Study of a single, straight tube pulsating heat pipe (oscillation behavior and heat transport characteristics)

Kunito Okuyama, Satoshi Kamidozono, Jun Iyeshima, Shunske Kato, Shoji Mori

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Oscillation behavior and heat transport characteristics in a pulsating heat pipe consisting of a single and straight tube with an open end are investigated experimentally. Periodic oscillation of a vapor plug with a large stroke over two thirds of the heat transport tube length is excited for heating powers larger than 20 W at horizontal orientation and continues for a long period over 8,000s without cease. Heat transport rate and the effective thermal conductivity increase with heating power up to approximately 75 W and 40 kW/(m·K), respectively. Heating section, which has an inner diameter little larger than that of the heat transport section, is maintained at almost the saturation temperature of the working liquid throughout the succession of oscillation. Liquid film beneath the vapor plug is partially pushed back to the heating section to spread on the wick each time the vapor plug shrinks. The small step at the tube connection between the heating section and the heat transport tube section and the wick inside the heating section are shown to be essential structures for realizing the stable oscillation leading to high heat transport characteristics.

Original languageEnglish
Pages (from-to)881-893
Number of pages13
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume78
Issue number788
DOIs
Publication statusPublished - Jun 15 2012

Fingerprint

heat pipes
Heat pipes
tubes
Heating
heat
oscillations
heating
plugs
wicks
Vapors
vapors
horizontal orientation
stable oscillations
Liquid films
liquids
strokes
Hot Temperature
Thermal conductivity
thermal conductivity
saturation

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

Study of a single, straight tube pulsating heat pipe (oscillation behavior and heat transport characteristics). / Okuyama, Kunito; Kamidozono, Satoshi; Iyeshima, Jun; Kato, Shunske; Mori, Shoji.

In: Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, Vol. 78, No. 788, 15.06.2012, p. 881-893.

Research output: Contribution to journalArticle

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