Compare the outside coefficient in a crossflow exchanger [Eq. (15.8)] with that predicted by the Donohue equation

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Compare the outside coefficient in a crossflow exchanger [Eq. (15.8)] with that predicted by the Donohue equation [Eq. (15.6)] for typical values of Re and Pr. Why are the values from the Donohue equation so much lower?

Eq. 15.8

h.D. k 0.61 0.33 287 (D.G) *** (CH), F (15.8)

Eq. 15.6

 The Donohue equation is 0.6 0.33 0.14 h.D. - 0.2 (D.G.) ** (H)** (1) *** k k (15.6) 

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Unit Operations Of Chemical Engineering

ISBN: 9780072848236

7th Edition

Authors: Warren McCabe, Julian Smith, Peter Harriott

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