Performances of Flat Plate Pulsating Heat Pipes Available to Purchase

Flat plate pulsating heat pipe is useful for hot spot heat spreader. Two kinds of flat plate spreader of pulsating heat pipe are designed, fabricated and experimented. For the embedded circular capillary type, the transferred heat flux could reach 32W/cm², the smallest thermal resistance for acetone, methanol and FC-72 were respectively 0.50, 0.57 and 0.40°C/W. While for the square capillary type, the transferred heat flux could reach 26W/cm², the equivalent thermal conductivity could reach 3211W/(m. °C). There are ranges of optimal transferred power and filling ratio for different working liquid. If the transferred power is constant, changing the heating area and the place has little effects on the performance.