Research Article
Experimental Research on the Thermal Performance of Composite PCM Hollow Block Walls and Validation of Phase Transition Heat Transfer Models
Table 3
Temperature decrements, decrement factors, time lags, standard errors, and maximum absolute errors of each block wall.
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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 ranges | Experimental values | Block 1 wall | | | | | | | | Temperature range 1 | 17.5 | 4.02 | 6.17 | 0.50 | 0.28 | 0.90 | 0.54 | Temperature range 2 | 49.9 | 4.10 | 5.42 | 0.62 | 0.69 | 1.29 | 1.23 | Temperature range 3 | 51.6 | 4.07 | 5.58 | 0.60 | 0.72 | 1.14 | 1.38 | Temperature range 4 | 61.0 | 3.85 | 5.17 | 1.04 | 0.77 | 1.79 | 1.25 | Block 2 wall | | | | | | | | Temperature range 1 | 19.0 | 5.30 | 7.25 | 0.62/0.76 | 0.24/0.27 | 0.83/1.40 | 0.46/0.48 | Temperature range 2 | 51.2 | 5.43 | 6.17 | 0.36/0.33 | 0.67/0.47 | 0.72/2.64 | 1.25/0.99 | Temperature range 3 | 51.5 | 5.17 | 6.08 | 0.63/1.41 | 0.60/0.46 | 0.98/2.91 | 1.02/0.87 | Temperature range 4 | 65.4 | 5.18 | 5.92 | 0.52/1.69 | 0.70/0.63 | 1.12/3.52 | 1.34/1.46 | Temperature range 5 | 6.0 | 5.47 | 7.33 | 0.19/0.13 | 0.12/0.16 | 0.39/0.32 | 0.20/0.26 | Temperature range 6 | 10.9 | 5.65 | 6.92 | 0.24/0.39 | 0.19/0.28 | 0.54/0.76 | 0.37/0.48 | Temperature range 7 | 15.9 | 5.62 | 6.50 | 0.44/0.30 | 0.24/0.26 | 0.78/0.55 | 0.45/0.49 | Temperature range 8 | 20.7 | 5.72 | 7.25 | 0.56/0.68 | 0.31/0.37 | 1.18/1.07 | 0.55/0.62 | Block 3 wall | | | | | | | | Temperature range 1 | 19.7 | 6.82 | 7.67 | 0.09/0.13 | 0.24/0.30 | 0.19/0.28 | 0.45/0.53 | Temperature range 2 | 53.0 | 6.47 | 7.17 | 0.70/0.98 | 0.77/0.44 | 1.42/1.80 | 1.10/0.99 | Temperature range 3 | 56.2 | 6.43 | 6.83 | 0.72/0.85 | 0.70/0.50 | 1.47/1.63 | 1.24/1.05 | Temperature range 4 | 67.2 | 5.63 | 5.08 | 0.71/0.99 | 0.94/1.43 | 1.60/2.03 | 2.18/3.15 | Temperature range 5 | 20.5 | 6.61 | 6.67 | 0.40/0.44 | 0.20/0.25 | 0.66/0.71 | 0.40/0.45 | Temperature range 6 | 30.4 | 6.24 | 5.92 | 0.80/0.97 | 0.34/0.47 | 1.18/1.46 | 0.68/0.86 | Temperature range 7 | 40.3 | 6.14 | 5.5 | 0.78/1.00 | 0.47/0.66 | 1.24/1.71 | 1.01/1.21 | Temperature range 8 | 49.3 | 5.96 | 5.75 | 0.73/1.01 | 0.62/0.93 | 1.20/1.78 | 1.37/1.55 | PCM in the holes of Block 3 wall | | | | | | | | Temperature range 1 | — | — | — | 1.73/2.18 | 1.29/1.88 | 3.30/3.13 | 2.34/2.66 | Temperature range 2 | — | — | — | 2.20/2.91 | 1.58/2.25 | 4.82/4.18 | 3.43/4.52 | Temperature range 3 | — | — | — | 2.22/2.25 | 1.74/1.50 | 4.96/3.61 | 3.76/2.92 | Temperature range 4 | — | — | — | 2.57/2.89 | 2.23/2.27 | 5.30/4.25 | 4.18/5.47 | Temperature range 5 | — | — | — | 1.44/1.94 | 0.99/1.50 | 2.81/2.72 | 1.96/1.78 | Temperature range 6 | — | — | — | 1.73/2.10 | 1.04/1.57 | 3.44/3.44 | 2.25/2.10 | Temperature range 7 | — | — | — | 1.66/2.52 | 1.17/1.71 | 3.47/4.03 | 2.39/2.83 | Temperature range 8 | — | — | — | 1.73/2.74 | 1.34/1.99 | 3.74/4.50 | 2.58/3.75 | Block 4 wall | | | | | | | | Temperature range 1 | 19.3 | 5.71 | 6.33 | 0.49/0.59 | 0.25/0.32 | 1.01/1.13 | 0.45/0.72 | Temperature range 2 | 49.8 | 5.45 | 6.33 | 1.32/1.38 | 0.54/0.35 | 2.42/2.64 | 1.13/0.61 | Temperature range 3 | 56.1 | 5.96 | 6.33 | 1.31/1.26 | 0.65/0.26 | 2.50/2.50 | 1.24/0.71 | Temperature range 4 | 62.7 | 4.87 | 5.92 | 1.37/1.43 | 0.50/0.45 | 2.75/3.04 | 1.05/0.98 | Temperature range 5 | 19.9 | 5.45 | 5.83 | 0.52/0.49 | 0.22/0.40 | 0.94/0.83 | 0.34/0.69 | Temperature range 6 | 29.5 | 5.41 | 5.67 | 0.54/0.59 | 0.38/0.58 | 1.01/1.03 | 0.64/1.01 | Temperature range 7 | 34.8 | 5.10 | 5.67 | 0.62/0.72 | 0.44/0.92 | 1.17/1.25 | 0.74/1.74 | Temperature range 8 | 38.8 | 5.12 | 6.08 | 0.70/0.78 | 0.36/0.62 | 1.34/1.43 | 0.69/1.32 |
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