Structure Configuration and Parameters of Solar Greenhouse in Northern Jiangsu Province
WANG Jun-wei，WANG Jian，SUN Jin，GUO Shi-rong*
College of Horticulture，Nanjing Agricultural University，Key Laboratory of Southern Vegetable Crop Genetic Improvement，Ministry of Agriculture，Nanjing 210095，Jiangsu，China
Abstract：The existing basic configurations and structure parameters of solar greenhouses in northern Jiangsu，including 5 dimensions, 4 ratios and 3 materials were investigated．And these greenhouses were classified according to their shapes of front roof and materials of rear wall，post of front room, and truss of front roof．The result showed that the solar greenhouse in northern Jiangsu could be divided into 3 main categories and 19 different configurations．The variation range of net span，ridge height，height and thickness of rear wall，front roof angle and rear slope angle of each configuration were 7.5-14.0 m，2.2-5.8 m，2.0-5.0 m，40-600 cm，14.0°-28.4°and 23.4°-48.0°，respectively．Most of the wall material was hollow block and rammed earth，and part of them were straw or without back wall．The materials of front roof arch were mostly galvanized steel pipe or bamboo pole，part of them were reinforced concrete and foam concrete．Except for SR-14，its heat preservation ratio is bigger than 1，that of the other solor greenhouses are less than 1．On this basis, the performances of structural safety，daylighting and heat preservation for solar greenhouses in northern Jiangsu were analyzed．Besides，2 configurations of solar greenhouses SRY-1 and SRY-2 were proposed，combining with the geographical and climatical characteristics in northern Jiangsu．They had better performances of structural safety，daylighting and heat preservation，with large indoor space and high land utilization rate，and were applied to modern agricultural zone and farmer households，respectively．
