Nucleate Pool Boiling Heat Transfer to Slush Hydrogen

Publisher Summary This chapter helps in acquiring laboratory data that concerns the nucleate pool boiling heat transfer of slush hydrogen. Slush hydrogen is a mixture of solid and liquid hydrogen showing an increased capacity to absorb heat and higher density than liquid hydrogen. The heat transfer surface is a flat disk made of copper, and three different orientations of the heat transfer surface are used. In addition to that for slush hydrogen, heat transfer data for normal boiling point liquid hydrogen, triple point liquid hydrogen, slush nitrogen, normal boiling point liquid nitrogen, and triple point liquid nitrogen is obtained. Comparison between these sets of heat transfer data and that for slush hydrogen, including the results of observation of the heat transfer surface, revealed the nucleate pool boiling heat transfer characteristics of slush hydrogen, which has hardly ever been investigated.