AbstractThis study is an experimental investigation of heat transfer performance of rotating heat pipe. The experiments are performed for a rotating heat pipe and a no heat pipe. The geometry of the two pipes is the same. The test conditions of the two experiments are the same too. The temperature distributions along the evaporator and the condenser of the two pipes are measured by the platinum platinum-rhodium thermocouple. The comparison with the experimental measurements shows the temperature different between the evaporator and the condenser of rotating heat pipe is much smaller than no heat pipe.