Given the following for a simple, cocurrent exchanger: tube outside diameter, Do = 0.75 inches tube inside diameter, Di = 0.62 inches inside heat transfer coefficient, hi = 569 btu/ft2-hr-F outside heat transfer coefficient, ho = 878 btu/ft2-hr-F outside fouling factor, hfo = 542 btu/ft2-hr-F tube wall thermal conductivity, 26 = btu/hr-ft-F What is the tube wall log mean diameter, Dlm in inches? What is the overall heat transfer coefficient, Uo in btu/ft2-hr-F?

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