106
4 Results and Discussion
0
1
2
3
4
5
PCM nonwoven
PCM foam
PCM fabric PCM composite
Maximum drop in temp. Deg C
Types of PCM materials
Fig. 4.30 Comparison graph of different PCM materials at 55 kph speed
Table 4.3 Drop in temperature achieved by various PCM materials at 55 kph speed
Materials
Corresponding time
of MDIT a
(h:mm:ss)
Control ‘A’
(Mean–Ambient)
(°C)
Material ‘B’
(Mean–Ambient)
(°C)
MDIT a (B–A)
(°C)
PCM
Non-woven
0:30:40
6.2
3.1
– 3.1
PCM foam
0:25:30
6.8
3.1
– 3.6
PCM fabric
0:30:40
6.2
2.5
– 3.7
PCM
Composite
0:26:20
6.5
2.9
– 3.6
a Maximum drop in temperature
Drop in temp. Deg.C
Time:h:mm:ss
0:00:00
0:07:12
0:14:24
0:21:36
0:28:48
0:36:00
0:43:12
0:50:24
0:57:36
1:04:48
0.0
-1.0
Drop in temp. for PCM nonwoven material
Drop in temp. for PCM foam material
Drop in temp. for PCM fabric material
Drop in temp. for PCM composite material
-2.0
-3.0
-4.0
-5.0
Fig. 4.31 Comparison of cooling curves for PCM materials at 55 kph speed