Abstract
The definition of the fill factor (FF) and a more accurate formula were used to study the temperature dependency of FF. To investigate FF changes as a function of the temperature in the photovoltaic (PV) modules, we used an equivalent circuit diagram that considers series and parallel resistances. Using a measurement setup that allows precise temperature control of the PV modules, the parameters Voc, Isc, Vm, Im were measured between 6 and 40 °C. Using the theoretical model, a formula for the FF temperature gradient, ∂FF/∂t, could be found. The experimental results show that FF decreases with increasing temperature, and fitting the obtained data points results in a straight line. The FF has a negative temperature coefficient. Specifically, the obtained “defined value” for ∂FF/∂t is −0.00093 1/°C, while the theoretical value is −0.0015 1/°C.
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Recommended by Associate Editor Joon Hyoung Shim
Hongwei Qu obtained his B.Sc. in 2006 from Northeast Petroleum University, his M.Sc. in 2011 from Northeast Electric Power University, and start working on a doctorate in 2015 from Northeast Electric Power University. His main research interests include solar cell efficiency and dependency.
Xingcan Li received his B.Sc. degree in 2008 from Northeast Electric Power University, received his M.Sc. degree in 2012 from Northeast Electric Power University, received his Ph.D. degree in 2017 from Harbin Institute of Technology. He is a Associate Professor in Northeast Electric Power University. His main research interest is fouling and counter measures of heat-exchanger equipment and solar energy technology.
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Qu, H., Li, X. Temperature dependency of the fill factor in PV modules between 6 and 40 °C. J Mech Sci Technol 33, 1981–1986 (2019). https://doi.org/10.1007/s12206-019-0348-4
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DOI: https://doi.org/10.1007/s12206-019-0348-4