Authors : Ali Hussein Ghitheeth, Mas FawziMohd Ali and Mohammed W. Aljibory
Abstract: Increasing interest in the heat transfer enhancement but of its great importance in many different industrial applications. So, a CFD Model was used to simulate the heat transfer enhancement process in the circular tube with and without a metal chain insert turbulent flow conditions. And in this research, ANSYS Fluent Version 18.2 was used to demonstrate the effect of a metal chain turbulator on heat transfer and the properties of fluid friction in the heat exchanger pipe. The simulation was performed by inserting different metal chains into the tube. The metal chains used differ only in the length of the ring and five lengths of the ring were used P = 20, 40, 60, 80 and 100 mm. During the CFD simulation, the HFO was passed at 30°C during the controlled test tube under a constant temperature of the uniform wall. The Reynolds number was changed to five number from 2500-12,500. According to the results, the thermal enhancement factor (η) tends to lower with the increasing of Reynolds number for all cases depending on the Reynolds number Re and p-values. While the maximum η is about 2.4 is achieved with a metal chain at length of ring P = 60 mm compared to a plain tube and which is higher than other metal chains by 1.7-8.2%. In addition, the results also show that P = 20 mm give the highest rate of heat transfer accompanied by the highest pressure.
Ali Hussein Ghitheeth, Mas FawziMohd Ali and Mohammed W. Aljibory, 2018. Investigate the Effect of the Metal Chain Insertion into the Heat Exchanger Tube on the Thermal Performance Factor. Journal of Engineering and Applied Sciences, 13: 7560-7567.