The pulsating heat pipe (PHP), due to its ability to dissipate large amounts of heat and reduce temperature nonuniformity, is a promising technology for electronics cooling applications. In this work, the effect of the direction of change of heat dissipation rate in a PHP was explored. A quasi-steady state was approached by either increasing or reducing the evaporator heat input rate to a given level. It was found that instead of reaching a single steady-state evaporator temperature for a given heat input and condenser temperature, there is a range within which the evaporator temperature will fluctuate. Since most electronics cooling applications will have a non-steady heat removal requirement, understanding this phenomenon is of great importance for the design of PHP heat sinks.

This content is only available via PDF.
You do not currently have access to this content.