설비공학논문집 (Korean Journal of Air-Conditioning and Refrigeration Engineering)
- 제10권6호
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- Pages.763-772
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- 1998
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- 1229-6422(pISSN)
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- 2465-7611(eISSN)
수평 회전 히트파이프에서 내부 삽입 코일이 유동 형태 및 열전달 성능에 미치는 영향에 대한 실험 연구
An experimental study on the effects of an inserted coil on flow patterns and heat transport performances for a horizontal rotating heat pipe
초록
The effects of an inserted coil on flow patterns and heat transport performance for a horizontal rotating heat pipe have been studied experimentally. Especially, the present study is to see an internally inserted helical coil inside a RHP would lead to the same kind of results as internal fins. Visualization test conducted for an acryl tube, charged water with at a volumetric rate of 20%. When the flow kept pool regime at a low RPM(less than 1,000 RPM), the movement of coil forced the water to flow in axial direction. But this pumping effect of coil disappeared, when the pool regime changed to annular one which could be created by increasing RPM. The pumping effects for RHP with an inserted coil resulted enhancement both in condensation heat transfer coefficient and heat transport limitation, as obtained in case of using internal fins. But all these effects became negligible in the range of higher RPM(above 1,000∼1,200) with the transition of flow regime to annular flow.
키워드