Comparative thermal performance evaluation between ultrathin flat plate pulsating heat pipe and graphite sheet for mobile electronic devices at various operating conditions

Dong Soo Jang, Dongwoo Kim, Seong Ho Hong, Yong Chan Kim

Research output: Contribution to journalArticle

Abstract

The objective of this study is to evaluate the thermal performance improvement of an ultrathin, flat plate pulsating heat pipe (PHP) against a graphite sheet for use in mobile electronic devices. Initially, the thermal performances of five PHP models with various channel designs are quantified, and an optimum PHP is selected to achieve the best performance. In the optimum PHP, the thermal performance is analyzed as a function of the heat input and condenser temperature. Finally, the finished product of the flat plate PHP is fabricated using a diffusion bonding technique. The thermal performance of the finished flat plate PHP is then compared with that of the graphite sheet based on conducted tests at the inclination angles of 90° 0° and −90°. The thermal resistances of the finished flat plate PHP at the inclination angles of 90° and 0° are 63% and 56%, respectively, lower than those of the graphite sheet, whereas the resistance at the inclination angle of −90° is almost the same as that of the graphite sheet.

Original languageEnglish
Pages (from-to)1427-1434
Number of pages8
JournalApplied Thermal Engineering
Volume149
DOIs
Publication statusPublished - 2019 Feb 25

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Heat pipes
Graphite
Diffusion bonding
Hot Temperature
Heat resistance

Keywords

  • Flat plate pulsating heat pipe
  • Graphite sheet
  • Thermal performance

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Industrial and Manufacturing Engineering

Cite this

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title = "Comparative thermal performance evaluation between ultrathin flat plate pulsating heat pipe and graphite sheet for mobile electronic devices at various operating conditions",
abstract = "The objective of this study is to evaluate the thermal performance improvement of an ultrathin, flat plate pulsating heat pipe (PHP) against a graphite sheet for use in mobile electronic devices. Initially, the thermal performances of five PHP models with various channel designs are quantified, and an optimum PHP is selected to achieve the best performance. In the optimum PHP, the thermal performance is analyzed as a function of the heat input and condenser temperature. Finally, the finished product of the flat plate PHP is fabricated using a diffusion bonding technique. The thermal performance of the finished flat plate PHP is then compared with that of the graphite sheet based on conducted tests at the inclination angles of 90° 0° and −90°. The thermal resistances of the finished flat plate PHP at the inclination angles of 90° and 0° are 63{\%} and 56{\%}, respectively, lower than those of the graphite sheet, whereas the resistance at the inclination angle of −90° is almost the same as that of the graphite sheet.",
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AU - Kim, Yong Chan

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