Numerical and Experimental Comparision of Heat Transfer Enhancement in A 2-Pass Double Pipe Heat Exchanger with and without Inserted Twisted Tapes

摘要

Enhancement of heat transfer using twisted tapes inserted in a 2-pass double pipe heat exchanger is studied experimentally and numerically using Ansys Fluent. A numerical model is developed to investigate the effects of cold water flow rates on the Nusselt number, overall heat transfer coefficient in both inner pipe and annulus. Results show that the numerical and experimental results are in good agreement with each other. The twist ratio for numerical heat transfer enhancement is taken as y=10.