Table 3: Temperature decrements, decrement factors, time lags, standard errors, and maximum absolute errors of each block wall.

Indexes Temperature decrements (°C) Decrement factors Time lags (h)Standard errors (°C)Maximum absolute errors (°C)
Left surface
Eff/Ent
Right surface
Eff/Ent
Left surface
Eff/Ent
Right surface
Eff/Ent

Block walls and temperature rangesExperimental values
Block 1 wall
 Temperature range 117.54.026.170.500.280.900.54
 Temperature range 249.94.105.420.620.691.291.23
 Temperature range 351.64.075.580.600.721.141.38
 Temperature range 461.03.855.171.040.771.791.25
Block 2 wall
 Temperature range 119.05.307.250.62/0.760.24/0.270.83/1.400.46/0.48
 Temperature range 251.25.436.170.36/0.330.67/0.470.72/2.641.25/0.99
 Temperature range 351.55.176.080.63/1.410.60/0.460.98/2.911.02/0.87
 Temperature range 465.45.185.920.52/1.690.70/0.631.12/3.521.34/1.46
 Temperature range 56.05.477.330.19/0.130.12/0.160.39/0.320.20/0.26
 Temperature range 610.95.656.920.24/0.390.19/0.280.54/0.760.37/0.48
 Temperature range 715.95.626.500.44/0.300.24/0.260.78/0.550.45/0.49
 Temperature range 820.75.727.250.56/0.680.31/0.371.18/1.070.55/0.62
Block 3 wall
 Temperature range 119.76.827.670.09/0.130.24/0.300.19/0.280.45/0.53
 Temperature range 253.06.477.170.70/0.980.77/0.441.42/1.801.10/0.99
 Temperature range 356.26.436.830.72/0.850.70/0.501.47/1.631.24/1.05
 Temperature range 467.25.635.080.71/0.990.94/1.431.60/2.032.18/3.15
 Temperature range 520.56.616.670.40/0.440.20/0.250.66/0.710.40/0.45
 Temperature range 630.46.245.920.80/0.970.34/0.471.18/1.460.68/0.86
 Temperature range 740.36.145.50.78/1.000.47/0.661.24/1.711.01/1.21
 Temperature range 849.35.965.750.73/1.010.62/0.931.20/1.781.37/1.55
PCM in the holes of Block 3 wall
 Temperature range 11.73/2.181.29/1.883.30/3.132.34/2.66
 Temperature range 22.20/2.911.58/2.254.82/4.183.43/4.52
 Temperature range 32.22/2.251.74/1.504.96/3.613.76/2.92
 Temperature range 42.57/2.892.23/2.275.30/4.254.18/5.47
 Temperature range 51.44/1.940.99/1.502.81/2.721.96/1.78
 Temperature range 61.73/2.101.04/1.573.44/3.442.25/2.10
 Temperature range 71.66/2.521.17/1.713.47/4.032.39/2.83
 Temperature range 81.73/2.741.34/1.993.74/4.502.58/3.75
Block 4 wall
 Temperature range 119.35.716.330.49/0.590.25/0.321.01/1.130.45/0.72
 Temperature range 249.85.456.331.32/1.380.54/0.352.42/2.641.13/0.61
 Temperature range 356.15.966.331.31/1.260.65/0.262.50/2.501.24/0.71
 Temperature range 462.74.875.921.37/1.430.50/0.452.75/3.041.05/0.98
 Temperature range 519.95.455.830.52/0.490.22/0.400.94/0.830.34/0.69
 Temperature range 629.55.415.670.54/0.590.38/0.581.01/1.030.64/1.01
 Temperature range 734.85.105.670.62/0.720.44/0.921.17/1.250.74/1.74
 Temperature range 838.85.126.080.70/0.780.36/0.621.34/1.430.69/1.32