✦ LIBER ✦

Effect of void fraction models on the film thickness of R134a during downward condensation in a vertical smooth tube

✍ Scribed by A.S. Dalkilic; S. Laohalertdecha; S. Wongwises

Publisher: Elsevier Science
Year: 2009
Tongue: English
Weight: 823 KB
Volume: 36
Category: Article
ISSN: 0735-1933
DOI: 10.1016/j.icheatmasstransfer.2008.10.015

No coin nor oath required. For personal study only.

📜 SIMILAR VOLUMES

Experimental investigation of convective

Experimental investigation of convective heat transfer coefficient during downward laminar flow condensation of R134a in a vertical smooth tube

✍ A.S. Dalkilic; S. Yildiz; S. Wongwises 📂 Article 📅 2009 🏛 Elsevier Science 🌐 English ⚖ 433 KB

Experimental investigation of heat trans

Experimental investigation of heat transfer coefficient of R134a during condensation in vertical downward flow at high mass flux in a smooth tube

✍ A.S. Dalkilic; S. Laohalertdecha; S. Wongwises 📂 Article 📅 2009 🏛 Elsevier Science 🌐 English ⚖ 916 KB

The two-phase heat transfer coefficients of pure HFC-134a condensing inside a smooth tube-in-tube heat exchanger are experimentally investigated. The test section is a 0.5 m long double tube with refrigerant flowing in the inner tube and cooling water flowing in the annulus. The inner tube is constr

Artificial neural network techniques for

Artificial neural network techniques for the determination of condensation heat transfer characteristics during downward annular flow of R134a inside a vertical smooth tube

✍ M. Balcilar; A.S. Dalkilic; S. Wongwises 📂 Article 📅 2011 🏛 Elsevier Science 🌐 English ⚖ 984 KB

In this study, the best artificial intelligence method is investigated to estimate the measured convective heat transfer coefficient and pressure drop of R134a flowing downward inside a vertical smooth copper tube having an inner diameter of 8.1 mm and a length of 500 mm during annular flow numerica

Validation of void fraction models and c

Validation of void fraction models and correlations using a flow pattern transition mechanism model in relation to the identification of annular vertical downflow in-tube condensation of R134a

✍ A.S. Dalkilic; S. Wongwises 📂 Article 📅 2010 🏛 Elsevier Science 🌐 English ⚖ 527 KB

Comparison of frictional pressure drop m

Comparison of frictional pressure drop models during annular flow condensation of R600a in a horizontal tube at low mass flux and of R134a in a vertical tube at high mass flux

✍ A.S. Dalkilic; O. Agra; I. Teke; S. Wongwises 📂 Article 📅 2010 🏛 Elsevier Science 🌐 English ⚖ 488 KB

This study compares well-known two-phase pressure drop models with the experimental results of a condensation pressure drop of (i) R600a in a 1 m long horizontal smooth copper tube with an inner diameter of 4 mm, outer diameter of 6 mm and (ii) R134a in a 0.5 m vertical smooth copper tube with an in

Improved flow pattern map for accurate p

Improved flow pattern map for accurate prediction of the heat transfer coefficients during condensation of R-134a in smooth horizontal tubes and within the low-mass flux range

✍ R. Suliman; L. Liebenberg; J.P. Meyer 📂 Article 📅 2009 🏛 Elsevier Science 🌐 English ⚖ 628 KB

This paper presents an improved flow pattern map for predicting the heat transfer coefficients during condensation of R-134a inside a smooth horizontal tube. Experimental tests were conducted over the low-mass flux range of 75-300 kg/m 2 s, at a nominal saturation temperature of 40 °C, and with the