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ricecrispi · 10-13-2005, 05:11 AM

The way I see it the fins are nothing more than expanding surface area that doesn't already exist.

True but......

The assumption is the sharp point and brazing to the tube is a bottleneck in performance and limiting the transfer of heat to the fins. I think Nikhsub is proposing straight bends will increase surface area with the tubes to help improve heat transfer into the fins.

The area being overlapped seems to be irrelavent because it is meant to aid more in transfering more heat into the fins.

I think the model makes sense in the diagrams but in real life the diaganol tubing is more like a rounded bend then a point in your diagram. The bend with the brazing probably performs the same as a flat edge bend with the brazing on it.

I'm assuming a rounded bend acts the same as a very small straight flat bend because the brazing is a bigger bottleneck and you will get similiar results.

10-13-2005, 05:11 AM	#19
ricecrispi Cooling Savant Join Date: Jul 2005 Location: california Posts: 429	The way I see it the fins are nothing more than expanding surface area that doesn't already exist. True but...... The assumption is the sharp point and brazing to the tube is a bottleneck in performance and limiting the transfer of heat to the fins. I think Nikhsub is proposing straight bends will increase surface area with the tubes to help improve heat transfer into the fins. The area being overlapped seems to be irrelavent because it is meant to aid more in transfering more heat into the fins. I think the model makes sense in the diagrams but in real life the diaganol tubing is more like a rounded bend then a point in your diagram. The bend with the brazing probably performs the same as a flat edge bend with the brazing on it. I'm assuming a rounded bend acts the same as a very small straight flat bend because the brazing is a bigger bottleneck and you will get similiar results. Last edited by ricecrispi; 10-13-2005 at 05:34 AM.