WIT Press


Heat Transfer Augmentation During Water Steam Condensation On Twisted Profile Tubes

Price

Free (open access)

Paper DOI

10.2495/EQ140461

Volume

190

Pages

12

Page Range

479 - 490

Published

2014

Size

988 kb

Author(s)

Yu. M. Brodov, K. E. Aronson, A. Yu. Ryabchikov & M. A. Nirenstein

Abstract

Some results are presented of experimental and theoretical research of hydrodynamics and heat transfer during condensation of water steam (both stationary and slowly moving) on twisted profile tubes (TPT). For a heat transfer coefficient during condensation of stationary steam on TPT two characteristic areas were observed. At small values of condensate film Reynolds numbers a TPT heat transfer coefficient can be 10–15% below that of the plain tubes depending on profile parameters. With the rise of both condensate film Reynolds number and profile parameter h/s heat transfer coefficient increases up to 50% in comparison to a plain tube. During slowly moving steam condensation the TPT heat transfer coefficient increases up to 70% as compared to a plain tube. Conducted research and industrial tests results showed that the assured effect of a heat transfer coefficient increase in TPT heat exchangers could reach for turbine condensers 15%, for low cycle heaters 35–40%. The heat exchangers hydraulic resistance increases by 40–70%. Keywords: hydrodynamics, heat transfer, condensation, twisted profile tubes, heat exchanger, efficiency.

Keywords

hydrodynamics, heat transfer, condensation, twisted profile tubes, heat exchanger, efficiency.