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Help Heat Exchanger Correlation

Help Heat Exchanger Correlation

(OP)
Hi All,

I have one question for you concerning Wang correlation for a heat exchanger.

The correlation is expressed as function of the Dh (hydraulic diameter) computed as 4*Ac*L/Ao

My question is: having a finned tube heat exchanger with staggered configuration, how can I compute the parameters in the formula above? It is a bit confusing in the Wang Paper (2000)

Thanks in advance

F_Naval

Ps: if you need more detail let me know

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