NICOP - Heat transfer studies of a pulsating heat pipe using high speed infrared thermometry
Abstract
A pulsating heat pipe (PHP) is a promising candidate for microelectronics cooling owingto their simple design and high performance. Proper physics-based understanding of the heattransfer mechanism of PHPs is vital in order to provide the design guideline of high" performancePHPs. However, the heat transport mechanism of PHPs has not been fully understood. Someresearchers have claimed that h""eat is mainly transported by sensible heat transfer due to the flowoscillation, while others have claimed that latent heat transfer"" is a dominant part, or thecontributions of sensible/latent heat largely depend on the heat flux level. In order to clear theheat"" transfer mechanism of PHPs out, quantitative measurements of sensible/latent heat in PHPsis required, which has not been conducted"" due to the difficulty of acquiring surface heat flux atthe evaporator and condenser.In this study, experimental measurements of h"eat transfer rate at the evaporator/condenserwill be conducted in conjunction with flow visualization in order to quantify the contributions ofsensible/latent heat in PHPs. A silicon-based PHP which is transparent to visible light as well asinfrared will be dev"eloped. Using synchronized imaging of infrared (IR) thermometry and highspeed photography, the heat transfer mechanism of PHPs will" be clarified. The proposed workhas the potential to achieve high performance PHPs.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Dec 20, 2017
- Source ID
- N629091812028
Entities
People
- Sung Kim
Organizations
- KAIST
- Office of Naval Research
- United States Navy