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[EnergyPlus_Support] Re: Btu Of Basement Concrete?

Thank you, I do not know why I did not think of that?  But thanks a million!  That makes a big difference, so I will crunch them numbers and rethink through it all.

Here are some other comments I found, the later one agrees with yours.

"All of my sources list the specific heat for concrete at ~.19 BTUs per pound. That jives nicely with the typical specific heat of most rocks being ~ .19 to .21 BTUs per pound. Since concrete weighs ~ 150 lb per cubic feet or 4000 lb per yard it would take ~ 30 BTUs to warm one cubic foot of concrete 1 degree F or 810 BTUs per degree per cubic yard. But all of the Pros on this site already knew that;) " ~ SciGuy Hugh Mason

Another post says:

"Concrete
The specific heat of concrete is 0.156. So, it takes 0.156 btu to raise the temperature of 1 pound of concrete 1 degree F. " ~ Eugene Silberstein

http://www.heatinghelp.com/forum-thread/105952/what-is-the-formula-for-cement-btus-compared-to-water-btus

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Jim Dirkes" <jim@...> wrote:
>
> Dear GreenEnergyProject,
> 
>  
> 
> You want the specific heat of concrete, which is about 0.156 BTU / # / F -
> quite a bit lower than water!
> 
>  
> 
> The Building Performance Team
> James V. Dirkes II, P.E., BEMP , LEED AP
> 1631 Acacia Drive NW
> Grand Rapids, MI 49504
> 616 450 8653
> 




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