Open AccessExperimental studies on effect of bonding the twisted tape with pins to the inner surface of the circular tube
Author(s) -
Swaminathan Selvam,
Periyakaruppan Thiyagarajan,
S. Suresh
Publication year - 2014
Publication title -
thermal science/thermal science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.339
H-Index - 43
eISSN - 2334-7163
pISSN - 0354-9836
DOI - 10.2298/tsci120807036s
Subject(s) - nusselt number , materials science , tube (container) , heat transfer , heat exchanger , heat transfer enhancement , pressure drop , turbulence , mechanics , friction factor , composite material , thermodynamics , heat transfer coefficient , reynolds number , physics
Heat transfer and friction factor characteristics are studied for water flowing through the tube in tube heat exchanger for two different configurations, namely,(1) twisted tape with pins (TTP) and (2) twisted tape with pins bonded to the inner surface of the test section (TTPB). Experiments are carried out for different twist pitch to the width of the twisted tape ratios (y/w) for TTP and TTPB. But very few research works have been done based on the above mentioned heat transfer enhancement techniques. This paper presents the effect of twisted tape with pins on the heat transfer for a fully developed turbulent flow. Experiments are conducted by maintaining constant wall temperature. The heat transfer rate and pressure drop is found to be high for TTPB of y/w=3.33 when compared to all other configurations. The empirical correlations developed for different twisted tape with pins results in ?7.28% deviation for Nusselt number and ?7.16% for friction factor.