Figure 15
The horizontal axis is labeled “T subscript cell, avg [degrees Celsius]” and ranges from 10 to 60 with an interval of 10. The vertical axis is labeled “f subscript 1, 4 P [Hertz]” and ranges from 68 to 76 with an interval of 2. Four circular markers labeled in the legend as “Numerical” are plotted along a downward trend. The first point near 20 degrees Celsius is at 74 Hertz and is annotated “Ambient temperature”. The second point near 25 degrees Celsius is around 72.2 Hertz with the label “negative 2.17 percent”. The third point near 36 degrees Celsius is 70.1 Hertz with the label “negative 5.10 percent”. The fourth point near 46 degrees Celsius is about 69 Hertz with the label “negative 6.59 percent”. A straight line labeled in the legend as “Linear fit” runs diagonally downward from left to right, passing close to all four markers. Text near the lower left reads, “Point-supported Y equals 77.243 minus 0.186 times X, R-squared equals 0.969”. The markers and the fitted line form a consistent decreasing pattern as temperature increases across the horizontal axis. Note: All numerical data values are approximated.Frequency analysis for the examined point-supported BIPV floor tile under ordinary operating conditions (ABAQUS): variation of the predicted vibration frequency f1,4P (linear fit), as a function of the average temperature in the solar cells, Tcell,avg. Source: Authors’ own work