Доступ предоставлен для: Guest
Портал Begell Электронная Бибилиотека e-Книги Журналы Справочники и Сборники статей Коллекции
Journal of Enhanced Heat Transfer
Импакт фактор: 0.562 5-летний Импакт фактор: 0.605 SJR: 0.211 SNIP: 0.361 CiteScore™: 0.33

ISSN Печать: 1065-5131
ISSN Онлайн: 1026-5511

Выпуски:
Том 26, 2019 Том 25, 2018 Том 24, 2017 Том 23, 2016 Том 22, 2015 Том 21, 2014 Том 20, 2013 Том 19, 2012 Том 18, 2011 Том 17, 2010 Том 16, 2009 Том 15, 2008 Том 14, 2007 Том 13, 2006 Том 12, 2005 Том 11, 2004 Том 10, 2003 Том 9, 2002 Том 8, 2001 Том 7, 2000 Том 6, 1999 Том 5, 1998 Том 4, 1997 Том 3, 1996 Том 2, 1995 Том 1, 1994

Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.2013007609
pages 235-250

CONDENSATION HEAT TRANSFER AND PRESSURE DROP OF R-410A IN THREE 7.0MM OUTER DIAMETER MICROFIN TUBES HAVING DIFFERENT INSIDE GEOMETRIES

Nae-Hyun Kim
Department of Mechanical Engineering, Incheon National University, 12-1 Songdo-Dong, Yeonsu-Gu Inchon, 22012, Korea
H. W. Byun
Department of Mechanical Engineering, University of lncheon, 12-1, Songdo-Dong, Yeonsu-gu, Incheon, 406-772, Republic of Korea
J. K. Lee
School of Mechanical System Engineering, Incheon National University, Incheon, Korea

Краткое описание

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.


Articles with similar content:

EFFECT OF ASPECT RATIO ON EVAPORATION HEAT TRANSFER AND PRESSURE DROP OF R-410A IN FLATTENED MICROFIN TUBES
Journal of Enhanced Heat Transfer, Vol.22, 2015, issue 3
Nae-Hyun Kim
Enhancement of Condensation Heat Transfer on Integral-Fin Tubes Using Radiused Fin-Root Fillets
Journal of Enhanced Heat Transfer, Vol.1, 1994, issue 2
Adrian Briggs, John W. Rose, X.-L. Wen
Two-Phase Flow Pressure Drop of R1234YF and R134A in a Mini-Channel Multiport Tube
International Heat Transfer Conference 15, Vol.51, 2014, issue
Jose Ramon Garcia-Cascales, Francisco Ramirez-Rivera, Francisco Vera-Garcia, Alejandro Lopez-Belchi, Fernando Illan-Gomez
CONDENSATION HEAT TRANSFER AND PRESSURE DROP CHARACTERISTICS OF R-134A IN HORIZONTAL SMOOTH TUBES AND ENHANCED TUBES FABRICATED BY SELECTIVE LASER MELTING
International Heat Transfer Conference 16, Vol.7, 2018, issue
Kai Choong Leong, Xuwen Wang, Teck Neng Wong , Jin Yao Ho
FILM CONDENSATION OF ETHYLENE GLYCOL ON A HORIZONTAL TUBE AT HIGH VAPOUR VELOCITY
International Heat Transfer Conference 8, Vol.4, 1986, issue
John W. Rose, S. B. Memory