Figure 9
Panel A represents wall error. The horizontal axis, Time in months, uses a logarithmic scale from about 10 to the power of minus 4 to 10 to the power of 2. The vertical axis, wall phi error, ranges from 0.00 to 0.25. Mean absolute error remains near 0 until about 10 to the power of minus 3 months, then rises steadily to about 0.12. Root mean squared error follows a higher curve and reaches about 0.14. Panel B represents outlet error over the same time scale and vertical range. Mean absolute error rises unevenly from near 0 to about 0.04 at approximately 10 to the power of minus 4 months, then increases gradually to about 0.16. Root mean squared error rises to about 0.08, briefly falls near 10 to the power of minus 3 months, and then increases to about 0.20.Variation of MAE and RMSE with time for (a) wall and (b) outlet temperatures