Unit Conversion- I'm going mad

[themaniac]

Hey people,

I think i'm driving myself mad here.

I'm struggling with the following conversion:

Original Units: BTU/[hr*ft^2*deg_F/ft]
Desired Units: W/[in*deg_C]

I've given it a go a couple of time and gotten very different results. So i figure i'm missing something.
Now i know this is likely to be a simple problem and that we all learnt unit conversion very early on so please go easy on me!!

Thanks

 

[Montemayor]

themaniac:

What you need is a strong, FREE, dose of Uconeer. It's just the ticket for this ailment. Go to thread378-90884 and read Katmar's(a.k.a. Harvey Wilson) recommendation.

This free (well, not actually "free" - it's shareware) software will solve all your conversion nightmares.

Art Montemayor
Spring, TX

 

[zdas04]

That "inch" term in the result is interesting, but this is really pretty easy.

Even though the temperature units are F & C, pretend they are R and K (which is valid since you're talking about incremental values). Then the conversion is:

(BTU/(hr*ft^2*F/ft))= [BTU/(hr*ft*R)]*(W/(3.4121 BTU/hr) * ft/(12 in) * R/(1.8 K) = original value / 73.70136

David

 

[tickle]

http://www.convert-me.com/en/

This does not have the exact conversion that you are looking for but does have some more unusual conversions

1 BTU/[hr*ft^2*deg_F/ft]= 1.7307 W/m.K
= 1.7307/39.37 W/in.K
= 1/22.7480 W/in.K

which is different to zdas04 - check the conversion for temperature (1K = 1.8R) dividing 73.7 by 1.8^2 gives 22.75

 

[zdas04]

Tickle,
Sure glad you found where my constant was wrong, I'd have hated to stay up all night trying to find where I screwed up.

David