Interfacial condensation for countercurrent steam–water stratified wavy flow in a horizontal circular pipe

• Published in: International journal of heat and mass transfer Vol. 49; no. 17; pp. 3121 - 3129
• Main Authors: Lee, Kyung-Won, Chu, In-Cheol, Yu, Seon-Oh, No, Hee Cheon
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.08.2006; Elsevier
• Subjects: Applied sciences; Energy; Energy. Thermal use of fuels; Exact sciences and technology; Heat transfer; Horizontal pipe; Interfacial condensation; Stratified flow; Theoretical studies. Data and constants. Metering; Thermal stratification; Thick water layer; Wavy flow; Horizontal pipe; Interfacial condensation; Wavy flow; Thermal stratification; Thick water layer; Stratified flow; Steam water circuit; Nusselt number; Countercurrent flow; Condensation; Heat transfer
• ISSN: 0017-9310; 1879-2189
• DOI: 10.1016/j.ijheatmasstransfer.2006.02.017

We experimentally investigate the interfacial condensation heat transfer for a steam–water countercurrent stratified flow in a horizontal pipe. In contrast to the previous work of Chu et al. [I.C. Chu, S.O. Yu, M.H. Chun, Interfacial condensation heat transfer for countercurrent steam–water stratified flow in a circular pipe. J. Korean Nucl. Soc. 32 (2) (2000) 142–156] that investigated only the interfacial condensation heat transfer in a stratified smooth flow in a horizontal pipe, this work investigates the steam–water stratified wavy flow. A total of 105 local interfacial condensation heat transfer coefficients for a wavy interface have been obtained. The parametric effects of the flow rates of steam and subcooled water and the degree of subcooling on condensation heat transfer were examined. The empirical Nusselt number correlation was developed on the basis of the bulk flow properties. This correlation agrees with the experimental data within ±32% with a RMS error of 16.2%. Its applicable ranges for a steam–water countercurrent stratified flow in a horizontal pipe are as follows: the ranges of Reynolds numbers are 4000–14 000 for the water and 12 000–23 000 for the steam, and the Jakob numbers for the water are 43.5–180.