Heat transfer enhancement of double pipe heat exchanger with FDM delta-channel winglet inserts
Tejashri N. More,  Dr. N. C. Ghuge
For the enhancement in performance of the heat exchanger, it is decided to increase the turbulence and intermixing of flow of hot fluid inside the hot fluid pipe by means of specially design delta winglets that will be placed within the inner tube and these winglets are produced by the 3-d printing process .The winglet serve dual purpose namely- one to increase the surface area and other to improve the interaction between particles and thereby increasing the heat transfer.
In this work, 3-D printed delta winglet holder used in Inline, 5 degree inclined and 10degree inclined staggered position in double pipe heat exchanger. It is observed that heat transfer rate of the 10 degree inclined configuration of counter flow is better than that of parallel flow configuration. The thermal analysis shows that the maximum heat flux is 31.80W/mm². The increased heat transfer rate can be attributed to higher turbulence and closer interaction of the working fluids. This is achieved with the complex design of delta winglet to create turbulence. The comparative results also displayed in the paper.
Keywords- 3-D printed delta winglet, Effectiveness, overall heat transfer coefficient etc.
Cite this Article
Tejashri N. More,  Dr. N. C. Ghuge,   "Heat transfer enhancement of double pipe heat exchanger with FDM delta-channel winglet inserts"
, International Journal of Engineering Development and Research (IJEDR), ISSN:2321-9939, Volume.7, Issue 3, pp.395-405, August 2019, Available at :http://www.ijedr.org/papers/IJEDR1903068.pdf