Comparative Testing and Analysis of Winter Microclimate in Solar Greenhouses in Urumqi
To achieve winter production in greenhouses with natural light in the Urumqi region,ensuring the yield and quality of greenhouse crops,an increase in energy supply is needed to maintain the microclimate inside the greenhouse under suitable conditions for crop growth.This study focused on the impact of heating on the microclimate factors inside the greenhouse for wintering of crops in Urumqi,providing a reference basis for optimizing control strategies for production-oriented solar greenhouses in the region.Two identical greenhouses located at the Xishan Farm in Urumqi,were selected as the research subjects.Using a comparative experimental approach,the study tested and analyzed the changes in microclimate factors such as temperature,humidity,and light intensity inside the solar greenhouse under heated and non-heated conditions.The research findings indicated that when outdoor temperatures were maintained within the range of-14.5 to 3.7℃,heating could increase the nighttime air temperature inside the greenhouse by 10℃,the daytime temperature by 7℃,and the temperature of the back wall by 8℃.In comparison,the non-heated greenhouse during the testing period maintained daytime temperatures within the range of 4.0 to 33.1℃,nighttime temperatures within the range of 3.9 to 9.5℃,and back wall temperatures between 12.3 and 19.0℃.In the actual conditions of the region during winter,when the daily average outdoor temperature remains above-2 °C and there is sufficient sunlight,the option of not heating for overwintering cultivation can be chosen.When the outdoor average temperature falls within the range of-12.0 to 1.9℃,depending on the daytime sunlight conditions and the temperature requirements of the crops,it may be considered to heat the greenhouse at night to elevate the temperature inside.To ensure safe overwinter production in the Urumqi region using solar greenhouses,a significant amount of heat energy needs to be supplemented,leading to increased production energy consumption and costs.Based on an understanding of the dynamics of microclimatic changes within the greenhouse,effective energy consumption control strategies should be implemented to minimize energy consumption to the greatest extent possible while meeting the growth requirements of the crops,thereby reducing production costs.
Urumqisolar greenhousemicroclimateheating with hot air
国家科技期刊平台
NSTL
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