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논문 기본 정보

자료유형
학술저널
저자정보
저널정보
대한설비공학회 설비공학논문집 설비공학논문집 제14권 제9호
발행연도
2002.9
수록면
756 - 766 (10page)

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초록· 키워드

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Experimental work was performed on the flow characteristics of R-22 and R-134a in small diameter tubes. The experimental apparatus was made up of liquid pump, pre-heater, sight-glass, condenser and measurement instruments. The sight-glass for flow pattern observations was located at the outlet of the pre-heater. The experiment was carried out to show the flow characteristics of R-22 and R-134a. Data were taken with test conditions in the following ranges; the mass flux was ranged from 100 to 1,000 ㎏/㎡s, the saturation temperature was 30℃ and the vapor quality was ranged from 0.1 to 0.9. The main results were summarized as follows; In the flow patterns during evaporation, the annular flow in a 2 ㎜ inner diameter tube occurred at a relatively lower quality and mass velocity, compared to the flow in a 8 ㎜ inner diameter tube. The evaporation flow in small diameter tubes has been shown major deviations with the Mandhane, Taitel-Dukler's and Wambsganss' flow pattern maps but it was similar to the Dobson's flow pattern map.

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ABSTRACT

1. 서론

2. 실험장치

3. 실험결과 및 고찰

4. 결론

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UCI(KEPA) : I410-ECN-0101-2009-553-015236689