Regionalization And Heating Meteorological Parameters Of Multi-Span Greenhouse In China

In order to realize the influence of different climatic conditions on greenhouse, define the basic demands of greenhouse in different areas, the climatic regionalization of greenhouse in China has been made. The heating meteorological parameters of multi-span greenhouse have also been established so as to calculate the energy consumption in different climatic regions.1. The greenhouse climatic regionalization in China has been made for the first time by adopting the methods of comprehensive factor combining with dominant factor. Regionalization system includes 9 regions and 18 sub-regions.2. Selecting meteorological factors that play an important role on greenhouse production, the first regions are obtained by adopting principal component analysis to summarize the indexes, cluster analysis to calculate preliminary regions, and discriminant analysis to verify the results and estimate the border tendency.3. Using dominant index law, the regions are further divided into 18 sub-regions by drawing and analyzing the isopleth map of the indexes.4. Current situation and prospect of greenhouse development in different regions are analyzed and some suggestions are put forward from the pointview of climatology. Extreme climate characteristic and greenhouse basic demands in the every sub-regions are also given.5. Heating design temperature outside and heating period of multi-span greenhouse have been calculated and confirmed.6. Calculated and analyzed the energy consumptions in 18 greenhouse climatic sub-regions, and combined with the climate characteristic in the regions, the adaptability of multi-span greenhouse in different sub-regions have been appraised.7. Taking Beijing as an example, some energy-saving measures have been used to calculate the their energy reduce effects on multi-span greenhouse.