![]() The light and temperature conditions in solar greenhouses are controlled by solar energy. Zhang, respectively photo D is courtesy of Beijing Agricultural Bureau). Photos of a single-slope solar greenhouse: (A) exterior, (B) interior, (C) upper side of the double-arch solar greenhouse, and (D) a group of solar greenhouses. (D) Double-arch solar greenhouse (2007–present): structure parameters are the same as (C) except the double-arch frames 1 m = 3.2808 ft.Ĭitation: HortTechnology hortte 20, 3 10.21273/HORTTECH.20.3.626 The east and west walls have a wet curtain cooling system. The rolling up and down of the insulation blanket and ventilation vents are all automatic. (C) Modern solar greenhouse (1996-present): spans = 8.0 to 14.0 m, arch height = 3.8 to 5.5 m, walls of air-entrained brick, polystyrene slates, and perlite at 0.8 m non-pillar, zinc-coated steel frame. ![]() (B) Modified solar greenhouse (1986–95): spans = 6.0 to 8.0 m, arch height = 3.0 to 4.0 m frames are bamboo, steel, or a mixture of both, with two to three pillars inside soil wall thickness = 0.8 to 1.1 m with heterogeneous double layer transparent coverage materials polyethylene (PE) or polyvinyl chloride (PVC) with insulating blanket on it. (A) The primary solar greenhouse (before 1985): spans = 5.5 to 6.5 m, wall thickness = 0.5 to 0.7 m, arch height = 2.1 to 2.4 m steel frames and two to three pillars inside the greenhouse, no insulating blanket, the roof is glass. Models, structure parameters, and evolution of solar greenhouse structure in China. These greenhouses are used to produce warm season crops such as tomato ( Solanum lycopersicum) and cucumber ( Cucumis sativus) during the winter without using other forms of heat, in locations at latitude 32 oN to 43°N. 1C and 2, A and B) and is unique to northern China. This type of greenhouse uses solar energy as the sole light and heat source for winter crop production ( Figs. The south side is supported by metal or bamboo frames or a mixture of both, and is covered with plastic film and an insulating blanket. A short roof is installed on top of the north wall. ![]() The support and insulation walls are on the north, east, and west sides. There are several different types of solar greenhouses, including the single-slope solar greenhouse. These greenhouses play a vital role in China's vegetable production in winter. In recent years, new solar greenhouse technology has been developed in China. Protected horticulture production has a long history in China, and the earliest recordation is written in the Hanshu in the Han Dynasty (206–23 BCE) ( Jiang et al., 2004 Zhang, 2005). Keywords: global climate change carbon dioxide emissions CO2 non-transparent insulation materials back wall thickness low carbon production winter vegetables
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