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Comparison of the Outdoor Performance of Cylindrical and Rectangular-Parallelepiped PV Modules
H. Noge, M. Konagai, T. Masuda, A. Satou
PV Applications and Integration
Subtopic: PV on/in Buildings, Infrastructure, Landscape, Water and Nature
Event: 36th European Photovoltaic Solar Energy Conference and Exhibition
Session: 6BV.4.18
ISBN: 3-936338-60-4
0,00 EUR
Document(s): poster


Independent power systems equipped with PV modules on the roadsides are increasing their importance for automobile IoT communication, traffic and infrastructure monitoring. Because of the limited available space, PV modules could be favorably installed in the form surrounding the electronics. In this study, we have compared the performance of cylindrical and rectangular-parallelepiped PV modules by simulation and outdoor measurements. In the simulation, the direct irradiance onto the cylindrical and rectangular sidewalls per area was calculated by considering the angle between the sun and each wall [1]. The result shows that the larger drop of the output for the rectangular module around noon is predicted compared to that for the cylindrical module. In the experiments, 6 parallel-connected flexible amorphous silicon modules and 4 CIS flat modules were combined in the forms of a cylinder and a rectangle, respectively. Their outputs were monitored by a curve tracer together with 2-axis tracking pyrheliometer and pyranometer. On Oct. 25th, 2018 under a fine weather, the scattered irradiance was 27% of the direct one in average and that led to the smaller drop of the PV output around noon than the simulation and the total outputs per day were almost the same for the both shapes of the modules when they were normalized by their efficiencies. This tendency became more significant on cloudy days with larger scattered irradiation. Consequently, the required space is π/4 = 0.785 times smaller for the rectangular module than that for the cylinder with the same peripheral length, however, the required fixing load against the wind is less than 1/3 for the cylinder due to its small wind pressure constant.