[EnergyPlus_Support] Re: U-factor floor in contact with ground

["FrancescoP" <direzionecontraria@xxxxxxxx>]

Thank you for your advice, Jason. I read that part of the Engineering reference. 
Therefore if I know the F-factor I can calculate the U-factor or if I know the U-factor I can calculate the F-factor, but how can I do if I know only the dimensions of the building, the thermal conductivity of the soil, thickness and thermal conductivities of the layers composing the slab-on-grade floor? 
Best Regards
Francesco Passerini


--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Jason Kirkpatrick <jason.alan.kirkpatrick@...> wrote:
>
> Again you should read page 131 of the engineering reference, which gives
> the following in terms of R value
> 
> F-Factor  x   Exposed Perimeter Wall Length  / Zone Floor Area  =
> Effective U Value
> 
> rearranged gives
> 
> F-Factor =  U-Value x Zone Floor Area / Exposed Perimeter Wall Length
>



------------------------------------

Primary EnergyPlus support is found at:
http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx

The primary EnergyPlus web site is found at:
http://www.energyplus.gov

The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/

Attachments are currently allowed but be mindful that not everyone has a high speed connection.  Limit attachments to small files.

EnergyPlus Documentation is searchable.  Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/EnergyPlus_Support/

<*> Your email settings:
    Individual Email | Traditional

<*> To change settings online go to:
    http://groups.yahoo.com/group/EnergyPlus_Support/join
    (Yahoo! ID required)

<*> To change settings via email:
    EnergyPlus_Support-digest@xxxxxxxxxxxxxxx 
    EnergyPlus_Support-fullfeatured@xxxxxxxxxxxxxxx

<*> To unsubscribe from this group, send an email to:
    EnergyPlus_Support-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/