Page 101 - rise 2017

Result and Discussion

Table II
Temperature reading for different car’s conditions
o
Temperature ( C)
Time (Minute)
With hot extractor Existing Product Without hot extractor
0 47.0 47.1 47.3
10 46.9 47.2 47.5
20 46.7 47.1 47.9
30 46.5 46.9 48.6
40 46.4 46.8 48.9
50 46.1 46.8 49.4
60 45.7 46.7 49.9

Figure 4: The graph of Temperature vs. Time for different car’s conditions

The testing was conducted with a variation of car conditions. For first part, we have examined the
temperature inside the vehicle cabin with existence of hot air extractor. While for second part, we
have done the testing without hot air extractor. While the other part, the testing was done for existing
product. This testing was done in the evening where the sunlight strikes directly to the vehicle at this
time. The car has been parked at the open area and we have fixed our product and existing product at
the same place so that we can get accurate value. For testing, we have run the test twice to obtain
more accurate result due to weather condition.
Based on the results obtained, the temperature distribution of the vehicle with the hot air
extractor is lower than the temperature distribution of the vehicle without the extractor. This can be
seen from the graph in Figure 4. Basically, the temperature in the beginning is quite high around 47°C
to 47.5°C. As the time goes, with a hot air extractor, we can see the temperature drops uniformly.
While on the other hand, when the hot air extractor is not used, the temperature kept going up and
may reached 50°C. Meanwhile, the temperature reading for existing product is decreased slowly.
Therefore we can say that our product of hot air extractor has given an effect to the temperature
reading in the vehicle cabin even with a slightly different. The difference of the temperature may not
great but it is proven that the temperature is slightly decreasing about 2°C after one hour. The
temperature increase in the car is caused by a greenhouse effect associated with a radiation imbalance
and reduced ventilation. A net radiation imbalance occurs as solar radiation can pass into the vehicle
through the windows but long-wave radiation emitted by the car is “trapped” and prevented from