• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Mechanisms and characteristics of micro-layer configuration in phase change heat transfer between liquid and vapor

Research Project

Project/Area Number 17360096
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Thermal engineering
Research InstitutionYokohama National University

Principal Investigator

UTAKA Yoshio  Yokohama National University, Div of Systems Research, Professor (50114856)

Co-Investigator(Kenkyū-buntansha) MATSUMOTO Hiroaki  Yokohama National Univ., Div. of Systems Research, Associate Professor (10251753)
DAITOKU Tadafumi  Yokohama National Univ., Div of Systems Research, Research Associate (40452049)
Project Period (FY) 2005 – 2007
Project Status Completed (Fiscal Year 2007)
Budget Amount *help
¥15,910,000 (Direct Cost: ¥15,100,000、Indirect Cost: ¥810,000)
Fiscal Year 2007: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2006: ¥6,500,000 (Direct Cost: ¥6,500,000)
Fiscal Year 2005: ¥5,900,000 (Direct Cost: ¥5,900,000)
Keywordsheat transfer / phase change heat transfer / boiling / mini-channel / nucleate boiling / micro-layer / laser extinction method / 熱電熱
Research Abstract

To elucidate the mechanism and characteristics of boiling heat transfer in a narrow gap micro-channel vaporizer, the experimental investigation concerning the micro-layer thickness that formed between the heating surface and vapor generated was performed. The micro-layer thickness was measured applying the laser extinction method for the channel gap sizes of 0.5, 0.3 and 0.15 mm. The configuration of thin liquid micro-layer distributions on the surface was clarified. The gap size, the rate of bubble growth and the distance from the incipient bubble site have an effect on the micro-layer thickness. The initial micro-layer thickness increased with increase of the velocity of bubble forefront to moderate value of the velocity. In the region of larger velocity, the thickness was constant for each gap. The distributions of the initial thickness of micro-layer on the surface were shown. Furthermore, the mechanism and characteristics of heat transfer was investigated quantitatively by analyzi … More ng the affecting factors such as the position of vapor bubble generated, the velocity of vapor forefront, the periods of the micro-layer dominant and the liquid saturation in a boiling cycle and so forth.
The configuration of micro-layer formed under growing bubble in nucleate pool boiling was investigated. Micro-layer thickness was measured by specially devised measuring system applying the laser extinction method. The thickness of the initially formed micro-layer was decided uniquely. Furthermore, the study is carried out to elucidate the contribution of micro-layer on heat transfer on the basis of the measurement of configuration of micro-layer. The dominant factors determining the characteristics of micro-layer such as micro-layer thickness distribution, duration of micro-layer existence, the size of micro-layer area and so-forth were expressed by non-dimensional form on the basis of the similarity of bubble growth rate. Finally, the contribution of the evaporation from the micro-layer in nucleate boiling was shown. Less

Report

(4 results)
  • 2007 Annual Research Report   Final Research Report Summary
  • 2006 Annual Research Report
  • 2005 Annual Research Report
  • Research Products

    (21 results)

All 2007 2006 2005 Other

All Journal Article (16 results) (of which Peer Reviewed: 5 results) Presentation (5 results)

  • [Journal Article] 狭隘間隙ミニチャネル沸騰系における薄液膜構造と伝熱特性2007

    • Author(s)
      宇高義郎
    • Journal Title

      日本機械学会論文集(B編) 73

      Pages: 1929-1935

    • NAID

      110006402885

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Annual Research Report 2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Behavior of Micro-layer in Micro-channel Boiling System Applying Laser Extinction Method2006

    • Author(s)
      Utaka
    • Journal Title

      Heat Transfer-Asian Research Vol.35, No.1

      Pages: 35-46

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Effects of Surface Properties and Gap Sizes on Boiling Heat Transfer Characteristics in a Micro-Channel Vapor Generator2006

    • Author(s)
      Tasaki, Y.
    • Journal Title

      J. of Enhanced Heat Transfer Vol.13, Issue3

      Pages: 245-260

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Effects of Surface Properties and Gap Sizes on Boiling Heat Transfer Characteristics in a Micro-Channel Vapor Generator2006

    • Author(s)
      Tasaki, Y., Utaka, Y
    • Journal Title

      J. of Enhanced Heat Transfer Vol.13

      Pages: 245-260

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Behavior of Micro-layer in Micro-channel Boiling System Applying Laser Extinction Method2006

    • Author(s)
      Utaka, Y. Tasaki, Y., Okuda, S
    • Journal Title

      Heat Transfer-Asian Research Vol.35, 1

      Pages: 35-46

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Behavior of Micro-layer in Micro-channel Boiling System Applying Laser Extinction Method2006

    • Author(s)
      Utaka, Y.
    • Journal Title

      Heat Transfer - Asian Research 35

      Pages: 35-46

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effects of Surface Properties and Gap Sizes on Boiling Heat Transfer Characteristics in a Micro-Channel Vapor Generator2006

    • Author(s)
      Tasaki, Y., Utaka, Y.
    • Journal Title

      J. Enhance Heat Transfer, Vol.13, Issu 3

      Pages: 245-260

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Configuration of Micro-Layer in Thin-Gaps in Boiling Heat Transfer2006

    • Author(s)
      Utaka, Y., Okuda, S., Tasaki, Y.
    • Journal Title

      Proc. of 13th Int. Heat Transfer Conference BOI-10

    • Related Report
      2006 Annual Research Report
  • [Journal Article] (1) Characteristics of Micro-Liquid-Layer Behavior in a Mini-Channel Vaporizer for Water and Ethanol2006

    • Author(s)
      Utaka, Y., Tasaki, Y., Ichii, K.
    • Journal Title

      Proc. of Fourth Int. Conf. on Nanochannels, Microchannels and Minichannels ICNMM200 6-96128

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Behavior of Micro-layer in Micro-channel Boiling System Applying Laser Extinction Method2006

    • Author(s)
      Utaka, Y., Tasaki, Y., Okuda, S.
    • Journal Title

      Heat Transfer-Asian Research Vol.35,No.1

      Pages: 35-46

    • Related Report
      2005 Annual Research Report
  • [Journal Article] レーザー消光法によるマイクロチャネル沸騰系における薄液膜挙動の観測2005

    • Author(s)
      宇高義郎
    • Journal Title

      日本機械学会論文集(B編) 71巻704号

      Pages: 1133-1139

    • NAID

      110005051513

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Behaviours of Micro-Layer in Micro-channel Boiling System Applying Laser Extinction Method2005

    • Author(s)
      Utaka, Y., Tasaki, Y., Okuda, S
    • Journal Title

      Transaction of Japan Society of Mechanical Engineers Vol.71

      Pages: 1133-1139

    • NAID

      110005051513

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] レーザー消光法によるマイクロチャネル沸騰系における薄膜挙動の観測2005

    • Author(s)
      宇高義郎, 田崎豊, 奥田修平
    • Journal Title

      日本機械学会論文集(B編) 71巻704号

      Pages: 1133-1139

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Structure of Microlayer and Heat Transfer Characteristics in Mini-Channel Vapor Generator2005

    • Author(s)
      Utaka, Y., Tasaki, T., Okuda, S.
    • Journal Title

      Thermal Science and Engineering Vol.13,No.4

      Pages: 65-66

    • NAID

      10019038408

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Configuration of Micro-Layer in Boiling in Narrow Gaps for Water2005

    • Author(s)
      Utaka, K., Tasaki, Y., Okuda, S.
    • Journal Title

      16^<th> Int.Symp.On Transport Phenomena

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Structure of Micro-Layer and Characteristics of Boiling Heat Transfer in Narrow Gap Mini-Channel System

    • Author(s)
      Utaka, Y., Okuda, S., Tasaki, Y
    • Journal Title

      Transaction of Japan Society of Mechanical Engineers Vol.73

      Pages: 1929-1935

    • NAID

      110006402885

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Configuration of Micro-Layer in Thin-Gaps in Boiling Heat Tran sfer2006

    • Author(s)
      Utaka, Y.
    • Organizer
      13th Int. Heat Transfer Conference
    • Place of Presentation
      Sydney, Australia
    • Year and Date
      2006-08-14
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Configuration of Micro-Layer in Thin-Gaps in Boiling Heat Transfer2006

    • Author(s)
      Utaka, Y., Okuda, S., Tasaki, Y
    • Organizer
      13th Int. Heat Transfer Conference
    • Place of Presentation
      Sydney, Australia
    • Year and Date
      2006-08-14
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Annual Research Report 2007 Final Research Report Summary
  • [Presentation] Characteristics of Micro-Liquid-Layer Behavior in a Mini-Channel Vaporizer for Water and Ethanol2006

    • Author(s)
      Utaka, Y.
    • Organizer
      Proc. of Fourth Int. Conf. on Nanochannels, Microchannels and Minichannels
    • Place of Presentation
      Ireland
    • Year and Date
      2006-06-21
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Characteristics of Micro-Liquid-Layer Behavior in a Mini-Channel Vaporizer for Water and Ethanol2006

    • Author(s)
      Utaka, Y., Tasaki, Y., Ichii, K
    • Organizer
      Fourth Int. Conf. on Nanochannels, Microchannels and Minichannels
    • Place of Presentation
      Ireland
    • Year and Date
      2006-06-21
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Configuration of Micro-Layer in Boiling in Narrow Gaps for Water2005

    • Author(s)
      Utaka, Y.
    • Organizer
      16th Int. Symp. On Transport Phenomena
    • Place of Presentation
      Prague, Chech
    • Year and Date
      2005-08-30
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary

URL: 

Published: 2005-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi