Experimental Study of Enhanced Pool Boiling Heat Transfer Using Graphite Foam Inserts
This paper presents the results of an experimental study of heat transfer in a pool boiling evaporator with porous insert. Different types of graphite foams were tested with the phase change coolant FC-72 in a designed thermosyphon. Comparisons between the graphite foams and a solid copper block show that the porous structure enhances pool boiling significantly. The boiling thermal resistance of the tested graphite foams was found to be about 2 times lower than that of the copper block. The bubble formation recorded by a high speed camera indicates that boiling from a graphite foam is more vigorous than from a copper block. The designed thermosyphon with graphite foam insert can remove heat fluxes of up to 112 W/cm2 with the maximum heater temperature maintained below 100°C.
Andreas Öchsner, Graeme E. Murch and João M.P.Q. Delgado
K.C. Leong et al., "Experimental Study of Enhanced Pool Boiling Heat Transfer Using Graphite Foam Inserts", Defect and Diffusion Forum, Vols. 312-315, pp. 352-357, 2011