Analysis of Heat and Mass Distribution in a Single- and Multi-Span Greenhouse Microclimate

Recently, heat and mass distributions within a greenhouse were assumed to be homogeneous. Heat is gained or lost in absolute terms, crop contribution its effect not considered. In this study, statistical analyses conducted establish the significance of variation at sensor nodes two single-span multi-span greenhouses. Three greenhouses used 168 m2 floor area single-layered (SLG), double-layered (DLG) gothic roof type greenhouses, 7572.6 (MSG). The microclimatic parameters investigated temperature (T), relative humidity (RH), solar radiation (SR), carbon dioxide (CO2), vapor pressure deficit (VPD). To check their horizontal distribution, all microclimate data collected from each node subjected descriptive statistics Tukey honestly significant difference (HSD) test. lowest minimum temperatures 2.93 °C, 3.33 °C 10.50 recorded points SLG, DLG, MSG, respectively, whereas highest maximum 29.17 29.07 27.20 point, respectively. between center side into was approximately 0.88–1.0 MSG 1.03 °C. Significant observed distribution T, RH, SR, VPD MSG. Also CO2 Estimating energy demand should done based on rather than assuming homogeneity, especially for with as control parameter. Such estimation also using model that considers instant changes air temperature.