TY - JOUR
T1 - Microclimate and crop performance in a tunnel greenhouse shaded by organic photovoltaic modules – Comparison with conventional shaded and unshaded tunnels
AU - Friman-Peretz, Maayan
AU - Ozer, Shay
AU - Geoola, Farhad
AU - Magadley, Esther
AU - Yehia, Ibrahim
AU - Levi, Asher
AU - Brikman, Roman
AU - Gantz, Shelly
AU - Levy, Avi
AU - Kacira, Murat
AU - Teitel, Meir
N1 - Funding Information: The authors thank the Chief Scientist of the Ministry of Agriculture and Rural Development of Israel (grant no. 20-12-0027 ), the BARD, The United States-Israeli Binational Agricultural Research and Development Fund (grant no. US-4885-16 ), and the Plant Production and Marketing Board of Israel (grant no. 459-4540-17 ) for their support. Publisher Copyright: © 2020 IAgrE
PY - 2020/9
Y1 - 2020/9
N2 - 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.
AB - 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.
KW - Greenhouse
KW - Organic photovoltaic
KW - Radiation
KW - Shading
KW - Tomato
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U2 - 10.1016/j.biosystemseng.2020.06.007
DO - 10.1016/j.biosystemseng.2020.06.007
M3 - Article
SN - 1537-5110
VL - 197
SP - 12
EP - 31
JO - Biosystems Engineering
JF - Biosystems Engineering
ER -