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Study of Direct Contact Heat Transfer Characteristics from a Liquid Ice

Research Project

Project/Area Number 04452144
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field Thermal engineering
Research InstitutionHokkaido University

Principal Investigator

FUKUSAKO Shoichiro  Hokkaido Univ.Fac.of Eng., Professor, 工学部, 教授 (00001785)

Co-Investigator(Kenkyū-buntansha) HORIBE Akihiko  Hokkaido Univ.Fac.of Eng., Instructor, 工学部, 助手 (50229241)
YAMADA Masahiko  Hokkaido Univ.Fac.of Eng., Assoc.Professor, 工学部, 助教授 (70230480)
田子 真  北海道大学, 工学部, 助手 (50171682)
Project Period (FY) 1992 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥8,000,000 (Direct Cost: ¥8,000,000)
Fiscal Year 1994: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1993: ¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1992: ¥5,100,000 (Direct Cost: ¥5,100,000)
KeywordsLiquid Ice / Heat Removal / Cold Heat Storage / Cold Heat Transport / Melting Heat Transfer / Forced Convection / Saving of Environment / Normalizing of Electricity / 蓄冷熱 / PCM
Research Abstract

An experimental study has been performed to investigate the direct contact heat transfer characteristics between air and liquid ice. The effects of concentration of solution, inlet-air temperature, height of liquid-ice bed, and the flow rate of inle-air on the heat-removal performances were extensively examined. The results revealed that the flow rate of inlet-air exertes considerable effects on the direct contact heat transfer characteristics, and that there might be an optimum condition of the flow rate of air for total removed heat. The average heat removal rate was favorably correlated by the flow rate of inlt-air and the temperature difference between inlet-air and equilibrium freezing temperature of initial concentration of solution.
The experimental apparatus fundamentally consists of test section, cooling-brine circulating loop, and air cooling system. The fluidization air for the three-phase fluidized bed was utilized as the medium of direct contact heat transfer. Air was coole … More d and dehuminided in the air chamber in advance. After both the flow rate and the temperature of air and humidity were favorably controlled, it was introduced to the test section. The test section consists of a test bessel, a distributor, and the calming section. The test vessel is made of transparent lucite tube which has dimensions of 150 mm in inner diameter and 330 mm in length. In order to obtain the uniform air flow at the inlet of test section, stainless mesh (20 mesh) and the Nylon cloth (200 mesh) along with the distributor were utilized at the inlet of the tube.
The testing liquid ice was made up by mixing the fine ice particles and ethylene-glycol solution whose temperature and concentration were set in prescribed value. Ice packing factor was set constant at 62%. The initial height of the testing liquid ice h_b was set at 170 mm throu the experiments.
Experiments were carried out to study the direct contact heat transfer characteristics of the solid-air-liquid three-phase fluidized liquid ice-bed. The following conclusions may be drawn within the parameters covered in the present study.
(1) The heat removal rate is affected by the flow rate of inlet-air mostly and the temperature of inlet-air and initial concentration of solution, while it is little affected by the height of the liquid ice bed.
(2) The total removed heat decreases as the flow rate of air increases owing to mainly the heat generation by the friction between the wall and liquid ice.
(3) The average heat removal rate is correlated by the following equation within the deviation of <plus-minus>15
DELTAh_<ave>=1.131 Q_a^<1.127>DELTAT^<1.248> Less

Report

(4 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • 1992 Annual Research Report
  • Research Products

    (5 results)

All Other

All Publications (5 results)

  • [Publications] M.Yamada: "Direct-Contact Heat-Transfer Characteristics From a Liquid Ice Layer" Experimental Heat Transfer,Fluid Mechanics,and Thermodynamics,1993. 2. 1682-1687 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Yamada, M., Fukusako, S., and Horibe, A.: "Direct-Contact Heat-Transfer Characteristics From a Liquid Ice Layr" Experimental Heat Transfer, Fluid Mechanics and Thermo-dynamics 1933. Vol.2. 1682-1687 (1933)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 福迫尚一郎: "リキッドアイスよりの直接接触熱伝達に及ぼす層高の影響" 日本機械学会北海道講演会論文集. (発表予定).

    • Related Report
      1994 Annual Research Report
  • [Publications] M.Yamada: "Direct-Contact Heat-Transfer Characteristics From a Liquid Ice Layer" Experimental Heat Transfer,Fluid Mechanics,and Thermodynamics 1993. 2. 1682-1687 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] M.Yamada: "Direct-Contact Hear-Transfer Characteristics From a Liguid Ice Layer" Proceedings of 3rd World Conference on Experimental Heat Transfer,Fluid Mechauics,and Thermodynamics. (1993)

    • Related Report
      1992 Annual Research Report

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Published: 1992-04-01   Modified: 2016-04-21  

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