[TR] Water pumps.

[Michael Marr]

The units of the heat transfer coefficient are BTU/sq ft-deg.  There is no time element in those units.  Changing the rate of flow through a heat exchanger, assuming the entering temperature stays the same, and operating within the design limits of the heat exchanger, simply changes the leaving temperature of the fluid.

And, I am a real engineer....

Mike

Michael Marr
Albion Technical Services
Mobile:  630-202-0065

Sent from my iPad

> On May 11, 2017, at 07:08, Jeff Scarbrough <fishplate at gmail.com> wrote:
> 
> On Wed, May 10, 2017 at 11:31 PM, Michael Marr
> <mmarr at albiontechnical.com> wrote:
>> The flow rate of the fluid through the heat exchanger does not affect how much heat is transferred.
> 
> This is true, but...
> 
> When warm fluid is replaced by cooler fluid, the delta T increases,
> resulting in faster heat transfer.
> 
> There is a happy medium, and I'm sure that back in the day, real
> engineers spent a lot of time with different vanes and pulley sizes
> until they found a combination that works.  Or maybe they just got
> lucky?
> 
> Jeff Scarbrough
> Corrosion Acres, Ga.
> 
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