The relationships between inside and outside temperature of solar greenhouse under different weather conditions

doi:10.14088/j.cnki.issn0439-8114.2021.15.012

Abstract

Abstract: In order to quantify the relationship between solar greenhouse temperature and external meteorological conditions under different weather conditions, the weather conditions were analysised based on sunshine percentage method, and the changing rules of temperature in greenhouse under different weather conditions were analyzed. The quantitative relationships between temperature in greenhouse and external meteorological conditions were studied by establishing a regression equation. The results showed that on sunny, cloudy and full-cloudy days, the maximum temperature appeared at 12：00, 12：00 and 13：00 in spring and autumn, and the minimum temperature appeared at 6：00, 7：00 and 7：00 in greenhouse. In winter, the maximum temperature appeared at 13：00, 13：00 and 14：00, and the minimum temperature all appeared at 8：00. The temperature rising time in greenhouse was about 1 h later than outside, and the cooling time varied, with 2~3 hours earlier than outside in spring and autumn, and 1~2 hours earlier in winter. When the number of consecutive overcast days was less than 3 days, for every 1 ℃ decrease in outdside minimum temperature in spring and autumn, the minimum temperature in greenhouse would decrease by about 0.25, 0.32 and 0.32 ℃ on sunny, cloudy, and full-cloudy days, and by about 0.34, 0.42 and 0.37 ℃ in winter. When the number of overcast days exceeds 3 days, for every 1 days of continuous overcast days, the minimum temperature in greenhouse would decrease by 0.33 ℃ in spring and autumn, and by 0.41 ℃ in winter. For every 1 ℃ decrease in the outdside minimum temperature, the minimum temperature in greenhouse would decrease by about 0.34 ℃.

Key words: solar greenhouse, inside and outside temperature relationship, different weather conditions, consecutive full-cloudy day

CLC Number:

S162.4

LI Wen-ke, CHEN Chen, LI Nan, DONG Zhi-qiang. The relationships between inside and outside temperature of solar greenhouse under different weather conditions[J]. HUBEI AGRICULTURAL SCIENCES, 2021, 60(15): 65-68.

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