Author: Incropera, Heat and Mass Transfer , 6th edition, Chapter 8, Problem 97 A

Question

Author: Incropera, Heat and Mass Transfer , 6th edition, Chapter 8, Problem 97

An electrical Power Transformer of diameter 300mm and height 500mm dissipates 1000 W. It is desired to maintain its surface temperature at 47 C by supplying glycerin at 24 C through thin-walled tubing o 20 mm diameter welded to the lateral surface of the transformer. All the heat dissipated by the transformer is assumed to be transferred to the glycerin.
Assuming the maximum allowable temeprature rise of the coolant to be 6 C and fully developed flow through the tube, determine the required coolant flow rate, the total length of tubing, and the lateral spacing S between turns of the tubing.

Explanation / Answer

Here is the solution, I found it on google: http://gyazo.com/2eaa9dba610e59de167c0c66d39416e7.png http://gyazo.com/702d61c22f3a589c72a0032cf94cc8ab.png I uploaded to the links above.

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