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.
Operational Temperature Ranges in Pulsating Heat Pipes
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Hansen, N, & Michna, GJ. "Operational Temperature Ranges in Pulsating Heat Pipes." Proceedings of the ASME 2012 International Mechanical Engineering Congress and Exposition. Volume 7: Fluids and Heat Transfer, Parts A, B, C, and D. Houston, Texas, USA. November 9–15, 2012. pp. 1449-1456. ASME. https://doi.org/10.1115/IMECE2012-88008
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