Publicado 8 números por año
ISSN Imprimir: 1065-5131
ISSN En Línea: 1563-5074
Indexed in
CONDENSATION HEAT TRANSFER AND PRESSURE DROP OF R-410A IN THREE 7.0MM OUTER DIAMETER MICROFIN TUBES HAVING DIFFERENT INSIDE GEOMETRIES
SINOPSIS
R-410A condensation heat transfer and pressure drop data are provided for three different 7.0 mm outer diameter microfin tubes. The microfin tubes had different helix angles, fin heights, and fin apex angles. Tests were conducted for a range of quality (0.2 ∼ 0.8), mass flux (345 kg/m2s ∼ 604 kg/m2s), and saturation temperature (45°C ∼ 55°C). It was found that a microfin tube having a larger interfin area or smaller helix angle is more beneficial for condensation heat transfer. Increased flow velocity in the interfin region along with stronger turbulence and surface tension induced drainage for sharper fins may be responsible for the increase of heat transfer coefficient. Pressure drop was also larger in a microfin tube having a larger apex angle. Both heat transfer coefficient and pressure drop increased as mass flux or quality increased. However, they decreased as saturation temperature increased. The range of heat transfer enhancement factor (1.23 ∼ 1.83) was comparable with that of the pressure drop penalty factor (1.36 ∼ 2.26). Data are compared with available heat transfer and pressure drop correlations.
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Kim Nae-Hyun, Evaporation Heat Transfer and Pressure Drop of R-410A in a 7.0 mm O.D. Microfin Tube at Low Flow Rates, Transactions of the Korean Society of Mechanical Engineers B, 39, 9, 2015. Crossref
-
Kim Nae-Hyun, Evaporation Heat Transfer and Pressure Drop of R-410A in a 5.0 mm O.D. Smooth and Microfin Tube, International Journal of Air-Conditioning and Refrigeration, 23, 01, 2015. Crossref
-
Kim Nae-Hyun, Evaporation heat transfer and pressure drop of R-410A in three 7.0 mm O.D. microfin tubes having different inside geometries, Journal of Mechanical Science and Technology, 29, 8, 2015. Crossref
-
Sun Zhi-chuan, Li Wei, A new general correlation for frictional pressure drop during condensation inside horizontal micro-fin tubes, International Journal of Heat and Mass Transfer, 112, 2017. Crossref
-
Zhang Jingzhi, Zhou Naixiang, Li Wei, Luo Yang, Li Shizhen, An experimental study of R410A condensation heat transfer and pressure drops characteristics in microfin and smooth tubes with 5 mm OD, International Journal of Heat and Mass Transfer, 125, 2018. Crossref
-
Li Shulei, Jiang Yiqiang, Cai Weihua, Li Qian, Zhang Haochun, Ren Yan, The influence of structural parameters on heat transfer and pressure drop for hydrocarbon mixture refrigerant during condensation in enhanced spiral pipes, Applied Thermal Engineering, 140, 2018. Crossref
-
Kim Nae-Hyun, Gook Hyung-Ho, Lee Byung-Moo, Condensation Heat Transfer and Pressure Drop of R-404A in 7.0 mm O.D. Smooth and Microfin Tube at Low Mass Fluxes, International Journal of Air-Conditioning and Refrigeration, 26, 01, 2018. Crossref
-
Li Wei, Tang Weiyu, Chen Jingxiang, Zhu Hua, Kukulka David J., He Yan, Sun Zhijian, Du Jincai, Zhang Bin, Convective condensation in three enhanced tubes with different surface modifications, Experimental Thermal and Fluid Science, 97, 2018. Crossref
-
Lin Yuansheng, Li Junye, Chen Zengchao, Li Wei, Ke Zhiwu, Ke Hanbing, Two-Phase Flow Heat Transfer in Micro-Fin Tubes, Heat Transfer Engineering, 42, 5, 2021. Crossref
-
Mehendale Sunil S., Condensing heat transfer of pure refrigerants and refrigerant mixtures flowing within horizontal microfin tubes: A new model, International Journal of Refrigeration, 103, 2019. Crossref
-
Wu Zan, Sundén Bengt, Frictional Pressure Drop Correlations for Single-Phase Flow, Condensation, and Evaporation in Microfin Tubes, Journal of Heat Transfer, 138, 2, 2016. Crossref
-
Li Wei, Guo Yu, Gu Zong-Bao, Ma Xiang, Ayub Zahid, He Yan, Kukulka David J., An Experimental Study of R134a Condensation Heat Transfer in Horizontal Smooth and Enhanced Tubes, Journal of Heat Transfer, 142, 7, 2020. Crossref