Abstract
The influence of flow path shape on the thermal performance of ultra-thin polymer pulsating heat pipe (PPHP) was experimentally investigated. We compared the thermal performances among three types of PPHP with different flow path structure: open end flow path with a flat cross section, closed loop flow path with a flat cross section, and closed loop flow path with slope and step structures. We found that the slope and step structures realized continuous supply of the working fluid to the heating section by producing circulating flow and improved thermal performance at a higher heat load.
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