Development of a high-performance boiling heat exchanger by improved liquid supply to narrow channels

Haruhiko Ohta, Toshiyuki Ohno, Fumiaki Hioki, Yasuhisa Shinmoto

研究成果: ジャーナルへの寄稿記事

抄録

A two-phase flow loop is a promising method for application to thermal management systems for large-scale space platforms handling large amounts of energy. Boiling heat transfer reduces the size and weight of cold plates. The transportation of latent heat reduces the mass flow rate of working fluid and pump power. To develop compact heat exchangers for the removal of waste heat from electronic devices with high heat generation density, experiments on a method to increase the critical heat flux for a narrow heated channel between parallel heated and unheated plates were conducted. Fine grooves are machined on the heating surface in a transverse direction to the flow and liquid is supplied underneath flattened bubbles by the capillary pressure difference from auxiliary liquid channels separated by porous metal plates from the main heated channel. The critical heat flux values for the present heated channel structure are more than twice those for a flat surface at gap sizes 2 mm and 0.7 mm. The validity of the present structure with auxiliary liquid channels is confirmed by experiments in which the liquid supply to the grooves is interrupted. The increment in the critical heat flux compared to those for a flat surface takes a maximum value at a certain flow rate of liquid supply to the heated channel. The increment is expected to become larger when the length of the heated channel is increased and/or the gravity level is reduced.

元の言語英語
ページ(範囲)217-234
ページ数18
ジャーナルAnnals of the New York Academy of Sciences
1027
DOI
出版物ステータス出版済み - 1 1 2004

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Boiling liquids
Heat exchangers
Hot Temperature
Liquids
Heat flux
Flow rate
Space platforms
Plate metal
Capillarity
Latent heat
Waste heat
Heat generation
Bubbles (in fluids)
Temperature control
Electronic Waste
Two phase flow
Gravitation
Hypergravity
Experiments
Heat

All Science Journal Classification (ASJC) codes

  • Neuroscience(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • History and Philosophy of Science

これを引用

Development of a high-performance boiling heat exchanger by improved liquid supply to narrow channels. / Ohta, Haruhiko; Ohno, Toshiyuki; Hioki, Fumiaki; Shinmoto, Yasuhisa.

:: Annals of the New York Academy of Sciences, 巻 1027, 01.01.2004, p. 217-234.

研究成果: ジャーナルへの寄稿記事

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