Simplified analysis of thermal contact resistance on arc-slotted fin core

The fin and tube exchanger is one of the widely used heat transfer equipment in the world. The thermal contact resistance (TCR) in fin collar is highly impacting on the heat transfer performance of the fin-and-tube heat exchangers. So this paper tests three versions of fin collar and does some CFD simulations in order to find out the rules of TCR varying; Uses CFD-simulation help to do some analysis on heat exchangers heat transfer performance. The results shows that, heat transfer performance of type-C version fin collar is enhanced nearly 14% comparing with the type-A version; the TCR is impacting on heat exchanger performance K, and has less impact on heat exchanger pressure drop P and fin surface convection; In a real arc-slotted fin core, as the Re increases, the TCR decreases. The evaluation method of TCR can be used to simulate the heat transfer process and the flow condition in the heat exchanger, and help to improve fin core design. The analysis results are also showing the reason of TCR exist.