[Steam-engine] heating surface

[Robert Smith]

Dan Donaldson wrote:

> Is the heating surface the inside or outside of the pipe?  Now that I
> think about it the outside of the pipe makes more since.
>

For the kind of 'steam engineering' that we do, it hardly matters.  But,
yes, the thickness of the tube does matter if you are doing high
precision analysis of a many-tubed heat exchanger.  In that context, the
I.D. is the surface exposed to the heat so that is what should matter.

    Happy steamin'

        Bob Smith


>
> -----Original Message-----
> From: steam-engine-bounces at lists.stationary-engine.com
> [mailto:steam-engine-bounces at lists.stationary-engine.com] On Behalf Of
> Andre' Blanchard
> Sent: Monday, July 24, 2006 12:47 PM
> To: Steam-engine mailing list
> Subject: Re: [Steam-engine] heating surface
>
> 2" * Pi * 45"
> 2 * 3.142 * 45 = 282.8 sq. in.
> 282.8 / 144 = 1.96 sq. ft.
>
>
> At 11:22 AM 7/24/2006, you wrote:
>> I most likely should have payed closer attention in math class, but
>> no one ever taught it as it applies to steam engines.  (what a great
>> idea!)  anyhow does anyone care to educate me on the heating surface
>> of a tube?  It is 2" in diameter and 45 inches long.  I keep getting
>> interesting answers.... but am not sure they are right.
>>
>>   thanks
>
> __________
> Andre' B.  Clear Lake, Wi.
>
>
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