A Study of Direct Solar Radiation Transmission in Asymmetrical Multi-span Greenhouses using Scale Models and Simulation Models
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URI: http://hdl.handle.net/10835/16305
ISSN: 1537-5110
DOI: https://doi.org/10.1016/j.biosystemseng.2004.03.006
ISSN: 1537-5110
DOI: https://doi.org/10.1016/j.biosystemseng.2004.03.006
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Soriano, Teresa; Montero Camacho, Juan Ignacio; Sánchez-Guerrero Cantó, María Cruz; Medrano, Evangelina; Antón, Assumpcio; [et al.]Date
2004-06-02Abstract
Direct solar radiation transmission inside scale models of greenhouses with different roof slopes was measured and the results compared with calculations from a simulation model. Seven different roof slopes were tested, which had symmetrical and asymmetrical roof shapes: 8°–18°; 18°–8°; 27°–27°; 27°–45°; 36°–55°; 45°–27°; 55°–36° (8°–18° denoting that the south-facing slope was 8° and the north-facing one was 18°). Radiation transmission in scale models was quantified using linear solarimeters that integrated solar radiation along the cross-section of the span. The correlation between measured and calculated hourly and daily mean transmission values was good. Minor differences were attributed to the accumulation of dust and condensation on the scale models, two conditions that were not taken into account in the simulation model.
The results of the study showed that direct solar radiation transmission increased considerably as slope increased, up to a value close to 30°, especially i...
Palabra/s clave
Greenhouse microclimate
Modelling