Experimental Investigation of Microclimate Within a Soilless Greenhouse

Based on extensive research into temperature distribution within greenhouse environments, this paper presents an experimental investigation conducted on a glass soilless greenhouse prototype situated in Tunis Manouba, with a focus on its response to a typical spring day. This investigation takes into consideration various influential environmental factors, including air velocity, solar radiation, ambient temperature, and ambient relative humidity. To collect temperature data, precise measurements were taken both inside and outside the soilless greenhouse, utilizing specialized measuring instruments. The experimental results indicate that the greenhouse environment exerts a direct impact on temperature, with the interior consistently exhibiting higher temperatures compared to the external surroundings. Notably, this study highlights the significant disparities in average temperature between the interior and exterior of the greenhouse at different times of the day. Specifically, at 13 h, the temperature differential is most pronounced, with variations of approximately 8 ℃. Conversely, at 10 h and 17 h, the temperature contrast becomes minimal and virtually identical across all measurement directions.