EU PVSEC Programme Online
EU PVSEC 2021, 6 - 10 September 2021
Presentation: 5CV.3.11 Experimental Evaluation of Performance Enhancement in a Bifacial PV System by a Highly Reflective Textile Ground Cover
Type: Visual
Date: Wednesday, 8th September 2021
15:15 - 16:45
Author(s): J.D. Moschner, G.H. Yordanov, L. Dupé
Presenter / Speaker: G.H. Yordanov, KU Leuven, Leuven, Belgium
Event: Conference Conference
Session: 5CV.3 PV Systems: Planning, Plant Optimisation Tools, Advanced Installation Criteria, Construction Issues / Concentrators and PV for S
Topic: 5. 2 Design and Installation of PV Systems
Keywords: PV System, Bifacial, Energy Performance, Optical Properties, Albedo, Reflectors
Summary / Abstract: We have investigated the efficacy of a highly reflective ground cover as a reflector in combination with bifacial PV modules, using a white polymer fabric that has originally been developed for horticultural applications. This study provides an initial assessment of the potential advantage in energy yield, before testing the material on a larger scale. To test the attainable bifacial gain, we installed three identical PV modules on a south-facing rack with different undergrounds and backgrounds: the roof environment as-is, lawn grass, and Magnifield woven textile. In a first test phase, the modules were operated as solitary units in the middle of separate rack segments. In a second phase, they were surrounded by black textile covers, to simulate a realistic shading setting as it would be in a larger installation. We found that the white textile Magnifield provides a strong boost of bifacial gain relative to grass, obtaining an additional 16% in energy yield with solitary modules and 10% in a realistic rack configuration. Use of this white reflective woven textile material can aid substantially in enhancing performance and reducing kWh costs in ground-mounted PV systems of any size.