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1997 Fiscal Year Final Research Report Summary

Development of Cold Energy Transport System Unilizing Ice/Water Mixture for District Cooling

Research Project

Project/Area Number 07555070
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section展開研究
Research Field Thermal engineering
Research InstitutionNagaoka University of Technology

Principal Investigator

HATTORI Masaru  Nagaoka University of Technology, President, 学長 (70016426)

Co-Investigator(Kenkyū-buntansha) KAWADA Yoshitaka  Nagaoka College of Technology, Department of Mechanical Enginnering, Assistant, 機械工学科, 助手 (50177705)
KOSUGI Sanai  Sumitomo Metal Industries, Ltd., Constrution & Thermal Plant Div., General Manag, 建設・エネルギー事業部, 専任部長(研究職)
YOSHIDA Kaki  Ebara Corporation, Environmental Engineering Group, General Manager, エンジニアリング事業本部, 部長(研究職)
OGAWA Yasuo  Ebara Research Co, Ltd., Center for Technology Development, Director, 技術開発研究所, 理事(研究職)
SHIRAKASHI Masataka  Nagaoka University of Technology, Faculty of Enginnering, Professor, 工学部, 教授 (60115110)
Project Period (FY) 1995 – 1997
KeywordsDistrict Cooling / Cold Energy Transport / Ice / Water Mixture Flow / Pressure Drop / Ice Fraction Control / Blockage / Heat Exchanger / Heat Transfer Characteristics
Research Abstract

1. The ice/water mixture transportation system was designed taking social conditions such as the electric charge system into consideration.
2. The characteristics of ice/water mixture through pipes were investigated. Effects of pipe diameter, pipe material and particle size on the pressure drop through a straight pipe were clarified, and a method to predict the pressure drop was proposed taking these factors into consideration. The energy loss and ice distribution characteristics in branching pipes were clarified experimentally. Compressive yield stress of an ice-particle cluster in water was measured. The yield stress thus obtained was shown to correspond with the adhesive property of particles to form clusters in a pipe flow.
3. A device was developed to control the flow rate and the ice fraction in a pipe branching from the main transportation pipe. This device was confirmed to work successfully irrespective of the flow condition in the main pipe.
4. Blockage at a vertical downward pipe connected to a horizontal pipe with an elbow and an ice fraction regulator wsa investigated. The compressed-plug type blockage occurred at the latter when the ice concentration ratio exceeded a critical value which depended on particle shape/size.
5. A storage tank was made on a trial basis. Tests on the performance of the device to take out ice to the main pipe were carried out to obtain data for further improvement.
6. Heat transfer characteristics of ice/water mixture flow in the double piped heat exchanger was investigated. Relationship between heat transfer coefficient and velocity or ice fraction was clarified.
7. An ice-water direct contact heat exchanger was contrived and heat transfer characteristics between ice and water in the heat exchanger were studied. Effects of velocity on the heat transfer coefficient and amount of ice necessary to attain a desired heat exchange rate were clarified.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] 白樫 正高: "氷水二相流の管摩擦損失" 日本機械学会論文集. 61・585. 1632-1639 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 河田 剛毅: "分岐管における氷水二相流の流動特性と氷分率制御" 日本氷雪学会誌 雪氷. 58・5. 405-415 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 河田 剛毅: "氷-水直接接触法における熱伝達特性に関する研究" 第33回日本伝熱シンポジウム講演論文集. Vol.III. 665-666 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 川村 与志夫: "氷水混相流の閉塞現象に関する研究" 混相流シンポジウム'97(第16回)講演論文集. 85-86 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 川村 与志夫: "氷水混相流による冷熱輸送のための機器の開発" 混相流シンポジウム'97(第16回)講演論文集. 87-88 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 河田 剛毅: "氷粒群と水の間の伝熱特性に関する研究" 混相流シンポジウム'97(第16回)講演論文集. 93-94 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Masataka Shirakashi: "Characteristics of Ice/Water Mixture Flow in Horizontal Circular Pipes" Transactions of the Japan Society of Mechanical Engineers. 61-585. 1632-1639 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yoshitaka Kawada: "Characteristics of Ice/Water Mixture Flow in a Branching Pipe and Development of an Ice Fraction Control Technique" Journal of the Japanese Society of Snow and Ice, Seppyo. 58-5. 405-415 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yoshitaka Kawada: "Heat Transfer Characteristics of Ice-Water Direct Contact Heat Exchanger" 33rd National Heat Transfer Symposium of Japan. Vol.III. 665-666 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yoshio Kawamura: "Blokage of Ice/Water Slurry flow at Piping Elements" The 16th Multiphase Flow Symposium '97. 85-86 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yoshio Kawamura: "Development of Apparatuses for Cooling Energy Tranport Using Ice/Water Slurry" The 16th Multiphase Flow Symposium '97. 87-88 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yoshitaka Kawada: "Heat Transfer Characteristics between Ice Particles and Water" The 16th Multiphase Flow Symposium '97. 93-94 (1997)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-03-16  

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