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Microclimate and crop performance in a tunnel greenhouse shaded by organic photovoltaic modules – Comparison with conventional shaded and unshaded tunnels
Biosystems Engineering ( IF 5.1 ) Pub Date : 2020-09-01 , DOI: 10.1016/j.biosystemseng.2020.06.007
Maayan Friman-Peretz , Shay Ozer , Farhad Geoola , Esther Magadley , Ibrahim Yehia , Asher Levi , Roman Brikman , Shelly Gantz , Avi Levy , Murat Kacira , Meir Teitel

The use of flexible and semi-transparent organic photovoltaic (OPV) modules as shading elements in a greenhouse tunnel with a tomato crop is presented. Experiments were performed in two similar greenhouse tunnels, covered by diffuse polyethylene sheet, during two summer growing seasons. In 2018, one tunnel was shaded using OPV modules (covering 37% of the roof area and resulting in 23% shading) and the second tunnel served as a control. In 2019, a 25% black shading screen was added to the control tunnel. The microclimate, yield, and physiological parameters were examined in the two tunnels. Results show that at noon (11:00 to 13:00), there was no significant difference in the mean seasonal (June–September 2018, May–August 2019) air temperature and humidity between the tunnels. In 2018, the tunnels differed in terms of the spatial radiation transmittance and leaf temperature. The average radiation level along the OPV tunnel centreline was much lower, and the radiation distribution was less homogeneous than in the control. In 2019, with similar shading percentages in the tunnels, similar average radiation levels were observed. The leaf temperature in the OPV was lower than in the control in 2018 and varied from higher to lower in 2019. The leaf area index (LAI), cumulative yield, and average fruit mass were higher in the OPV than in the control in 2018, and similar in 2019. The average value of the maximum power output of three OPV modules increased roughly linearly with irradiance.

中文翻译:

有机光伏组件遮蔽的隧道温室中的小气候和作物性能——与传统遮蔽和未遮蔽隧道的比较

介绍了在种植番茄作物的温室隧道中使用柔性和半透明有机光伏 (OPV) 模块作为遮阳元件。在两个夏季生长季节期间,在两个类似的温室隧道中进行了实验,这些隧道由扩散聚乙烯板覆盖。2018 年,一条隧道使用 OPV 模块进行遮阳(覆盖屋顶面积的 37%,导致 23% 的遮阳),第二条隧道用作对照。2019年,控制隧道增加了25%黑色遮光屏。在两个隧道中检查了小气候、产量和生理参数。结果显示,中午(11:00至13:00),隧道之间的平均季节性(2018年6月-9月,2019年5月-8月)气温和湿度没有显着差异。2018 年,隧道在空间辐射透射率和叶片温度方面有所不同。沿 OPV 隧道中心线的平均辐射水平要低得多,而且辐射分布比对照更不均匀。2019 年,由于隧道中的阴影百分比相似,观察到的平均辐射水平相似。2018年OPV叶温低于对照,2019年由高到低变化。OPV的叶面积指数(LAI)、累积产量和平均果实质量在2018年高于对照,与2019年类似。三个OPV组件的最大输出功率平均值随辐照度大致呈线性增长。并且辐射分布不如对照均匀。2019 年,由于隧道中的阴影百分比相似,观察到的平均辐射水平相似。2018年OPV叶温低于对照,2019年由高到低变化。OPV的叶面积指数(LAI)、累积产量和平均果实质量在2018年高于对照,与2019年类似。三个OPV组件的最大输出功率平均值随辐照度大致呈线性增长。并且辐射分布不如对照均匀。2019 年,由于隧道中的阴影百分比相似,观察到的平均辐射水平相似。2018年OPV叶温低于对照,2019年由高到低变化。OPV的叶面积指数(LAI)、累积产量和平均果实质量在2018年高于对照,与2019年类似。三个OPV组件的最大输出功率平均值随辐照度大致呈线性增长。
更新日期:2020-09-01
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