Experimental study of heat transfer in double-loop plate pulsating heat pipe

To address the shortcomings of plate PHP, this paper proposes a novel PHP--double-loop plate PHP, which consists of two arched pulsating cold-end plates and one capillary hot-end plate constituting a loop, and experimental studies done on it reveal the following observations: the optimal working conditions of the double-loop plate PHP are 25% liquid filling rate, 90°tilt, edge placement, and the thermal resistance is just 0.014°C/W at 60W. Compared with the traditional plate PHP, its heat dissipation performance has been improved by 42.1%, and it has a better working ability under any tilt angle and heating mode. Therefore, the heat dissipation performance and application flexibility of double-loop plate PHP are better and more suitable for high heat flow density chips.