A stable liquid column-air plug system forms when liquid working fluid flows in a capillary tube that meets specific requirements for the inner diameter. In this paper

a novel two-phase heat transfer system with a pulsating heat pipe is proposed for the scenario in which a liquid-vapor two-phase working fluid in the capillary tube is driven by a peristaltic pump and one-way flow forms. The heat transfer characteristics of the system with different liquid filling ratios are investigated experimentally by a self-designed experimental setup with deionized water as the working fluid under 60 W

80 W

and 100 W conditions. The inner diameter of the capillary tube is 3 mm

and the working fluid flows in a capillary tube with a constant flow rate of 7 m/min. The experimental results show that the optimum liquid filling ratio of the heat transfer system is 20%. When the heating power is 60 W

80 W

and 100 W

the thermal resistance of the system with the optimum liquid filling ratio is 0.52 °C/W，0.38 °C/W

and 0.30 °C/W

respectively

which is reduced by 32.5%

45.7%

and 50%

respectively

compared with that of the traditional water-cooled heat transfer system.