RIDGE-POSITION RATIO OPTIMIZATION OF SAWTOOTH TYPE MULTI-SPAN GREENHOUSE BASED ON LIGHT ENVIRONMENT

Qi Zihao; Wei Min; Wang Shaojie; Guan Renhui; Sun Hongyu; Song Haoran

doi:10.19912/j.0254-0096.tynxb.2024-1140

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (11) : 395-404. DOI: 10.19912/j.0254-0096.tynxb.2024-1140

RIDGE-POSITION RATIO OPTIMIZATION OF SAWTOOTH TYPE MULTI-SPAN GREENHOUSE BASED ON LIGHT ENVIRONMENT

Qi Zihao¹, Wei Min², Wang Shaojie^1,2, Guan Renhui¹, Sun Hongyu², Song Haoran¹

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Abstract

A single span 8 m of the sawtooth type multi-span greenhouse （STMG） in Changde city is taken as the research object based on the requirements of production and engineering construction. Ladybug Tools, a new type of building environment simulation plug-in, was used to investigate the influence of the variation of orientation and ridge position on the light environment in the greenhouse, and the optimal ridge position of the STMG with east-west and south-north was obtained. The results show that the lighting performance of the STMG is the best when the ridge-position ratio is 5.6∶2.4. The daytime illuminance of the STMG in the north-south greenhouse is higher than that in the east-west greenhouse. Under the optimal ridge-position ratio, the difference of illuminance is small, but the difference of solar irradiance is large. The solar irradiance inside the east-west greenhouse is 7.47 W/m² higher than that inside the south-north greenhouse, which means that the east-west greenhouse has a stronger ability to acquire solar energy. This paper realizes the simulation of the light-environment of horticultural facilities based on Ladybug Tools, and obtains the optimal ridge-position ratio of the STMG.

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solar energy / agricultural buildings / greenhouse / sawtooth-type multi-span greenhouse / light environment / shape optimization

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Qi Zihao, Wei Min, Wang Shaojie, Guan Renhui, Sun Hongyu, Song Haoran. RIDGE-POSITION RATIO OPTIMIZATION OF SAWTOOTH TYPE MULTI-SPAN GREENHOUSE BASED ON LIGHT ENVIRONMENT[J]. Acta Energiae Solaris Sinica. 2025, 46(11): 395-404 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1140

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