Investigation of the performance of pulsating heat pipe subject to uniform/alternating tube diameters

Experimental investigation of the thermal management of flat-plate closed-loop pulsating heat pipes with interconnecting channels

“…The observations of conventional pulsating heat pipes show that the pressure drop is equal in both directions due to the symmetry of clockwise and counterclockwise flows [26]. In the closed-loop pulsating heat pipe, the direction of the flow is a function of the direction of bubble expansion, since the gravity force depends upon the total mass of the fluid in the channel and the channel with more fluid has more weight than the adjacent channel.…”

“…They presented an analytical model that was in agreement with what was observed in the experiments, and showed an enhancement in the heat transfer capability of the CLPHP with varying diameter. Tseng et al [26] investigated the effect of the alternating tube diameter on the performance of the CLPHP. They observed that the alternating tube diameter had a lower start-up heat input and thermal resistance compared to the CLPHP with uniform tube inner diameter.…”

A novel double pipe pulsating heat pipe design to tackle inverted heat source arrangement

“…Further elaborations of the present apparatus for the experiments can be referred to Tseng et al [10]. In this study, two PHPs having either single or double pipe configuration were fabricated and tested.…”

“…Chien et al [9] proposed a novel design of PHP having a non-uniform channel configuration which introduces additional unbalanced capillary force to startup PHPs with fewer turns subject to horizontal configuration. Tseng et al [10] extended this concept further to a typical PHP with fewer turns and the working fluids include distilled water, methanol and HFE-7100. Yang et al [11,12] also applied the concept to silicon based micro PHP to resolve the heat dissipation of high power electronics and hot spot in LEDs.…”

Effects of the evaporator and condenser length on the performance of pulsating heat pipes

“…Tseng et al [22] examined the effect of uniform and alternating diameter of tube on the performance of CLPHP. They found that the CLPHP with alternating channel design started easier and had a much smaller thermal resistance than that with uniform design for the horizontal arrangement.…”