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D inner diameter of the test section (m).
internal diameter of the test section in the wind tunnel.
L is the length of the test section.
The periphery of the test section was surrounded by insulating foam.
Several perforated walls are designed, manufactured, and installed on the top and bottom sides of the test section.
The results also show that the maximum estimated evaporative cooling system efficiency of the test section is about 45%.
And the decrease of inner diameter of the test section will be beneficial to the flow boiling heat transfer.
A modification of the test section also allows the study of freezing in pure water which is used for comparison.
The R290 mass concentration of the solution at the inlet of the test section is about 15%.
The camera was fixed at a vantage point so as to obtain an overall view of the test section.
Figure 2 presents the top view of the test section consisting of a 220 × 220 × 10 mm3 copper block.
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