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Table 5.1 shows the combinations of conditions and settings under which the
experiment was conducted:
Table 5.1 Combinations of conditions and settings for steady state thermal validation
T (°C) Pressure
Heating Element
Setting
Tube Heating Setting
Low(about14°C) 4 cmH2O 45°C 0 W
Normal(about22°C) 12 cmH2O 55°C 15 W
High(about33°C) 20 cmH2O 65°C 30 W
5.3.1.1 In-chamber water temperature
After the whole system reached steady state and the ambient conditions were stable
(when using the big environmental control room for high and low ambient temperature),
water temperature was then measured by putting the thermal couple junction of the
Fluke 51 II Thermometer into the water (Figure 5.15). The temperature was measured
again after about 2.5 hours. The average of the two measurements was considered the
result of the water temperature and was used to compare with the model output.
Meanwhile, the ambient temperature and relative humidity were also measured twice.
One was measured at the beginning of the test and the other at the end of the test. The
experimental results and model outputs are shown in Figure 5.16, Figure 5.17 and
Figure 5.18 with corresponding discussions.
Figure 5.15 Measuring of airflow temperature at chamber outlet
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