140
Appendixes
(continued)
Time
Control (Mean–Ambient)
PCM non-woven material
(Mean–Ambient)
Drop in temp
0:58:00
3.07
0.54
2.53
0:58:10
3.06
0.59
2.47
0:58:20
3.06
0.55
2.51
0:58:30
3.04
0.55
2.48
0:58:40
3.04
0.52
2.53
0:58:50
3.03
0.58
2.45
0:59:00
3.01
0.58
2.43
0:59:10
3.01
0.55
2.46
0:59:20
2.99
0.54
2.45
0:59:30
2.97
0.51
2.46
0:59:40
2.98
0.48
2.50
0:59:50
2.98
0.51
2.47
1:00:00
2.98
0.51
2.47
A.2 Total Amount of Heat Absorbed by PCM Materials
The total amount of heat absorbed by PCM materials was calculated based on the
experimental results obtained from DSC graphs using the following equation:
Total amount of heat absorbed (W ) = (m × H )//t
where m is the mass of the PCM material used in the experiments, H is the
difference in the heat absorbed in J/g as shown by the DSC curves within each
temperature range and t is the calculated value of time taken for this temperature
range at a heating rate of 2 °C/min. The calculation has been explained for the case
of PCM non-woven material as shown below:
Start temperature = 20.68 °C (coloured blue in the curve)
End temperature = 28.01 °C (coloured blue in the curve) Drop in
temperature = (28.01 – 20.68) °C = 7.33 °C Rate of heating is
2 °C/min.
Hence, the time taken for this drop in temperature = 7.33 × 60/2 s = 219.9 s.
The H values as shown in the DSC curves are:
For temperature of 28.01
◦ C((H ) = 75.8737 J/g