TY - JOUR
TI - Experimental studies on effect of bonding the twisted tape with pins to the inner surface of the circular tube
AU - Selvam Swaminathan
AU - Thiyagarajan Periyakaruppan
AU - Suresh Sivan
JN - Thermal Science
PY - 2014
VL - 18
IS - 4
SP - 1273
EP - 1283
PT - Article
AB - 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.