Abstract
Effects of tube inclination on pool boiling heat transfer have been studied for the saturated water at atmospheric pressure. For the analysis, seven inclination angles varying from the horizontal to the vertical and two tube diameters(25.4 and 30.0 ㎜) are tested. According to the results, inclination angles result in much change on heat transfer. For the same wall superheat(about 5.3℃) the ratio between two heat fluxes for the 45° inclined and the vertical has the value of more than five when the tube diameter is 25.4㎜. As the inclination angle is increasing from the horizontal to the vertical direction heat transfer is gradually increasing because of the increase in liquid agitation. However the detailed tendency depends on the ratio between the tube length and the diameter.
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