Experimental Evaluation of the Thermal Performance of a Rotating Heat Pipe with Internal Axial Fins.

摘要

A rotating heat pipe was tested using two different copper condensers (a smooth cylinder and a cylinder with 22 straight axial fins) and water as the working fluid. The smooth condenser was tested at rotational speeds of 700, 1400 and 2800 RPM. The finned condenser was tested at 700 RPM. The heat transfer rate for each run was measured and plotted against the temperature difference between the internal vapor and the cooling water inlet. Representative condenser wall temperature profiles were plotted for each run. The primary objectives was to compare the heat transfer rates obtained. The finned condenser heat transfer rates were 30-40 percent greater than those of the smooth condenser. All data appeared to be influenced by the presence of noncondensable gases. Recommendations for improvements to the rotating heat pipe system are included.