The gravity heat pipe has the advantages of excellent heat transfer performances

simple structure

easy manufacturing and reliable operation.In this paper

the working principle and development process of the gravity heat pipe was introduced and the research progress of heat transfer enhancement of the gravity heat pipe was summarized

from the aspects of operating conditions

structure optimization and efficient working medium fluid selection.The effects of filling ratio

angle selection

plug-in form and nanofluids on heat transfer performance of the gravity heat pipe were summed up.Moreover

suggestion that multiple factors affecting heat transfer performance of the gravity heat pipe should be considered comprehensively was proposed.