Given the aging of greenhouse facility, there is a need for investigating the transformation of existing greenhouses to maximize solar energy utilization. In this study, Chinese solar greenhouse (CSG) in the Beijing area served as an optimized prototype. A mathematical model was established to determine the range of CSG vertex positions.
The cold winter weather in northern China has hampered the development of Chinese agriculture, and in order to solve this problem, China has designed and introduced a unique facility: the solar greenhouse.
A promising prospect is shown by China's modern solar greenhouses at present levels of performances and costs exemplified by the photovoltaic (PV) greenhouses with a practicable payback period of less than 9 years.
There are also some other solar thermal greenhouses that have been applied in China's Beijing, Gansu, Xizang, etc. These greenhouses utilize heat-absorbing solar collectors accessed with circulation tubes to heat water for night space heating purpose.
3.2. Economic evaluation The economic evaluation including the cost, operating income and the payback time of the combined agriculture and solar system sectors is conducted to assess the potential of the application of modern solar greenhouses in China.
The Beijing Solar Heating Greenhouse Project is a demonstration project including 12 pilot modern greenhouses with coverage of 520 m 2 solar collectors . Through the solar heating system, the average temperature can be increased by 4–5 ℃.
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Qingzhou Huade Agricultural Equipment Co., Ltd. is a high-tech enterprise specializing in the design, research and development, production, sales, and installation of a new generation of intelligent greenhouses.
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A report sheds light on the fact 80% of the world''s solar panels are manufactured in China, which uses coal in the process - and the nation is on track to hold 95% of the market.
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China - the solar powerhouse China''s extensive solar strategy includes decentralized panels on houses or factories, as well as large-scale solar farms.
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