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Feb14-12, 07:02 PM
Sci Advisor
HW Helper
P: 7,177
Those numbers don't make "common sense" to me.
230 tubes 6.3mm diameter have a total area of 7400mm^2.
You have 9000mm^3 /s of fluid flow
That is a flow velocity of about 1.2mm/sec. How long is your fluid going to take to pass through the exchanger ???

For good heat transfer you don't need a big cross section area. You need a big surface area. I would forget about round tubes and start brainstorming for a completely different geometry of heat exchanger.