서지주요정보
수평 평활관내 R404A와 R152a 흐름의 비등 및 응축 열전달 계수에 관한 검토 = Examination of boiling and condensation heat transfer coefficients of R404A and R152a flows in a horizontal smooth tube
서명 / 저자 수평 평활관내 R404A와 R152a 흐름의 비등 및 응축 열전달 계수에 관한 검토 = Examination of boiling and condensation heat transfer coefficients of R404A and R152a flows in a horizontal smooth tube / 이치영.
발행사항 [대전 : 한국과학기술원, 2006].
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등록번호

8017214

소장위치/청구기호

학술문화관(문화관) 보존서고

MME 06042

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이용가능(대출불가)

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초록정보

In the present experimental study, boiling and condensation heat transfer coefficients between R404A and R152a flow in a horizontal smooth tube were compared. The outer and inner diameters of the tube were 9.52 mm and 7.55 mm, respectively, and the heated length was 1045 mm. In case of flow boiling, the mass flux ranged from 150 to 350 kg/$m^2$ and the test section were uniformly heated from 6 to 14 kW/$m^2$. The quality range was from 0.1 to 0.9 at the saturation temperature from 12 to 17 $^\circ$ . For the present experimental range, the experimental data best fits the Gungor and Winterton(1986) flow boiling correlation within the mean deviation of 6 % for R404A and Kandlikar(1990) flow boiling correlation within the mean deviation of 10 % for R152a among the correlations tested. In case of flow condensation, the mass flux ranged from 150 to 400 kg/$m^2$ and the test section were uniformly heated from 8 to 12.5 kW/$m^2$. The quality range was from 0.2 to 0.8 at the saturation temperature from 27.3 to 34 $^\circ$. A modified correlation for the flow condensation, based on the Dobson and Chato correlations, was proposed. The modified correlation reduced the average deviations of 16 % for R404A and 7 % for R152a compared to the original Dobson and Chato(1998) correlations.

서지기타정보

서지기타정보
청구기호 {MME 06042
형태사항 xii, 99 p. : 삽화 ; 26 cm
언어 한국어
일반주기 부록 : A, R404A 흐름 비등 실험 데이터. - B, R152a 흐름 비등 실험 데이터. - C, R404A 흐름 응축 실험 데이터. - D, R152a 흐름 응축 실험 데이터
저자명의 영문표기 : Chi-Young Lee
지도교수의 한글표기 : 이상용
지도교수의 영문표기 : Sang-Yong Lee
학위논문 학위논문(석사) - 한국과학기술원 : 기계공학전공,
서지주기 참고문헌 : p. 90-93
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