Characterization of the Pressure Drop during Condensation in Channels of Multi-Channel Cylinder Dryer Using Homogeneous and Separated Flow Models

Lijie Qiao; Jixian Dong; Huan Liu; Bo Wang; Sha Wang; Yan Dong; Haozeng Guo

doi:10.7584/JKTAPPI.2021.08.53.4.64

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자료유형: 학술저널

저자정보: Lijie Qiao (Shaanxi University of Science & Technology) Jixian Dong (Shaanxi University of Science & Technology) Huan Liu (Shaanxi University of Science & Technology) Bo Wang (Shaanxi University of Science & Technology) Sha Wang (Shaanxi University of Science & Technology) Yan Dong (Shaanxi University of Science & Technology) Haozeng Guo (Shaanxi University of Science & Technology)

저널정보: 한국펄프·종이공학회 펄프·종이기술 펄프·종이기술 제53권 제4호(통권 제201호)

발행연도: 2021.8

수록면: 64 - 77 (14page)

DOI: 10.7584/JKTAPPI.2021.08.53.4.64

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The condensation resistance characteristics of steam flow in horizontal rectangular channels of multi-channel cylinder dryer (MCD) is a very important factor that affects the heat transfer, while it is not very clear due to the limited studies. In this paper, the frictional resistance characteristics of the two-phase flow (steam and water) in the rectangular small channels of MCD were investigated with deionized water as the working fluid, and the calculation models, homogeneous and separated flow models, of the two-phase flow pressure drop in the channel were verified and evaluated. It showed that the main part of the total pressure drop was the frictional pressure drop, which means that the calculation of frictional pressure drop was the key to the calculation of the pressure drop of the two-phase flow in the channel. Meanwhile, it was found that the homogeneous model was not suitable for the calculation of the frictional pressure drop and the separated flow model was completely in line with the experimental data. In this study, the converted coefficient of complete steam/liquid phase were concerned to calculate the frictional resistance using five separated flow models. It was found that the Chisholm B model showed better accuracy than prior correlations, which was greatly consistent with experimental data, and the average absolute percentage deviation (MAPE) was 24.9%.

#Two-phase flow #pressure drop,resistance experiment #multi-channel cylinder dryer

참고문헌 (19)

참고문헌 신청

Choi S. U. S. / 2001 / A novel multiport cylinder dryer / Tappi Journal 84(2):73~79

Shin J. H. / 2010 / Flow and thermal characteristics of condensing steam in a single horizontal mini-channel of a multiport cylinder dryer / Drying Technology 29(1):47~54

Yan Y. / 2017 / Visualization study of steam condensation in rectangular channel of multichannel cylinder dryer / Journal of heat transfer 139(5):054503

McAdams W. H. / 1942 / Vaporization inside horizontal tubes-Ⅱ-benzene-oil mixtures / Trans ASME 64(3):193~200

Cicchitti A / 1959 / Two-phase cooling experiments: pressure drop, heat transfer and burnout measurements / Energia Nucleare 7(6):407~425

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