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Experiments on Influence of Gravity to Heat Transfer Efficiency in Micro Tube Condenser

This study experimentally investigated the influence of the gravity to the condensation heat transfer of steam in a micro tube condenser with the internal diameter of 0.8 mm. The design capacity of this condenser is 700 W. From the experimental results, the actual capacity of the condenser is the same with the design capacity. In the range of steam from 0.08 to 0.27 g/s, the heat transfer efficiency of the horizontal case is higher than that obtained from the vertical case. However, the difference is not strong. In this study, the maximum heat transfer rate in the horizontal condenser is 673.1 W and the maximum heat transfer coefficient of the horizontal case is 1601.9 W/m2. K. This experiment added the results on the gravity, the heat transfer rate, and the heat transfer coefficient in the field of micro tube condensation.