| Project/Area Number |
59850035
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| Research Category |
Grant-in-Aid for Developmental Scientific Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Thermal engineering
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
ECHIGO Ryozo Department of Mechanical Engineering, Tokyo Institute of Technology, Professor, 工学部, 教授 (70037737)
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| Co-Investigator(Kenkyū-buntansha) |
金藤 こう一郎 大同特殊鋼(株), 機械事業部, 主査
ICHIMIYA Koichi Department of Mechanical Engineering, Yamanashi University, Associate Professor,, 工学部, 助教授 (30037923)
HANAMURA Katsunori Department of Mechanical Engineering, Tokyo Institute of Technology, Research As, 工学部, 助手 (20172950)
YOSHIDA Hideo Department of Mechanical Engineering, Tokyo Institute of Technology, Research As, 工学部, 助手 (50166964)
YOSHIZAWA Yoshio Department of Mechanical Engineering, Tokyo Institute of Technology, Associate P, 工学部, 助教授 (00016627)
KINTO Koichiro Daido Steel Co., Ltd., Manager
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| Project Period (FY) |
1984 – 1986
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| Project Status |
Completed (Fiscal Year 1986)
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| Budget Amount *help |
¥12,900,000 (Direct Cost: ¥12,900,000)
Fiscal Year 1986: ¥2,900,000 (Direct Cost: ¥2,900,000)
Fiscal Year 1985: ¥3,800,000 (Direct Cost: ¥3,800,000)
Fiscal Year 1984: ¥6,200,000 (Direct Cost: ¥6,200,000)
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| Keywords | Process Saving and Energy Saving in Steel Industry / Direct Rolling / Slab Edge Heater / Impinging Jet / Radiative Heat Transfer / 非定常流動伝熱 |
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| Research Abstract |
This study aims at clarifying heat transfer performances of a newly suggested temperature equalizer with the radiative converter for a slab in the continuous casting-direct rolling (CC-DR) process. The present temperature equalization is an application of the effective energy conversion method between gas enthalpy and thermal radiation by using porous media.
Since the heat transfer system considered here is very complex owing to the conjugation of transient conductive, convective and radiative heat transfer, a fundamental study was carried out first by focusing attention on the the effect of convective heat transfer. On the basis of the numerically calculated laminar flow field around the slab, the transient heat conduction wihtin the slab was predicted. For the turbulent flow field which is of practical importance, the heat transfer experiment was conducted at a moderate temperature, and the systematic data for various conditions were accumulated.
The high-temperature experiment was made by using the model temperature equalizer which is about one fifth of the actual one in dimensions. To simulate the CC-DR process in the experiment, the uniformly preheated model slab was cooled first by thermal radiation, and was subsequently fed into the temperature equalizer. By measurements of transient slab temperatures, it has proved that the radiative converter equalizes the slab temperature quickly owing to the local heating of the slab edge. Furthermore, the estimation of the overall energy balance in the temperature equalizer has demonstrated that efficient temperature equalization is feasible if the available energy flowing out of it is recovered.
In addition to these investigations, the field tests were made and the feasibility of the present edge heater was discussed by Kinto in Daido Steel Co., Ltd. who has enough experience in designing the edge heater of CC-DR and in introducing the radiative converter into the working facilities.
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