From what I understand, vertical heatpipes have a quot;wickquot; inside which means that when the liquid boils at the base of the heatpipe and then condenses at the top of the heatpipe, it's wicked back to the base of the heatpipe.
Yes it will work well. Usually wick type heat pipe used when condensation zone is below the evaporation zone. Wick use capillary action as its principle of movement, so heat pipes are often used in space application where, at zero gravity a wick has to be used. Where possible, under normal gravity, heat pipe heat exchangers (thermosyphon) should be operated with the condensation zone above the evaporation zone when the need for a wick can usually be avoided.
