Effect of heater orientation on pool boiling heat transfer from sintered copper microporous coating in saturated water

However, it is noted that the CHF value of the HTCMC at 180° is ∼4.5 times higher than that of plain copper surface (0.3 MW/m2 at 180°). HTCMC also shows a noticeably higher CHF value at 180° compared to nanocoating or other enhanced surfaces. This significant CHF enhancement is believed to be due to a large number of small feed jet bubbles created from porous structures, postponing the dryout caused by forming large bubbles on the heated surface.