Simulation Study on the Effect of Greenhouse Azimuth on Light Environment of Sunlight Greenhouse(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Title:: Simulation Study on the Effect of Greenhouse Azimuth on Light Environment of Sunlight Greenhouse

Author(s):: YANG Wenxiong1; 2; 3; MA Chengwei 2; 3; （1.Beijing Vocational College of Agriculture，Beijing 102206;2.College of Irrigation and Civil Engineering，China Agricultural University，Beijing 100083；3.China Key Lab of Bioenvironmental Engineering，Ministry of Agriculture，Beijing 100083)

Keywords:: greenhouse azimuth; sunlight greenhouse; light environment; evaluation

Abstract:: The effects of greenhouse azimuth on the indoor illumination of greenhouse were evaluated from five aspects（the average transmittance of the front roof，the average radiation intensity of the greenhouse，the cumulative radiation energy per unit length，total light radiation energy in the length of greenhouse and the percentage of direct light).The results showed that at the moment of the high noon as the axis of symmetry，with the change of the greenhouse azimuth，the change of the evaluation index of the greenhouse light environment was not obvious.In the south，the total amount of light in the solar greenhouse was the largest，but only 0.45 MJ larger than the minimum.In the actual production，taking into account the influence of the curtain time of the solar greenhouse，the greenhouse azimuth angle should be adjusted，if greenhouse azimuth was appropriate to south east，the curtain should be opened earlier，if greenhouse azimuth was appropriate to south west，the curtain should be opened later.

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Last Update: 2016-11-03