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이 논문의 연구 히스토리 (4)

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In the present investigation, experiments and numerical analysis during melting process of a phase change material were performed to research heat transfer phenomena generated by means of conduction and natural convection in the vertical tube at inward melting.
The phase change material used in the experiments is 99 percent pure n-Docosan paraffin(C₂₂H_(46)).
In the results, it is found that the velocity of phase change interface at the top of tube is faster than at the bottom of tube because of the effect of natural convection, and that the distribution of velocity at the liquid region is little affected by the initial temperature of phase change material.
And it is found that the velocity of phase charge interface is slower as the initial temperature of phase change material is lower, and that the effect of natural convection is larger as the aspect ratio of tube is larger.
In tendency of heat transfer phenomena, the experimental results were well corresponded with numerical results.
But there were a little disagrements between the results of experiment and numerical analysis because of the assumption of the constant volumetric expansion coefficient in numerical analysis.

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1. 요약 (SUMMARY)

2. 내용 (CONTENTS)

3. 결과 및 논의 (RESULT AND DISCUSSION)

4. 결론(CONCLUSION)

5. 참고문헌(REFERENCE)

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UCI(KEPA) : I410-ECN-0101-2009-563-018201693