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Radiation transmission differences in east-west oriented plastic greenhouses.

机译:东西向型塑料温室的辐射传输差异。

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摘要

In the Mediterranean coastal area of Spain there is an increasing trend to improve the technological level of the greenhouse industry, based on low-cost plastic greenhouses with very small roof slopes. In recent years, the growers are beginning to build east-west oriented plastic greenhouses with saddle roofs of higher slopes. This east-west orientation improves the greenhouse transmission in the autumn and winter, compared to the north-south orientation, but generates radiation transmission differences within the different zones of the greenhouse. A first study on radiation transmission differences, using scale models and monitored at eave height between the various spans of east-west oriented multi span greenhouses, showed relevant differences with higher transmission in the southern located span during winter solstice. These results point out that conclusions of radiation studies on single span greenhouses are not suitable for multispans. A second study on the spatial uniformity of radiation throughout the spans of three different roof geometry multispan greenhouses, east-west oriented, quantified using linear solarimeters at the eave level and shows relevant differences along the transversal section of the span.
机译:在西班牙的地中海沿岸地区,基于具有很小的屋顶坡度的低成本塑料温室,提高温室产业技术水平的趋势正在上升。近年来,种植者开始建造东西向的塑料温室,其大棚的马鞍形屋顶。与南北向相比,这种东西向的定向方式在秋季和冬季改善了温室的透射率,但在温室的不同区域内产生了辐射透射率的差异。首次使用比例模型对辐射透射差异进行了研究,并在东西向定向的多跨度温室的不同跨度之间进行了屋檐高度的监测,结果表明冬至期间,位于南部跨度较高的透射率具有相关的差异。这些结果指出,单跨温室的辐射研究结论不适用于多跨温室。第二个研究是使用线性日光计在屋檐水平对三个不同屋顶几何形状的多跨温室(东西向)在整个跨度上的辐射空间均匀性进行了研究,并显示了沿跨度横截面的相关差异。

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