The effect of vegetation on solar PV panel efficiency was tested in a commercial solar farm in the Negev Desert of Israel. Panel temperature of mono-facial modules in two test sites of 0.22 hectares each with different plant treatments was up to 3.5°C lower at midday compared to the panel temperature in an adjacent reference plot with bare loess soil. The temperature difference was not uniform, being greatest for the upper panels in a ground-mounted array (average reduction 2.2°C), and lowest for panels closest to the ground (1.0°C reduction). The temperature reduction is attributed primarily to smaller fluxes of solar radiation reflected from the plants, which have a lower albedo than the bare soil, and to less infrared radiation emitted from the plants, which are cooler. A small reduction in air temperature due to evapotranspiration also contributed to this outcome. Electricity production measured in the test plots was approximately 1% higher over the summer test period. The Land Equivalent Ratio (LER) of the test plots was 1.67, reflecting the combined contribution of the increased electricity production, the value of the crops, and the reduction in site maintenance costs.
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6 December 2022
AGRIVOLTAICS2021 CONFERENCE: Connecting Agrivoltaics Worldwide
14–16 June 2021
Freiburg, Germany
Research Article|
December 06 2022
Improvement of electrical efficiency in a PV solar farm utilizing agriculture
Julian Leaf;
Julian Leaf
a)
1
Geo Teva Environmental Consultants Ltd
. Omarim 9, Omer, 9496500, Israel
a)corresponding author: leaf.julian@gmail.com
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Yuval Kaye;
Yuval Kaye
b)
2
Ramat Negev Agricultural Research Center
, D.N. Halutza, 8551500, Israel
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Liran Ben-Altabet;
Liran Ben-Altabet
1
Geo Teva Environmental Consultants Ltd
. Omarim 9, Omer, 9496500, Israel
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Annette Penny;
Annette Penny
1
Geo Teva Environmental Consultants Ltd
. Omarim 9, Omer, 9496500, Israel
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David Meninger;
David Meninger
c)
1
Geo Teva Environmental Consultants Ltd
. Omarim 9, Omer, 9496500, Israel
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Evyatar Erell
Evyatar Erell
d)
3
Department of Geography and Environmental Development, Ben Gurion University of the Negev
, Be'er Sheva, 84105, Israel
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a)corresponding author: leaf.julian@gmail.com
AIP Conf. Proc. 2635, 070001 (2022)
Citation
Julian Leaf, Yuval Kaye, Liran Ben-Altabet, Annette Penny, David Meninger, Evyatar Erell; Improvement of electrical efficiency in a PV solar farm utilizing agriculture. AIP Conf. Proc. 6 December 2022; 2635 (1): 070001. https://doi.org/10.1063/5.0105646
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